| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
Commit:
f77084d96355 "x86/mm/pat: Disable preemption around __flush_tlb_all()"
addressed a case where __flush_tlb_all() is called without preemption
being disabled. It also left a warning to catch other cases where
preemption is not disabled.
That warning triggers for the memory hotplug path which is also used for
persistent memory enabling:
WARNING: CPU: 35 PID: 911 at ./arch/x86/include/asm/tlbflush.h:460
RIP: 0010:__flush_tlb_all+0x1b/0x3a
[..]
Call Trace:
phys_pud_init+0x29c/0x2bb
kernel_physical_mapping_init+0xfc/0x219
init_memory_mapping+0x1a5/0x3b0
arch_add_memory+0x2c/0x50
devm_memremap_pages+0x3aa/0x610
pmem_attach_disk+0x585/0x700 [nd_pmem]
Andy wondered why a path that can sleep was using __flush_tlb_all() [1]
and Dave confirmed the expectation for TLB flush is for modifying /
invalidating existing PTE entries, but not initial population [2]. Drop
the usage of __flush_tlb_all() in phys_{p4d,pud,pmd}_init() on the
expectation that this path is only ever populating empty entries for the
linear map. Note, at linear map teardown time there is a call to the
all-cpu flush_tlb_all() to invalidate the removed mappings.
[1]: https://lkml.kernel.org/r/[email protected]
[2]: https://lkml.kernel.org/r/[email protected]
[ mingo: Minor readability edits. ]
Suggested-by: Dave Hansen <[email protected]>
Reported-by: Andy Lutomirski <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Fixes: f77084d96355 ("x86/mm/pat: Disable preemption around __flush_tlb_all()")
Link: http://lkml.kernel.org/r/154395944713.32119.15611079023837132638.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The usage of __flush_tlb_all() in the kernel_physical_mapping_init()
path is not necessary. In general flushing the TLB is not required when
updating an entry from the !present state. However, to give confidence
in the future removal of TLB flushing in this path, use the new
set_pte_safe() family of helpers to assert that the !present assumption
is true in this path.
[ mingo: Minor readability edits. ]
Suggested-by: Peter Zijlstra <[email protected]>
Suggested-by: Dave Hansen <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/154395944177.32119.8524957429632012270.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Commit:
f77084d96355 "x86/mm/pat: Disable preemption around __flush_tlb_all()"
introduced a warning to capture cases __flush_tlb_all() is called without
pre-emption disabled. It triggers a false positive warning in the memory
hotplug path.
On investigation it was found that the __flush_tlb_all() calls are not
necessary. However, they are only "not necessary" in practice provided
the ptes are being initially populated from the !present state.
Introduce set_pte_safe() as a sanity check that the pte is being updated
in a way that does not require a TLB flush.
Forgive the macro, the availability of the various of set_pte() levels
is hit and miss across architectures.
[ mingo: Minor readability edits. ]
Suggested-by: Peter Zijlstra <[email protected]>
Suggested-by: Dave Hansen <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
In preparation for introducing '_safe' versions of page table entry 'set'
helpers, introduce generic versions of p4d_same() and pgd_same().
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/154395943153.32119.1733586547359626311.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <[email protected]>
|
|
In preparation for {pmd,pud}_same() to be used outside of transparent
huge page code paths, make them unconditionally available. This enables
them to be used in the definition of a new family of
set_{pte,pmd,pud,p4d,pgd}_safe() helpers.
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/154395942644.32119.10238934183949418128.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <[email protected]>
|
|
- Make the oops messages a bit less scary (don't mention 'HW errors')
- Turn 'PROT USER' (which is visually easily confused with PROT_USER)
into individual bit descriptors: "[PROT] [USER]".
This also makes "[normal kernel read fault]" more apparent.
- De-abbreviate variables to make the code easier to read
- Use vertical alignment where appropriate.
- Add comment about string size limits and the helper function.
- Remove unnecessary line breaks.
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
One of Linus' favorite hobbies seems to be looking at OOPSes and
decoding the error code in his head. This is not one of my favorite
hobbies :)
Teach the page fault OOPS hander to decode the error code. If it's
a !USER fault from user mode, print an explicit note to that effect
and print out the addresses of various tables that might cause such
an error.
