30 Oct, 2020
1 commit
-
There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arraysSigned-off-by: Gustavo A. R. Silva
28 Jul, 2020
2 commits
-
For bitmasks printing values in hex is more convenient.
Prefix with `0x` to make it clear, that it’s a hex value, and pad it
out.Using the helper for `amdgpu.ppfeaturemask`, it will look like below.
Before:
$ more /sys/module/amdgpu/parameters/ppfeaturemask
4294950911After:
$ more /sys/module/amdgpu/parameters/ppfeaturemask
0xffffbfffCc: linux-kernel@vger.kernel.org
Cc: amd-gfx@lists.freedesktop.org
Signed-off-by: Paul Menzel
Acked-by: Linus Torvalds
Reviewed-by: Christian König
Signed-off-by: Christian König
Link: https://patchwork.freedesktop.org/patch/374726/ -
The second and third arguments are aligned with tabs, so do the same for
the fourth.Cc: linux-kernel@vger.kernel.org
Signed-off-by: Paul Menzel
Reviewed-by: Christian König
Signed-off-by: Christian König
Link: https://lore.kernel.org/patchwork/patch/1267600/
20 Aug, 2019
1 commit
-
Provided an annotation for module parameters that specify hardware
parameters (such as io ports, iomem addresses, irqs, dma channels, fixed
dma buffers and other types).Suggested-by: Alan Cox
Signed-off-by: David Howells
Signed-off-by: Matthew Garrett
Reviewed-by: Kees Cook
Cc: Jessica Yu
Signed-off-by: James Morris
31 May, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1334 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Richard Fontana
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman
12 Apr, 2018
1 commit
-
As using an unsafe module parameter is, by its very definition, an
expected user action, emitting a warning is overkill. Nothing has yet
gone wrong, and we add a taint flag for any future oops should something
actually go wrong. So instead of having a user controllable pr_warn,
downgrade it to a pr_notice for "a normal, but significant condition".We make use of unsafe kernel parameters in igt
(https://cgit.freedesktop.org/drm/igt-gpu-tools/) (we have not yet
succeeded in removing all such debugging options), which generates a
warning and taints the kernel. The warning is unhelpful as we then need
to filter it out again as we check that every test themselves do not
provoke any kernel warnings.Link: http://lkml.kernel.org/r/20180226151919.9674-1-chris@chris-wilson.co.uk
Fixes: 91f9d330cc14 ("module: make it possible to have unsafe, tainting module params")
Signed-off-by: Chris Wilson
Acked-by: Jani Nikula
Reviewed-by: Andrew Morton
Cc: Rusty Russell
Cc: Jean Delvare
Cc: Li Zhong
Cc: Petri Latvala
Cc: Daniel Vetter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Oct, 2017
4 commits
-
Align the parameters passed to STANDARD_PARAM_DEF for clarity.
Link: http://lkml.kernel.org/r/20170928162728.756143cc@endymion
Signed-off-by: Jean Delvare
Suggested-by: Ingo Molnar
Acked-by: Ingo Molnar
Cc: Baoquan He
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Function param_attr_show could overflow the buffer it is operating on.
The buffer size is PAGE_SIZE, and the string returned by
attribute->param->ops->get is generated by scnprintf(buffer, PAGE_SIZE,
...) so it could be PAGE_SIZE - 1 long, with the terminating '\0' at the
very end of the buffer. Calling strcat(..., "\n") on this isn't safe, as
the '\0' will be replaced by '\n' (OK) and then another '\0' will be added
past the end of the buffer (not OK.)Simply add the trailing '\n' when writing the attribute contents to the
buffer originally. This is safe, and also faster.Credits to Teradata for discovering this issue.
Link: http://lkml.kernel.org/r/20170928162602.60c379c7@endymion
Signed-off-by: Jean Delvare
Acked-by: Ingo Molnar
Cc: Baoquan He
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The length parameter of strlcpy() is supposed to reflect the size of the
target buffer, not of the source string. Harmless in this case as the
buffer is PAGE_SIZE long and the source string is always much shorter than
this, but conceptually wrong, so let's fix it.Link: http://lkml.kernel.org/r/20170928162515.24846b4f@endymion
Signed-off-by: Jean Delvare
Acked-by: Ingo Molnar
Cc: Baoquan He
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This parameter is named kp, so the documentation should use that.
