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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull namespaced fscaps fix from James Morris:
"Fix namespaced fscaps when !CONFIG_SECURITY (Serge Hallyn)"
* tag 'fixes-v5.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
[SECURITY] fix namespaced fscaps when !CONFIG_SECURITY
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Pull NFS client fixes from Anna Schumaker:
"Here are a handful more bugfixes for 5.10.
Unfortunately, we found some problems with the new READ_PLUS operation
that aren't easy to fix. We've decided to disable this codepath
through a Kconfig option for now, but a series of patches going into
5.11 will clean up the code and fix the issues at the same time. This
seemed like the best way to go about it.
Summary:
- Fix array overflow when flexfiles mirroring is enabled
- Fix rpcrdma_inline_fixup() crash with new LISTXATTRS
- Fix 5 second delay when doing inter-server copy
- Disable READ_PLUS by default"
* tag 'nfs-for-5.10-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFS: Disable READ_PLUS by default
NFSv4.2: Fix 5 seconds delay when doing inter server copy
NFS: Fix rpcrdma_inline_fixup() crash with new LISTXATTRS operation
pNFS/flexfiles: Fix array overflow when flexfiles mirroring is enabled
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Pull networking fixes from David Miller:
1) IPsec compat fixes, from Dmitry Safonov.
2) Fix memory leak in xfrm_user_policy(). Fix from Yu Kuai.
3) Fix polling in xsk sockets by using sk_poll_wait() instead of
datagram_poll() which keys off of sk_wmem_alloc and such which xsk
sockets do not update. From Xuan Zhuo.
4) Missing init of rekey_data in cfgh80211, from Sara Sharon.
5) Fix destroy of timer before init, from Davide Caratti.
6) Missing CRYPTO_CRC32 selects in ethernet driver Kconfigs, from Arnd
Bergmann.
7) Missing error return in rtm_to_fib_config() switch case, from Zhang
Changzhong.
8) Fix some src/dest address handling in vrf and add a testcase. From
Stephen Suryaputra.
9) Fix multicast handling in Seville switches driven by mscc-ocelot
driver. From Vladimir Oltean.
10) Fix proto value passed to skb delivery demux in udp, from Xin Long.
11) HW pkt counters not reported correctly in enetc driver, from Claudiu
Manoil.
12) Fix deadlock in bridge, from Joseph Huang.
13) Missing of_node_pur() in dpaa2 driver, fromn Christophe JAILLET.
14) Fix pid fetching in bpftool when there are a lot of results, from
Andrii Nakryiko.
15) Fix long timeouts in nft_dynset, from Pablo Neira Ayuso.
16) Various stymmac fixes, from Fugang Duan.
17) Fix null deref in tipc, from Cengiz Can.
18) When mss is biog, coose more resonable rcvq_space in tcp, fromn Eric
Dumazet.
19) Revert a geneve change that likely isnt necessary, from Jakub
Kicinski.
20) Avoid premature rx buffer reuse in various Intel driversm from Björn
Töpel.
21) retain EcT bits during TIS reflection in tcp, from Wei Wang.
22) Fix Tso deferral wrt. cwnd limiting in tcp, from Neal Cardwell.
23) MPLS_OPT_LSE_LABEL attribute is 342 ot 8 bits, from Guillaume Nault
24) Fix propagation of 32-bit signed bounds in bpf verifier and add test
cases, from Alexei Starovoitov.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (81 commits)
selftests: fix poll error in udpgro.sh
selftests/bpf: Fix "dubious pointer arithmetic" test
selftests/bpf: Fix array access with signed variable test
selftests/bpf: Add test for signed 32-bit bound check bug
bpf: Fix propagation of 32-bit signed bounds from 64-bit bounds.
MAINTAINERS: Add entry for Marvell Prestera Ethernet Switch driver
net: sched: Fix dump of MPLS_OPT_LSE_LABEL attribute in cls_flower
net/mlx4_en: Handle TX error CQE
net/mlx4_en: Avoid scheduling restart task if it is already running
tcp: fix cwnd-limited bug for TSO deferral where we send nothing
net: flow_offload: Fix memory leak for indirect flow block
tcp: Retain ECT bits for tos reflection
ethtool: fix stack overflow in ethnl_parse_bitset()
e1000e: fix S0ix flow to allow S0i3.2 subset entry
ice: avoid premature Rx buffer reuse
ixgbe: avoid premature Rx buffer reuse
i40e: avoid premature Rx buffer reuse
igb: avoid transmit queue timeout in xdp path
igb: use xdp_do_flush
igb: skb add metasize for xdp
...