With this patch applied, if I intentionally point the LDT at 0x0 and
run the x86 selftests, I get:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
HW error: normal kernel read fault
This was a system access from user code
IDT: 0xfffffe0000000000 (limit=0xfff) GDT: 0xfffffe0000001000 (limit=0x7f)
LDTR: 0x50 -- base=0x0 limit=0xfff7
TR: 0x40 -- base=0xfffffe0000003000 limit=0x206f
PGD 800000000456e067 P4D 800000000456e067 PUD 4623067 PMD 0
SMP PTI
CPU: 0 PID: 153 Comm: ldt_gdt_64 Not tainted 4.19.0+ #1317
Hardware name: ...
RIP: 0033:0x401454
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/11212acb25980cd1b3030875cd9502414fbb214d.1542841400.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Rather than hardcoding 6 with a comment, use the defined constants.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/e023f20352b0d05a8b0205629897917262d2ad68.1542841400.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
show_regs() shows the CS in the CPU register instead of the value in
regs. This means that we'll probably print "CS: 0010" almost all
the time regardless of what was actually in CS when the kernel
malfunctioned. This gives a particularly confusing result if we
OOPSed due to an implicit supervisor access from user mode.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/4e36812b6e1e95236a812021d35cbf22746b5af6.1542841400.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
This avoids a situation in which we attempt to apply various fixups
that are not intended to handle implicit supervisor accesses from
user mode if we screw up in a way that causes this type of fault.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/9999f151d72ff352265f3274c5ab3a4105090f49.1542841400.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
All of the fault handling code now corrently checks user_mode(regs)
as needed, and nothing depends on the X86_PF_USER bit being munged.
Get rid of the sw_error code and use hw_error_code everywhere.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/078f5b8ae6e8c79ff8ee7345b5c476c45003e5ac.1542841400.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The fault handling code sets the cr2, trap_nr, and error_code fields
in thread_struct before OOPSing. No one reads those fields during
an OOPS, so remove the code to set them.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/d418022aa0fad9cb40467aa7acaf4e95be50ee96.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The error code in a page fault on a kernel address indicates
whether that address is mapped, which should not be revealed in a signal.
The normal code path for a page fault on a kernel address sanitizes the bit,
but the paths for vsyscall emulation and SIGBUS do not. Both are
harmless, but for subtle reasons. SIGBUS is never sent for a kernel
address, and vsyscall emulation will never fault on a kernel address
per se because it will fail an access_ok() check instead.
Make the code more robust by adding a helper that sets the relevant
fields and sanitizing the error code in the helper. This also
cleans up the code -- we had three copies of roughly the same thing.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/b31159bd55bd0c4fa061a20dfd6c429c094bebaa.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
__bad_area_nosemaphore() currently checks the X86_PF_USER bit in the
error code to decide whether to send a signal or to treat the fault
as a kernel error. This can cause somewhat erratic behavior. The
straightforward cases where the CPL agrees with the hardware USER
bit are all correct, but the other cases are confusing.
- A user instruction accessing a kernel address with supervisor
privilege (e.g. a descriptor table access failed). The USER bit
will be clear, and we OOPS. This is correct, because it indicates
a kernel bug, not a user error.
- A user instruction accessing a user address with supervisor
privilege (e.g. a descriptor table was incorrectly pointing at
user memory). __bad_area_nosemaphore() will be passed a modified
error code with the user bit set, and we will send a signal.
Sending the signal will work (because the regs and the entry
frame genuinely come from user mode), but we really ought to
OOPS, as this event indicates a severe kernel bug.
- A kernel instruction with user privilege (i.e. WRUSS). This
should OOPS or get fixed up. The current code would instead try
send a signal and malfunction.
Change the logic: a signal should be sent if the faulting context is
user mode *and* the access has user privilege. Otherwise it's
either a kernel mode fault or a failed implicit access, either of
which should end up in no_context().
