INFO: task hung in uprobe_start_dup_mmap
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syzbot
Jun 21, 2019, 10:16:07 PM6/21/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 9f31eb60 Linux 4.19.53
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13e54fc6a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a36b9832db62b25
dashboard link: https://syzkaller.appspot.com/bug?extid=10ae74e4dd99c5aa3ec6
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+10ae74...@syzkaller.appspotmail.com
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
INFO: task syz-executor.0:7888 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D23008 7888 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: Bad RIP value.
RSP: 002b:00007fffa11098c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fffa11098c0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fffa1109900 R08: 0000000000000001 R09: 0000000002277940
R10: 0000000002277c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffa1109950
INFO: task syz-executor.2:7894 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D23592 7894 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: Bad RIP value.
RSP: 002b:00007ffcadc50850 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcadc50850 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcadc50890 R08: 0000000000000001 R09: 0000000001a59940
R10: 0000000001a59c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcadc508e0
INFO: task syz-executor.3:7898 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D23592 7898 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007ffec1d07860 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffec1d07860 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffec1d078a0 R08: 0000000000000001 R09: 0000000001998940
R10: 0000000001998c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffec1d078f0
INFO: task syz-executor.4:7902 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D23592 7902 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007fff35c102b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff35c102b0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff35c102f0 R08: 0000000000000001 R09: 0000000002951940
R10: 0000000002951c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff35c10340
INFO: task syz-executor.5:7905 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D23592 7905 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007ffe7ea010f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe7ea010f0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe7ea01130 R08: 0000000000000001 R09: 0000000002608940
R10: 0000000002608c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe7ea01180
INFO: task udevd:8853 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27520 8853 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 0000000000002295 R09: 0000000000002295
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:8855 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27712 8855 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 0000000000002297 R09: 0000000000002297
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:14496 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27776 14496 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 00000000000038a0 R09: 00000000000038a0
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task syz-executor.1:21003 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28032 21003 7892 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
percpu_down_write+0x342/0x440 kernel/locking/percpu-rwsem.c:162
register_for_each_vma+0x8c/0xde0 kernel/events/uprobes.c:797
__uprobe_register kernel/events/uprobes.c:926 [inline]
uprobe_register+0x3d6/0x710 kernel/events/uprobes.c:941
probe_event_enable+0x42d/0xbd0 kernel/trace/trace_uprobe.c:915
trace_uprobe_register+0x4b5/0x950 kernel/trace/trace_uprobe.c:1200
perf_trace_event_reg kernel/trace/trace_event_perf.c:124 [inline]
perf_trace_event_init+0x4f3/0x980 kernel/trace/trace_event_perf.c:199
perf_uprobe_init+0x168/0x210 kernel/trace/trace_event_perf.c:326
perf_uprobe_event_init+0xff/0x190 kernel/events/core.c:8517
perf_try_init_event+0x131/0x2f0 kernel/events/core.c:9792
perf_init_event kernel/events/core.c:9823 [inline]
perf_event_alloc.part.0+0x1d3b/0x2e30 kernel/events/core.c:10097
perf_event_alloc kernel/events/core.c:10453 [inline]
__do_sys_perf_event_open+0x842/0x2730 kernel/events/core.c:10554
__se_sys_perf_event_open kernel/events/core.c:10443 [inline]
__x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10443
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: d3 ee 40 80 ff f8 77 05 48 8b 3f eb 08 48 8b 7c 1f f8 48 d3 ef 48 29
f7 48 d3 e7 0f 94 00 c3 cc cc 48 8b 74 24 08 48 8b 5c 24 <10> 48 8b 7c 24
18 48 8b 54 24 20 4c 8d 4c 24 28 e9 02 00 00 00 cc
RSP: 002b:00007f8ebe5cbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f8ebe5cc6d4
R13: 00000000004c5f2a R14: 00000000004da8c8 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1031:
