INFO: task systemd-udevd:2974 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:systemd-udevd state:D stack:22616 pid: 2974 ppid: 1 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
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7fcac9cf9840
RSP: 002b:00007fffa6e7a5b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fffa6e7a650 RCX: 00007fcac9cf9840
RDX: 000055616eb30fe3 RSI: 00000000000a0800 RDI: 000055616f7c2780
RBP: 00007fffa6e7ab00 R08: 000055616eb30670 R09: 0000000000000010
R10: 00000000000001a0 R11: 0000000000000246 R12: 00007fffa6e7a760
R13: 000055616f7a1010 R14: 000055616f7cfd90 R15: 00007fffa6e7a630
INFO: task systemd-udevd:5979 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:systemd-udevd state:D stack:26928 pid: 5979 ppid: 2974 flags:0x00000000
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
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7fcac9cf9840
RSP: 002b:00007fffa6e7a4e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055616f7b53a0 RCX: 00007fcac9cf9840
RDX: 000055616eb30fe3 RSI: 00000000000a0800 RDI: 000055616f7b70d0
RBP: 00007fffa6e7a660 R08: 000055616eb30670 R09: 0000000000000010
R10: 000055616eb30d0c R11: 0000000000000246 R12: 00007fffa6e7a5b0
R13: 000055616f7a27c0 R14: 0000000000000003 R15: 000000000000000e
INFO: task syz-executor.3:6635 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:28272 pid: 6635 ppid: 6525 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
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
lo_release+0x1ac/0x1f0 drivers/block/loop.c:1761
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
blkdev_close+0x6a/0x80 block/fops.c:515
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f34d9a1172b
RSP: 002b:00007f34d6fb2f30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f34d6fb36bc RCX: 00007f34d9a1172b
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000010
R13: 0000000000000003 R14: 0000000020000260 R15: 0000000000000004
INFO: task syz-executor.3:6635 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:28272 pid: 6635 ppid: 6525 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
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
lo_release+0x1ac/0x1f0 drivers/block/loop.c:1761
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
blkdev_close+0x6a/0x80 block/fops.c:515
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f34d9a1172b
RSP: 002b:00007f34d6fb2f30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f34d6fb36bc RCX: 00007f34d9a1172b
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000010
R13: 0000000000000003 R14: 0000000020000260 R15: 0000000000000004
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 systemd-udevd/2974:
#0: ffff88801a280918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by in:imklog/6223:
3 locks held by kworker/u4:7/10451:
1 lock held by systemd-udevd/5979:
#0: ffff88801a280918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
2 locks held by syz-executor.3/6635:
#0: ffff88801a280918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a274b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
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: 2966 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:kasan_quarantine_reduce+0x24/0x200 mm/kasan/quarantine.c:230
Code: e9 67 ff ff ff 90 55 48 83 ec 20 48 8b 15 84 4b 8f 0e 48 8b 05 75 4b 8f 0e 48 c7 04 24 00 00 00 00 48 c7 44 24 08 00 00 00 00 <48> c7 44 24 10 00 00 00 00 48 c7 44 24 18 00 00 00 00 48 39 c2 77
RSP: 0018:ffffc90001f2fdb8 EFLAGS: 00000286
RAX: 000000000cf0cd80 RBX: ffff8880184b9180 RCX: 0000000000000400
RDX: 000000000cf05b28 RSI: ffff8880184b9180 RDI: ffff888010c42500
RBP: 0000000000400dc0 R08: 0000000000400dc0 R09: ffff8880184b9180
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888010c42500
R13: 0000000000000010 R14: 0000000000400cc0 R15: ffff88801a30da00
FS: 00007f21c9bbf8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21c7281000 CR3: 000000001a061000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
____kasan_kmalloc mm/kasan/common.c:479 [inline]
__kasan_kmalloc+0xbd/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:595 [inline]
kzalloc include/linux/slab.h:724 [inline]
lsm_cred_alloc security/security.c:537 [inline]
security_prepare_creds+0x10e/0x190 security/security.c:1692
prepare_creds+0x56e/0x7b0 kernel/cred.c:291
access_override_creds fs/open.c:351 [inline]
do_faccessat+0x3f4/0x850 fs/open.c:415
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: 0033:0x7f21c8e7a9c7
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:00007ffe71e43118 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffe71e46030 RCX: 00007f21c8e7a9c7
RDX: 00007f21c98eba00 RSI: 0000000000000000 RDI: 0000559d7018a9a3
RBP: 00007ffe71e43150 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffe71e46030 R15: 00007ffe71e43640
----------------
Code disassembly (best guess):
0: e9 67 ff ff ff jmpq 0xffffff6c
5: 90 nop
6: 55 push %rbp
7: 48 83 ec 20 sub $0x20,%rsp
b: 48 8b 15 84 4b 8f 0e mov 0xe8f4b84(%rip),%rdx # 0xe8f4b96
12: 48 8b 05 75 4b 8f 0e mov 0xe8f4b75(%rip),%rax # 0xe8f4b8e
19: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
20: 00
21: 48 c7 44 24 08 00 00 movq $0x0,0x8(%rsp)
28: 00 00
* 2a: 48 c7 44 24 10 00 00 movq $0x0,0x10(%rsp) <-- trapping instruction
31: 00 00
33: 48 c7 44 24 18 00 00 movq $0x0,0x18(%rsp)
3a: 00 00
3c: 48 39 c2 cmp %rax,%rdx
3f: 77 .byte 0x77