Note to -stable maintainers: don't backport this unless you backport
CET. The bug it fixes is unobservable in current kernels unless
something is extremely wrong.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/10e509c43893170e262e82027ea399130ae81159.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Currently, if a user program somehow triggers an implicit supervisor
access to a user address (e.g. if the kernel somehow sets LDTR to a
user address), it will be incorrectly detected as a SMAP violation
if AC is clear and SMAP is enabled. This is incorrect -- the error
has nothing to do with SMAP. Fix the condition so that only
accesses with the hardware USER bit set are diagnosed as SMAP
violations.
With the logic fixed, an implicit supervisor access to a user address
will hit the code lower in the function that is intended to handle it
even if SMAP is enabled. That logic is still a bit buggy, and later
patches will clean it up.
I *think* this code is still correct for WRUSS, and I've added a
comment to that effect.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/d1d1b2e66ef31f884dba172084486ea9423ddcdb.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
smap_violation() has a single caller, and the contents are a bit
nonsensical. I'm going to fix it, but first let's fold it into its
caller for ease of comprehension.
In this particular case, the user_mode(regs) check is incorrect --
it will cause false positives in the case of a user-initiated
kernel-privileged access.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/806c366f6ca861152398ce2c01744d59d9aceb6d.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Add X86_FEATURE_SMAP to the disabled features mask as appropriate
and use cpu_feature_enabled() in the fault code. This lets us get
rid of a redundant IS_ENABLED(CONFIG_X86_SMAP).
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/fe93332eded3d702f0b0b4cf83928d6830739ba3.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The fault-handling code that takes mmap_sem needs to avoid a
deadlock that could occur if the kernel took a bad (OOPS-worthy)
page fault on a user address while holding mmap_sem. This can only
happen if the faulting instruction was in the kernel
(i.e. user_mode(regs)). Rather than checking the sw_error_code
(which will have the USER bit set if the fault was a USER-permission
access *or* if user_mode(regs)), just check user_mode(regs)
directly.
The old code would have malfunctioned if the kernel executed a bogus
WRUSS instruction while holding mmap_sem. Fortunately, that is
extremely unlikely in current kernels, which don't use WRUSS.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/4b89b542e8ceba9bd6abde2f386afed6d99244a9.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The current x86 page fault handler allows stack access below the stack
pointer if it is no more than 64k+256 bytes. Any access beyond the 64k+
limit will cause a segmentation fault.
The gcc -fstack-check option generates code to probe the stack for
large stack allocation to see if the stack is accessible. The newer gcc
does that while updating the %rsp simultaneously. Older gcc's like gcc4
doesn't do that. As a result, an application compiled with an old gcc
and the -fstack-check option may fail to start at all:
$ cat test.c
int main() {
char tmp[1024*128];
printf("### ok\n");
return 0;
}
$ gcc -fstack-check -g -o test test.c
$ ./test
Segmentation fault
The old binary was working in older kernels where expand_stack() was
somehow called before the check. But it is not working in newer kernels.
Besides, the 64k+ limit check is kind of crude and will not catch a
lot of mistakes that userspace applications may be misbehaving anyway.
I think the kernel isn't the right place for this kind of tests. We
should leave it to userspace instrumentation tools to perform them.
The 64k+ limit check is now removed to just let expand_stack() decide
if a segmentation fault should happen, when the RLIMIT_STACK limit is
exceeded, for example.
Signed-off-by: Waiman Long <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
|
|
Pull networking fixes from David Miller:
"One last pull request before heading to Vancouver for LPC, here we have:
1) Don't forget to free VSI contexts during ice driver unload, from
Victor Raj.
2) Don't forget napi delete calls during device remove in ice driver,
from Dave Ertman.
3) Don't request VLAN tag insertion of ibmvnic device when SKB
doesn't have VLAN tags at all.
4) IPV4 frag handling code has to accomodate the situation where two
threads try to insert the same fragment into the hash table at the
same time. From Eric Dumazet.
5) Relatedly, don't flow separate on protocol ports for fragmented
frames, also from Eric Dumazet.
6) Memory leaks in qed driver, from Denis Bolotin.
