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Adrian Salido 4c0933247e ANDROID: tracing: fix race condition reading saved tgids 
Commit 939c7a4f04 ("tracing: Introduce saved_cmdlines_size file")
introduced ability to change saved cmdlines size. This resized saved
command lines but missed resizing tgid mapping as well.

Another issue is that when the resize happens, it removes saved command
lines and reallocates new memory for it. This introduced a race
condition when reading the global savecmd as this can be freed in the
middle of accessing it causing a use after free access. Fix this by
implementing locking.

Signed-off-by: Adrian Salido <salidoa@google.com>
Bug: 36007735
Change-Id: I334791ac35f8bcbd34362ed112aa624275a46947
(cherry picked from commit 7116d306da66de0de21e982024b4d3a3056f4461)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
2018-10-04 14:16:57 +05:30
..
bpf bpf: fix references to free_bpf_prog_info() in comments 2018-08-06 16:24:37 +02:00
configs UPSTREAM: config: android-base: disable CONFIG_NFSD and CONFIG_NFS_FS 2018-03-05 21:56:13 +05:30
debug Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-06-11 16:48:21 +05:30
events Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-06-11 16:48:21 +05:30
gcov Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-02-01 12:02:38 +08:00
irq genirq: Delay incrementing interrupt count if it's disabled/pending 2018-09-15 09:40:40 +02:00
livepatch
locking Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
power Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
printk Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-03-23 02:33:06 +00:00
rcu BACKPORT: kernel: add kcov code coverage 2018-01-22 13:15:43 +05:30
sched ANDROID: Fix massive cpufreq_times memory leaks 2018-07-19 22:03:01 +05:30
time Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
trace ANDROID: tracing: fix race condition reading saved tgids 2018-10-04 14:16:57 +05:30
.gitignore
acct.c kernel/acct.c: fix the acct->needcheck check in check_free_space() 2018-01-10 09:27:08 +01:00
async.c kernel/async.c: revert "async: simplify lowest_in_progress()" 2018-02-16 20:09:45 +01:00
audit.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-06-11 16:48:21 +05:30
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c audit: fix use-after-free in audit_add_watch 2018-09-26 08:35:08 +02:00
auditfilter.c audit: allow not equal op for audit by executable 2018-08-06 16:24:38 +02:00
auditsc.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
backtracetest.c
bounds.c
capability.c exec: Ensure mm->user_ns contains the execed files 2017-01-06 11:16:14 +01:00
cgroup.c cgroup: Disable IRQs while holding css_set_lock 2018-06-11 15:59:36 +05:30
cgroup_freezer.c
cgroup_pids.c
compat.c
configs.c
context_tracking.c
cpu.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2017-01-13 12:01:52 +08:00
cpu_pm.c
cpuset.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2017-10-13 23:14:45 +08:00
crash_dump.c
cred.c cred: Reject inodes with invalid ids in set_create_file_as() 2016-09-15 08:27:49 +02:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c ANDROID: Fix massive cpufreq_times memory leaks 2018-07-19 22:03:01 +05:30
extable.c kernel/extable.c: mark core_kernel_text notrace 2017-07-21 07:44:56 +02:00
fork.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
freezer.c
futex.c This is the 4.4.134 stable release 2018-05-30 11:03:51 +01:00
futex_compat.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 12:01:16 -08:00
groups.c kernel: make groups_sort calling a responsibility group_info allocators 2018-01-10 09:27:10 +01:00
hung_task.c
irq_work.c
jump_label.c jump_label: Invoke jump_label_test() via early_initcall() 2017-12-16 10:33:55 +01:00
kallsyms.c
kcmp.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 12:01:16 -08:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c UPSTREAM: kcov: fix comparison callback signature 2018-01-22 13:15:43 +05:30
kexec.c s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres() 2017-10-25 11:26:32 +08:00
kexec_core.c s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres() 2017-10-25 11:26:32 +08:00
kexec_file.c kexec: introduce a protection mechanism for the crashkernel reserved memory 2017-10-25 11:23:52 +08:00
kexec_internal.h
kmod.c
kprobes.c kprobes: Make list and blacklist root user read only 2018-09-05 09:18:40 +02:00
ksysfs.c
kthread.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
latencytop.c
Makefile BACKPORT: kernel: add kcov code coverage 2018-01-22 13:15:43 +05:30
membarrier.c Fix: Disable sys_membarrier when nohz_full is enabled 2017-03-12 06:37:26 +01:00
memremap.c mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done} 2017-01-19 20:17:18 +01:00
module-internal.h
module.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-03-05 20:20:17 +05:30
module_signing.c
notifier.c
nsproxy.c
padata.c padata: free correct variable 2017-05-20 14:27:02 +02:00
panic.c kernel/panic.c: add missing \n 2017-07-05 14:37:19 +02:00
params.c
pid.c pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid() 2018-04-13 19:50:03 +02:00
pid_namespace.c pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes 2017-05-25 14:30:11 +02:00
profile.c profile: hide unused functions when !CONFIG_PROC_FS 2018-02-25 11:03:44 +01:00
ptrace.c ptrace: Properly initialize ptracer_cred on fork 2017-06-14 13:16:20 +02:00
range.c
reboot.c
relay.c kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE 2018-05-30 07:49:00 +02:00
resource.c resource: fix integer overflow at reallocation 2018-04-24 09:32:05 +02:00
seccomp.c seccomp: Move speculation migitation control to arch code 2018-07-25 10:18:27 +02:00
signal.c kernel/signal.c: avoid undefined behaviour in kill_something_info 2018-05-30 07:48:52 +02:00
smp.c
smpboot.c
smpboot.h
softirq.c UPSTREAM: arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2018-01-22 13:15:43 +05:30
stacktrace.c
stop_machine.c
sys.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
sys_ni.c
sysctl.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
sysctl_binary.c fs/coredump: prevent fsuid=0 dumps into user-controlled directories 2016-04-12 09:08:58 -07:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c tracepoint: Do not warn on ENOMEM 2018-05-16 10:06:47 +02:00
tsacct.c
uid16.c kernel: make groups_sort calling a responsibility group_info allocators 2018-01-10 09:27:10 +01:00
up.c
user-return-notifier.c
user.c ANDROID: proc: Add /proc/uid directory 2018-05-20 16:39:09 +05:30
user_namespace.c userns: move user access out of the mutex 2018-09-09 20:04:35 +02:00
utsname.c
utsname_sysctl.c sys: don't hold uts_sem while accessing userspace memory 2018-09-09 20:04:35 +02:00
watchdog.c Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2017-01-09 12:01:35 +08:00
workqueue.c workqueue: use put_device() instead of kfree() 2018-05-30 07:49:04 +02:00
workqueue_internal.h workqueue: Fix NULL pointer dereference 2017-11-15 17:13:11 +01:00