| Age | Commit message (Collapse) | Author | Files | Lines |
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Add selftests validating libbpf's auto-resizing of load/store instructions
when used with CO-RE relocations. An explicit and manual approach with using
bpf_core_read() is also demonstrated and tested. Separate BPF program is
supposed to fail due to using signed integers of sizes that differ from
kernel's sizes.
To reliably simulate 32-bit BTF (i.e., the one with sizeof(long) ==
sizeof(void *) == 4), selftest generates its own custom BTF and passes it as
a replacement for real kernel BTF. This allows to test 32/64-bitness mix on
all architectures.
Signed-off-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Use generalized BTF parsing logic, making it possible to parse BTF both from
ELF file, as well as a raw BTF dump. This makes it easier to write custom
tests with manually generated BTFs.
Signed-off-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Add support for patching instructions of the following form:
- rX = *(T *)(rY + <off>);
- *(T *)(rX + <off>) = rY;
- *(T *)(rX + <off>) = <imm>, where T is one of {u8, u16, u32, u64}.
For such instructions, if the actual kernel field recorded in CO-RE relocation
has a different size than the one recorded locally (e.g., from vmlinux.h),
then libbpf will adjust T to an appropriate 1-, 2-, 4-, or 8-byte loads.
In general, such transformation is not always correct and could lead to
invalid final value being loaded or stored. But two classes of cases are
always safe:
- if both local and target (kernel) types are unsigned integers, but of
different sizes, then it's OK to adjust load/store instruction according to
the necessary memory size. Zero-extending nature of such instructions and
unsignedness make sure that the final value is always correct;
- pointer size mismatch between BPF target architecture (which is always
64-bit) and 32-bit host kernel architecture can be similarly resolved
automatically, because pointer is essentially an unsigned integer. Loading
32-bit pointer into 64-bit BPF register with zero extension will leave
correct pointer in the register.
Both cases are necessary to support CO-RE on 32-bit kernels, as `unsigned
long` in vmlinux.h generated from 32-bit kernel is 32-bit, but when compiled
with BPF program for BPF target it will be treated by compiler as 64-bit
integer. Similarly, pointers in vmlinux.h are 32-bit for kernel, but treated
as 64-bit values by compiler for BPF target. Both problems are now resolved by
libbpf for direct memory reads.
But similar transformations are useful in general when kernel fields are
"resized" from, e.g., unsigned int to unsigned long (or vice versa).
Now, similar transformations for signed integers are not safe to perform as
they will result in incorrect sign extension of the value. If such situation
is detected, libbpf will emit helpful message and will poison the instruction.
Not failing immediately means that it's possible to guard the instruction
based on kernel version (or other conditions) and make sure it's not
reachable.
If there is a need to read signed integers that change sizes between different
kernels, it's possible to use BPF_CORE_READ_BITFIELD() macro, which works both
with bitfields and non-bitfield integers of any signedness and handles
sign-extension properly. Also, bpf_core_read() with proper size and/or use of
bpf_core_field_size() relocation could allow to deal with such complicated
situations explicitly, if not so conventiently as direct memory reads.
Selftests added in a separate patch in progs/test_core_autosize.c demonstrate
both direct memory and probed use cases.
BPF_CORE_READ() is not changed and it won't deal with such situations as
automatically as direct memory reads due to the signedness integer
limitations, which are much harder to detect and control with compiler macro
magic. So it's encouraged to utilize direct memory reads as much as possible.
Signed-off-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Bypass CO-RE relocations step for BPF programs that are not going to be
loaded. This allows to have BPF programs compiled in and disabled dynamically
if kernel is not supposed to provide enough relocation information. In such
case, there won't be unnecessary warnings about failed relocations.
Fixes: d929758101fc ("libbpf: Support disabling auto-loading BPF programs")
Signed-off-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Some variables with incorrect type were passed to "of_property_read_u32"
API, "of_property_read_u32" API was expecting an "u32 *" but the formal
parameter that was passed was of type "int *". Fixed the issue by
changing the variable types from "int" to "u32" and initialized with a
default value. Fixed sparse warning.
Addresses-Coverity: "incompatible_param"
Addresses-Coverity: "UNINIT(Using uninitialized value)"
Signed-off-by: Srinivas Neeli <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/0651544d22f3c25893ca9d445b14823f0dfddfc8.1600073396.git.michal.simek@xilinx.com
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Check return value of set_reset_mode() for error.
