Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity
android_kernel_samsung_msm8976/kernel
History
Jann Horn c31abbe622 fork: don't copy inconsistent signal handler state to child 
[ Upstream commit 06e62a46bbba20aa5286102016a04214bb446141 ]

Before this change, if a multithreaded process forks while one of its
threads is changing a signal handler using sigaction(), the memcpy() in
copy_sighand() can race with the struct assignment in do_sigaction().  It
isn't clear whether this can cause corruption of the userspace signal
handler pointer, but it definitely can cause inconsistency between
different fields of struct sigaction.

Take the appropriate spinlock to avoid this.

I have tested that this patch prevents inconsistency between sa_sigaction
and sa_flags, which is possible before this patch.

Link: http://lkml.kernel.org/r/20180702145108.73189-1-jannh@google.com
Signed-off-by: Jann Horn <jannh@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2019-07-27 21:51:36 +02:00
..
cpu sched/idle: Add missing checks to the exit condition of cpu_idle_poll() 2019-07-27 21:50:45 +02:00
debug
…
events UPSTREAM: perf/hwbp: Simplify the perf-hwbp code, fix documentation 2019-07-27 21:51:06 +02:00
gcov
…
irq This is the 3.10.99 stable release 2017-04-18 17:17:46 +02:00
locking Import latest Samsung release 2017-04-18 03:43:52 +02:00
power PM / sleep: fix device reference leak in test_suspend 2019-07-27 21:42:48 +02:00
rcu rcu: Don't disable CPU hotplug during OOM notifiers 2016-01-06 23:11:06 -08:00
sched sched/topology: Fix overlapping sched_group_mask 2019-07-27 21:45:20 +02:00
time nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick() 2019-07-27 21:46:23 +02:00
trace tracing: Fix possible double free on failure of allocating trace buffer 2019-07-27 21:46:22 +02:00
.gitignore
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks Import latest Samsung release 2017-04-18 03:43:52 +02:00
Kconfig.preempt
…
Makefile UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
acct.c
…
async.c kernel/async.c: revert "async: simplify lowest_in_progress()" 2019-07-27 21:49:48 +02:00
audit.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
audit.h Import latest Samsung release 2017-04-18 03:43:52 +02:00
audit_tree.c
…
audit_watch.c audit: Fix use after free in audit_remove_watch_rule() 2019-07-27 21:45:01 +02:00
auditfilter.c
…
auditsc.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
backtracetest.c
…
bounds.c
…
capability.c
…
cgroup.c cgroup: prefer %pK to %p 2016-12-06 09:24:09 -08:00
cgroup_freezer.c
…
compat.c
…
configs.c
…
context_tracking.c
…
cpu.c cpu: send KOBJ_ONLINE event when enabling cpus 2017-07-24 01:09:04 -07:00
cpu_pm.c
…
cpuset.c cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags 2019-07-27 21:44:59 +02:00
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c ANDROID: exec_domains: Disable request_module() call for personalities 2016-05-18 14:34:40 +05:30
exit.c kernel: Only expose su when daemon is running 2017-05-15 14:43:52 +00:00
extable.c kernel/extable.c: mark core_kernel_text notrace 2019-07-27 21:44:25 +02:00
fork.c fork: don't copy inconsistent signal handler state to child 2019-07-27 21:51:36 +02:00
freezer.c
…
futex.c futex: Calculate the futex key based on a tail page for file-based futexes 2019-07-27 21:50:08 +02:00
futex_compat.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
groups.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
hrtimer.c hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers) 2019-07-27 21:49:51 +02:00
hung_task.c
…
irq_work.c irq_work: Remove BUG_ON in irq_work_run() 2016-01-07 00:42:12 -08:00
itimer.c
…
jump_label.c
…
kallsyms.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
kcmp.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
kexec.c
…
kmod.c
…
kprobes.c
…
ksysfs.c
…
kthread.c kthread: Fix the race condition when kthread is parked 2015-06-04 17:43:41 -07:00
latencytop.c
…
modsign_pubkey.c
…
module-internal.h UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
module.c module: Invalidate signatures on force-loaded modules 2019-07-27 21:42:00 +02:00
module_signing.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
notifier.c
…
nsproxy.c
…
padata.c padata: avoid race in reordering 2019-07-27 21:44:05 +02:00
panic.c printk: do cond_resched() between lines while outputting to consoles 2019-07-27 21:41:46 +02:00
params.c kernel/params.c: align add_sysfs_param documentation with code 2019-07-27 21:45:35 +02:00
pid.c BACKPORT: FROMLIST: pids: make task_tgid_nr_ns() safe 2018-05-26 00:39:33 +02:00
pid_namespace.c
…
posix-cpu-timers.c
…
posix-timers.c posix-timers: Protect posix clock array access against speculation 2019-07-27 21:49:25 +02:00
printk.c printk: use rcuidle console tracepoint 2019-07-27 21:44:09 +02:00
profile.c
…
ptrace.c ptrace: change __ptrace_unlink() to clear ->ptrace under ->siglock 2019-07-27 21:45:46 +02:00
range.c
…
relay.c kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE 2019-07-27 21:49:13 +02:00
res_counter.c
…
resource.c This is the 3.10.99 stable release 2017-04-18 17:17:46 +02:00
seccomp.c UPSTREAM: seccomp: always propagate NO_NEW_PRIVS on tsync 2019-07-27 21:51:01 +02:00
signal.c signal: Only reschedule timers on signals timers have sent 2019-07-27 21:44:51 +02:00
smp.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
smpboot.c
…
smpboot.h
…
softirq.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
stacktrace.c
…
stop_machine.c
…
sys.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
sys_ni.c
…
sysctl.c pipe: reject F_SETPIPE_SZ with size over UINT_MAX 2019-07-27 21:49:46 +02:00
sysctl_binary.c
…
system_certificates.S UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
system_keyring.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
task_work.c
…
taskstats.c
…
test_kprobes.c
…
time.c
…
timeconst.bc
…
timer.c timers: Use proper base migration in add_timer_on() 2019-07-27 21:42:23 +02:00
tracepoint.c
…
tsacct.c
…
uid16.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
up.c
…
user-return-notifier.c
…
user.c
…
user_namespace.c userns: move user access out of the mutex 2019-07-27 21:51:26 +02:00
utsname.c
…
utsname_sysctl.c
…
watchdog.c
…
workqueue.c workqueue: trigger WARN if queue_delayed_work() is called with NULL @wq 2019-07-27 21:45:23 +02:00
workqueue_internal.h
…