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If generic_drop_inode() returns true, it means iput_final() can evict
this inode regardless of whether it is dirty or not. If we check
I_DONTCACHE in generic_drop_inode(), any inode with this bit set will be
evicted unconditionally. This is not the desired behavior because
I_DONTCACHE only means the inode shouldn't be cached on the LRU list.
As for whether we need to evict this inode, this is what
generic_drop_inode() should do. This patch corrects the usage of
I_DONTCACHE.
This patch was proposed in [1].
[1]: https://lore.kernel.org/linux-fsdevel/[email protected]/
Fixes: dae2f8ed7992 ("fs: Lift XFS_IDONTCACHE to the VFS layer")
Signed-off-by: Hao Li <[email protected]>
Reviewed-by: Dave Chinner <[email protected]>
Reviewed-by: Ira Weiny <[email protected]>
Signed-off-by: Al Viro <[email protected]>
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Alexei Starovoitov says:
====================
pull-request: bpf 2020-12-10
The following pull-request contains BPF updates for your *net* tree.
We've added 21 non-merge commits during the last 12 day(s) which contain
a total of 21 files changed, 163 insertions(+), 88 deletions(-).
The main changes are:
1) Fix propagation of 32-bit signed bounds from 64-bit bounds, from Alexei.
2) Fix ring_buffer__poll() return value, from Andrii.
3) Fix race in lwt_bpf, from Cong.
4) Fix test_offload, from Toke.
5) Various xsk fixes.
Please consider pulling these changes from:
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
Thanks a lot!
Also thanks to reporters, reviewers and testers of commits in this pull-request:
Cong Wang, Hulk Robot, Jakub Kicinski, Jean-Philippe Brucker, John
Fastabend, Magnus Karlsson, Maxim Mikityanskiy, Yonghong Song
====================
Signed-off-by: David S. Miller <[email protected]>
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This new ioctl pair allows two ppp channels to be bridged together:
frames arriving in one channel are transmitted in the other channel
and vice versa.
The practical use for this is primarily to support the L2TP Access
Concentrator use-case. The end-user session is presented as a ppp
channel (typically PPPoE, although it could be e.g. PPPoA, or even PPP
over a serial link) and is switched into a PPPoL2TP session for
transmission to the LNS. At the LNS the PPP session is terminated in
the ISP's network.
When a PPP channel is bridged to another it takes a reference on the
other's struct ppp_file. This reference is dropped when the channels
are unbridged, which can occur either explicitly on userspace calling
the PPPIOCUNBRIDGECHAN ioctl, or implicitly when either channel in the
bridge is unregistered.
In order to implement the channel bridge, struct channel is extended
with a new field, 'bridge', which points to the other struct channel
making up the bridge.
This pointer is RCU protected to avoid adding another lock to the data
path.
To guard against concurrent writes to the pointer, the existing struct
channel lock 'upl' coverage is extended rather than adding a new lock.
The 'upl' lock is used to protect the existing unit pointer. Since the
bridge effectively replaces the unit (they're mutually exclusive for a
channel) it makes coding easier to use the same lock to cover them
both.
Signed-off-by: Tom Parkin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Add the API for getting the domain from a vfio group. This could be used
by the physical device drivers which rely on the vfio/mdev framework for
mediated device user level access. The typical use case like below:
unsigned int pasid;
struct vfio_group *vfio_group;
struct iommu_domain *iommu_domain;
struct device *dev = mdev_dev(mdev);
struct device *iommu_device = mdev_get_iommu_device(dev);
if (!iommu_device ||
!iommu_dev_feature_enabled(iommu_device, IOMMU_DEV_FEAT_AUX))
return -EINVAL;
vfio_group = vfio_group_get_external_user_from_dev(dev);
if (IS_ERR_OR_NULL(vfio_group))
return -EFAULT;
iommu_domain = vfio_group_iommu_domain(vfio_group);
if (IS_ERR_OR_NULL(iommu_domain)) {
vfio_group_put_external_user(vfio_group);
return -EFAULT;
}
pasid = iommu_aux_get_pasid(iommu_domain, iommu_device);
if (pasid < 0) {
vfio_group_put_external_user(vfio_group);
return -EFAULT;
}
/* Program device context with pasid value. */
...