7) Correct valid MTU range in smsc95xx driver, from Stefan Wahren.
8) Validate cls_flower nested policies properly, from Jakub Kicinski.
9) Clearing of stats counters in mc88e6xxx driver doesn't retain
important bits in the G1_STATS_OP register causing the chip to
hang. Fix from Andrew Lunn"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
act_mirred: clear skb->tstamp on redirect
net: dsa: mv88e6xxx: Fix clearing of stats counters
tipc: fix link re-establish failure
net: sched: cls_flower: validate nested enc_opts_policy to avoid warning
net: mvneta: correct typo
flow_dissector: do not dissect l4 ports for fragments
net: qualcomm: rmnet: Fix incorrect assignment of real_dev
net: aquantia: allow rx checksum offload configuration
net: aquantia: invalid checksumm offload implementation
net: aquantia: fixed enable unicast on 32 macvlan
net: aquantia: fix potential IOMMU fault after driver unbind
net: aquantia: synchronized flow control between mac/phy
net: smsc95xx: Fix MTU range
net: stmmac: Fix RX packet size > 8191
qed: Fix potential memory corruption
qed: Fix SPQ entries not returned to pool in error flows
qed: Fix blocking/unlimited SPQ entries leak
qed: Fix memory/entry leak in qed_init_sp_request()
inet: frags: better deal with smp races
net: hns3: bugfix for not checking return value
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- fix build errors in binrpm-pkg and bindeb-pkg targets
- fix false positive matches in merge_config.sh
- fix build version mismatch in deb-pkg target
- fix dtbs_install handling in (bin)deb-pkg target
- revert a commit that allows setlocalversion to write to source tree
* tag 'kbuild-fixes-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
builddeb: Fix inclusion of dtbs in debian package
Revert "scripts/setlocalversion: git: Make -dirty check more robust"
kbuild: deb-pkg: fix too low build version number
kconfig: merge_config: avoid false positive matches from comment lines
kbuild: deb-pkg: fix bindeb-pkg breakage when O= is used
kbuild: rpm-pkg: fix binrpm-pkg breakage when O= is used
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"Several fixes to recent release (4.19, fixes tagged for stable) and
other fixes"
* tag 'for-4.20-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix missing delayed iputs on unmount
Btrfs: fix data corruption due to cloning of eof block
Btrfs: fix infinite loop on inode eviction after deduplication of eof block
Btrfs: fix deadlock on tree root leaf when finding free extent
btrfs: avoid link error with CONFIG_NO_AUTO_INLINE
btrfs: tree-checker: Fix misleading group system information
Btrfs: fix missing data checksums after a ranged fsync (msync)
btrfs: fix pinned underflow after transaction aborted
Btrfs: fix cur_offset in the error case for nocow
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"A large number of ext4 bug fixes, mostly buffer and memory leaks on
error return cleanup paths"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: missing !bh check in ext4_xattr_inode_write()
ext4: fix buffer leak in __ext4_read_dirblock() on error path
ext4: fix buffer leak in ext4_expand_extra_isize_ea() on error path
ext4: fix buffer leak in ext4_xattr_move_to_block() on error path
ext4: release bs.bh before re-using in ext4_xattr_block_find()
ext4: fix buffer leak in ext4_xattr_get_block() on error path
ext4: fix possible leak of s_journal_flag_rwsem in error path
ext4: fix possible leak of sbi->s_group_desc_leak in error path
ext4: remove unneeded brelse call in ext4_xattr_inode_update_ref()
ext4: avoid possible double brelse() in add_new_gdb() on error path
ext4: avoid buffer leak in ext4_orphan_add() after prior errors
ext4: avoid buffer leak on shutdown in ext4_mark_iloc_dirty()
ext4: fix possible inode leak in the retry loop of ext4_resize_fs()
ext4: fix missing cleanup if ext4_alloc_flex_bg_array() fails while resizing
ext4: add missing brelse() update_backups()'s error path
ext4: add missing brelse() add_new_gdb_meta_bg()'s error path
ext4: add missing brelse() in set_flexbg_block_bitmap()'s error path
ext4: avoid potential extra brelse in setup_new_flex_group_blocks()
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of x86 fixes:
- Cure the LDT remapping to user space on 5 level paging which ended
up in the KASLR space
- Remove LDT mapping before freeing the LDT pages
