Steven Rostedt
9366c1ba13
ring-buffer: Fix race between integrity check and readers ...
The function rb_check_pages() was added to make sure the ring buffer's
pages were sane. This check is done when the ring buffer size is modified
as well as when the iterator is released (closing the "trace" file),
as that was considered a non fast path and a good place to do a sanity
check.
The problem is that the check does not have any locks around it.
If one process were to read the trace file, and another were to read
the raw binary file, the check could happen while the reader is reading
the file.
The issues with this is that the check requires to clear the HEAD page
before doing the full check and it restores it afterward. But readers
require the HEAD page to exist before it can read the buffer, otherwise
it gives a nasty warning and disables the buffer.
By adding the reader lock around the check, this keeps the race from
happening.
Cc: stable@vger.kernel.org # 3.6
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2012-11-30 11:09:57 -05:00
KGDB/KDB fixes and cleanups
2012-10-13 11:16:58 +09:00
perf, powerpc: Fix hw breakpoints returning -ENOSPC
2012-10-30 10:07:58 +01:00
irqdomain: augment add_simple() to allocate descs
2012-10-10 08:57:26 +02:00
Merge branch 'pm-qos'
2012-09-17 20:25:51 +02:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-12 22:13:05 +09:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-12 22:17:48 +09:00
ring-buffer: Fix race between integrity check and readers
2012-11-30 11:09:57 -05:00
vfs: make path_openat take a struct filename pointer
2012-10-12 20:15:09 -04:00
[SCSI] async: make async_synchronize_full() flush all work regardless of domain
2012-07-20 09:07:37 +01:00
fs: handle failed audit_log_start properly
2012-10-09 23:33:37 -04:00
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
audit: clean up refcounting in audit-tree
2012-08-15 12:55:22 +02:00
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
audit: make audit_inode take struct filename
2012-10-12 20:15:09 -04:00
userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
2012-05-15 14:59:24 -07:00
Revert "cgroup: Remove task_lock() from cgroup_post_fork()"
2012-10-19 14:09:35 -07:00
cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them
2012-09-14 12:01:16 -07:00
new helper: sigsuspend()
2012-05-21 23:52:30 -04:00
CPU hotplug, debug: detect imbalance between get_online_cpus() and put_online_cpus()
2012-10-09 16:22:15 +09:00
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
userns: Make credential debugging user namespace safe.
2012-08-23 22:54:18 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
extable: Skip sorting if sorted at build time.
2012-04-19 15:06:55 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2012-10-10 12:02:25 +09:00
PM / Freezer: Remove references to TIF_FREEZE in comments
2012-03-04 23:08:54 +01:00
futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi()
2012-07-24 16:02:57 +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
jump_label: Export jump_label_rate_limit()
2012-08-06 19:00:35 +03:00
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: Adjust spin lock inlining Kconfig options
2012-09-13 17:56:13 +02:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
kdump: remove unneeded include
2012-10-06 03:05:19 +09:00
[media] kernel:kfifo: export __kfifo_max_r symbol
2012-04-11 18:24:37 -03:00
infrastructure for saner ret_from_kernel_thread semantics
2012-10-12 13:35:07 -04:00
kprobes/x86: Fix to support jprobes on ftrace-based kprobe
2012-09-13 22:52:11 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2012-10-13 10:05:52 +09:00
brlocks/lglocks: turn into functions
2012-05-29 23:28:41 -04:00
lockdep: Check if nested lock is actually held
2012-09-13 17:00:44 +02:00
Makefile: Documentation for external tool should be correct
2012-10-25 16:00:53 -07:00
MODSIGN: Provide module signing public keys to the kernel
2012-10-10 20:01:22 +10:30
MODSIGN: Move the magic string to the end of a module and eliminate the search
2012-10-19 17:30:40 -07:00
MODSIGN: Move the magic string to the end of a module and eliminate the search
2012-10-19 17:30:40 -07:00
module_signing: fix printk format warning
2012-10-22 08:56:34 +03:00
sched/rt: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +01:00
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
net ip6 flowlabel: Make owner a union of struct pid * and kuid_t
2012-08-14 21:49:25 -07:00
pidns: limit the nesting depth of pid namespaces
2012-10-25 14:37:53 -07:00
printk: Fix scheduling-while-atomic problem in console_cpu_notify()
2012-10-16 18:17:44 -07:00
ptrace: mark __ptrace_may_access() static
2012-08-03 14:47:17 +10:00
rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()
2012-02-21 09:06:12 -08:00
rcu: Add PROVE_RCU_DELAY to provoke difficult races
2012-09-23 07:42:49 -07:00
rcu: Move TINY_RCU quiescent state out of extended quiescent state
2012-09-23 07:42:52 -07:00
rcu: Move TINY_PREEMPT_RCU away from raw_local_irq_save()
2012-09-23 07:42:51 -07:00
rcu: Prevent initialization race in rcutorture kthreads
2012-09-23 07:42:23 -07:00
rcu: Grace-period initialization excludes only RCU notifier
2012-10-08 09:06:38 -07:00
rcu: Grace-period initialization excludes only RCU notifier
2012-10-08 09:06:38 -07:00
rcu: Make RCU_FAST_NO_HZ handle adaptive ticks
2012-09-26 15:44:02 +02:00
Merge remote-tracking branch 'tip/smp/hotplug' into next.2012.09.25b
2012-09-25 10:01:45 -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
kernel/resource.c: fix stack overflow in __reserve_region_with_split()
2012-10-06 03:05:31 +09:00
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
coredump: pass siginfo_t* to do_coredump() and below, not merely signr
2012-10-06 03:05:16 +09:00
smp: Remove ipi_call_lock[_irq]()/ipi_call_unlock[_irq]()
2012-06-05 17:27:14 +02:00
hotplug: Fix UP bug in smpboot hotplug code
2012-08-13 17:01:07 +02:00
smpboot: Provide infrastructure for percpu hotplug threads
2012-08-13 17:01:07 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-01 10:43:39 -07:00
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
workqueue: deprecate system_nrt[_freezable]_wq
2012-08-20 14:51:24 -07:00
use clamp_t in UNAME26 fix
2012-10-19 18:51:17 -07:00
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
Kconfig: clean up the "#if defined(arch)" list for exception-trace sysctl entry
2012-10-09 16:22:14 +09:00
mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads
2012-07-31 18:42:40 -07:00
task_work: task_work_add() should not succeed after exit_task_work()
2012-09-13 16:47:34 +02:00
taskstats: cgroupstats_user_cmd() may leak on error
2012-10-06 03:05:31 +09:00
time: Move update_vsyscall definitions to timekeeper_internal.h
2012-09-24 12:38:06 -04:00
timers: Fix endless looping between cascade() and internal_add_timer()
2012-10-09 21:27:14 +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
userns: Convert taskstats to handle the user and pid namespaces.
2012-09-18 01:01:32 -07:00
userns: Convert setting and getting uid and gid system calls to use kuid and kgid
2012-05-03 03:28:41 -07:00
userns: Add kprojid_t and associated infrastructure in projid.h
2012-09-18 01:01:37 -07:00
userns: Add kprojid_t and associated infrastructure in projid.h
2012-09-18 01:01:37 -07:00
userns: Use cred->user_ns instead of cred->user->user_ns
2012-04-07 16:55:51 -07:00
watchdog: Use hotplug thread infrastructure
2012-08-13 17:01:07 +02:00
workqueue: cancel_delayed_work() should return %false if work item is idle
2012-10-24 12:38:16 -07:00
9366c1ba13