Addresses-Coverity: "check_return"
Signed-off-by: Srinivas Neeli <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/bac2c2b857986472a11db341b3f6f7a8905ad0dd.1600073396.git.michal.simek@xilinx.com
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Bit enlarging is observed for CANFD2.0 when brp is 1,
So change brp_min value to 2.
Signed-off-by: Srinivas Neeli <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/bca871d7f3ca9c653d50e63c5b60028f2bdf3fb0.1600073396.git.michal.simek@xilinx.com
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Since commit:
048e3a34a2e7 can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment
the driver polls the IP core's internal bit MCR[LPM_ACK] as stop mode
acknowledge and not the acknowledgment on chip level.
This means the 4th and 5th value of the property "fsl,stop-mode" isn't used
anymore. This patch removes the used "ack_gpr" and "ack_bit" from the driver.
Link: http://lore.kernel.org/r/[email protected]
Fixes: 048e3a34a2e7 ("can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment")
Cc: Joakim Zhang <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Since commit:
048e3a34a2e7 can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment
the driver polls the IP core's internal bit MCR[LPM_ACK] as stop mode
acknowledge and not the acknowledgment on chip level.
This means the 4th and 5th value of the property "fsl,stop-mode" isn't used
anymore. It will be removed from the driver in the next patch, so remove it
from the binding documentation.
Link: http://lore.kernel.org/r/[email protected]
Fixes: 048e3a34a2e7 ("can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment")
Cc: devicetree <[email protected]>
Cc: Joakim Zhang <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The compatible is a pattern match. Explicitly list all possible values.
Also mention that the ls1028ar1 must be followed by lx2160ar1.
Signed-off-by: Michael Walle <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Document SoC specific bindings for RZ/G2H (R8A774E1) SoC.
Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Marian-Cristian Rotariu <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Document the support for rcar_canfd on R8A774E1 SoC devices.
Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Marian-Cristian Rotariu <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Document RZ/G1H (r8a7742) SoC specific bindings. The R8A7742 CAN module
is identical to R-Car Gen2 family.
No driver change is needed due to the fallback compatible value
"renesas,rcar-gen2-can".
Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Chris Paterson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
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CAN Transport Protocols offer support for segmented Point-to-Point
communication between CAN nodes via two defined CAN Identifiers.
As CAN frames can only transport a small amount of data bytes
(max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this
segmentation is needed to transport longer PDUs as needed e.g. for
vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN traffic.
This protocol driver implements data transfers according to
ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
Signed-off-by: Oliver Hartkopp <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[mkl: Removed "WITH Linux-syscall-note" from isotp.c.
Fixed indention, a checkpatch warning and typos.
Replaced __u{8,32} by u{8,32}.
Removed always false (optlen < 0) check in isotp_setsockopt().]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Rename macro CAN_CALC_SYNC_SEG to CAN_SYNC_SEG and make it available
through include/linux/can/dev.h
Add an helper function can_bit_time() which returns the duration (in
time quanta) of one CAN bit.
Rationale for this patch: the sync segment and the bit time are two
concepts which are defined in the CAN ISO standard. Device drivers for
CAN might need those.
Please refer to ISO 11898-1:2015, section 11.3.1.1 "Bit time" for
additional information.
Signed-off-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[mkl: Let can_bit_time() return an unsinged int, make argument const]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Fix a compatibility problem when the old XDP_SHARED_UMEM mode is used
together with the xsk_socket__create() call. In the old XDP_SHARED_UMEM
mode, only sharing of the same device and queue id was allowed, and
in this mode, the fill ring and completion ring were shared between
the AF_XDP sockets.
Therefore, it was perfectly fine to call the xsk_socket__create() API
for each socket and not use the new xsk_socket__create_shared() API.
This behavior was ruined by the commit introducing XDP_SHARED_UMEM
support between different devices and/or queue ids. This patch restores
the ability to use xsk_socket__create in these circumstances so that
backward compatibility is not broken.
Fixes: 2f6324a3937f ("libbpf: Support shared umems between queues and devices")
Signed-off-by: Magnus Karlsson <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Reported-by: Samanta Navarro <[email protected]>
Signed-off-by: Jakub Wilk <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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When CONFIG_NET is not defined, I hit the following build error:
kernel/trace/bpf_trace.o:(.rodata+0x110): undefined reference to `bpf_prog_test_run_raw_tp'
Commit 1b4d60ec162f ("bpf: Enable BPF_PROG_TEST_RUN for raw_tracepoint")
added test_run support for raw_tracepoint in /kernel/trace/bpf_trace.c.
