INFO: task udevd:6378 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:27176 pid: 6378 ppid: 2969 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__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/0xc70 block/bdev.c:817
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:860
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_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
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: 0033:0x7f978aad6697
RSP: 002b:00007ffea97425b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000559247d37360 RCX: 00007f978aad6697
RDX: 00000000000a0800 RSI: 0000559247d0f590 RDI: 00000000ffffff9c
RBP: 0000559247d0f590 R08: 0000000000000001 R09: 00007ffea97bf080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000559247d17a90 R14: 0000000000000001 R15: 0000559247d0e910
INFO: task syz-executor.2:8879 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28112 pid: 8879 ppid: 3631 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_start_device_ioctl drivers/block/nbd.c:1410 [inline]
__nbd_ioctl drivers/block/nbd.c:1471 [inline]
nbd_ioctl+0x6e2/0xb10 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: 0033:0x7f4c439b3e99
RSP: 002b:00007f4c42329168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4c43ac6f60 RCX: 00007f4c439b3e99
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f4c43a0e031 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0703798f R14: 00007f4c42329300 R15: 0000000000022000
INFO: task syz-executor.2:8892 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26384 pid: 8892 ppid: 3631 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_schedule+0xee/0x170 kernel/sched/core.c:8371
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1371
folio_wait_bit mm/filemap.c:1431 [inline]
folio_wait_locked include/linux/pagemap.h:851 [inline]
folio_wait_locked include/linux/pagemap.h:848 [inline]
wait_on_page_locked include/linux/pagemap.h:863 [inline]
wait_on_page_read mm/filemap.c:3428 [inline]
do_read_cache_page+0x986/0x11a0 mm/filemap.c:3471
read_mapping_page include/linux/pagemap.h:651 [inline]
read_part_sector+0xf6/0x5b0 block/partitions/core.c:728
adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360
check_partition block/partitions/core.c:149 [inline]
blk_add_partitions block/partitions/core.c:613 [inline]
bdev_disk_changed+0x759/0x1100 block/partitions/core.c:699
blkdev_get_whole+0x206/0x2d0 block/bdev.c:684
blkdev_get_by_dev.part.0+0x5c6/0xc70 block/bdev.c:826
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:860
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_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
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: 0033:0x7f4c43966db4
RSP: 002b:00007f4c422e6ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f4c43966db4
RDX: 0000000000000000 RSI: 00007f4c422e6d40 RDI: 00000000ffffff9c
RBP: 00007f4c422e6d40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffc0703798f R14: 00007f4c422e7300 R15: 0000000000022000
INFO: task syz-executor.2:8894 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29592 pid: 8894 ppid: 3631 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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: 0033:0x7f4c439b3e99
RSP: 002b:00007f4c422a5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4c43ac72a0 RCX: 00007f4c439b3e99
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f4c43a0e031 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0703798f R14: 00007f4c422a5300 R15: 0000000000022000
INFO: task syz-executor.2:8895 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29592 pid: 8895 ppid: 3631 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__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: 0033:0x7f4c439b3e99
RSP: 002b:00007f4c42284168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4c43ac7370 RCX: 00007f4c439b3e99
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f4c43a0e031 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0703798f R14: 00007f4c42284300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83e60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by kworker/1:2/2504:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x173/0x490 kernel/sched/psi.c:871