- Make NFIT MCE handling more robust
- Unbreak the VSMP build by removing the dependency on paravirt ops
- Support broken PIT emulation on Microsoft hyperV
- Don't trace vmware_sched_clock() to avoid tracer recursion
- Remove -pipe from KBUILD CFLAGS which breaks clang and is also
slower on GCC
- Trivial coding style and typo fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/vmware: Do not trace vmware_sched_clock()
x86/vsmp: Remove dependency on pv_irq_ops
x86/ldt: Remove unused variable in map_ldt_struct()
x86/ldt: Unmap PTEs for the slot before freeing LDT pages
x86/mm: Move LDT remap out of KASLR region on 5-level paging
acpi/nfit, x86/mce: Validate a MCE's address before using it
acpi/nfit, x86/mce: Handle only uncorrectable machine checks
x86/build: Remove -pipe from KBUILD_CFLAGS
x86/hyper-v: Fix indentation in hv_do_fast_hypercall16()
Documentation/x86: Fix typo in zero-page.txt
x86/hyper-v: Enable PIT shutdown quirk
clockevents/drivers/i8253: Add support for PIT shutdown quirk
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A bunch of perf tooling fixes:
- Make the Intel PT SQL viewer more robust
- Make the Intel PT debug log more useful
- Support weak groups in perf record so it's behaving the same way as
perf stat
- Display the LBR stats in callchain entries properly in perf top
- Handle different PMu names with common prefix properlin in pert
stat
- Start syscall augmenting in perf trace. Preparation for
architecture independent eBPF instrumentation of syscalls.
- Fix build breakage in JVMTI perf lib
- Fix arm64 tools build failure wrt smp_load_{acquire,release}"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Do not zero sample_id_all for group members
perf tools: Fix undefined symbol scnprintf in libperf-jvmti.so
perf beauty: Use SRCARCH, ARCH=x86_64 must map to "x86" to find the headers
perf intel-pt: Add MTC and CYC timestamps to debug log
perf intel-pt: Add more event information to debug log
perf scripts python: exported-sql-viewer.py: Fix table find when table re-ordered
perf scripts python: exported-sql-viewer.py: Add help window
perf scripts python: exported-sql-viewer.py: Add Selected branches report
perf scripts python: exported-sql-viewer.py: Fall back to /usr/local/lib/libxed.so
perf top: Display the LBR stats in callchain entry
perf stat: Handle different PMU names with common prefix
perf record: Support weak groups
perf evlist: Move perf_evsel__reset_weak_group into evlist
perf augmented_syscalls: Start collecting pathnames in the BPF program
perf trace: Fix setting of augmented payload when using eBPF + raw_syscalls
perf trace: When augmenting raw_syscalls plug raw_syscalls:sys_exit too
perf examples bpf: Start augmenting raw_syscalls:sys_{start,exit}
tools headers barrier: Fix arm64 tools build failure wrt smp_load_{acquire,release}
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
"Just the removal of a redundant call into the sched deadline overrun
check"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-cpu-timers: Remove useless call to check_dl_overrun()
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"Two small scheduler fixes:
- Take hotplug lock in sched_init_smp(). Technically not really
required, but lockdep will complain other.
- Trivial comment fix in sched/fair"
* 'sched/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Fix a comment in task_numa_fault()
sched/core: Take the hotplug lock in sched_init_smp()
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking build fix from Thomas Gleixner:
"A single fix for a build fail with CONFIG_PROFILE_ALL_BRANCHES=y in
the qspinlock code"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/qspinlock: Fix compile error
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core fixes from Thomas Gleixner:
"A couple of fixlets for the core:
- Kernel doc function documentation fixes
- Missing prototypes for weak watchdog functions"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
resource/docs: Complete kernel-doc style function documentation
watchdog/core: Add missing prototypes for weak functions
resource/docs: Fix new kernel-doc warnings
|
|
If sch_fq is used at ingress, skbs that might have been
timestamped by net_timestamp_set() if a packet capture
is requesting timestamps could be delayed by arbitrary
amount of time, since sch_fq time base is MONOTONIC.
