NOHZ: local_softirq_pending 08
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
INFO: task syz-executor.1:630 blocked for more than 140 seconds.
Not tainted 4.14.194-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28912 630 7684 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1731
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common+0x272/0x430 kernel/sched/completion.c:123
ucma_close+0xfc/0x340 drivers/infiniband/core/ucma.c:1749
__fput+0x25f/0x7a0 fs/file_table.c:210
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x416e21
RSP: 002b:00007ffc725ece20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 000000000000000b RCX: 0000000000416e21
RDX: 0000000000000000 RSI: 000000000000086e RDI: 000000000000000a
RBP: 0000000000000001 R08: 00000000216a486e R09: 00000000216a4872
R10: 00007ffc725ecf10 R11: 0000000000000293 R12: 00000000011912b8
R13: 000000000007ddcc R14: ffffffffffffffff R15: 000000000118cf4c
Showing all locks held in the system:
1 lock held by khungtaskd/1060:
#0: (tasklist_lock){.+.+}, at: [<ffffffff814777f4>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1060 Comm: khungtaskd Not tainted 4.14.194-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3652 Comm: systemd-journal Not tainted 4.14.194-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880943a2340 task.stack: ffff8880943a8000
RIP: 0010:unwind_get_return_address arch/x86/kernel/unwind_orc.c:252 [inline]
RIP: 0010:unwind_get_return_address+0x6a/0x90 arch/x86/kernel/unwind_orc.c:247
RSP: 0018:ffff8880943af810 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8880943af838 RCX: 0000000000000000
RDX: 1ffff11012875f10 RSI: ffff8880943af728 RDI: ffffffff818518f1
RBP: ffff8880943af880 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880943afb10 R11: 0000000000000001 R12: ffff8880943af8c0
R13: 0000000000000000 R14: ffff8880aa50b380 R15: 0000000000000010
FS: 00007f1a14e508c0(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a12469020 CR3: 000000009453c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__save_stack_trace+0xa0/0x160 arch/x86/kernel/stacktrace.c:45
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
slab_post_alloc_hook mm/slab.h:442 [inline]
slab_alloc mm/slab.c:3390 [inline]
kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550
kmem_cache_zalloc include/linux/slab.h:651 [inline]
file_alloc_security security/selinux/hooks.c:368 [inline]
selinux_file_alloc_security+0xaf/0x190 security/selinux/hooks.c:3475
security_file_alloc+0x66/0xa0 security/security.c:874
get_empty_filp+0x15c/0x3e0 fs/file_table.c:129
path_openat+0x84/0x2970 fs/namei.c:3545
do_filp_open+0x179/0x3c0 fs/namei.c:3603
do_sys_open+0x296/0x410 fs/open.c:1081
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f1a143e0840
RSP: 002b:00007ffd907d7678 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffd907d7980 RCX: 00007f1a143e0840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055d4b3167530
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055d4b315b060 R14: 00007ffd907d7940 R15: 000055d4b3168c60
Code: c1 ea 03 80 3c 02 00 75 32 48 8b 7b 48 e8 ef 3a 14 00 85 c0 74 d3 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 18 48 8b 43 48 5b 5d c3 e8 68 1c 5d 00 eb a8 48 89 ef e8 ce