Fixes: 9b473de87209 ("param: Fix duplicate module prefixes")
Link: http://lkml.kernel.org/r/20170919142656.64aea59e@endymion
Signed-off-by: Jean Delvare
Acked-by: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Apr, 2017
1 commit
-
next_arg() will be used to parse boot parameters in the x86/boot/compressed code,
so move it to lib/cmdline.c for better code reuse.No change in functionality.
Signed-off-by: Baoquan He
Cc: Andrew Morton
Cc: Gustavo Padovan
Cc: Jens Axboe
Cc: Jessica Yu
Cc: Johannes Berg
Cc: Josh Triplett
Cc: Larry Finger
Cc: Linus Torvalds
Cc: Niklas Söderlund
Cc: Peter Zijlstra
Cc: Petr Mladek
Cc: Rasmus Villemoes
Cc: Thomas Gleixner
Cc: dan.j.williams@intel.com
Cc: dave.jiang@intel.com
Cc: dyoung@redhat.com
Cc: keescook@chromium.org
Cc: zijun_hu
Link: http://lkml.kernel.org/r/1492436099-4017-2-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar
10 Nov, 2015
1 commit
-
Pull module updates from Rusty Russell:
"Nothing exciting, minor tweaks and cleanups"* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
scripts: [modpost] add new sections to white list
modpost: Add flag -E for making section mismatches fatal
params: don't ignore the rest of cmdline if parse_one() fails
modpost: abort if a module symbol is too long
07 Nov, 2015
1 commit
-
Change the param_free_charp() function from static to exported.
It is used by zswap in the next patch ("zswap: use charp for zswap param
strings").Signed-off-by: Dan Streetman
Acked-by: Rusty Russell
Cc: Seth Jennings
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Aug, 2015
1 commit
-
parse_args() just aborts after it hits an error, so other args
at the same initcall level are simply ignored. This can lead to
other hard-to-understand problems, for example my testing machine
panics during the boot if I pass "locktorture.verbose=true".Change parse_args() to save the err code for return and continue.
Signed-off-by: Oleg Nesterov
Signed-off-by: Rusty Russell
02 Jul, 2015
1 commit
-
Pull module updates from Rusty Russell:
"Main excitement here is Peter Zijlstra's lockless rbtree optimization
to speed module address lookup. He found some abusers of the module
lock doing that too.A little bit of parameter work here too; including Dan Streetman's
breaking up the big param mutex so writing a parameter can load
another module (yeah, really). Unfortunately that broke the usual
suspects, !CONFIG_MODULES and !CONFIG_SYSFS, so those fixes were
appended too"* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (26 commits)
modules: only use mod->param_lock if CONFIG_MODULES
param: fix module param locks when !CONFIG_SYSFS.
rcu: merge fix for Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()
module: add per-module param_lock
module: make perm const
params: suppress unused variable error, warn once just in case code changes.
modules: clarify CONFIG_MODULE_COMPRESS help, suggest 'N'.
kernel/module.c: avoid ifdefs for sig_enforce declaration
kernel/workqueue.c: remove ifdefs over wq_power_efficient
kernel/params.c: export param_ops_bool_enable_only
kernel/params.c: generalize bool_enable_only
kernel/module.c: use generic module param operaters for sig_enforce
kernel/params: constify struct kernel_param_ops uses
sysfs: tightened sysfs permission checks
module: Rework module_addr_{min,max}
module: Use __module_address() for module_address_lookup()
module: Make the mod_tree stuff conditional on PERF_EVENTS || TRACING
module: Optimize __module_address() using a latched RB-tree
rbtree: Implement generic latch_tree
seqlock: Introduce raw_read_seqcount_latch()
...
28 Jun, 2015
2 commits
-
Signed-off-by: Stephen Rothwell
Signed-off-by: Rusty Russell -
As Dan Streetman points out, the entire point of locking for is to
stop sysfs accesses, so they're elided entirely in the !SYSFS case.Reported-by: Stephen Rothwell
Signed-off-by: Rusty Russell
23 Jun, 2015
3 commits
-
Add a "param_lock" mutex to each module, and update params.c to use
the correct built-in or module mutex while locking kernel params.
