Steven Rostedt
fd4b616b0f
sysctl: suppress kmemleak messages ...
register_sysctl_table() is a strange function, as it makes internal
allocations (a header) to register a sysctl_table. This header is a
handle to the table that is created, and can be used to unregister the
table. But if the table is permanent and never unregistered, the header
acts the same as a static variable.
Unfortunately, this allocation of memory that is never expected to be
freed fools kmemleak in thinking that we have leaked memory. For those
sysctl tables that are never unregistered, and have no pointer referencing
them, kmemleak will think that these are memory leaks:
unreferenced object 0xffff880079fb9d40 (size 192):
comm "swapper/0", pid 0, jiffies 4294667316 (age 12614.152s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8146b590>] kmemleak_alloc+0x73/0x98
[<ffffffff8110a935>] kmemleak_alloc_recursive.constprop.42+0x16/0x18
[<ffffffff8110b852>] __kmalloc+0x107/0x153
[<ffffffff8116fa72>] kzalloc.constprop.8+0xe/0x10
[<ffffffff811703c9>] __register_sysctl_paths+0xe1/0x160
[<ffffffff81170463>] register_sysctl_paths+0x1b/0x1d
[<ffffffff8117047d>] register_sysctl_table+0x18/0x1a
[<ffffffff81afb0a1>] sysctl_init+0x10/0x14
[<ffffffff81b05a6f>] proc_sys_init+0x2f/0x31
[<ffffffff81b0584c>] proc_root_init+0xa5/0xa7
[<ffffffff81ae5b7e>] start_kernel+0x3d0/0x40a
[<ffffffff81ae52a7>] x86_64_start_reservations+0xae/0xb2
[<ffffffff81ae53ad>] x86_64_start_kernel+0x102/0x111
[<ffffffffffffffff>] 0xffffffffffffffff
The sysctl_base_table used by sysctl itself is one such instance that
registers the table to never be unregistered.
Use kmemleak_not_leak() to suppress the kmemleak false positive.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-30 17:25:21 -07:00
kdb: Switch to nolock variants of kmsg_dump functions
2012-07-21 10:34:00 -07:00
perf: Introduce perf_pmu_migrate_context()
2012-06-18 12:13:21 +02:00
Devicetree updates for 3.6
2012-07-24 14:07:22 -07:00
NMI watchdog: fix for lockup detector breakage on resume
2012-07-30 17:25:13 -07:00
sched: Fix race in task_group()
2012-07-24 13:58:20 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-22 11:35:46 -07:00
Staging tree patches for 3.6-rc1
2012-07-26 11:14:49 -07:00
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
[SCSI] async: make async_synchronize_full() flush all work regardless of domain
2012-07-20 09:07:37 +01:00
netlink: add netlink_kernel_cfg parameter to netlink_kernel_create
2012-06-29 16:46:02 -07:00
audit: remove AUDIT_SETUP_CONTEXT as it isn't used
2012-01-17 16:16:57 -05:00
VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors
2012-07-14 16:37:27 +04:00
get rid of kern_path_parent()
2012-07-14 16:35:02 +04:00
audit: allow interfield comparison in audit rules
2012-01-17 16:17:01 -05:00
seccomp: remove duplicated failure logging
2012-04-14 11:13:20 +10:00
userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
2012-05-15 14:59:24 -07:00
Merge branch 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-07-24 17:47:44 -07:00
cgroup: convert all non-memcg controllers to the new cftype interface
2012-04-01 12:09:55 -07:00
new helper: sigsuspend()
2012-05-21 23:52:30 -04:00
kernel/cpu.c: document clear_tasks_mm_cpumask()
2012-05-31 17:49:30 -07:00
kernel/cpu_pm.c: fix various typos
2012-05-31 17:49:27 -07:00
cpusets: Remove/update outdated comments
2012-07-24 13:53:28 +02:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
keys: kill task_struct->replacement_session_keyring
2012-05-23 22:11:41 -04:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
posix_types.h: Cleanup stale __NFDBITS and related definitions
2012-07-26 13:36:43 -07:00
extable: Skip sorting if sorted at build time.
