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Thomas Gleixner 47b6b11c0a futex: Ensure the correct return value from futex_lock_pi() 
commit 12bb3f7f1b03d5913b3f9d4236a488aa7774dfe9 upstream

In case that futex_lock_pi() was aborted by a signal or a timeout and the
task returned without acquiring the rtmutex, but is the designated owner of
the futex due to a concurrent futex_unlock_pi() fixup_owner() is invoked to
establish consistent state. In that case it invokes fixup_pi_state_owner()
which in turn tries to acquire the rtmutex again. If that succeeds then it
does not propagate this success to fixup_owner() and futex_lock_pi()
returns -EINTR or -ETIMEOUT despite having the futex locked.

Return success from fixup_pi_state_owner() in all cases where the current
task owns the rtmutex and therefore the futex and propagate it correctly
through fixup_owner(). Fixup the other callsite which does not expect a
positive return value.

Change-Id: I7ee0c1adecd54c7fb2878a0ec5598bd650188149
Fixes: c1e2f0eaf0 ("futex: Avoid violating the 10th rule of futex")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 72f38fffa4758b878f819f8a47761b3f03443f36
Git-repo: https://android.googlesource.com/kernel/msm
Signed-off-by: PavanKumar S.R. <pavasr@codeaurora.org>
2021-08-03 23:15:34 +05:30
..
bpf This is the 4.19.149 stable release 2020-10-01 16:49:05 +02:00
cgroup BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable 2021-07-01 23:43:00 -07:00
configs ANDROID: remove android config fragments 2018-08-28 17:15:17 +05:30
debug Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
dma Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
events Revert "ANDROID: security,perf: Allow further restriction of perf_event_open" 2021-04-30 00:21:50 -07:00
gcov This is the 4.19.146 stable release 2020-09-17 13:59:19 +02:00
irq Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
livepatch livepatch: Nullify obj->mod in klp_module_coming()'s error path 2019-10-07 18:57:10 +02:00
locking Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
power Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
printk Merge android-4.19-stable.149 (9ce79d9) into msm-4.19 2020-10-21 09:25:49 +05:30
rcu Merge android-4.19.110 (1984fff) into msm-4.19 2020-05-23 05:08:22 -07:00
sched BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable 2021-07-01 23:43:00 -07:00
time Merge "Merge android-4.19-stable.152 (13abe23) into msm-4.19" 2020-11-10 06:31:20 -08:00
trace Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
.gitignore BACKPORT: Provide in-kernel headers to make extending kernel easier 2019-06-12 12:33:20 +00:00
acct.c acct_on(): don't mess with freeze protection 2019-05-31 06:46:05 -07:00
async.c
audit.c audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
audit.h audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
audit_fsnotify.c
audit_tree.c audit: Embed key into chunk 2019-12-13 08:51:11 +01:00
audit_watch.c audit: CONFIG_CHANGE don't log internal bookkeeping as an event 2020-10-01 13:14:33 +02:00
auditfilter.c audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
auditsc.c audit: print empty EXECVE args 2019-12-01 09:17:17 +01:00
backtracetest.c
bounds.c kbuild: fix kernel/bounds.c 'W=1' warning 2018-11-13 11:08:47 -08:00
capability.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
cfi.c ANDROID: cfi: fix export symbol types 2020-04-29 19:16:15 +02:00
compat.c make 'user_access_begin()' do 'access_ok()' 2020-06-22 09:04:58 +02:00
configs.c
context_tracking.c
cpu.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
cpu_pm.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
crash_core.c kernel/crash_core.c: print timestamp using time64_t 2018-08-22 10:52:47 -07:00
crash_dump.c
cred.c memcg: account security cred as well to kmemcg 2020-01-09 10:19:00 +01:00
delayacct.c UPSTREAM: delayacct: track delays from thrashing cache pages 2019-03-21 16:25:26 -07:00
dma.c
elfcore.c kernel/elfcore.c: include proper prototypes 2019-10-11 18:21:23 +02:00
exec_domain.c
exit.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
extable.c
fail_function.c
fork.c Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
freezer.c PM / reboot: Eliminate race between reboot and suspend 2018-08-06 12:35:20 +02:00
futex.c futex: Ensure the correct return value from futex_lock_pi() 2021-08-03 23:15:34 +05:30
