bisecting fixing commit since 1d67c8d993baf8ab6be8a2154b1a94ec1311c869
building syzkaller on f115ae985a399ddce060f448097b8068450a8f48
testing commit 1d67c8d993baf8ab6be8a2154b1a94ec1311c869
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 9f1e9276e7f0b496472355ea540b0ce12b53571d2ad4da8708c3118a771c7a81
all runs: crashed: INFO: task hung in sys_io_destroy
testing current HEAD 551acdc3c3d2b6bc97f11e31dcf960bc36343bfc
testing commit 551acdc3c3d2b6bc97f11e31dcf960bc36343bfc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 2133f014bb9141b0e3c67a7cabfad6b02d6106453629ba158ad5a5da3a168985
all runs: crashed: INFO: task hung in sys_io_destroy
revisions tested: 2, total time: 24m27.482658194s (build: 12m8.286741926s, test: 11m27.449681266s)
the crash still happens on HEAD
commit msg: Merge tag 'net-5.17-final' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
crash: INFO: task hung in sys_io_destroy
INFO: task syz-executor.1:4100 blocked for more than 143 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29808 pid: 4100 ppid: 4099 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f2c945e1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2c945c0000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff559eed4f R14: 00007f2c945e1300 R15: 0000000000022000
INFO: task syz-executor.2:4143 blocked for more than 143 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29808 pid: 4143 ppid: 4142 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fd19fd6d188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd19fd4c000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff30202e3f R14: 00007fd19fd6d300 R15: 0000000000022000
INFO: task syz-executor.0:4169 blocked for more than 143 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29808 pid: 4169 ppid: 4168 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fbd54c41188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fbd54c20000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffda966b0ff R14: 00007fbd54c41300 R15: 0000000000022000
INFO: task syz-executor.5:4181 blocked for more than 144 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29808 pid: 4181 ppid: 4180 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fb036ef5188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fb036ed4000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe299d71ff R14: 00007fb036ef5300 R15: 0000000000022000
INFO: task syz-executor.3:4184 blocked for more than 144 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:29808 pid: 4184 ppid: 4183 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f4199830188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f419980f000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff8ab65f8f R14: 00007f4199830300 R15: 0000000000022000
INFO: task syz-executor.0:4238 blocked for more than 144 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29808 pid: 4238 ppid: 4237 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fbd54c41188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fbd54c20000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffda966b0ff R14: 00007fbd54c41300 R15: 0000000000022000
INFO: task syz-executor.1:4258 blocked for more than 144 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29808 pid: 4258 ppid: 4257 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f2c945e1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2c945c0000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff559eed4f R14: 00007f2c945e1300 R15: 0000000000022000
INFO: task syz-executor.4:4261 blocked for more than 145 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29432 pid: 4261 ppid: 4260 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fb6daaa6188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fb6daa85000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffea811687f R14: 00007fb6daaa6300 R15: 0000000000022000
INFO: task syz-executor.5:4266 blocked for more than 145 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29808 pid: 4266 ppid: 4265 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fb036ef5188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fb036ed4000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe299d71ff R14: 00007fb036ef5300 R15: 0000000000022000
INFO: task syz-executor.3:4269 blocked for more than 145 seconds.
Not tainted 5.17.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28968 pid: 4269 ppid: 4268 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
__do_sys_io_destroy fs/aio.c:1429 [inline]
__se_sys_io_destroy fs/aio.c:1407 [inline]
__x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1407
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f4199830188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f419980f000
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff8ab65f8f R14: 00007f4199830300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8ad792e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
1 lock held by udevd/3003:
#0: ffff8880b9f39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:489
2 locks held by getty/3313:
#0: ffff888147f37098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900027662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2075
5 locks held by kworker/1:6/3969:
#0: ffff8880b9f39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:489 [inline]
#0: ffff8880b9f39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1318 [inline]
#0: ffff8880b9f39c18 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1616 [inline]
#0: ffff8880b9f39c18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x2680 kernel/sched/core.c:6218
#1: ffff8880b9f27948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:891
#2: ffff8880b9f28270 (krc.lock){..-.}-{2:2}, at: kfree_rcu_monitor+0x2f/0x830 kernel/rcu/tree.c:3373
#3: ffff8880b9f28498 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x49/0x1a0 kernel/time/timer.c:946
#4: ffffffff8f87fa88 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:980 [inline]
#4: ffffffff8f87fa88 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1023
2 locks held by kworker/u4:6/4161:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:369
kthread+0x299/0x340 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4161 Comm: kworker/u4:6 Not tainted 5.17.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x58/0xb0 kernel/rcu/tree.c:1128
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 75 51 48 03 1c ed a0 e8 86 8a 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01
RSP: 0018:ffffc90002b2fb78 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: ffff8880b9f3abd0 RCX: ffffffff815458c8
RDX: 0000000000000000 RSI: ffffffff894262e0 RDI: ffffffff8a86e8a8
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ca52817
R10: fffffbfff194a502 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8ad792e0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffea8113c78 CR3: 000000001eef8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5610
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x108/0xd70 net/batman-adv/network-coding.c:719
process_one_work+0x879/0x1410 kernel/workqueue.c:2307
worker_thread+0x5a0/0xf60 kernel/workqueue.c:2454
kthread+0x299/0x340 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 48 89 fa mov %rdi,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
b: 75 51 jne 0x5e
d: 48 03 1c ed a0 e8 86 add -0x75791760(,%rbp,8),%rbx
14: 8a
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 da mov %rbx,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
* 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction
2d: 83 e0 07 and $0x7,%eax
30: 83 c0 03 add $0x3,%eax
33: 38 d0 cmp %dl,%al
35: 7c 04 jl 0x3b
37: 84 d2 test %dl,%dl
39: 75 19 jne 0x54
3b: 8b 03 mov (%rbx),%eax
3d: 83 e0 01 and $0x1,%eax