#2: ffff8880b9d28070 (krc.lock){..-.}-{2:2}, at: kfree_rcu_work+0x32d/0xa10 kernel/rcu/tree.c:3286
2 locks held by getty/3283:
#0: ffff88807f512098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by udevd/6378:
#0: ffff88801ad33118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xc70 block/bdev.c:817
1 lock held by syz-executor.2/8879:
#0: ffff88801ac57198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1410 [inline]
#0: ffff88801ac57198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1471 [inline]
#0: ffff88801ac57198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x6e2/0xb10 drivers/block/nbd.c:1511
1 lock held by syz-executor.2/8892:
#0: ffff88801ad33118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xc70 block/bdev.c:817
1 lock held by syz-executor.2/8894:
#0: ffff88801ac57198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
1 lock held by syz-executor.2/8895:
#0: ffff88801ac57198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-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:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
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: 2951 Comm: syslogd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pvclock_clocksource_read+0x2e1/0x530 arch/x86/kernel/pvclock.c:111
Code: 00 00 48 c7 c7 20 e0 16 8f e8 fb c3 8a 00 48 89 d8 f0 4c 0f b1 25 ef 33 e3 0d 4c 39 e0 48 89 c3 75 d2 48 83 c4 58 4c 89 e0 5b <5d> 41 5c 41 5d 41 5e 41 5f c3 f7 da 83 fa 3f 89 d1 0f 8f 8a e4 cc
RSP: 0018:ffffc90001d0f618 EFLAGS: 00000092
RAX: 00000077c32eabfb RBX: ffff88801cc22420 RCX: 0000000000000008
RDX: 00000000f6369df8 RSI: 0000000000000000 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff8f16d018 R09: ffffffff8f16d00f
R10: ffffffff8f16d017 R11: 0000000000000001 R12: 00000077c32eabfb
R13: fffffbfff1e2da01 R14: ffffffff8f16d01d R15: ffffffff8f16d010
FS: 00007fee381e4800(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005638989af680 CR3: 000000007f905000 CR4: 0000000000350ef0
Call Trace:
kvm_clock_read arch/x86/kernel/kvmclock.c:79 [inline]
kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:91
vtime_delta kernel/sched/cputime.c:638 [inline]
get_vtime_delta+0x1a/0x420 kernel/sched/cputime.c:647
vtime_account_system+0x1a/0xb0 kernel/sched/cputime.c:667
__vtime_account_kernel kernel/sched/cputime.c:691 [inline]
vtime_task_switch_generic+0xfa/0x5a0 kernel/sched/cputime.c:773
vtime_task_switch include/linux/vtime.h:95 [inline]
finish_task_switch.isra.0+0x6cf/0xb80 kernel/sched/core.c:4846
context_switch kernel/sched/core.c:4975 [inline]
__schedule+0xaa2/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
__skb_wait_for_more_packets+0x353/0x5e0 net/core/datagram.c:122
__unix_dgram_recvmsg+0x202/0xb80 net/unix/af_unix.c:2316
unix_dgram_recvmsg+0xca/0xf0 net/unix/af_unix.c:2401
sock_recvmsg_nosec net/socket.c:944 [inline]
sock_recvmsg net/socket.c:962 [inline]
sock_recvmsg net/socket.c:958 [inline]
sock_read_iter+0x33c/0x470 net/socket.c:1035
call_read_iter include/linux/fs.h:2156 [inline]
new_sync_read+0x5ba/0x6e0 fs/read_write.c:400
vfs_read+0x35c/0x600 fs/read_write.c:481
ksys_read+0x1ee/0x250 fs/read_write.c:619
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: 0033:0x7fee383708fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffeb3ba0d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fee383708fe
RDX: 00000000000000ff RSI: 00005610f7855950 RDI: 0000000000000000
RBP: 00005610f7855910 R08: 00007fee38400040 R09: 00007fee384000c0
R10: 00007fee383fffc0 R11: 0000000000000246 R12: 00005610f7855983
R13: 00005610f7855950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 c7 c7 20 e0 16 8f mov $0xffffffff8f16e020,%rdi
9: e8 fb c3 8a 00 callq 0x8ac409
e: 48 89 d8 mov %rbx,%rax
11: f0 4c 0f b1 25 ef 33 lock cmpxchg %r12,0xde333ef(%rip) # 0xde33409
18: e3 0d
1a: 4c 39 e0 cmp %r12,%rax
1d: 48 89 c3 mov %rax,%rbx
20: 75 d2 jne 0xfffffff4
22: 48 83 c4 58 add $0x58,%rsp
26: 4c 89 e0 mov %r12,%rax
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: 41 5c pop %r12
2d: 41 5d pop %r13
2f: 41 5e pop %r14
31: 41 5f pop %r15
33: c3 retq
34: f7 da neg %edx
36: 83 fa 3f cmp $0x3f,%edx
39: 89 d1 mov %edx,%ecx
3b: 0f .byte 0xf
3c: 8f .byte 0x8f
3d: 8a e4 mov %ah,%ah
3f: cc int3