Remove the kparam_block_sysfs_r/w() macros, replace them with direct
calls to kernel_param_[un]lock(module).The kernel param code currently uses a single mutex to protect
modification of any and all kernel params. While this generally works,
there is one specific problem with it; a module callback function
cannot safely load another module, i.e. with request_module() or even
with indirect calls such as crypto_has_alg(). If the module to be
loaded has any of its params configured (e.g. with a /etc/modprobe.d/*
config file), then the attempt will result in a deadlock between the
first module param callback waiting for modprobe, and modprobe trying to
lock the single kernel param mutex to set the new module's param.This fixes that by using per-module mutexes, so that each individual module
is protected against concurrent changes in its own kernel params, but is
not blocked by changes to other module params. All built-in modules
continue to use the built-in mutex, since they will always be loaded at
runtime and references (e.g. request_module(), crypto_has_alg()) to them
will never cause load-time param changing.This also simplifies the interface used by modules to block sysfs access
to their params; while there are currently functions to block and unblock
sysfs param access which are split up by read and write and expect a single
kernel param to be passed, their actual operation is identical and applies
to all params, not just the one passed to them; they simply lock and unlock
the global param mutex. They are replaced with direct calls to
kernel_param_[un]lock(THIS_MODULE), which locks THIS_MODULE's param_lock, or
if the module is built-in, it locks the built-in mutex.Suggested-by: Rusty Russell
Signed-off-by: Dan Streetman
Signed-off-by: Rusty Russell -
Change the struct kernel_param.perm field to a const, as it should never
be changed.Signed-off-by: Dan Streetman
Signed-off-by: Rusty Russell (cut from larger patch) -
It shouldn't fail due to OOM (it's boot time), and already warns if we
get two identical names. But you never know what the future holds, and
WARN_ON_ONCE() keeps gcc happy with minimal code.Reported-by: Louis Langholtz
Acked-by: Tejun Heo
Signed-off-by: Rusty Russell
28 May, 2015
3 commits
-
This will grant access to this helper to code built as modules.
Cc: Rusty Russell
Cc: David Howells
Cc: Ming Lei
Cc: Seth Forshee
Cc: Kyle McMartin
Signed-off-by: Luis R. Rodriguez
Signed-off-by: Rusty Russell -
This takes out the bool_enable_only implementation from
the module loading code and generalizes it so that others
can make use of it.Cc: Rusty Russell
Cc: Jani Nikula
Cc: Andrew Morton
Cc: Kees Cook
Cc: Tejun Heo
Cc: Ingo Molnar
Cc: linux-kernel@vger.kernel.org
Cc: cocci@systeme.lip6.fr
Signed-off-by: Luis R. Rodriguez
Signed-off-by: Rusty Russell -
Most code already uses consts for the struct kernel_param_ops,
sweep the kernel for the last offending stragglers. Other than
include/linux/moduleparam.h and kernel/params.c all other changes
were generated with the following Coccinelle SmPL patch. Merge
conflicts between trees can be handled with Coccinelle.In the future git could get Coccinelle merge support to deal with
patch --> fail --> grammar --> Coccinelle --> new patch conflicts
automatically for us on patches where the grammar is available and
the patch is of high confidence. Consider this a feature request.Test compiled on x86_64 against:
* allnoconfig
* allmodconfig
* allyesconfig@ const_found @
identifier ops;
@@const struct kernel_param_ops ops = {
};@ const_not_found depends on !const_found @
identifier ops;
@@-struct kernel_param_ops ops = {
+const struct kernel_param_ops ops = {
};Generated-by: Coccinelle SmPL
Cc: Rusty Russell
Cc: Junio C Hamano
Cc: Andrew Morton
Cc: Kees Cook
Cc: Tejun Heo
Cc: Ingo Molnar
Cc: cocci@systeme.lip6.fr
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez
Signed-off-by: Rusty Russell
20 May, 2015
1 commit
-
This adds an extra argument onto parse_params() to be used
as a way to make the unused callback a bit more useful and
generic by allowing the caller to pass on a data structure
of its choice. An example use case is to allow us to easily
make module parameters for every module which we will do
next.@ parse @
identifier name, args, params, num, level_min, level_max;
identifier unknown, param, val, doing;
type s16;
@@
extern char *parse_args(const char *name,
char *args,
const struct kernel_param *params,
unsigned num,
s16 level_min,
s16 level_max,
+ void *arg,
int (*unknown)(char *param, char *val,
const char *doing
+ , void *arg
));@ parse_mod @
identifier name, args, params, num, level_min, level_max;
identifier unknown, param, val, doing;
type s16;
@@
char *parse_args(const char *name,
char *args,
const struct kernel_param *params,
unsigned num,
s16 level_min,
s16 level_max,
+ void *arg,
int (*unknown)(char *param, char *val,
const char *doing
+ , void *arg
))
{
...