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
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i.MX is a devicetree-only platform now and the existing platform data
support in this driver was only useful for old non-devicetree platforms.
Get rid of the platform data support since it is no longer used.
Signed-off-by: Fabio Estevam <[email protected]>
Reviewed-by: Sascha Hauer <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Some identifiers have different names between their prototypes
and the kernel-doc markup.
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/9ed47a57d12c40e73a9b01612ee119d39baa6236.1603469755.git.mchehab+huawei@kernel.org
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Add the logic in the NAND core to find the right ECC engine depending
on the NAND chip requirements and the user desires. Right now, the
choice may be made between (more will come):
* software Hamming
* software BCH
* on-die (SPI-NAND devices only)
Once the ECC engine has been found, the ECC engine must be
configured.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Before making use of the ECC engines, we must retrieve them. Add the
necessary boilerplate.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Make use of the existing functions taken from the SPI-NAND core to
instantiate an on-die ECC engine specific to the SPI-NAND core. The
next step will be to tweak the core to use this object instead of
calling the helpers directly.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Before making use of the ECC engines, we must retrieve them. Add the
boilerplate for the ones already available: software engines (Hamming
and BCH).
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Let's continue introducing the generic ECC engine abstraction in the
NAND subsystem by instantiating a second ECC engine: software
Hamming.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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There is no reason to always embed the software Hamming ECC engine
implementation. By default it is (with raw NAND), but we can let the
user decide.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Most of the includes are simply useless, drop them.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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This code is meant to be reused by the SPI-NAND core. Now that the
driver has been cleaned and reorganized, use a generic ECC engine
object to store the driver's data instead of accessing members of the
nand_chip structure. This means adding proper init/cleanup helpers.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Prefix by ecc_sw_hamming_ the functions which should be internal only
but are exported for "raw" operations.
Prefix by nand_ecc_sw_hamming_ the other functions which will be used
in the context of the declaration of an Hamming proper ECC engine
object.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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The include file pretends being the header for "ECC algorithm", while
it is just the header for the Hamming implementation. Make this clear
by rewording the sentence.
Do the same with the module description.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Hamming ECC code might be later re-used by the SPI NAND layer.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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nand_ecc_ctrl embeds a private pointer which only has a meaning in the
sunxi driver. This structure will soon be deprecated, but as this
field is actually not needed, let's just drop it.
Cc: Maxime Ripard <[email protected]>
Cc: Chen-Yu Tsai <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Let's continue introducing the generic ECC engine abstraction in the
NAND subsystem by instantiating a first ECC engine: the software
BCH one.
While at it, make a very tidy ecc_sw_bch_init() function and move all
the sanity checks and user input management in
nand_ecc_sw_bch_init_ctx(). This second helper will be called from the
raw RAND core.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]
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Add ECAM-related constants to provide a set of standard constants
defining memory address shift values to the byte-level address that can
be used to access the PCI Express Configuration Space, and then move
native PCI Express controller drivers to use the newly introduced
definitions retiring driver-specific ones.
Refactor pci_ecam_map_bus() function to use newly added constants so
that limits to the bus, device function and offset (now limited to 4K as
per the specification) are in place to prevent the defective or
malicious caller from supplying incorrect configuration offset and thus
targeting the wrong device when accessing extended configuration space.
This refactor also allows for the ".bus_shift" initialisers to be
dropped when the user is not using a custom value as a default value
will be used as per the PCI Express Specification.
Thanks to Qian Cai <[email protected]>, Michael Walle <[email protected]>,
and Vladimir Oltean <[email protected]> for reporting a pci_ecam_create()
issue with .bus_shift and to Vladimir for proposing the fix.
[bhelgaas: incorporate Vladimir's fix, update commit log]
Suggested-by: Bjorn Helgaas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Michael Walle <[email protected]>
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Jon Derrick <[email protected]>
Reviewed-by: Bjorn Helgaas <[email protected]>
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This adds the RPMH clocks present in SM8350 SoC
Reviewed-by: Bjorn Andersson <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: Move sdx55 to the right place]
Signed-off-by: Stephen Boyd <[email protected]>
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This change adds a new kind of core dump mechanism which instead of dumping
entire program segments of the firmware, dumps sections of the remoteproc
memory which are sufficient to allow debugging the firmware. This function
thus uses section headers instead of program headers during creation of the
core dump elf.