But the test_run function bpf_prog_test_run_raw_tp is defined in
net/bpf/test_run.c, only available with CONFIG_NET=y.
Adding a CONFIG_NET guard for
.test_run = bpf_prog_test_run_raw_tp;
fixed the above build issue.
Fixes: 1b4d60ec162f ("bpf: Enable BPF_PROG_TEST_RUN for raw_tracepoint")
Signed-off-by: Yonghong Song <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Fix build errors in kernel/bpf/verifier.c when CONFIG_NET is
not enabled.
../kernel/bpf/verifier.c:3995:13: error: ‘btf_sock_ids’ undeclared here (not in a function); did you mean ‘bpf_sock_ops’?
.btf_id = &btf_sock_ids[BTF_SOCK_TYPE_SOCK_COMMON],
../kernel/bpf/verifier.c:3995:26: error: ‘BTF_SOCK_TYPE_SOCK_COMMON’ undeclared here (not in a function); did you mean ‘PTR_TO_SOCK_COMMON’?
.btf_id = &btf_sock_ids[BTF_SOCK_TYPE_SOCK_COMMON],
Fixes: 1df8f55a37bd ("bpf: Enable bpf_skc_to_* sock casting helper to networking prog type")
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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other drivers seems to do something similar
Signed-off-by: Karol Herbst <[email protected]>
Cc: dri-devel <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: [email protected]
Signed-off-by: Dave Airlie <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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Previously the code relied on device->pri to be NULL and to fail probing
later. We really should just return an error inside nvkm_device_ctor for
unsupported GPUs.
Fixes: 24d5ff40a732 ("drm/nouveau/device: rework mmio mapping code to get rid of second map")
Signed-off-by: Karol Herbst <[email protected]>
Cc: dann frazier <[email protected]>
Cc: dri-devel <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: [email protected]
Reviewed-by: Jeremy Cline <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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syzbot reported warning message:
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d6/0x29e lib/dump_stack.c:118
register_lock_class+0xf06/0x1520 kernel/locking/lockdep.c:893
__lock_acquire+0xfd/0x2ae0 kernel/locking/lockdep.c:4320
lock_acquire+0x148/0x720 kernel/locking/lockdep.c:5029
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
exfat_cache_inval_inode+0x30/0x280 fs/exfat/cache.c:226
exfat_evict_inode+0x124/0x270 fs/exfat/inode.c:660
evict+0x2bb/0x6d0 fs/inode.c:576
exfat_fill_super+0x1e07/0x27d0 fs/exfat/super.c:681
get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342
vfs_get_tree+0x88/0x270 fs/super.c:1547
do_new_mount fs/namespace.c:2875 [inline]
path_mount+0x179d/0x29e0 fs/namespace.c:3192
do_mount fs/namespace.c:3205 [inline]
__do_sys_mount fs/namespace.c:3413 [inline]
__se_sys_mount+0x126/0x180 fs/namespace.c:3390
do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
If exfat_read_root() returns an error, spinlock is used in
exfat_evict_inode() without initialization. This patch combines
exfat_cache_init_inode() with exfat_inode_init_once() to initialize
spinlock by slab constructor.
Fixes: c35b6810c495 ("exfat: add exfat cache")
Cc: [email protected] # v5.7+
Reported-by: syzbot <[email protected]>
Signed-off-by: Namjae Jeon <[email protected]>
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Fix missing result check of exfat_build_inode().
And use PTR_ERR_OR_ZERO instead of PTR_ERR.
Signed-off-by: Tetsuhiro Kohada <[email protected]>
Signed-off-by: Namjae Jeon <[email protected]>
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Use per_cpu_ptr_to_phys() instead of virt_to_phys() for per-cpu
address conversion.
In xen_starting_cpu(), per-cpu xen_vcpu_info address is converted
to gfn by virt_to_gfn() macro. However, since the virt_to_gfn(v)
assumes the given virtual address is in linear mapped kernel memory
area, it can not convert the per-cpu memory if it is allocated on
vmalloc area.
This depends on CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK.
If it is enabled, the first chunk of percpu memory is linear mapped.
In the other case, that is allocated from vmalloc area. Moreover,
if the first chunk of percpu has run out until allocating
xen_vcpu_info, it will be allocated on the 2nd chunk, which is
based on kernel memory or vmalloc memory (depends on
CONFIG_NEED_PER_CPU_KM).
Without this fix and kernel configured to use vmalloc area for
the percpu memory, the Dom0 kernel will fail to boot with following
errors.