}@ parse_args_found @
expression R, E1, E2, E3, E4, E5, E6;
identifier func;
@@(
R =
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
func);
|
R =
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
&func);
|
R =
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
NULL);
|
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
func);
|
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
&func);
|
parse_args(E1, E2, E3, E4, E5, E6,
+ NULL,
NULL);
)@ parse_args_unused depends on parse_args_found @
identifier parse_args_found.func;
@@int func(char *param, char *val, const char *unused
+ , void *arg
)
{
...
}@ mod_unused depends on parse_args_found @
identifier parse_args_found.func;
expression A1, A2, A3;
@@- func(A1, A2, A3);
+ func(A1, A2, A3, NULL);Generated-by: Coccinelle SmPL
Cc: cocci@systeme.lip6.fr
Cc: Tejun Heo
Cc: Arjan van de Ven
Cc: Greg Kroah-Hartman
Cc: Rusty Russell
Cc: Christoph Hellwig
Cc: Felipe Contreras
Cc: Ewan Milne
Cc: Jean Delvare
Cc: Hannes Reinecke
Cc: Jani Nikula
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Tejun Heo
Acked-by: Rusty Russell
Signed-off-by: Luis R. Rodriguez
Signed-off-by: Greg Kroah-Hartman
15 Apr, 2015
1 commit
-
When starting kernel with arguments like:
init=/bin/sh -c "echo arguments"
the trailing double quote is not removed which results in following command
being executed:
/bin/sh -c 'echo arguments"'Reported-by: Arthur Gautier
Signed-off-by: Rusty Russell
20 Jan, 2015
1 commit
-
ignore_lockdep is uninitialized, and sysfs_attr_init() doesn't initialize
it, so memset to 0.Reported-by: Huang Ying
Cc: Eric W. Biederman
Signed-off-by: Rusty Russell
23 Dec, 2014
1 commit
-
I rebased Kees' 'param: do not set store func without write perm'
on top of my 'params: cleanup sysfs allocation'. However, my patch
uses krealloc which doesn't zero memory, leaving .store unset.Reported-by: Sasha Levin
Cc: Kees Cook
Signed-off-by: Rusty Russell
18 Dec, 2014
1 commit
-
When a module_param is defined without DAC write permissions, it can
still be changed at runtime and updated. Drivers using a 0444 permission
may be surprised that these values can still be changed.For drivers that want to allow updates, any S_IW* flag will set the
"store" function as before. Drivers without S_IW* flags will have the
"store" function unset, unforcing a read-only value. Drivers that wish
neither "store" nor "get" can continue to use "0" for perms to stay out
of sysfs entirely.Old behavior:
# cd /sys/module/snd/parameters
# ls -l
total 0
-r--r--r-- 1 root root 4096 Dec 11 13:55 cards_limit
-r--r--r-- 1 root root 4096 Dec 11 13:55 major
-r--r--r-- 1 root root 4096 Dec 11 13:55 slots
# cat major
116
# echo -1 > major
-bash: major: Permission denied
# chmod u+w major
# echo -1 > major
# cat major
-1New behavior:
...
