INFO: task syz-executor.0:7995 blocked for more than 140 seconds.
Not tainted 4.14.293-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D25640 7995 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
loop_reread_partitions drivers/block/loop.c:624 [inline]
loop_clr_fd+0x9ca/0xc20 drivers/block/loop.c:1078
lo_ioctl+0x895/0x1cd0 drivers/block/loop.c:1429
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
block_ioctl+0xd9/0x120 fs/block_dev.c:1893
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fb84ae871c7
RSP: 002b:00007ffcdd60a9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffcdd60aa40 RCX: 00007fb84ae871c7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 00007ffcdd60a850
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032
R13: 00000000001ea51a R14: 0000000000000005 R15: 00007ffcdd60aa80
INFO: task syz-executor.3:30740 blocked for more than 140 seconds.
Not tainted 4.14.293-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D30448 30740 7998 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
loop_control_ioctl+0x181/0x3f0 drivers/block/loop.c:2012
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fbca4b2b409
RSP: 002b:00007fbca347f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbca4c3e050 RCX: 00007fbca4b2b409
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007fbca4b86367 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4b0e5d4f R14: 00007fbca347f300 R15: 0000000000022000
INFO: task systemd-udevd:30746 blocked for more than 140 seconds.
Not tainted 4.14.293-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd D28912 30746 4628 0x00000304
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
lo_open+0x19/0xb0 drivers/block/loop.c:1639
__blkdev_get+0xa8c/0x1090 fs/block_dev.c:1537
blkdev_get+0x88/0x890 fs/block_dev.c:1611
blkdev_open+0x1cc/0x250 fs/block_dev.c:1772
do_dentry_open+0x44b/0xec0 fs/open.c:777
vfs_open+0x105/0x220 fs/open.c:888
do_last fs/namei.c:3428 [inline]
path_openat+0x628/0x2970 fs/namei.c:3571
do_filp_open+0x179/0x3c0 fs/namei.c:3605
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: 0033:0x7fe0a221f840
RSP: 002b:00007fffacc667d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055827fb645c0 RCX: 00007fe0a221f840
RDX: 000055827ea30fe3 RSI: 00000000000a0800 RDI: 000055827fb63f30
RBP: 00007fffacc66950 R08: 000055827ea30670 R09: 0000000000000010
R10: 000055827ea30d0c R11: 0000000000000246 R12: 00007fffacc668a0
R13: 000055827fb618b0 R14: 0000000000000003 R15: 000000000000000e
Showing all locks held in the system:
1 lock held by khungtaskd/1533:
#0: (tasklist_lock){.+.+}, at: [<ffffffff87024bb9>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
1 lock held by in:imklog/7689:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff818d77ab>] __fdget_pos+0x1fb/0x2b0 fs/file.c:819
2 locks held by syz-executor.0/7995:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<ffffffff838da087>] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1419
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff830c0e7b>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
2 locks held by syz-executor.3/30740:
#0: (loop_index_mutex){+.+.}, at: [<ffffffff838d7137>] loop_control_ioctl+0x67/0x3f0 drivers/block/loop.c:1998
#1: (&lo->lo_ctl_mutex){+.+.}, at: [<ffffffff838d7251>] loop_control_ioctl+0x181/0x3f0 drivers/block/loop.c:2012
2 locks held by systemd-udevd/30746:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff81942581>] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455
#1: (loop_index_mutex){+.+.}, at: [<ffffffff838d09c9>] lo_open+0x19/0xb0 drivers/block/loop.c:1639
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.293-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 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: 22547 Comm: kworker/u4:2 Not tainted 4.14.293-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: bat_events batadv_nc_worker
task: ffff88809ff5e380 task.stack: ffff88809d320000
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65
RSP: 0018:ffff88809d327c60 EFLAGS: 00000202
RAX: ffff88809ff5e380 RBX: ffff8880aaea9920 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88809ff5ec04
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000020011
R10: ffff88809ff5ec58 R11: ffff88809ff5e380 R12: dffffc0000000000
R13: ffff888096626a68 R14: ffff888096626000 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a6f1cd020 CR3: 00000000a1709000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:681 [inline]
batadv_nc_process_nc_paths.part.0+0x1fa/0x350 net/batman-adv/network-coding.c:709
batadv_nc_process_nc_paths net/batman-adv/network-coding.c:689 [inline]
batadv_nc_worker+0x8b8/0xc50 net/batman-adv/network-coding.c:737
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 e9 9f fe ff ff 4c 89 e7 e8 14 ba 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 <48> 85 c0 74 1a 65 8b 15 7b 37 ad 7e 81 e2 00 01 1f 00 75 0b 8b