[ 0.466172] Xen: initializing cpu0
[ 0.469601] ------------[ cut here ]------------
[ 0.474295] WARNING: CPU: 0 PID: 1 at arch/arm64/xen/../../arm/xen/enlighten.c:153 xen_starting_cpu+0x160/0x180
[ 0.484435] Modules linked in:
[ 0.487565] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc4+ #4
[ 0.493895] Hardware name: Socionext Developer Box (DT)
[ 0.499194] pstate: 00000005 (nzcv daif -PAN -UAO BTYPE=--)
[ 0.504836] pc : xen_starting_cpu+0x160/0x180
[ 0.509263] lr : xen_starting_cpu+0xb0/0x180
[ 0.513599] sp : ffff8000116cbb60
[ 0.516984] x29: ffff8000116cbb60 x28: ffff80000abec000
[ 0.522366] x27: 0000000000000000 x26: 0000000000000000
[ 0.527754] x25: ffff80001156c000 x24: fffffdffbfcdb600
[ 0.533129] x23: 0000000000000000 x22: 0000000000000000
[ 0.538511] x21: ffff8000113a99c8 x20: ffff800010fe4f68
[ 0.543892] x19: ffff8000113a9988 x18: 0000000000000010
[ 0.549274] x17: 0000000094fe0f81 x16: 00000000deadbeef
[ 0.554655] x15: ffffffffffffffff x14: 0720072007200720
[ 0.560037] x13: 0720072007200720 x12: 0720072007200720
[ 0.565418] x11: 0720072007200720 x10: 0720072007200720
[ 0.570801] x9 : ffff8000100fbdc0 x8 : ffff800010715208
[ 0.576182] x7 : 0000000000000054 x6 : ffff00001b790f00
[ 0.581564] x5 : ffff800010bbf880 x4 : 0000000000000000
[ 0.586945] x3 : 0000000000000000 x2 : ffff80000abec000
[ 0.592327] x1 : 000000000000002f x0 : 0000800000000000
[ 0.597716] Call trace:
[ 0.600232] xen_starting_cpu+0x160/0x180
[ 0.604309] cpuhp_invoke_callback+0xac/0x640
[ 0.608736] cpuhp_issue_call+0xf4/0x150
[ 0.612728] __cpuhp_setup_state_cpuslocked+0x128/0x2c8
[ 0.618030] __cpuhp_setup_state+0x84/0xf8
[ 0.622192] xen_guest_init+0x324/0x364
[ 0.626097] do_one_initcall+0x54/0x250
[ 0.630003] kernel_init_freeable+0x12c/0x2c8
[ 0.634428] kernel_init+0x1c/0x128
[ 0.637988] ret_from_fork+0x10/0x18
[ 0.641635] ---[ end trace d95b5309a33f8b27 ]---
[ 0.646337] ------------[ cut here ]------------
[ 0.651005] kernel BUG at arch/arm64/xen/../../arm/xen/enlighten.c:158!
[ 0.657697] Internal error: Oops - BUG: 0 [#1] SMP
[ 0.662548] Modules linked in:
[ 0.665676] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 5.9.0-rc4+ #4
[ 0.673398] Hardware name: Socionext Developer Box (DT)
[ 0.678695] pstate: 00000005 (nzcv daif -PAN -UAO BTYPE=--)
[ 0.684338] pc : xen_starting_cpu+0x178/0x180
[ 0.688765] lr : xen_starting_cpu+0x144/0x180
[ 0.693188] sp : ffff8000116cbb60
[ 0.696573] x29: ffff8000116cbb60 x28: ffff80000abec000
[ 0.701955] x27: 0000000000000000 x26: 0000000000000000
[ 0.707344] x25: ffff80001156c000 x24: fffffdffbfcdb600
[ 0.712718] x23: 0000000000000000 x22: 0000000000000000
[ 0.718107] x21: ffff8000113a99c8 x20: ffff800010fe4f68
[ 0.723481] x19: ffff8000113a9988 x18: 0000000000000010
[ 0.728863] x17: 0000000094fe0f81 x16: 00000000deadbeef
[ 0.734245] x15: ffffffffffffffff x14: 0720072007200720
[ 0.739626] x13: 0720072007200720 x12: 0720072007200720
[ 0.745008] x11: 0720072007200720 x10: 0720072007200720
[ 0.750390] x9 : ffff8000100fbdc0 x8 : ffff800010715208
[ 0.755771] x7 : 0000000000000054 x6 : ffff00001b790f00
[ 0.761153] x5 : ffff800010bbf880 x4 : 0000000000000000
[ 0.766534] x3 : 0000000000000000 x2 : 00000000deadbeef
[ 0.771916] x1 : 00000000deadbeef x0 : ffffffffffffffea
[ 0.777304] Call trace:
[ 0.779819] xen_starting_cpu+0x178/0x180
[ 0.783898] cpuhp_invoke_callback+0xac/0x640
[ 0.788325] cpuhp_issue_call+0xf4/0x150
[ 0.792317] __cpuhp_setup_state_cpuslocked+0x128/0x2c8
[ 0.797619] __cpuhp_setup_state+0x84/0xf8
[ 0.801779] xen_guest_init+0x324/0x364
[ 0.805683] do_one_initcall+0x54/0x250
[ 0.809590] kernel_init_freeable+0x12c/0x2c8
[ 0.814016] kernel_init+0x1c/0x128
[ 0.817583] ret_from_fork+0x10/0x18
[ 0.821226] Code: d0006980 f9427c00 cb000300 17ffffea (d4210000)
[ 0.827415] ---[ end trace d95b5309a33f8b28 ]---
[ 0.832076] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 0.839815] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
Signed-off-by: Masami Hiramatsu <[email protected]>
Reviewed-by: Stefano Stabellini <[email protected]>