Reviewed-by: Bjorn Andersson <[email protected]>
Co-developed-by: Rishabh Bhatnagar <[email protected]>
Signed-off-by: Rishabh Bhatnagar <[email protected]>
Signed-off-by: Siddharth Gupta <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>
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Each remoteproc might have different requirements for coredumps and might
want to choose the type of dumps it wants to collect. This change allows
remoteproc drivers to specify their own custom dump function to be executed
in place of rproc_coredump. If the coredump op is not specified by the
remoteproc driver it will be set to rproc_coredump by default.
Reviewed-by: Bjorn Andersson <[email protected]>
Signed-off-by: Siddharth Gupta <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>
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Recently syzbot reported[0] that there is a deadlock amongst the users
of exec_update_mutex. The problematic lock ordering found by lockdep
was:
perf_event_open (exec_update_mutex -> ovl_i_mutex)
chown (ovl_i_mutex -> sb_writes)
sendfile (sb_writes -> p->lock)
by reading from a proc file and writing to overlayfs
proc_pid_syscall (p->lock -> exec_update_mutex)
While looking at possible solutions it occured to me that all of the
users and possible users involved only wanted to state of the given
process to remain the same. They are all readers. The only writer is
exec.
There is no reason for readers to block on each other. So fix
this deadlock by transforming exec_update_mutex into a rw_semaphore
named exec_update_lock that only exec takes for writing.
Cc: Jann Horn <[email protected]>
Cc: Vasiliy Kulikov <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Bernd Edlinger <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Christopher Yeoh <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Sargun Dhillon <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Fixes: eea9673250db ("exec: Add exec_update_mutex to replace cred_guard_mutex")
[0] https://lkml.kernel.org/r/[email protected]
Reported-by: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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Fix incorrect type of max_entries in UVERBS_METHOD_QUERY_GID_TABLE -
max_entries is of type size_t although it can take negative values.
The following static check revealed it:
drivers/infiniband/core/uverbs_std_types_device.c:338 ib_uverbs_handler_UVERBS_METHOD_QUERY_GID_TABLE() warn: 'max_entries' unsigned <= 0
Fixes: 9f85cbe50aa0 ("RDMA/uverbs: Expose the new GID query API to user space")
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Avihai Horon <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
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When discussing[1] exec and posix file locks it was realized that none
of the callers of get_files_struct fundamentally needed to call
get_files_struct, and that by switching them to helper functions
instead it will both simplify their code and remove unnecessary
increments of files_struct.count. Those unnecessary increments can
result in exec unnecessarily unsharing files_struct which breaking
posix locks, and it can result in fget_light having to fallback to
fget reducing system performance.
Now that get_files_struct has no more users and can not cause the
problems for posix file locking and fget_light remove get_files_struct
so that it does not gain any new users.
[1] https://lkml.kernel.org/r/[email protected]
Suggested-by: Oleg Nesterov <[email protected]>
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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The function close_fd_get_file is explicitly a variant of
__close_fd[1]. Now that __close_fd has been renamed close_fd, rename
close_fd_get_file to be consistent with close_fd.
When __alloc_fd, __close_fd and __fd_install were introduced the
double underscore indicated that the function took a struct
files_struct parameter. The function __close_fd_get_file never has so
the naming has always been inconsistent. This just cleans things up
so there are not any lingering mentions or references __close_fd left
in the code.
[1] 80cd795630d6 ("binder: fix use-after-free due to ksys_close() during fdget()")
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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Now that ksys_close is exactly identical to close_fd replace
the one caller of ksys_close with close_fd.
[1] https://lkml.kernel.org/r/[email protected]
Suggested-by: Christoph Hellwig <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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The function __close_fd was added to support binder[1]. Now that
binder has been fixed to no longer need __close_fd[2] all calls
to __close_fd pass current->files.
Therefore transform the files parameter into a local variable
initialized to current->files, and rename __close_fd to close_fd to
reflect this change, and keep it in sync with the similar changes to
__alloc_fd, and __fd_install.
This removes the need for callers to care about the extra care that
needs to be take if anything except current->files is passed, by
limiting the callers to only operation on current->files.
[1] 483ce1d4b8c3 ("take descriptor-related part of close() to file.c")
[2] 44d8047f1d87 ("binder: use standard functions to allocate fds")
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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The function __alloc_fd was added to support binder[1]. With binder
fixed[2] there are no more users.