# chmod u+w major
# echo -1 > major
-bash: echo: write error: Input/output errorSigned-off-by: Kees Cook
Signed-off-by: Rusty Russell
11 Nov, 2014
1 commit
-
commit 63662139e519ce06090b2759cf4a1d291b9cc0e2 attempted to patch a
leak (which would only happen on OOM, ie. never), but it didn't quite
work.This rewrites the code to be as simple as possible. add_sysfs_param()
adds a parameter. If it fails, it's the caller's responsibility to
clean up the parameters which already exist.The kzalloc-then-always-krealloc pattern is perhaps overly simplistic,
but this code has clearly confused people. It worked on me...Signed-off-by: Rusty Russell
14 Oct, 2014
1 commit
-
Consolidate the various external const and non-const declarations of
__start___param[] and __stop___param in . This
requires making a few struct kernel_param pointers in kernel/params.c
const.Signed-off-by: Geert Uytterhoeven
Acked-by: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Aug, 2014
3 commits
-
This means every set op doesn't need to call it, and it can move into
params.c.Signed-off-by: Rusty Russell
-
Add flags field to struct kernel_params, and add the first flag: unsafe
parameter. Modifying a kernel parameter with the unsafe flag set, either
via the kernel command line or sysfs, will issue a warning and taint the
kernel.Cc: Rusty Russell
Cc: Jean Delvare
Cc: Andrew Morton
Cc: Li Zhong
Cc: Jon Mason
Cc: Daniel Vetter
Signed-off-by: Jani Nikula
Signed-off-by: Rusty Russell -
Make it clear this is about kernel_param_ops, not kernel_param (which
will soon have a flags field of its own). No functional changes.Cc: Rusty Russell
Cc: Jean Delvare
Cc: Andrew Morton
Cc: Li Zhong
Cc: Jon Mason
Cc: Daniel Vetter
Signed-off-by: Jani Nikula
Signed-off-by: Rusty Russell
18 Jul, 2014
1 commit
-
Some driver might want to pass in an 64-bit value, so introduce
a module param type 'ullong'.Signed-off-by: Hannes Reinecke
Reviewed-by: Christoph Hellwig
Reviewed-by: Ewan Milne
Acked-by: Rusty Russell
Signed-off-by: Christoph Hellwig
28 Apr, 2014
1 commit
-
The kernel passes any args it doesn't need through to init, except it
assumes anything containing '.' belongs to the kernel (for a module).
This change means all users can clearly distinguish which arguments
are for init.For example, the kernel uses debug ("dee-bug") to mean log everything to
the console, where systemd uses the debug from the Scandinavian "day-boog"
meaning "fail to boot". If a future versions uses argv[] instead of
reading /proc/cmdline, this confusion will be avoided.eg: test 'FOO="this is --foo"' -- 'systemd.debug="true true true"'
Gives:
argv[0] = '/debug-init'
argv[1] = 'test'
argv[2] = 'systemd.debug=true true true'
envp[0] = 'HOME=/'
envp[1] = 'TERM=linux'
envp[2] = 'FOO=this is --foo'Signed-off-by: Rusty Russell
04 Dec, 2013
1 commit
-
We are repeating the functionality of kstrtol in param_set_long, and the
same for kstrtoint. We can get rid of the extra code by using the right
functions.Signed-off-by: Felipe Contreras
Signed-off-by: Rusty Russell
29 Sep, 2013
1 commit
-
Commit 6072ddc8520b ("kernel: replace strict_strto*() with kstrto*()")
broke the handling of signed integer types, fix it.Signed-off-by: Jean Delvare
Reported-by: Christian Kujau
Tested-by: Christian Kujau
Cc: Jingoo Han
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Sep, 2013
1 commit
-
The usage of strict_strto*() is not preferred, because strict_strto*() is
obsolete. Thus, kstrto*() should be used.Signed-off-by: Jingoo Han
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Sep, 2013
1 commit
-
DEBUG_KOBJECT_RELEASE helps to find the issue attached below.
