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) 2.35.1 kernel signature: c50942477fc15532e39898dfcf526e357e3727e5cbebb13d6a4d01c74da87bba run #0: crashed: BUG: sleeping function called from invalid context in lock_sock_nested run #1: crashed: INFO: task hung in sys_io_destroy run #2: crashed: INFO: task hung in sys_io_destroy run #3: crashed: INFO: task hung in sys_io_destroy run #4: crashed: INFO: task hung in sys_io_destroy run #5: crashed: INFO: task hung in sys_io_destroy run #6: crashed: INFO: task hung in sys_io_destroy run #7: crashed: INFO: task hung in sys_io_destroy run #8: crashed: INFO: task hung in sys_io_destroy run #9: crashed: INFO: task hung in sys_io_destroy run #10: crashed: INFO: task hung in sys_io_destroy run #11: crashed: INFO: task hung in sys_io_destroy run #12: crashed: INFO: task hung in sys_io_destroy run #13: crashed: INFO: task hung in sys_io_destroy run #14: crashed: INFO: task hung in sys_io_destroy run #15: crashed: INFO: task hung in sys_io_destroy run #16: crashed: INFO: task hung in sys_io_destroy run #17: crashed: INFO: task hung in sys_io_destroy run #18: crashed: INFO: task hung in sys_io_destroy run #19: crashed: INFO: task hung in sys_io_destroy testing current HEAD d992fe5318d8d7af9510b879439a3c7f283da442 testing commit d992fe5318d8d7af9510b879439a3c7f283da442 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: f0cf6078683e176b331bbcfcc0436b3fbc573ae6a8b4f698f5fc2a25693c09b3 all runs: crashed: INFO: task hung in sys_io_destroy revisions tested: 2, total time: 25m15.986305472s (build: 12m47.128754188s, test: 11m54.001953479s) the crash still happens on HEAD commit msg: Merge tag 'soc-fixes-5.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc crash: INFO: task hung in sys_io_destroy INFO: task syz-executor.0:10187 blocked for more than 143 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29408 pid:10187 ppid: 10186 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f2397f95188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2397f74000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffdeb3d0eaf R14: 00007f2397f95300 R15: 0000000000022000 INFO: task syz-executor.5:10191 blocked for more than 143 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29848 pid:10191 ppid: 10190 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f20ccc76188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f20ccc55000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffb294a9af R14: 00007f20ccc76300 R15: 0000000000022000 INFO: task syz-executor.5:10236 blocked for more than 143 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29464 pid:10236 ppid: 10235 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f20ccc76188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f20ccc55000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffb294a9af R14: 00007f20ccc76300 R15: 0000000000022000 INFO: task syz-executor.2:10268 blocked for more than 144 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29408 pid:10268 ppid: 10267 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007fd8ffa9a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd8ffa79000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe866355ff R14: 00007fd8ffa9a300 R15: 0000000000022000 INFO: task syz-executor.0:10297 blocked for more than 144 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29848 pid:10297 ppid: 10296 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f2397f95188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2397f74000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffdeb3d0eaf R14: 00007f2397f95300 R15: 0000000000022000 INFO: task syz-executor.4:10304 blocked for more than 144 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29808 pid:10304 ppid: 10303 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007fba61f7e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fba61f5d000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffec54400ff R14: 00007fba61f7e300 R15: 0000000000022000 INFO: task syz-executor.3:10315 blocked for more than 145 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29808 pid:10315 ppid: 10309 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007fa8249a8188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fa824987000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffeb6a713af R14: 00007fa8249a8300 R15: 0000000000022000 INFO: task syz-executor.5:10322 blocked for more than 145 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29848 pid:10322 ppid: 10321 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f20ccc76188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f20ccc55000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffb294a9af R14: 00007f20ccc76300 R15: 0000000000022000 INFO: task syz-executor.2:10337 blocked for more than 145 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29808 pid:10337 ppid: 10336 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007fd8ffa9a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd8ffa79000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe866355ff R14: 00007fd8ffa9a300 R15: 0000000000022000 INFO: task syz-executor.0:10357 blocked for more than 145 seconds. Not tainted 5.14.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29808 pid:10357 ppid: 10355 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 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+0x176/0x280 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:00007f2397f95188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2397f74000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffdeb3d0eaf R14: 00007f2397f95300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1606: #0: ffffffff8ab72940 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8149: #0: ffff8880156f8870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:974 1 lock held by syz-executor.0/8836: #0: ffff8880b9e51ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:460 [inline] #0: ffff8880b9e51ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1307 [inline] #0: ffff8880b9e51ad8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1610 [inline] #0: ffff8880b9e51ad8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x233/0x26b0 kernel/sched/core.c:5852 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1606 Comm: khungtaskd Not tainted 5.14.0-rc6-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:105 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 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+0x92e/0xc40 kernel/hung_task.c:295 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8836 Comm: syz-executor.0 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:check_preemption_disabled+0x2f/0xd0 lib/smp_processor_id.c:19 Code: 83 ec 08 65 44 8b 25 d8 83 a2 77 65 8b 05 69 de a2 77 a9 ff ff ff 7f 74 0c 48 83 c4 08 44 89 e0 5b 5d 41 5c c3 48 89 34 24 9c <58> f6 c4 02 74 e9 48 89 fd e8 b3 0d 28 fb 84 c0 75 dd 65 48 8b 1c RSP: 0018:ffffc9000178fee0 EFLAGS: 00000046 RAX: 0000000080000000 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff88d39a60 RDI: ffffffff891ff7c0 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8c7d0257 R10: fffffbfff18fa04a R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000000000159f400(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da4 CR3: 000000001f59e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __context_tracking_exit+0x65/0x90 kernel/context_tracking.c:165 user_exit_irqoff include/linux/context_tracking.h:47 [inline] __enter_from_user_mode kernel/entry/common.c:22 [inline] syscall_enter_from_user_mode+0x4c/0x70 kernel/entry/common.c:104 do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x464a77 Code: 89 7c 24 10 48 89 4c 24 18 e8 d5 44 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 05 45 02 00 8b 44 RSP: 002b:00007ffdeb3d10d0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000572 RCX: 0000000000464a77 RDX: 0000000040000001 RSI: 00007ffdeb3d116c RDI: 00000000ffffffff RBP: 00007ffdeb3d116c R08: 0000000000000000 R09: 00007ffdeb3d3080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000370e5 R14: 0000000000000001 R15: 00007ffdeb3d11d0 ---------------- Code disassembly (best guess): 0: 83 ec 08 sub $0x8,%esp 3: 65 44 8b 25 d8 83 a2 mov %gs:0x77a283d8(%rip),%r12d # 0x77a283e3 a: 77 b: 65 8b 05 69 de a2 77 mov %gs:0x77a2de69(%rip),%eax # 0x77a2de7b 12: a9 ff ff ff 7f test $0x7fffffff,%eax 17: 74 0c je 0x25 19: 48 83 c4 08 add $0x8,%rsp 1d: 44 89 e0 mov %r12d,%eax 20: 5b pop %rbx 21: 5d pop %rbp 22: 41 5c pop %r12 24: c3 retq 25: 48 89 34 24 mov %rsi,(%rsp) 29: 9c pushfq * 2a: 58 pop %rax <-- trapping instruction 2b: f6 c4 02 test $0x2,%ah 2e: 74 e9 je 0x19 30: 48 89 fd mov %rdi,%rbp 33: e8 b3 0d 28 fb callq 0xfb280deb 38: 84 c0 test %al,%al 3a: 75 dd jne 0x19 3c: 65 gs 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 1c .byte 0x1c