2012-04-19 15:06:55 -07:00
fork: fix error handling in dup_task()
2012-07-30 17:25:20 -07:00
PM / Freezer: Remove references to TIF_FREEZE in comments
2012-03-04 23:08:54 +01:00
futex: Mark get_robust_list as deprecated
2012-03-29 11:37:17 +02:00
futex: Mark get_robust_list as deprecated
2012-03-29 11:37:17 +02:00
userns: Convert in_group_p and in_egroup_p to use kgid_t
2012-05-03 03:29:33 -07:00
hrtimer: Update hrtimer base offsets each hrtimer_interrupt
2012-07-11 23:34:39 +02:00
hung task debugging: Inject NMI when hung and going to panic
2012-04-25 12:39:25 +02:00
irq_work: fix compile failure on tile from missing include
2012-04-13 13:15:16 -04:00
itimer: Use printk_once instead of WARN_ONCE
2012-04-10 11:00:30 +02:00
static keys: Inline the static_key_enabled() function
2012-02-28 20:01:08 +01:00
vsprintf: fix %ps on non symbols when using kallsyms
2012-05-29 16:22:32 -07:00
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
kdump: append newline to the last lien of vmcoreinfo note
2012-07-30 17:25:20 -07:00
[media] kernel:kfifo: export __kfifo_max_r symbol
2012-04-11 18:24:37 -03:00
kmod: avoid deadlock from recursive kmod call
2012-07-30 17:25:20 -07:00
kprobes: return proper error code from register_kprobe()
2012-03-05 15:49:42 -08:00
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed
2012-07-22 10:15:28 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
brlocks/lglocks: turn into functions
2012-05-29 23:28:41 -04:00
lockdep: Add CPU-idle/offline warning to lockdep-RCU splat
2012-02-21 09:06:06 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-06-01 10:34:35 -07:00
Guard check in module loader against integer overflow
2012-05-23 22:28:53 +09:30
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
sched/rt: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
padata: Fix cpu hotplug
2012-03-29 19:52:46 +08:00
panic: fix a possible deadlock in panic()
2012-07-30 17:25:13 -07:00
params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)
2012-05-04 17:28:18 -07:00
mm: add a low limit to alloc_large_system_hash
2012-05-24 00:28:21 -04:00
pidns: guarantee that the pidns init will be the last pidns process reaped
2012-06-20 14:39:36 -07:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk: only look for prefix levels in kernel messages
2012-07-30 17:25:14 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
userns: Convert ptrace, kill, set_priority permission checks to work with kuids and kgids
2012-05-03 03:28:51 -07:00
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()
2012-02-21 09:06:12 -08:00
rcu: Consolidate tree/tiny __rcu_read_{,un}lock() implementations
2012-07-02 12:34:23 -07:00
rcu: Fix rcu_is_cpu_idle() #ifdef in TINY_RCU
2012-07-02 12:34:25 -07:00
rcu: Fix code-style issues involving "else"
2012-07-06 06:01:48 -07:00
rcu: Fix broken strings in RCU's source code.
2012-07-06 06:01:49 -07:00
rcu: Fix code-style issues involving "else"
2012-07-06 06:01:48 -07:00
Merge branches 'bigrtm.2012.07.04a', 'doctorture.2012.07.02a', 'fixes.2012.07.06a' and 'fnh.2012.07.02a' into HEAD
2012-07-06 05:59:30 -07:00
rcu: Fix code-style issues involving "else"
2012-07-06 06:01:48 -07:00
rcu: Fix broken strings in RCU's source code.
2012-07-06 06:01:49 -07:00
splice: fix racy pipe->buffers uses
2012-06-13 21:16:42 +02:00
rescounters: add res_counter_uncharge_until()
2012-05-29 16:22:27 -07:00
resources: allow adjust_resource() for resources with no parent
2012-06-13 15:42:22 -06:00
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER
2012-04-18 12:24:52 +10:00
semaphore: fix improper comment reference to mutex
2012-04-05 17:15:55 -07:00
signal: make sure we don't get stopped with pending task_work
2012-07-22 23:57:54 +04:00
smp: Remove ipi_call_lock[_irq]()/ipi_call_unlock[_irq]()
2012-06-05 17:27:14 +02:00
smpboot, idle: Fix comment mismatch over idle_threads_init()
2012-05-24 22:58:08 +02:00
smpboot: Remove leftover declaration
2012-06-11 15:07:52 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-20 10:32:09 -07:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
rcu: Implement per-domain single-threaded call_srcu() state machine
2012-04-30 10:48:25 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
kernel/sys.c: avoid argv_free(NULL)
2012-07-30 17:25:13 -07:00
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
sysctl: suppress kmemleak messages
2012-07-30 17:25:21 -07:00
ipv4: Don't add deprecated new binary sysctl value.
2012-06-22 23:02:22 -07:00
deal with task_work callbacks adding more work
2012-07-22 23:57:57 +04:00
time: Remove bogus comments
2012-03-15 18:17:55 -07:00
timers: Improve get_next_timer_interrupt()
2012-06-06 13:49:02 +02:00
static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()
2012-02-24 10:05:59 +01:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
userns: Convert setting and getting uid and gid system calls to use kuid and kgid
2012-05-03 03:28:41 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
userns: Silence silly gcc warning.
2012-05-19 15:44:40 -06:00
userns: Store uid and gid values in struct cred with kuid_t and kgid_t types
2012-05-03 03:28:38 -07:00
userns: Use cred->user_ns instead of cred->user->user_ns
2012-04-07 16:55:51 -07:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
NMI watchdog: fix for lockup detector breakage on resume
2012-07-30 17:25:13 -07:00
workqueue: fix spurious CPU locality WARN from process_one_work()
2012-07-22 10:16:34 -07:00
fd4b616b0f