Link: https://lore.kernel.org/r/160196697165.60224.17470743378683334995.stgit@devnote2
Signed-off-by: Juergen Gross <[email protected]>
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Commit 4976b718c355 ("bpf: Introduce pseudo_btf_id") switched
the order of check_subprogs() and resolve_pseudo_ldimm() in
the verifier. Now an empty prog expects to see the error "last
insn is not an the prog of a single invalid ldimm exit or jmp"
instead, because the check for subprogs comes first. It's now
pointless to validate that half of ldimm64 won't be the last
instruction.
Tested:
# ./test_verifier
Summary: 1129 PASSED, 537 SKIPPED, 0 FAILED
and the full set of bpf selftests.
Fixes: 4976b718c355 ("bpf: Introduce pseudo_btf_id")
Signed-off-by: Hao Luo <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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The macros get_can_dlc() and get_canfd_dlc() are not visible in
userland. As such, type u8 should be preferred over type __u8.
Reference: https://lkml.org/lkml/2020/10/1/708
Signed-off-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Error queue are not yet implemented in CAN-raw sockets.
The problem: a userland call to recvmsg(soc, msg, MSG_ERRQUEUE) on a
CAN-raw socket would unqueue messages from the normal queue without
any kind of error or warning. As such, it prevented CAN drivers from
using the functionalities that relies on the error queue such as
skb_tx_timestamp().
SCM_CAN_RAW_ERRQUEUE is defined as the type for the CAN raw error
queue. SCM stands for "Socket control messages". The name is inspired
from SCM_J1939_ERRQUEUE of include/uapi/linux/can/j1939.h.
Signed-off-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Oliver Hartkopp <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Commit 27cf93863cbc ("MAINTAINERS: Add entry for Microchip MCP25XXFD
SPI-CAN network driver"), added the MCP25XXFD SPI-CAN NETWORK DRIVER
section with the following two file entries:
F: Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
F: drivers/net/can/spi/mcp25xxfd/
Commit 1f0e21a0c065 ("can: mcp251xfd: rename driver files and subdir to
mcp251xfd") renamed the files from mcp25xxfd to mcp251xfd, but missed to
adjust the MAINTAINERS section.
Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:
warning: no file matches F: \
Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
warning: no file matches F: drivers/net/can/spi/mcp25xxfd/
Adjust the MCP251XFD SPI-CAN NETWORK DRIVER section to this driver file
renaming.
Signed-off-by: Lukas Bulwahn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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This patch marks the arrays reg_map_c_can and reg_map_d_can as __maybe_unused,
as they are indeed unused in the c_can driver. This warning shows up, when
compiling the kernel with "W=1":
drivers/net/can/c_can/c_can.c:45:
drivers/net/can/c_can/c_can.h:124:18: warning: ‘reg_map_d_can’ defined but not used [-Wunused-const-variable=]
drivers/net/can/c_can/c_can.h:84:18: warning: ‘reg_map_c_can’ defined but not used [-Wunused-const-variable=]
Link: http://lore.kernel.org/r/[email protected]
Fixes: 33f810097769 ("can: c_can: Move overlay structure to array with offset as index")
Fixes: 69927fccd96b ("can: c_can: Add support for Bosch D_CAN controller")
Signed-off-by: Marc Kleine-Budde <[email protected]>
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'if' statement
This patch fixes the following warning when building the kernel with "W=1":
warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
Link: http://lore.kernel.org/r/[email protected]
Fixes: 03fd3cf5a179 ("can: add driver for Softing card")
Signed-off-by: Marc Kleine-Budde <[email protected]>
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This patch fixes the kernel doc for can_rcv_list_find() which was broken in commit:
3ee6d2bebef8 ("can: af_can: rename find_rcv_list() to can_rcv_list_find()")
while renaming a variable, but forgetting to rename the kernel doc, too.