Fix this problem by moving code from sch_netem.c to act_mirred.c.
Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC")
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|
|
The mv88e6161 would sometime fail to probe with a timeout waiting for
the switch to complete an operation. This operation is supposed to
clear the statistics counters. However, due to a read/modify/write,
without the needed mask, the operation actually carried out was more
random, with invalid parameters, resulting in the switch not
responding. We need to preserve the histogram mode bits, so apply a
mask to keep them.
Reported-by: Chris Healy <[email protected]>
Fixes: 40cff8fca9e3 ("net: dsa: mv88e6xxx: Fix stats histogram mode")
Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|
|
When a link failure is detected locally, the link is reset, the flag
link->in_session is set to false, and a RESET_MSG with the 'stopping'
bit set is sent to the peer.
The purpose of this bit is to inform the peer that this endpoint just
is going down, and that the peer should handle the reception of this
particular RESET message as a local failure. This forces the peer to
accept another RESET or ACTIVATE message from this endpoint before it
can re-establish the link. This again is necessary to ensure that
link session numbers are properly exchanged before the link comes up
again.
If a failure is detected locally at the same time at the peer endpoint
this will do the same, which is also a correct behavior.
However, when receiving such messages, the endpoints will not
distinguish between 'stopping' RESETs and ordinary ones when it comes
to updating session numbers. Both endpoints will copy the received
session number and set their 'in_session' flags to true at the
reception, while they are still expecting another RESET from the
peer before they can go ahead and re-establish. This is contradictory,
since, after applying the validation check referred to below, the
'in_session' flag will cause rejection of all such messages, and the
link will never come up again.
We now fix this by not only handling received RESET/STOPPING messages
as a local failure, but also by omitting to set a new session number
and the 'in_session' flag in such cases.
Fixes: 7ea817f4e832 ("tipc: check session number before accepting link protocol messages")
Signed-off-by: Jon Maloy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|
|
Commit 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules")
moved the location of 'dtbs_install' target which caused dtbs to not be
installed when building debian package with 'bindeb-pkg' target. Update
the builddeb script to use the same logic that determines if there's a
'dtbs_install' target which is presence of the arch dts directory. Also,
use CONFIG_OF_EARLY_FLATTREE instead of CONFIG_OF as that's a better
indication of whether we are building dtbs.
This commit will also have the side effect of installing dtbs on any
arch that has dts files. Previously, it was dependent on whether the
arch defined 'dtbs_install'.
Fixes: 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules")
Reported-by: Nuno Gonçalves <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
|
|
This reverts commit 6147b1cf19651c7de297e69108b141fb30aa2349.
The reverted patch results in attempted write access to the source
repository, even if that repository is mounted read-only.
Output from "strace git status -uno --porcelain":
getcwd("/tmp/linux-test", 129) = 16
open("/tmp/linux-test/.git/index.lock", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) =
-1 EROFS (Read-only file system)
While git appears to be able to handle this situation, a monitored
build environment (such as the one used for Chrome OS kernel builds)
may detect it and bail out with an access violation error. On top of
that, the attempted write access suggests that git _will_ write to the
file even if a build output directory is specified. Users may have the
reasonable expectation that the source repository remains untouched in
that situation.
Fixes: 6147b1cf19651 ("scripts/setlocalversion: git: Make -dirty check more robust"
Cc: Genki Sky <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
Reviewed-by: Brian Norris <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
|
|
Since commit b41d920acff8 ("kbuild: deb-pkg: split generating packaging
and build"), the build version of the kernel contained in a deb package
is too low by 1.
Prior to the bad commit, the kernel was built first, then the number
in .version file was read out, and written into the debian control file.
Now, the debian control file is created before the kernel is actually
compiled, which is causing the version number mismatch.
Let the mkdebian script pass KBUILD_BUILD_VERSION=${revision} to require
the build system to use the specified version number.
