INFO: task syz-executor.3:13533 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:28496 pid:13533 ppid: 6560 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x38c/0xb10 drivers/block/nbd.c:1511
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f58188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af5f60 RCX: 00007f9e259e2ae9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f58300 R15: 0000000000022000
INFO: task syz-executor.3:13533 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28496 pid:13533 ppid: 6560 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x38c/0xb10 drivers/block/nbd.c:1511
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f58188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af5f60 RCX: 00007f9e259e2ae9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f58300 R15: 0000000000022000
INFO: task syz-executor.3:13535 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:28328 pid:13535 ppid: 6560 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f37188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af6020 RCX: 00007f9e259e2ae9
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000005
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f37300 R15: 0000000000022000
INFO: task syz-executor.3:13535 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28328 pid:13535 ppid: 6560 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f37188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af6020 RCX: 00007f9e259e2ae9
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000005
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f37300 R15: 0000000000022000
INFO: task syz-executor.3:13539 can't die for more than 144 seconds.
task:syz-executor.3 state:D stack:29592 pid:13539 ppid: 6560 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f16188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af60e0 RCX: 00007f9e259e2ae9
RDX: 0000000000000000 RSI: 000000000000ab04 RDI: 0000000000000005
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f16300 R15: 0000000000022000
INFO: task syz-executor.3:13539 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:29592 pid:13539 ppid: 6560 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f9e259e2ae9
RSP: 002b:00007f9e22f16188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e25af60e0 RCX: 00007f9e259e2ae9
RDX: 0000000000000000 RSI: 000000000000ab04 RDI: 0000000000000005
RBP: 00007f9e25a3cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf640ddff R14: 00007f9e22f16300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6436:
#0: ffff8880780baaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6461:
#0: ffff8880127b2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b682e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:9/15477:
1 lock held by syz-executor.3/13533:
#0: ffff88801a69c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
1 lock held by syz-executor.3/13535:
#0: ffff88801a69c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
1 lock held by syz-executor.3/13539:
#0: ffff88801a69c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211118-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 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: 2970 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:deref_stack_reg+0xf8/0x150 arch/x86/kernel/unwind_orc.c:355
Code: ff 41 89 c0 31 c0 45 85 c0 75 27 48 ba 00 00 00 00 00 fc ff df 48 89 d9 48 89 ef e8 12 f9 ff ff 48 c1 e9 03 80 3c 11 00 75 31 <48> 89 03 b8 01 00 00 00 48 83 c4 08 5b 5d 41 5c 41 5d c3 e8 e0 82
RSP: 0018:ffffc9000202f888 EFLAGS: 00000246
RAX: ffff88803313b300 RBX: ffffc9000202fa20 RCX: 1ffff92000405f44
RDX: dffffc0000000000 RSI: ffffc9000202fa68 RDI: ffffc9000202fa68
RBP: ffffc9000202fa68 R08: ffffffff8e0ae0e2 R09: 0000000000000001
R10: fffff52000405f47 R11: 000000000008808a R12: ffffc9000202f9e0
R13: ffffc90002028000 R14: ffffc9000202f9e0 R15: ffffc9000202fa14
FS: 00007fc873faf8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc871082000 CR3: 000000001c7cf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x13f9/0x1ce0 arch/x86/kernel/unwind_orc.c:600
__unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:712
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0x92/0x5e0 mm/slub.c:3529
putname fs/namei.c:270 [inline]
putname+0xfe/0x140 fs/namei.c:256
user_path_at_empty+0x4d/0x60 fs/namei.c:2803
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x127/0x850 fs/open.c:421
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: 0033:0x7fc87326a9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffde971cb38 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffde971fa50 RCX: 00007fc87326a9c7
RDX: 00007fc873cdba00 RSI: 0000000000000000 RDI: 00005607dcf5d9a3
RBP: 00007ffde971cb70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffde971fa50 R15: 00007ffde971d060
----------------
Code disassembly (best guess):
0: ff 41 89 incl -0x77(%rcx)
3: c0 31 c0 shlb $0xc0,(%rcx)
6: 45 85 c0 test %r8d,%r8d
9: 75 27 jne 0x32
b: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
12: fc ff df
15: 48 89 d9 mov %rbx,%rcx
18: 48 89 ef mov %rbp,%rdi
1b: e8 12 f9 ff ff callq 0xfffff932
20: 48 c1 e9 03 shr $0x3,%rcx
24: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1)
28: 75 31 jne 0x5b
* 2a: 48 89 03 mov %rax,(%rbx) <-- trapping instruction
2d: b8 01 00 00 00 mov $0x1,%eax
32: 48 83 c4 08 add $0x8,%rsp
36: 5b pop %rbx
37: 5d pop %rbp
38: 41 5c pop %r12
3a: 41 5d pop %r13
3c: c3 retq
3d: e8 .byte 0xe8
3e: e0 82 loopne 0xffffffc2