#0: 00000000ec4f7baa (rcu_read_lock){....}, at:
debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435
1 lock held by rsyslogd/7722:
#0: 00000000d80d9cce (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
fs/file.c:767
2 locks held by getty/7844:
#0: 0000000093e8920c (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000007be9e86 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7845:
#0: 000000005ab4afc7 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000bac905d5 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7846:
#0: 00000000e51aa53c (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000a79ca5ac (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7847:
#0: 00000000c3c8283f (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000be86a40e (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7848:
#0: 00000000e9159ec4 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000060bd9fb6 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7849:
#0: 000000004cdd2bcb (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000c55848ff (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7850:
#0: 000000008213983a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000030beb2a9 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
1 lock held by syz-executor.0/7888:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.2/7894:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.3/7898:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.4/7902:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.5/7905:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/8853:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/8855:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.2/12379:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/14496:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
5 locks held by syz-executor.1/21003:
#0: 0000000009f16018 (&sig->cred_guard_mutex){+.+.}, at:
__do_sys_perf_event_open+0x6e1/0x2730 kernel/events/core.c:10534
#1: 0000000006a6e9de (&pmus_srcu){....}, at:
perf_event_alloc.part.0+0xd89/0x2e30 kernel/events/core.c:10093
#2: 000000009cc1a1ea (event_mutex){+.+.}, at: perf_uprobe_init+0x15d/0x210
kernel/trace/trace_event_perf.c:325
#3: 000000009c065d1b (&uprobe->register_rwsem){+.+.}, at:
__uprobe_register kernel/events/uprobes.c:922 [inline]
#3: 000000009c065d1b (&uprobe->register_rwsem){+.+.}, at:
uprobe_register+0x345/0x710 kernel/events/uprobes.c:941
#4: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
percpu_down_write+0x6a/0x440 kernel/locking/percpu-rwsem.c:145
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1031 Comm: khungtaskd Not tainted 4.19.53+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x9df/0xee0 kernel/hung_task.c:287
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2171 Comm: kworker/u4:3 Not tainted 4.19.53+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:3697 [inline]
RIP: 0010:lock_release+0x382/0xa30 kernel/locking/lockdep.c:3919
Code: 00 00 fc ff df 48 c1 ee 03 80 3c 0e 00 0f 85 d8 05 00 00 49 8d b8 70
08 00 00 4c 8b 20 48 b8 00 00 00 00 00 fc ff df 48 89 f9 <48> c1 e9 03 80
3c 01 00 0f 85 f6 05 00 00 4d 89 a0 70 08 00 00 83
RSP: 0018:ffff8880a4017c18 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff11014802f89 RCX: ffff8880a400aef0
RDX: 0000000000000002 RSI: 1ffff110148015ea RDI: ffff8880a400aef0
RBP: ffff8880a4017cd0 R08: ffff8880a400a680 R09: 0000000000000003
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 938f8b7c615ab79b
R13: ffffffff86d482ca R14: ffffffff8a360660 R15: ffff8880a4017ca8
FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000013b7000 CR3: 00000000917a4000 CR4: 00000000001406f0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:681 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline]
batadv_nc_worker+0x225/0x760 net/batman-adv/network-coding.c:730
process_one_work+0x989/0x1750 kernel/workqueue.c:2153
worker_thread+0x98/0xe40 kernel/workqueue.c:2296
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 9f31eb60 Linux 4.19.53
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13e54fc6a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a36b9832db62b25
dashboard link: https://syzkaller.appspot.com/bug?extid=10ae74e4dd99c5aa3ec6
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+10ae74...@syzkaller.appspotmail.com
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
INFO: task syz-executor.0:7888 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D23008 7888 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: Bad RIP value.
RSP: 002b:00007fffa11098c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fffa11098c0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fffa1109900 R08: 0000000000000001 R09: 0000000002277940
R10: 0000000002277c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffa1109950
INFO: task syz-executor.2:7894 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D23592 7894 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: Bad RIP value.