Fixes: b41d920acff8 ("kbuild: deb-pkg: split generating packaging and build")
Reported-by: Doug Smythies <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
Tested-by: Doug Smythies <[email protected]>
|
|
The current SED_CONFIG_EXP could match to comment lines in config
fragment files, especially when CONFIG_PREFIX_ is empty. For example,
Buildroot uses empty prefixing; starting symbols with BR2_ is just
convention.
Make the sed expression more robust against false positives from
comment lines. The new sed expression matches to only valid patterns.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Petr Vorel <[email protected]>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <[email protected]>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small tty fixes for 4.20-rc2
One of these missed the original 4.19-final release, I missed that I
hadn't done a pull request for it as it was in linux-next and my
branch for a long time, that's my fault.
The others are small, fixing some reported issues and finally fixing
the termios mess for alpha so that glibc has a chance to implement
some missing functionality that has been pending for many years now.
All of these have been in linux-next with no reported issues"
* tag 'tty-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: sh-sci: Fix could not remove dev_attr_rx_fifo_timeout
arch/alpha, termios: implement BOTHER, IBSHIFT and termios2
termios, tty/tty_baudrate.c: fix buffer overrun
vt: fix broken display when running aptitude
serial: sh-sci: Fix receive on SCIFA/SCIFB variants with DMA
|
|
Pull drm fixes from Dave Airlie:
"drm: i915, amdgpu, sun4i, exynos and etnaviv fixes:
- amdgpu has some display fixes, KFD ioctl fixes and a Vega20 bios
interaction fix.
- sun4i has some NULL checks added
- i915 has a 32-bit system fix, LPE audio oops, and HDMI2.0 clock
fixes.
- Exynos has a 3 regression fixes (one frame counter, fbdev missing,
dsi->panel check)
- Etnaviv has a single fencing fix for GPU recovery"
* tag 'drm-fixes-2018-11-11' of git://anongit.freedesktop.org/drm/drm: (39 commits)
drm/amd/amdgpu/dm: Fix dm_dp_create_fake_mst_encoder()
drm/amd/display: Drop reusing drm connector for MST
drm/amd/display: Cleanup MST non-atomic code workaround
drm/amd/powerplay: always use fast UCLK switching when UCLK DPM enabled
drm/amd/powerplay: set a default fclk/gfxclk ratio
drm/amdgpu/display/dce11: only enable FBC when selected
drm/amdgpu/display/dm: handle FBC dc feature parameter
drm/amdgpu/display/dc: add FBC to dc_config
drm/amdgpu: add DC feature mask module parameter
drm/amdgpu/display: check if fbc is available in set_static_screen_control (v2)
drm/amdgpu/vega20: add CLK base offset
drm/amd/display: Stop leaking planes
drm/amd/display: Fix misleading buffer information
Revert "drm/amd/display: set backlight level limit to 1"
drm/amd: Update atom_smu_info_v3_3 structure
drm/i915: Fix ilk+ watermarks when disabling pipes
drm/sun4i: tcon: prevent tcon->panel dereference if NULL
drm/sun4i: tcon: fix check of tcon->panel null pointer
drm/i915: Don't oops during modeset shutdown after lpe audio deinit
drm/i915: Mark pin flags as u64
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace fixes from Eric Biederman:
"I believe all of these are simple obviously correct bug fixes. These
fall into two groups:
- Fixing the implementation of MNT_LOCKED which prevents lesser
privileged users from seeing unders mounts created by more
privileged users.
- Fixing the extended uid and group mapping in user namespaces.
As well as ensuring the code looks correct I have spot tested these
changes as well and in my testing the fixes are working"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
mount: Prevent MNT_DETACH from disconnecting locked mounts
mount: Don't allow copying MNT_UNBINDABLE|MNT_LOCKED mounts
mount: Retest MNT_LOCKED in do_umount
userns: also map extents in the reverse map to kernel IDs
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A small set of fixes for clk drivers.