As alloc_fd just calls __alloc_fd with "files=current->files",
merge them together by transforming the files parameter into a
local variable initialized to current->files.
[1] dcfadfa4ec5a ("new helper: __alloc_fd()")
[2] 44d8047f1d87 ("binder: use standard functions to allocate fds")
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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The function __fd_install was added to support binder[1]. With binder
fixed[2] there are no more users.
As fd_install just calls __fd_install with "files=current->files",
merge them together by transforming the files parameter into a
local variable initialized to current->files.
[1] f869e8a7f753 ("expose a low-level variant of fd_install() for binder")
[2] 44d8047f1d87 ("binder: use standard functions to allocate fds")
Acked-by: Christian Brauner <[email protected]>
v1:https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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As a companion to fget_task and task_lookup_fd_rcu implement
task_lookup_next_fd_rcu that will return the struct file for the first
file descriptor number that is equal or greater than the fd argument
value, or NULL if there is no such struct file.
This allows file descriptors of foreign processes to be iterated
through safely, without needed to increment the count on files_struct.
Some concern[1] has been expressed that this function takes the task_lock
for each iteration and thus for each file descriptor. This place
where this function will be called in a commonly used code path is for
listing /proc/<pid>/fd. I did some small benchmarks and did not see
any measurable performance differences. For ordinary users ls is
likely to stat each of the directory entries and tid_fd_mode called
from tid_fd_revalidae has always taken the task lock for each file
descriptor. So this does not look like it will be a big change in
practice.
At some point is will probably be worth changing put_files_struct to
free files_struct after an rcu grace period so that task_lock won't be
needed at all.
[1] https://lkml.kernel.org/r/[email protected]
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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As a companion to lookup_fd_rcu implement task_lookup_fd_rcu for
querying an arbitrary process about a specific file.
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/20200818103713.aw46m7vprsy4vlve@wittgenstein
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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Also remove the confusing comment about checking if a fd exists. I
could not find one instance in the entire kernel that still matches
the description or the reason for the name fcheck.
The need for better names became apparent in the last round of
discussion of this set of changes[1].
[1] https://lkml.kernel.org/r/CAHk-=wj8BQbgJFLa+J0e=iT-1qpmCRTbPAJ8gd6MJQ=kbRPqyQ@mail.gmail.com
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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This change renames fcheck_files to files_lookup_fd_rcu. All of the
remaining callers take the rcu_read_lock before calling this function
so the _rcu suffix is appropriate. This change also tightens up the
debug check to verify that all callers hold the rcu_read_lock.
All callers that used to call files_check with the files->file_lock
held have now been changed to call files_lookup_fd_locked.
This change of name has helped remind me of which locks and which
guarantees are in place helping me to catch bugs later in the
patchset.
The need for better names became apparent in the last round of
discussion of this set of changes[1].
[1] https://lkml.kernel.org/r/CAHk-=wj8BQbgJFLa+J0e=iT-1qpmCRTbPAJ8gd6MJQ=kbRPqyQ@mail.gmail.com
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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To make it easy to tell where files->file_lock protection is being
used when looking up a file create files_lookup_fd_locked. Only allow
this function to be called with the file_lock held.
Update the callers of fcheck and fcheck_files that are called with the
files->file_lock held to call files_lookup_fd_locked instead.
Hopefully this makes it easier to quickly understand what is going on.
The need for better names became apparent in the last round of
discussion of this set of changes[1].
[1] https://lkml.kernel.org/r/CAHk-=wj8BQbgJFLa+J0e=iT-1qpmCRTbPAJ8gd6MJQ=kbRPqyQ@mail.gmail.com
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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The function fcheck despite it's comment is poorly named
as it has no callers that only check it's return value.
All of fcheck's callers use the returned file descriptor.
The same is true for fcheck_files and __fcheck_files.
A new less confusing name is needed. In addition the names
of these functions are confusing as they do not report
the kind of locks that are needed to be held when these
functions are called making error prone to use them.
To remedy this I am making the base functio name lookup_fd
and will and prefixes and sufficies to indicate the rest
of the context.
Name the function (previously called __fcheck_files) that proceeds
from a struct files_struct, looks up the struct file of a file
descriptor, and requires it's callers to verify all of the appropriate
locks are held files_lookup_fd_raw.
