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 9eaa88c7036eda3f6c215f87ca693594cf90559b testing commit 9eaa88c7036eda3f6c215f87ca693594cf90559b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d1cea50ee84cd0b92ac5b56b6f8600743cd04a5664975a0cb8d8b07b2aa22ade all runs: crashed: INFO: task hung in sys_io_destroy revisions tested: 2, total time: 24m57.074188683s (build: 12m54.524909493s, test: 11m20.72787695s) the crash still happens on HEAD commit msg: Merge tag 'libata-5.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata crash: INFO: task hung in sys_io_destroy INFO: task syz-executor.5:4080 blocked for more than 143 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29568 pid: 4080 ppid: 4079 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007fcf42928188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fcf42907000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffde2210a4f R14: 00007fcf42928300 R15: 0000000000022000 INFO: task syz-executor.0:4083 blocked for more than 143 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29856 pid: 4083 ppid: 4082 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007fd047e05188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd047de4000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce5e4a8cf R14: 00007fd047e05300 R15: 0000000000022000 INFO: task syz-executor.4:4096 blocked for more than 143 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29856 pid: 4096 ppid: 4094 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007f0dee294188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0dee273000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf18fcd9f R14: 00007f0dee294300 R15: 0000000000022000 INFO: task syz-executor.3:4118 blocked for more than 144 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29672 pid: 4118 ppid: 4117 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007ff58abe9188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ff58abc8000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe27cdc21f R14: 00007ff58abe9300 R15: 0000000000022000 INFO: task syz-executor.0:4160 blocked for more than 144 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29464 pid: 4160 ppid: 4159 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007fd047e05188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd047de4000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce5e4a8cf R14: 00007fd047e05300 R15: 0000000000022000 INFO: task syz-executor.4:4179 blocked for more than 144 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29544 pid: 4179 ppid: 4178 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007f0dee294188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0dee273000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf18fcd9f R14: 00007f0dee294300 R15: 0000000000022000 INFO: task syz-executor.4:4279 blocked for more than 144 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29856 pid: 4279 ppid: 4278 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007f0dee294188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0dee273000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf18fcd9f R14: 00007f0dee294300 R15: 0000000000022000 INFO: task syz-executor.0:4285 blocked for more than 145 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29856 pid: 4285 ppid: 4284 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007fd047e05188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd047de4000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce5e4a8cf R14: 00007fd047e05300 R15: 0000000000022000 INFO: task syz-executor.3:4286 blocked for more than 145 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29856 pid: 4286 ppid: 4283 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007ff58abe9188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ff58abc8000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe27cdc21f R14: 00007ff58abe9300 R15: 0000000000022000 INFO: task syz-executor.0:4316 blocked for more than 145 seconds. Not tainted 5.16.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29776 pid: 4316 ppid: 4315 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __do_sys_io_destroy fs/aio.c:1402 [inline] __se_sys_io_destroy fs/aio.c:1380 [inline] __x64_sys_io_destroy+0x15a/0x1b0 fs/aio.c:1380 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:00007fd047e05188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd047de4000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce5e4a8cf R14: 00007fd047e05300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:0/8: #0: ffff8880b9e39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:478 #1: ffffc90000cd7db8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273 1 lock held by khungtaskd/27: #0: ffffffff8ab78b40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by udevd/3007: 2 locks held by getty/3318: #0: ffff88807e233098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900027962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2113 4 locks held by kworker/1:8/4059: #0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:478 [inline] #0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1316 [inline] #0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1614 [inline] #0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26c0 kernel/sched/core.c:6167 #1: ffff8880b9f279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880 #2: ffff8880b9f28298 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x49/0x1a0 kernel/time/timer.c:946 #3: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:478 [inline] #3: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1316 [inline] #3: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1614 [inline] #3: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: ttwu_queue kernel/sched/core.c:3794 [inline] #3: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: try_to_wake_up+0x4a8/0x1370 kernel/sched/core.c:4119 1 lock held by syz-executor.3/5800: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc5-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+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0x88c/0xbf0 kernel/hung_task.c:295 kthread+0x3ab/0x480 kernel/kthread.c:327 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: 2515 Comm: kworker/u4:6 Not tainted 5.16.0-rc5-syzkaller #0 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:5343 [inline] RIP: 0010:lock_release+0x2ab/0x720 kernel/locking/lockdep.c:5657 Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e c3 03 00 00 66 83 6b 22 10 66 f7 43 22 f0 ff 0f 85 0c 01 00 00 4c 89 f2 44 8b 64 24 50 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 RSP: 0018:ffffc9000b26fbc0 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff88802133e0b0 RCX: ffffc9000b26fc10 RDX: ffff88802133e058 RSI: 0000000000000000 RDI: ffff88802133e0d2 RBP: 1ffff9200164df7a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 000000000000b946 R12: 0000000000000002 R13: 0000000000000003 R14: ffff88802133e058 R15: ffff88802133d640 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff7385afe8 CR3: 000000000a88e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:273 [inline] rcu_read_unlock include/linux/rcupdate.h:721 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline] batadv_nc_worker+0x668/0xd70 net/batman-adv/network-coding.c:723 process_one_work+0x87f/0x1450 kernel/workqueue.c:2298 worker_thread+0x598/0x1040 kernel/workqueue.c:2445 kthread+0x3ab/0x480 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 03 0f add (%rdi),%ecx 2: b6 04 mov $0x4,%dh 4: 02 84 c0 74 08 3c 03 add 0x33c0874(%rax,%rax,8),%al b: 0f 8e c3 03 00 00 jle 0x3d4 11: 66 83 6b 22 10 subw $0x10,0x22(%rbx) 16: 66 f7 43 22 f0 ff testw $0xfff0,0x22(%rbx) 1c: 0f 85 0c 01 00 00 jne 0x12e 22: 4c 89 f2 mov %r14,%rdx 25: 44 8b 64 24 50 mov 0x50(%rsp),%r12d * 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 48 c1 ea 03 shr $0x3,%rdx 38: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 3c: 84 c0 test %al,%al 3e: 74 08 je 0x48