RSP: 002b:00007ffcadc50850 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcadc50850 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcadc50890 R08: 0000000000000001 R09: 0000000001a59940
R10: 0000000001a59c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcadc508e0
INFO: task syz-executor.3:7898 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D23592 7898 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007ffec1d07860 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffec1d07860 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffec1d078a0 R08: 0000000000000001 R09: 0000000001998940
R10: 0000000001998c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffec1d078f0
INFO: task syz-executor.4:7902 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D23592 7902 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007fff35c102b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff35c102b0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff35c102f0 R08: 0000000000000001 R09: 0000000002951940
R10: 0000000002951c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff35c10340
INFO: task syz-executor.5:7905 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D23592 7905 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45789a
Code: bc 24 10 02 00 00 48 39 3b 75 8c 48 89 23 eb 87 64 48 8b 0c 25 f8 ff
ff ff 48 8d 84 24 78 fc ff ff 48 3b 41 10 76 7d 48 81 ec <08> 04 00 00 48
89 ac 24 00 04 00 00 48 8d ac 24 00 04 00 00 48 8b
RSP: 002b:00007ffe7ea010f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe7ea010f0 RCX: 000000000045789a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe7ea01130 R08: 0000000000000001 R09: 0000000002608940
R10: 0000000002608c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe7ea01180
INFO: task udevd:8853 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27520 8853 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 0000000000002295 R09: 0000000000002295
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:8855 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27712 8855 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 0000000000002297 R09: 0000000000002297
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:14496 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D27776 14496 3593 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline]
__percpu_down_read+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:430 [inline]
dup_mm kernel/fork.c:1283 [inline]
copy_mm kernel/fork.c:1339 [inline]
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
copy_process kernel/fork.c:1689 [inline]
_do_fork+0x257/0xfd0 kernel/fork.c:2202
__do_sys_clone kernel/fork.c:2309 [inline]
__se_sys_clone kernel/fork.c:2303 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2303
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1b0c692f46
Code: Bad RIP value.
RSP: 002b:00007ffef908f0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffef908f0c0 RCX: 00007f1b0c692f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffef908f120 R08: 00000000000038a0 R09: 00000000000038a0
R10: 00007f1b0cfafa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef908f0e0 R14: 0000000000000005 R15: 0000000000000005
INFO: task syz-executor.1:21003 blocked for more than 140 seconds.
Not tainted 4.19.53+ #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28032 21003 7892 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x80d/0x1c70 kernel/sched/core.c:3474
schedule+0x92/0x1c0 kernel/sched/core.c:3518
percpu_down_write+0x342/0x440 kernel/locking/percpu-rwsem.c:162
register_for_each_vma+0x8c/0xde0 kernel/events/uprobes.c:797
__uprobe_register kernel/events/uprobes.c:926 [inline]
uprobe_register+0x3d6/0x710 kernel/events/uprobes.c:941
probe_event_enable+0x42d/0xbd0 kernel/trace/trace_uprobe.c:915
trace_uprobe_register+0x4b5/0x950 kernel/trace/trace_uprobe.c:1200
perf_trace_event_reg kernel/trace/trace_event_perf.c:124 [inline]
perf_trace_event_init+0x4f3/0x980 kernel/trace/trace_event_perf.c:199
perf_uprobe_init+0x168/0x210 kernel/trace/trace_event_perf.c:326
perf_uprobe_event_init+0xff/0x190 kernel/events/core.c:8517
perf_try_init_event+0x131/0x2f0 kernel/events/core.c:9792
perf_init_event kernel/events/core.c:9823 [inline]
perf_event_alloc.part.0+0x1d3b/0x2e30 kernel/events/core.c:10097
perf_event_alloc kernel/events/core.c:10453 [inline]
__do_sys_perf_event_open+0x842/0x2730 kernel/events/core.c:10554
__se_sys_perf_event_open kernel/events/core.c:10443 [inline]
__x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10443
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: d3 ee 40 80 ff f8 77 05 48 8b 3f eb 08 48 8b 7c 1f f8 48 d3 ef 48 29
f7 48 d3 e7 0f 94 00 c3 cc cc 48 8b 74 24 08 48 8b 5c 24 <10> 48 8b 7c 24
