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i2som-imx-linux/kernel
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Tetsuo Handa d85bc11a68 kexec: bail out upon SIGKILL when allocating memory. 
commit 7c3a6aedcd upstream.

syzbot found that a thread can stall for minutes inside kexec_load() after
that thread was killed by SIGKILL [1].  It turned out that the reproducer
was trying to allocate 2408MB of memory using kimage_alloc_page() from
kimage_load_normal_segment().  Let's check for SIGKILL before doing memory
allocation.

[1] https://syzkaller.appspot.com/bug?id=a0e3436829698d5824231251fad9d8e998f94f5e

Link: http://lkml.kernel.org/r/993c9185-d324-2640-d061-bed2dd18b1f7@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+8ab2d0f39fb79fe6ca40@syzkaller.appspotmail.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-07 18:57:28 +02:00
..
bpf
bpf: fix use after free in prog symbol exposure
2019-10-07 18:57:19 +02:00
cgroup
cgroup: Fix css_task_iter_advance_css_set() cset skip condition
2019-08-09 17:52:35 +02:00
configs
…
debug
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dma
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events
perf/core: Fix creating kernel counters for PMUs that override event->cpu
2019-08-16 10:12:50 +02:00
gcov
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irq
genirq: Prevent NULL pointer dereference in resend_irqs()
2019-09-19 09:09:34 +02:00
livepatch
livepatch: Nullify obj->mod in klp_module_coming()'s error path
2019-10-07 18:57:10 +02:00
locking
locking/lockdep: Add debug_locks check in __lock_downgrade()
2019-10-01 08:26:07 +02:00
power
x86/power: Fix 'nosmt' vs hibernation triple fault during resume
2019-06-11 12:20:52 +02:00
printk
printk: Do not lose last line in kmsg buffer dump
2019-10-05 13:10:01 +02:00
rcu
rcuperf: Fix cleanup path for invalid perf_type strings
2019-05-31 06:46:30 -07:00
sched
sched/cpufreq: Align trace event behavior of fast switching
2019-10-05 13:09:51 +02:00
time
alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP
2019-10-05 13:10:07 +02:00
trace
ftrace: Check for empty hash and comment the race with registering probes
2019-09-06 10:22:13 +02:00
.gitignore
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acct.c
acct_on(): don't mess with freeze protection
2019-05-31 06:46:05 -07:00
async.c
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audit_fsnotify.c
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audit_tree.c
…
audit_watch.c
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audit.c
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audit.h
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auditfilter.c
audit: fix a memory leak bug
2019-05-31 06:46:17 -07:00
auditsc.c
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backtracetest.c
…
bounds.c
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capability.c
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compat.c
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configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/hotplug: Fix out-of-bounds read when setting fail state
2019-07-21 09:03:11 +02:00
crash_core.c
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crash_dump.c
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cred.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-07-31 07:27:11 +02:00
delayacct.c
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dma.c
…
elfcore.c
…
exec_domain.c
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exit.c
cgroup: Call cgroup_release() before __exit_signal()
2019-08-09 17:52:34 +02:00
extable.c
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fail_function.c
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fork.c
sched/fair: Don't free p->numa_faults with concurrent readers
2019-08-04 09:30:56 +02:00
freezer.c
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futex_compat.c
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futex.c
locking/futex: Allow low-level atomic operations to return -EAGAIN
2019-05-10 17:54:11 +02:00
groups.c
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hung_task.c
kernel: hung_task.c: disable on suspend
2019-04-20 09:16:02 +02:00
iomem.c
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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
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
2019-09-21 07:17:02 +02:00
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
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kexec_core.c
kexec: bail out upon SIGKILL when allocating memory.
2019-10-07 18:57:28 +02:00
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: Prohibit probing on BUG() and WARN() address
2019-10-05 13:09:54 +02:00
ksysfs.c
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kthread.c
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latencytop.c
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Makefile
x86/uaccess, kcov: Disable stack protector
2019-06-19 08:18:01 +02:00
memremap.c
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module_signing.c
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module-internal.h
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module.c
modules: fix compile error if don't have strict module rwx
2019-09-19 09:09:40 +02:00
notifier.c
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nsproxy.c
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padata.c
padata: use smp_mb in padata_reorder to avoid orphaned padata jobs
2019-07-26 09:14:25 +02:00
panic.c
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params.c
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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
pid.c
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profile.c
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ptrace.c
ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME
2019-07-10 09:53:41 +02:00
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 14:02:35 -07:00
resource.c
resource: fix locking in find_next_iomem_res()
2019-09-16 08:22:20 +02:00
rseq.c
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seccomp.c
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signal.c
kernel/signal.c: trace_signal_deliver when signal_group_exit
2019-06-09 09:17:20 +02:00
smp.c
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smpboot.c
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smpboot.h
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softirq.c
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stacktrace.c
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stop_machine.c
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sys_ni.c
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sys.c
kernel/sys.c: prctl: fix false positive in validate_prctl_map()
2019-06-15 11:54:01 +02:00
sysctl_binary.c
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sysctl.c
sysctl: return -EINVAL if val violates minmax
2019-06-15 11:53:59 +02:00
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
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tsacct.c
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ucount.c
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uid16.c
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uid16.h
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umh.c
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up.c
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user_namespace.c
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user-return-notifier.c
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user.c
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utsname_sysctl.c
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utsname.c
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watchdog_hld.c
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watchdog.c
watchdog: Respect watchdog cpumask on CPU hotplug
2019-04-03 06:26:29 +02:00
workqueue_internal.h
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workqueue.c
workqueue: Try to catch flush_work() without INIT_WORK().
2019-05-02 09:58:56 +02:00