Link: http://lore.kernel.org/r/[email protected]
Fixes: 3ee6d2bebef8 ("can: af_can: rename find_rcv_list() to can_rcv_list_find()")
Signed-off-by: Marc Kleine-Budde <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Catalin Marinas:
"Fix a kernel panic in the AES crypto code caused by a BR tail call not
matching the target BTI instruction (when branch target identification
is enabled)"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
crypto: arm64: Use x16 with indirect branch to bti_c
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git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull another x86 platform driver fix from Hans de Goede:
"One final pdx86 fix for Tablet Mode reporting regressions (which make
the keyboard and touchpad unusable) on various Asus notebooks.
These regressions were caused by the asus-nb-wmi and the intel-vbtn
drivers both receiving recent patches to start reporting Tablet Mode /
to report it on more models.
Due to a miscommunication between Andy and me, Andy's earlier pull-req
only contained the fix for the intel-vbtn driver and not the fix for
the asus-nb-wmi code.
This fix has been tested as a downstream patch in Fedora kernels for
approx two weeks with no problems being reported"
* tag 'platform-drivers-x86-v5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
platform/x86: asus-wmi: Fix SW_TABLET_MODE always reporting 1 on many different models
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Add an option to count the number of interrupts generated per second and
total number of interrupts during the lifetime of the application for a
given interface. This information is extracted from /proc/interrupts. Since
there is no naming convention across drivers, the user must provide the
string which is specific to their interface in the /proc/interrupts file on
the command line.
Usage:
./xdpsock ... -I <irq_str>
eg. for queue 0 of i40e device eth0:
./xdpsock ... -I i40e-eth0-TxRx-0
Signed-off-by: Ciara Loftus <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Categorise and record syscalls issued in the xdpsock sample app. The
categories recorded are:
rx_empty_polls: polls when the rx ring is empty
fill_fail_polls: polls when failed to get addr from fill ring
copy_tx_sendtos: sendtos issued for tx when copy mode enabled
tx_wakeup_sendtos: sendtos issued when tx ring needs waking up
opt_polls: polls issued since the '-p' flag is set
Print the stats using '-a' on the xdpsock command line.
Signed-off-by: Ciara Loftus <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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New statistics will be added in future commits. In preparation for this,
let's split out the existing statistics into their own struct.
Signed-off-by: Ciara Loftus <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Compiling samples/bpf hits an error related to fallthrough marking.
...
CC samples/bpf/hbm.o
samples/bpf/hbm.c: In function ‘main’:
samples/bpf/hbm.c:486:4: error: ‘fallthrough’ undeclared (first use in this function)
fallthrough;
^~~~~~~~~~~
The "fallthrough" is not defined under tools/include directory.
Rather, it is "__fallthrough" is defined in linux/compiler.h.
Including "linux/compiler.h" and using "__fallthrough" fixed the issue.
Signed-off-by: Yonghong Song <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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With latest llvm trunk, bpf programs under samples/bpf
directory, if using CORE, may experience the following
errors:
LLVM ERROR: Cannot select: intrinsic %llvm.preserve.struct.access.index
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
Stack dump:
0. Program arguments: llc -march=bpf -filetype=obj -o samples/bpf/test_probe_write_user_kern.o
1. Running pass 'Function Pass Manager' on module '<stdin>'.
2. Running pass 'BPF DAG->DAG Pattern Instruction Selection' on function '@bpf_prog1'
#0 0x000000000183c26c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/data/users/yhs/work/llvm-project/llvm/build.cur/install/bin/llc+0x183c26c)
...
#7 0x00000000017c375e (/data/users/yhs/work/llvm-project/llvm/build.cur/install/bin/llc+0x17c375e)
#8 0x00000000016a75c5 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*)
(/data/users/yhs/work/llvm-project/llvm/build.cur/install/bin/llc+0x16a75c5)
#9 0x00000000016ab4f8 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*,
unsigned int) (/data/users/yhs/work/llvm-project/llvm/build.cur/install/bin/llc+0x16ab4f8)
...