gen_kheaders.sh kheaders: include only headers into kheaders_data.tar.xz 2020-06-11 05:00:06 -07:00
groups.c
hung_task.c hung task: check specific tasks for long uninterruptible sleep state 2019-08-02 12:42:25 -07:00
iomem.c
irq_work.c irq_work: Do not raise an IPI when queueing work on the local CPU 2019-05-31 06:46:19 -07:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-06-04 08:02:34 +02:00
kallsyms.c Merge 4.19.133 into android-4.19-stable 2020-07-17 07:54:52 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks locking/rwsem: for rwsem prio aware enhancement 2019-05-24 15:32:11 +08:00
Kconfig.preempt kconfig: include kernel/Kconfig.preempt from init/Kconfig 2018-08-02 08:06:54 +09:00
kcov.c UPSTREAM: kcov: remote coverage support 2020-01-15 14:51:23 +00:00
kexec.c
kexec_core.c kexec: Allocate decrypted control pages for kdump if SME is enabled 2019-11-24 08:20:29 +01:00
kexec_file.c
kexec_internal.h
kheaders.c BACKPORT: kheaders: Move from proc to sysfs 2019-06-12 12:33:54 +00:00
kmod.c kmod: make request_module() return an error when autoloading is disabled 2020-04-17 10:48:52 +02:00
kprobes.c kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE 2020-10-01 13:14:54 +02:00
ksysfs.c
kthread.c This is the 4.19.156 stable release 2020-11-10 13:23:09 +01:00
latencytop.c
Makefile Merge android-4.19.95 (5da1114) into msm-4.19 2020-03-27 10:48:20 -07:00
memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-29 16:43:27 +01:00
module-internal.h
module.c Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
module_signing.c
notifier.c Merge "Merge android-4.19-stable.113 (2b82910d) into msm-4.19" 2020-07-24 22:21:24 -07:00
nsproxy.c
padata.c padata: purge get_cpu and reorder_via_wq from padata_do_serial 2020-05-27 17:37:36 +02:00
panic.c Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
params.c ANDROID: GKI: export symbols from abi_gki_aarch64_qcom_whitelist 2020-04-13 21:36:41 +00:00
pid.c UPSTREAM: pid: add pidfd_open() 2019-08-12 13:36:37 -04:00
pid_namespace.c signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig 2019-07-26 09:14:01 +02:00
profile.c
ptrace.c ptrace: reintroduce usage of subjective credentials in ptrace_has_cap() 2020-01-23 08:21:29 +01:00
range.c
reboot.c UPSTREAM: GKI: panic/reboot: allow specifying reboot_mode for panic only 2020-04-17 05:00:40 +00:00
relay.c kernel/relay.c: fix memleak on destroy relay channel 2020-08-26 10:30:59 +02:00
resource.c resource: fix locking in find_next_iomem_res() 2019-09-16 08:22:20 +02:00
rseq.c
scs.c FROMLIST: scs: add support for stack usage debugging 2019-11-27 12:37:25 -08:00
seccomp.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
signal.c signal: Avoid corrupting si_pid and si_uid in do_notify_parent 2021-03-25 22:32:03 -07:00
smp.c smp: Wake up all idle CPUs when suspending to idle 2019-03-15 01:59:15 -07:00
smpboot.c
smpboot.h
softirq.c trace: Add trace points for tasklet entry/exit 2020-01-28 20:45:01 -08:00
stacktrace.c
stop_machine.c Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-08-13 11:25:07 -07:00
sys.c This is the 4.19.149 stable release 2020-10-01 16:49:05 +02:00
sys_ni.c UPSTREAM: signal: support CLONE_PIDFD with pidfd_send_signal 2019-08-12 13:36:37 -04:00
sysctl.c sched/walt: Improve the scheduler 2020-10-06 12:41:10 +05:30
sysctl_binary.c netfilter: nf_defrag_ipv4: Add sysctl to disable per interface 2018-12-03 15:57:38 -08:00
task_work.c
taskstats.c taskstats: extended taskstats2 with acct fields 2020-05-13 22:59:08 -07:00
test_kprobes.c
torture.c
tracepoint.c tracepoint: Fix tracepoint array element size mismatch 2018-10-17 15:35:29 -04:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c usermodehelper: reset umask to default before executing user process 2020-10-14 10:31:21 +02:00
up.c
user-return-notifier.c
user.c ANDROID: proc: Add /proc/uid directory 2019-03-06 15:59:21 +00:00
user_namespace.c userns: also map extents in the reverse map to kernel IDs 2018-11-13 11:09:00 -08:00
utsname.c
utsname_sysctl.c sys: don't hold uts_sem while accessing userspace memory 2018-08-11 02:05:53 -05:00
watchdog.c Merge android-4.19.110 (1984fff) into msm-4.19 2020-05-23 05:08:22 -07:00
watchdog_hld.c watchdog: Mark watchdog touch functions as notrace 2018-08-30 12:56:40 +02:00
workqueue.c Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
workqueue_internal.h UPSTREAM: psi: fix aggregation idle shut-off 2019-03-21 16:25:27 -07:00