18 48 8b 54 24 20 4c 8d 4c 24 28 e9 02 00 00 00 cc
RSP: 002b:00007f8ebe5cbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f8ebe5cc6d4
R13: 00000000004c5f2a R14: 00000000004da8c8 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1031:
#0: 00000000ec4f7baa (rcu_read_lock){....}, at:
debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435
1 lock held by rsyslogd/7722:
#0: 00000000d80d9cce (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
fs/file.c:767
2 locks held by getty/7844:
#0: 0000000093e8920c (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000007be9e86 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7845:
#0: 000000005ab4afc7 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000bac905d5 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7846:
#0: 00000000e51aa53c (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000a79ca5ac (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7847:
#0: 00000000c3c8283f (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000be86a40e (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7848:
#0: 00000000e9159ec4 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000060bd9fb6 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7849:
#0: 000000004cdd2bcb (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000c55848ff (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7850:
#0: 000000008213983a (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 0000000030beb2a9 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
1 lock held by syz-executor.0/7888:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.2/7894:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.3/7898:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.4/7902:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.5/7905:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/8853:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/8855:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by syz-executor.2/12379:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
1 lock held by udevd/14496:
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:430
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1283
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1339
[inline]
#0: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
copy_process.part.0+0x2b6c/0x7a30 kernel/fork.c:1892
5 locks held by syz-executor.1/21003:
#0: 0000000009f16018 (&sig->cred_guard_mutex){+.+.}, at:
__do_sys_perf_event_open+0x6e1/0x2730 kernel/events/core.c:10534
#1: 0000000006a6e9de (&pmus_srcu){....}, at:
perf_event_alloc.part.0+0xd89/0x2e30 kernel/events/core.c:10093
#2: 000000009cc1a1ea (event_mutex){+.+.}, at: perf_uprobe_init+0x15d/0x210
kernel/trace/trace_event_perf.c:325
#3: 000000009c065d1b (&uprobe->register_rwsem){+.+.}, at:
__uprobe_register kernel/events/uprobes.c:922 [inline]
#3: 000000009c065d1b (&uprobe->register_rwsem){+.+.}, at:
uprobe_register+0x345/0x710 kernel/events/uprobes.c:941
#4: 00000000b283dd72 (&dup_mmap_sem){++++}, at:
percpu_down_write+0x6a/0x440 kernel/locking/percpu-rwsem.c:145
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1031 Comm: khungtaskd Not tainted 4.19.53+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x9df/0xee0 kernel/hung_task.c:287
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2171 Comm: kworker/u4:3 Not tainted 4.19.53+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:3697 [inline]
RIP: 0010:lock_release+0x382/0xa30 kernel/locking/lockdep.c:3919
Code: 00 00 fc ff df 48 c1 ee 03 80 3c 0e 00 0f 85 d8 05 00 00 49 8d b8 70
08 00 00 4c 8b 20 48 b8 00 00 00 00 00 fc ff df 48 89 f9 <48> c1 e9 03 80
3c 01 00 0f 85 f6 05 00 00 4d 89 a0 70 08 00 00 83
RSP: 0018:ffff8880a4017c18 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff11014802f89 RCX: ffff8880a400aef0
RDX: 0000000000000002 RSI: 1ffff110148015ea RDI: ffff8880a400aef0
RBP: ffff8880a4017cd0 R08: ffff8880a400a680 R09: 0000000000000003
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 938f8b7c615ab79b
R13: ffffffff86d482ca R14: ffffffff8a360660 R15: ffff8880a4017ca8
FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000013b7000 CR3: 00000000917a4000 CR4: 00000000001406f0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:681 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline]
batadv_nc_worker+0x225/0x760 net/batman-adv/network-coding.c:730
process_one_work+0x989/0x1750 kernel/workqueue.c:2153
worker_thread+0x98/0xe40 kernel/workqueue.c:2296
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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syzbot
Oct 25, 2019, 4:44:05 AM10/25/19
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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