Aborted (core dumped) | llc -march=bpf -filetype=obj -o samples/bpf/test_probe_write_user_kern.o
The reason is due to llvm change https://reviews.llvm.org/D87153
where the CORE relocation global generation is moved from the beginning
of target dependent optimization (llc) to the beginning
of target independent optimization (opt).
Since samples/bpf programs did not use vmlinux.h and its clang compilation
uses native architecture, we need to adjust arch triple at opt level
to do CORE relocation global generation properly. Otherwise, the above
error will appear.
This patch fixed the issue by introduce opt and llvm-dis to compilation chain,
which will do proper CORE relocation global generation as well as O2 level
optimization. Tested with llvm10, llvm11 and trunk/llvm12.
Signed-off-by: Yonghong Song <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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bpf_program__set_attach_target(prog, fd, ...) will always fail when
fd = 0 (attach to a kernel symbol) because obj->btf_vmlinux is NULL
and there is no way to set it (at the moment btf_vmlinux is meant
to be temporary storage for use in bpf_object__load_xattr()).
Fix this by using libbpf_find_vmlinux_btf_id().
At some point we may want to opportunistically cache btf_vmlinux
so it can be reused with multiple programs.
Signed-off-by: Luigi Rizzo <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Acked-by: Petar Penkov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Hangbin Liu says:
====================
When a user reuse map fd after creating a map manually and set the
pin_path, then load the object via libbpf. bpf_object__create_maps()
will skip pinning map if map fd exist. Fix it by add moving bpf creation
to else condition and go on checking map pin_path after that.
v3:
for selftest: use CHECK() for bpf_object__open_file() and close map fd on error
v2:
a) close map fd if init map slots failed
b) add bpf selftest for this scenario
====================
Signed-off-by: Alexei Starovoitov <[email protected]>
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This add a test to make sure that we can still pin maps with
reused map fd.
Signed-off-by: Hangbin Liu <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Say a user reuse map fd after creating a map manually and set the
pin_path, then load the object via libbpf.
In libbpf bpf_object__create_maps(), bpf_object__reuse_map() will
return 0 if there is no pinned map in map->pin_path. Then after
checking if map fd exist, we should also check if pin_path was set
and do bpf_map__pin() instead of continue the loop.
Fix it by creating map if fd not exist and continue checking pin_path
after that.
Suggested-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Hangbin Liu <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Previously we forgot to close the map fd if bpf_map_update_elem()
failed during map slot init, which will leak map fd.
Let's move map slot initialization to new function init_map_slots() to
simplify the code. And close the map fd if init slot failed.
Reported-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Hangbin Liu <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Pull drm fixes from Dave Airlie:
"Daniel queued these up last week and I took a long weekend so didn't
get them out, but fixing the OOB access on get font seems like
something we should land and it's cc'ed stable as well.
The other big change is a partial revert for a regression on android
on the clcd fbdev driver, and one other docs fix.
fbdev:
- Re-add FB_ARMCLCD for android
- Fix global-out-of-bounds read in fbcon_get_font()
core:
- Small doc fix"
* tag 'drm-fixes-2020-10-06-1' of git://anongit.freedesktop.org/drm/drm:
drm: drm_dsc.h: fix a kernel-doc markup
Partially revert "video: fbdev: amba-clcd: Retire elder CLCD driver"
fbcon: Fix global-out-of-bounds read in fbcon_get_font()
Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts
fbdev, newport_con: Move FONT_EXTRA_WORDS macros into linux/font.h
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Kernel threads intentionally do CLONE_FS in order to follow any changes
that 'init' does to set up the root directory (or cwd).
It is admittedly a bit odd, but it avoids the situation where 'init'
does some extensive setup to initialize the system environment, and then
we execute a usermode helper program, and it uses the original FS setup
from boot time that may be very limited and incomplete.
[ Both Al Viro and Eric Biederman point out that 'pivot_root()' will
follow the root regardless, since it fixes up other users of root (see
chroot_fs_refs() for details), but overmounting root and doing a
chroot() would not. ]
However, Vegard Nossum noticed that the CLONE_FS not only means that we
follow the root and current working directories, it also means we share
umask with whatever init changed it to. That wasn't intentional.
Just reset umask to the original default (0022) before actually starting
the usermode helper program.
Reported-by: Vegard Nossum <[email protected]>
Cc: Al Viro <[email protected]>
Acked-by: Eric W. Biederman <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Tetsuo Handa reports that splice() can return 0 before the real EOF, if
the data in the splice source pipe is an empty pipe buffer. That empty
pipe buffer case doesn't happen in any normal situation, but you can
trigger it by doing a write to a pipe that fails due to a page fault.