After some investigation, it seems the reason is:
The mod->mkobj.kobj(ffffffffa01600d0 below) is freed together with mod
itself in free_module(). However, its children still hold references to
it, as the delay caused by DEBUG_KOBJECT_RELEASE. So when the
child(holders below) tries to decrease the reference count to its parent
in kobject_del(), BUG happens as it tries to access already freed memory.This patch tries to fix it by waiting for the mod->mkobj.kobj to be
really released in the module removing process (and some error code
paths).[ 1844.175287] kobject: 'holders' (ffff88007c1f1600): kobject_release, parent ffffffffa01600d0 (delayed)
[ 1844.178991] kobject: 'notes' (ffff8800370b2a00): kobject_release, parent ffffffffa01600d0 (delayed)
[ 1845.180118] kobject: 'holders' (ffff88007c1f1600): kobject_cleanup, parent ffffffffa01600d0
[ 1845.182130] kobject: 'holders' (ffff88007c1f1600): auto cleanup kobject_del
[ 1845.184120] BUG: unable to handle kernel paging request at ffffffffa01601d0
[ 1845.185026] IP: [] kobject_put+0x11/0x60
[ 1845.185026] PGD 1a13067 PUD 1a14063 PMD 7bd30067 PTE 0
[ 1845.185026] Oops: 0000 [#1] PREEMPT
[ 1845.185026] Modules linked in: xfs libcrc32c [last unloaded: kprobe_example]
[ 1845.185026] CPU: 0 PID: 18 Comm: kworker/0:1 Tainted: G O 3.11.0-rc6-next-20130819+ #1
[ 1845.185026] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[ 1845.185026] Workqueue: events kobject_delayed_cleanup
[ 1845.185026] task: ffff88007ca51f00 ti: ffff88007ca5c000 task.ti: ffff88007ca5c000
[ 1845.185026] RIP: 0010:[] [] kobject_put+0x11/0x60
[ 1845.185026] RSP: 0018:ffff88007ca5dd08 EFLAGS: 00010282
[ 1845.185026] RAX: 0000000000002000 RBX: ffffffffa01600d0 RCX: ffffffff8177d638
[ 1845.185026] RDX: ffff88007ca5dc18 RSI: 0000000000000000 RDI: ffffffffa01600d0
[ 1845.185026] RBP: ffff88007ca5dd18 R08: ffffffff824e9810 R09: ffffffffffffffff
[ 1845.185026] R10: ffff8800ffffffff R11: dead4ead00000001 R12: ffffffff81a95040
[ 1845.185026] R13: ffff88007b27a960 R14: ffff88007c1f1600 R15: 0000000000000000
[ 1845.185026] FS: 0000000000000000(0000) GS:ffffffff81a23000(0000) knlGS:0000000000000000
[ 1845.185026] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1845.185026] CR2: ffffffffa01601d0 CR3: 0000000037207000 CR4: 00000000000006b0
[ 1845.185026] Stack:
[ 1845.185026] ffff88007c1f1600 ffff88007c1f1600 ffff88007ca5dd38 ffffffff812cdb7e
[ 1845.185026] 0000000000000000 ffff88007c1f1640 ffff88007ca5dd68 ffffffff812cdbfe
[ 1845.185026] ffff88007c974800 ffff88007c1f1640 ffff88007ff61a00 0000000000000000
[ 1845.185026] Call Trace:
[ 1845.185026] [] kobject_del+0x2e/0x40
[ 1845.185026] [] kobject_delayed_cleanup+0x6e/0x1d0
[ 1845.185026] [] process_one_work+0x1e5/0x670
[ 1845.185026] [] ? process_one_work+0x183/0x670
[ 1845.185026] [] worker_thread+0x113/0x370
[ 1845.185026] [] ? rescuer_thread+0x290/0x290
[ 1845.185026] [] kthread+0xda/0xe0
[ 1845.185026] [] ? _raw_spin_unlock_irq+0x30/0x60
[ 1845.185026] [] ? kthread_create_on_node+0x130/0x130
[ 1845.185026] [] ret_from_fork+0x7a/0xb0
[ 1845.185026] [] ? kthread_create_on_node+0x130/0x130
[ 1845.185026] Code: 81 48 c7 c7 28 95 ad 81 31 c0 e8 9b da 01 00 e9 4f ff ff ff 66 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 08 48 85 ff 74 1d 87 00 01 00 00 01 74 1e 48 8d 7b 38 83 6b 38 01 0f 94 c0 84
[ 1845.185026] RIP [] kobject_put+0x11/0x60
[ 1845.185026] RSP
[ 1845.185026] CR2: ffffffffa01601d0
[ 1845.185026] ---[ end trace 49a70afd109f5653 ]---Signed-off-by: Li Zhong
Acked-by: Greg Kroah-Hartman
Signed-off-by: Rusty Russell
20 Aug, 2013
1 commit
-
For some strings (e.g. version string), they are permitted to be larger
than PAGE_SIZE (although meaningless), so recommend to use scnprintf()
instead of sprintf().Signed-off-by: Chen Gang
Signed-off-by: Rusty Russell