The need for better names became apparent in the last round of
discussion of this set of changes[1].
[1] https://lkml.kernel.org/r/CAHk-=wj8BQbgJFLa+J0e=iT-1qpmCRTbPAJ8gd6MJQ=kbRPqyQ@mail.gmail.com
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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Now that exec no longer needs to restore the previous value of current->files
on error there are no more callers of reset_files_struct so remove it.
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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Now that exec no longer needs to return the unshared files to their
previous value there is no reason to return displaced.
Instead when unshare_fd creates a copy of the file table, call
put_files_struct before returning from unshare_files.
Acked-by: Christian Brauner <[email protected]>
v1: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
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There are at least few existing users of the proposed API which
retrieves either MEM or IO resource from platform device.
Make it common to utilize in the existing and new users.
Cc: Eric Auger <[email protected]>
Cc: Alex Williamson <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Peng Hao <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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The driver core ignores the return value of the remove callback, so
don't give siox drivers the chance to provide a value.
All siox drivers only allocate devm-managed resources in
.probe, so there is no .remove callback to fix.
Tested-by: Thorsten Scherer <[email protected]>
Acked-by: Thorsten Scherer <[email protected]>
Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Boyd <[email protected]>:
Collected patches from the two series below and associated tags so they
can be merged in one pile through the spi tree. Merry December!
SPI: https://lore.kernel.org/r/[email protected]
cros-ec: https://lore.kernel.org/r/[email protected]
Cc: Akash Asthana <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Gwendal Grignou <[email protected]>
Cc: Douglas Anderson <[email protected]>
Cc: Alexandru M Stan <[email protected]>
Stephen Boyd (3):
platform/chrome: cros_ec_spi: Don't overwrite spi::mode
platform/chrome: cros_ec_spi: Drop bits_per_word assignment
spi: spi-geni-qcom: Use the new method of gpio CS control
drivers/platform/chrome/cros_ec_spi.c | 2 --
drivers/spi/spi-geni-qcom.c | 1 +
2 files changed, 1 insertion(+), 2 deletions(-)
base-commit: b65054597872ce3aefbc6a666385eabdf9e288da
--
https://chromeos.dev
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Add a missing structure comment for the recently
added @list member.
Cc: Stephen Rothwell <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Christian König <[email protected]>
Fixes: 8935ff00e3b1 ("drm/scheduler: "node" --> "list"")
Reported-by: Stephen Rothwell <[email protected]>
Signed-off-by: Luben Tuikov <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Christian König <[email protected]>
Link: https://patchwork.freedesktop.org/patch/406546/
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Add new shutdown() method. Use it in the standard driver model style.
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Hsin-Hsiung Wang <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Add a helper for calculating the rc buffer size from the DCPD offsets
DP_DSC_RC_BUF_BLK_SIZE and DP_DSC_RC_BUF_SIZE.
Cc: Alex Deucher <[email protected]>
Cc: Harry Wentland <[email protected]>
Cc: Manasi Navare <[email protected]>
Cc: Vandita Kulkarni <[email protected]>
Reviewed-by: Vandita Kulkarni <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/6c6aee22740fe7a8cf2b8e768bfda378850cf59a.1607429866.git.jani.nikula@intel.com
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When CAN_ISOTP_SF_BROADCAST is set in the CAN_ISOTP_OPTS flags the CAN_ISOTP
socket is switched into functional addressing mode, where only single frame
(SF) protocol data units can be send on the specified CAN interface and the
given tp.tx_id after bind().
In opposite to normal and extended addressing this socket does not register a
CAN-ID for reception which would be needed for a 1-to-1 ISOTP connection with a
segmented bi-directional data transfer.
Sending SFs on this socket is therefore a TX-only 'broadcast' operation.
Signed-off-by: Oliver Hartkopp <[email protected]>
Signed-off-by: Thomas Wagner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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git://people.freedesktop.org/~agd5f/linux into drm-next
amd-drm-next-5.11-2020-12-09:
amdgpu:
- SR-IOV fixes
- Navy Flounder updates
- Sienna Cichlid updates
- Dimgrey Cavefish updates
- Vangogh updates
- Misc SMU fixes
- Misc display fixes
- Last big hunk of W=1 warning fixes
- Cursor validation fixes
- CI BACO updates
From: Alex Deucher <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Dave Airlie <[email protected]>
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