Tetsuo has a test-case to show the behavior:
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
const int fd = open("/tmp/testfile", O_WRONLY | O_CREAT, 0600);
int pipe_fd[2] = { -1, -1 };
pipe(pipe_fd);
write(pipe_fd[1], NULL, 4096);
/* This splice() should wait unless interrupted. */
return !splice(pipe_fd[0], NULL, fd, NULL, 65536, 0);
}
which results in
write(5, NULL, 4096) = -1 EFAULT (Bad address)
splice(4, NULL, 3, NULL, 65536, 0) = 0
and this can confuse splice() users into believing they have hit EOF
prematurely.
The issue was introduced when the pipe write code started pre-allocating
the pipe buffers before copying data from user space.
This is modified verion of Tetsuo's original patch.
Fixes: a194dfe6e6f6 ("pipe: Rearrange sequence in pipe_write() to preallocate slot")
Link:https://lore.kernel.org/linux-fsdevel/[email protected]/
Reported-by: Tetsuo Handa <[email protected]>
Acked-by: Tetsuo Handa <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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The AES code uses a 'br x7' as part of a function called by
a macro. That branch needs a bti_j as a target. This results
in a panic as seen below. Using x16 (or x17) with an indirect
branch keeps the target bti_c.
Bad mode in Synchronous Abort handler detected on CPU1, code 0x34000003 -- BTI
CPU: 1 PID: 265 Comm: cryptomgr_test Not tainted 5.8.11-300.fc33.aarch64 #1
pstate: 20400c05 (nzCv daif +PAN -UAO BTYPE=j-)
pc : aesbs_encrypt8+0x0/0x5f0 [aes_neon_bs]
lr : aesbs_xts_encrypt+0x48/0xe0 [aes_neon_bs]
sp : ffff80001052b730
aesbs_encrypt8+0x0/0x5f0 [aes_neon_bs]
__xts_crypt+0xb0/0x2dc [aes_neon_bs]
xts_encrypt+0x28/0x3c [aes_neon_bs]
crypto_skcipher_encrypt+0x50/0x84
simd_skcipher_encrypt+0xc8/0xe0
crypto_skcipher_encrypt+0x50/0x84
test_skcipher_vec_cfg+0x224/0x5f0
test_skcipher+0xbc/0x120
alg_test_skcipher+0xa0/0x1b0
alg_test+0x3dc/0x47c
cryptomgr_test+0x38/0x60
Fixes: 0e89640b640d ("crypto: arm64 - Use modern annotations for assembly functions")
Cc: <[email protected]> # 5.6.x-
Signed-off-by: Jeremy Linton <[email protected]>
Suggested-by: Dave P Martin <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
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Jakub Kicinski says:
====================
ethtool: allow dumping policies to user space
This series wires up ethtool policies to ops, so they can be
dumped to user space for feature discovery.
First patch wires up GET commands, and second patch wires up SETs.
The policy tables are trimmed to save space and LoC.
Next - take care of linking up nested policies for the header
(which is the policy what we actually care about). And once header
policy is linked make sure that attribute range validation for flags
is done by policy, not a conditions in the code. New type of policy
is needed to validate masks (patch 6).
Netlink as always staying a step ahead of all the other kernel
API interfaces :)
v2:
- merge patches 1 & 2 -> 1
- add patch 3 & 5
- remove .max_attr from struct ethnl_request_ops
====================
Reviewed-by: Johannes Berg <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Perform header flags validation through the policy.
Only pause command supports ETHTOOL_FLAG_STATS. Create a separate
policy to be able to express that in policy dumps to user space.
Note that even though the core will validate the header policy,
it cannot record multiple layers of attributes and we have to
re-parse header sub-attrs. When doing so we could skip attribute
validation, or use most permissive policy. Opt for the former.
We will no longer return the extack cookie for flags but since
we only added first new flag in this release it's not expected
that any user space had a chance to make use of it.
v2: - remove the re-validation in ethnl_parse_header_dev_get()
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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We don't have good validation policy for existing unsigned int attrs
which serve as flags (for new ones we could use NLA_BITFIELD32).
With increased use of policy dumping having the validation be
expressed as part of the policy is important. Add validation
policy in form of a mask of supported/valid bits.
Support u64 in the uAPI to be future-proof, but really for now
the embedded mask member can only hold 32 bits, so anything with
bit 32+ set will always fail validation.
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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