Chen Jie a7e8300478 futex: Ensure that futex address is aligned in handle_futex_death() ...

commit 5a07168d8d upstream.

The futex code requires that the user space addresses of futexes are 32bit
aligned. sys_futex() checks this in futex_get_keys() but the robust list
code has no alignment check in place.

As a consequence the kernel crashes on architectures with strict alignment
requirements in handle_futex_death() when trying to cmpxchg() on an
unaligned futex address which was retrieved from the robust list.

[ tglx: Rewrote changelog, proper sizeof() based alignement check and add
  	comment ]

Fixes: 0771dfefc9 ("[PATCH] lightweight robust futexes: core")
Signed-off-by: Chen Jie <chenjie6@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <dvhart@infradead.org>
Cc: <peterz@infradead.org>
Cc: <zengweilin@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1552621478-119787-1-git-send-email-chenjie6@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-03-27 14:13:52 +09:00

..

bpf

bpf: fix lockdep false positive in percpu_freelist

2019-03-13 14:03:20 -07:00

cgroup

fix cgroup_do_mount() handling of failure exits

2019-03-23 14:35:18 +01:00

configs

…

debug

kdb: Don't back trace on a cpu that didn't round up

2019-02-12 19:46:09 +01:00

events

perf core: Fix perf_proc_update_handler() bug

2019-03-13 14:03:11 -07:00

gcov

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irq

genirq: Make sure the initial affinity is not empty

2019-03-05 17:57:59 +01:00

livepatch

livepatch: Validate module/old func name length

2018-09-09 19:55:58 +02:00

locking

locking/rwsem: Fix (possible) missed wakeup

2019-03-05 17:58:00 +01:00

power

PM / sleep: wakeup: Fix build error caused by missing SRCU support

2018-09-09 19:55:58 +02:00

printk

printk: Wake klogd when passing console_lock owner

2018-12-17 09:28:55 +01:00

rcu

rcu: Do RCU GP kthread self-wakeup from softirq and interrupt

2019-03-23 14:35:30 +01:00

sched

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:46:13 +01:00

time

timekeeping: Use proper seqcount initializer

2019-02-12 19:46:01 +01:00

trace

tracing: Do not free iter->trace in fail path of tracing_open_pipe()

2019-03-23 14:35:19 +01:00

.gitignore

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acct.c

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async.c

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audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit: fix use-after-free in audit_add_watch

2018-09-26 08:38:09 +02:00

audit.c

audit: return on memory error to avoid null pointer dereference

2018-05-30 07:52:39 +02:00

audit.h

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auditfilter.c

audit: allow not equal op for audit by executable

2018-08-03 07:50:39 +02:00

auditsc.c

audit: fix potential null dereference 'context->module.name'

2018-08-06 16:20:49 +02:00

backtracetest.c

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bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:15:08 -08:00

capability.c

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compat.c

compat: fix 4-byte infoleak via uninitialized struct field

2018-05-16 10:10:26 +02:00

configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:46:13 +01:00

crash_core.c

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crash_dump.c

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cred.c

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delayacct.c

delayacct: Use raw_spinlocks

2018-08-03 07:50:38 +02:00

dma.c

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elfcore.c

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exec_domain.c

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exit.c

sched/wait: Fix rcuwait_wake_up() ordering

2019-03-05 17:58:00 +01:00

extable.c

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fork.c

fork: record start_time late

2019-01-13 10:01:02 +01:00

freezer.c

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futex_compat.c

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futex.c

futex: Ensure that futex address is aligned in handle_futex_death()

2019-03-27 14:13:52 +09:00

groups.c

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hung_task.c

kernel/hung_task.c: force console verbose before panic

2019-02-12 19:46:10 +01:00

irq_work.c

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jump_label.c

sched/core: Fix cpu.max vs. cpuhotplug deadlock

2018-12-05 19:41:17 +01:00

kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:50:22 +02:00

kexec_core.c

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kexec_file.c

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kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()

2018-11-13 11:14:55 -08:00

ksysfs.c

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kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:50:21 +02:00

latencytop.c

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Makefile

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memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:01:02 +01:00

module_signing.c

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module-internal.h

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module.c

kobject: return error code if writing /sys/.../uevent fails

2019-02-12 19:46:02 +01:00

notifier.c

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nsproxy.c

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padata.c

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panic.c

panic: avoid deadlocks in re-entrant console drivers

2018-12-29 13:39:10 +01:00

params.c

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pid_namespace.c

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pid.c

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profile.c

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ptrace.c

ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS

2018-12-05 19:41:21 +01:00

range.c

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reboot.c

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relay.c

relay: check return of create_buf_file() properly

2019-03-13 14:03:20 -07:00

resource.c

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seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 18:54:04 +02:00

signal.c

signal: Restore the stop PTRACE_EVENT_EXIT

2019-02-20 10:20:54 +01:00

smp.c

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:46:13 +01:00

smpboot.c

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smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:12:47 +02:00

stacktrace.c

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stop_machine.c

stop_machine: Atomically queue and wake stopper threads

2018-09-05 09:26:36 +02:00

sys_ni.c

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sys.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

sysctl_binary.c

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sysctl.c

kernel/sysctl.c: add missing range check in do_proc_dointvec_minmax_conv

2019-03-23 14:35:24 +01:00

task_work.c

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taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:51:50 +02:00

tsacct.c

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ucount.c

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uid16.c

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umh.c

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up.c

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user_namespace.c

userns: move user access out of the mutex

2018-09-09 19:56:00 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

utsname.c

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watchdog_hld.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00

watchdog.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00

workqueue_internal.h

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workqueue.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00