One to fix a DT refcount imbalance, two to mark some Amlogic clks as
critical, and one final one that fixes a clk name for the Qualcomm
driver merged this cycle"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: qcom: gcc: Fix board clock node name
clk: meson: axg: mark fdiv2 and fdiv3 as critical
clk: meson-gxbb: set fclk_div3 as CLK_IS_CRITICAL
clk: fixed-factor: fix of_node_get-put imbalance
|
|
into drm-fixes
Fixes for 4.20:
- DC MST fixes
- DC FBC fix
- Vega20 updates to support the latest vbios
- KFD type fixes for ioctl headers
Signed-off-by: Dave Airlie <[email protected]>
From: Alex Deucher <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
|
|
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
- sun4i: tcon->panel NULL deref protections (Giulio)
Cc: Giulio Benetti <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
From: Sean Paul <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/20181107205051.GA27823@art_vandelay
|
|
git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
Bugzilla #108282 fixed: Avoid graphics corruption on 32-bit systems for Mesa 18.2.x
Avoid OOPS on LPE audio deinit. Remove two unused W/As.
Fix to correct HDMI 2.0 audio clock modes to spec.
Signed-off-by: Dave Airlie <[email protected]>
From: Joonas Lahtinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
|
|
TCA_FLOWER_KEY_ENC_OPTS and TCA_FLOWER_KEY_ENC_OPTS_MASK can only
currently contain further nested attributes, which are parsed by
hand, so the policy is never actually used resulting in a W=1
build warning:
net/sched/cls_flower.c:492:1: warning: ‘enc_opts_policy’ defined but not used [-Wunused-const-variable=]
enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
Add the validation anyway to avoid potential bugs when other
attributes are added and to make the attribute structure slightly
more clear. Validation will also set extact to point to bad
attribute on error.
Fixes: 0a6e77784f49 ("net/sched: allow flower to match tunnel options")
Signed-off-by: Jakub Kicinski <[email protected]>
Acked-by: Simon Horman <[email protected]>
Acked-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Several fixes, mostly for rather recent regressions when running under
Xen"
* tag 'for-linus-4.20a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: remove size limit of privcmd-buf mapping interface
xen: fix xen_qlock_wait()
x86/xen: fix pv boot
xen-blkfront: fix kernel panic with negotiate_mq error path
xen/grant-table: Fix incorrect gnttab_dma_free_pages() pr_debug message
CONFIG_XEN_PV breaks xen_create_contiguous_region on ARM
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Fix occasional page fault during boot due to memblock resizing before
the linear map is up.
- Define NET_IP_ALIGN to 0 to improve the DMA performance on some
platforms.
- lib/raid6 test build fix.
- .mailmap update for Punit Agrawal
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: memblock: don't permit memblock resizing until linear mapping is up
arm64: mm: define NET_IP_ALIGN to 0
lib/raid6: Fix arm64 test build
mailmap: Update email for Punit Agrawal
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"I2C has one bugfix (qcom-geni driver), one arch enablement (i2c-omap
driver, no code change), and a new driver (nvidia-gpu) this time"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
usb: typec: ucsi: add support for Cypress CCGx
i2c: nvidia-gpu: make pm_ops static
i2c: add i2c bus driver for NVIDIA GPU
i2c: qcom-geni: Fix runtime PM mismatch with child devices
MAINTAINERS: Add entry for i2c-omap driver
i2c: omap: Enable for ARCH_K3
dt-bindings: i2c: omap: Add new compatible for AM654 SoCs
|
|
The reserved variable should be named reserved1.
Signed-off-by: Alexandre Belloni <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|
|
Only first fragment has the sport/dport information,
not the following ones.
If we want consistent hash for all fragments, we need to
ignore ports even for first fragment.
This bug is visible for IPv6 traffic, if incoming fragments
do not have a flow label, since skb_get_hash() will give
different results for first fragment and following ones.
It is also visible if any routing rule wants dissection
and sport or dport.
See commit 5e5d6fed3741 ("ipv6: route: dissect flow
in input path if fib rules need it") for details.
[edumazet] rewrote the changelog completely.
Fixes: 06635a35d13d ("flow_dissect: use programable dissector in skb_flow_dissect and friends")
Signed-off-by: 배석진 <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
|