INFO: task syz-executor.4:24967 blocked for more than 143 seconds.
Not tainted 5.6.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D28328 24967 9892 0x80004004
Call Trace:
schedule+0xd0/0x2a0 kernel/sched/core.c:4154
schedule_timeout+0x6db/0xba0 kernel/time/timer.c:1871
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion+0x26a/0x3c0 kernel/sched/completion.c:136
io_queue_file_removal+0x1af/0x1e0 fs/io_uring.c:5826
__io_sqe_files_update.isra.0+0x3a1/0xb00 fs/io_uring.c:5867
io_sqe_files_update fs/io_uring.c:5918 [inline]
__io_uring_register+0x377/0x2c00 fs/io_uring.c:7131
__do_sys_io_uring_register fs/io_uring.c:7202 [inline]
__se_sys_io_uring_register fs/io_uring.c:7184 [inline]
__x64_sys_io_uring_register+0x192/0x560 fs/io_uring.c:7184
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007f6bd1ae1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f6bd1ae26d4 RCX: 000000000045c849
RDX: 0000000020000300 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000a1 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000000001fe R14: 00000000004d2f58 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/1130:
#0: ffffffff897accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5331
1 lock held by rsyslogd/9741:
#0: ffff8880969f61a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:821
2 locks held by getty/9831:
#0: ffff88809d41c090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc900017cb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9832:
#0: ffff88809a26b090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc900017db2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9833:
#0: ffff888095e4a090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc9000184b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9834:
#0: ffff8880a2ea8090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc900017eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9835:
#0: ffff8880a7eac090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc9000180b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9836:
#0: ffff88808e01d090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc9000182b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by getty/9837:
#0: ffff88808f2b6090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc9000178b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.4/24967:
#0: ffff888095307320 (&ctx->uring_lock){+.+.}, at: __do_sys_io_uring_register fs/io_uring.c:7201 [inline]
#0: ffff888095307320 (&ctx->uring_lock){+.+.}, at: __se_sys_io_uring_register fs/io_uring.c:7184 [inline]
#0: ffff888095307320 (&ctx->uring_lock){+.+.}, at: __x64_sys_io_uring_register+0x181/0x560 fs/io_uring.c:7184
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1130 Comm: khungtaskd Not tainted 5.6.0-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:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xa8c/0x1010 kernel/hung_task.c:289
kthread+0x357/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:deref_stack_reg+0x9a/0xe0 arch/x86/kernel/unwind_orc.c:353
Code: 00 00 00 00 fc ff df 48 c7 04 03 00 00 00 00 44 89 c0 48 8b 4c 24 58 65 48 33 0c 25 28 00 00 00 75 37 48 83 c4 60 5b 5d 41 5c <41> 5d c3 48 8d 74 24 20 48 89 ef e8 46 ff ff ff 4c 89 e0 48 8b 6c
RSP: 0018:ffffc90000007698 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 1ffff92000000edd RCX: 0000000000000000
RDX: ffffc90000007fc8 RSI: ffffc90000007640 RDI: ffffc90000007fc0
RBP: 0000000000000002 R08: 0000000000000001 R09: ffffffff8acc6288
R10: 000000000000e0dc R11: 000000000006e027 R12: ffffc900000077c8
R13: dffffc0000000000 R14: ffffc900000077d0 R15: ffffc90000007780
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f184387f000 CR3: 0000000094ebb000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xbfa/0x19d0 arch/x86/kernel/unwind_orc.c:499
arch_stack_walk+0x74/0xd0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
save_stack+0x1b/0x80 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:515 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slab.c:3263 [inline]
kmem_cache_alloc_node+0x13c/0x760 mm/slab.c:3575
__alloc_skb+0xba/0x5a0 net/core/skbuff.c:198
alloc_skb include/linux/skbuff.h:1081 [inline]
new_skb+0x24/0x1c0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline]
aoecmd_cfg+0x18b/0x5f0 drivers/block/aoe/aoecmd.c:1372
call_timer_fn+0x195/0x760 kernel/time/timer.c:1404
expire_timers kernel/time/timer.c:1449 [inline]
__run_timers kernel/time/timer.c:1773 [inline]
__run_timers kernel/time/timer.c:1740 [inline]
run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786
__do_softirq+0x26c/0x99d kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x192/0x1d0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:546 [inline]
smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1146
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 94 51 4c 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 51 4c 00 fb f4 cc 41 56 41 55 41 54 55 53 e8 53 f2 a3 f9 e8 8e 2e d6 fb 0f 1f
RSP: 0018:ffffffff89607d98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12e769b RBX: ffffffff8967a480 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8967ad14
RBP: dffffc0000000000 R08: ffffffff8967a480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff12cf490
R13: 0000000000000000 R14: ffffffff8a65d1c0 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline]
default_idle+0x49/0x350 arch/x86/kernel/process.c:695
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x393/0x690 kernel/sched/idle.c:269
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
start_kernel+0x867/0x8a1 init/main.c:998
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242