INFO: task syz-executor.1:22265 blocked for more than 143 seconds.
Not tainted 6.8.0-rc5-syzkaller-00278-g603c04e27c3e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29872 pid:22265 tgid:22263 ppid:21914 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5bd/0x9d0 kernel/locking/mutex.c:752
blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
blkdev_common_ioctl+0x15ae/0x1ce0 block/ioctl.c:563
blkdev_ioctl+0x247/0x770 block/ioctl.c:628
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x193/0x220 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f551747dda9
RSP: 002b:00007f551829b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f55175ac050 RCX: 00007f551747dda9
RDX: 0000000020000040 RSI: 0000000000001276 RDI: 0000000000000003
RBP: 00007f55174ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f55175ac050 R15: 00007ffd29c93278
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7ad2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7ad2e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7ad2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:8/2452:
2 locks held by getty/4819:
#0: ffff88802abd30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.1/22264:
1 lock held by syz-executor.1/22265:
#0: ffff88801fee32b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
1 lock held by syz-executor.1/22856:
#0: ffff88801fee32b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
1 lock held by syz-executor.1/23236:
#0: ffff88801fee32b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
1 lock held by syz-executor.1/23716:
#0: ffff88801fee32b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
1 lock held by syz-executor.1/23720:
#0: ffff88801fee32b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xc9/0x290 kernel/trace/blktrace.c:736
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00278-g603c04e27c3e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5955 Comm: kworker/u4:7 Not tainted 6.8.0-rc5-syzkaller-00278-g603c04e27c3e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x82/0xc60 kernel/locking/lockdep.c:4639
Code: 00 f2 f2 f2 c7 40 08 00 f2 f2 f2 c7 40 10 00 00 00 f3 c7 40 14 f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 08 01 00 00 <31> c0 41 83 fe 09 0f 87 e3 00 00 00 41 83 fe 08 49 89 fc 48 89 f3
RSP: 0018:ffffc90007357980 EFLAGS: 00000086
RAX: a07f64078d75fc00 RBX: 0000000000000001 RCX: 1ffffffff27b4517
RDX: dffffc0000000000 RSI: ffff88802c980ae8 RDI: ffff88802c980000
RBP: ffffc90007357ac0 R08: 0000000000000000 R09: fffffbfff27a9813
R10: ffffffff93d4c09f R11: 0000000000000002 R12: ffff88802c980000
R13: dffffc0000000000 R14: 0000000000000002 R15: 1ffff92000e6af36
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63d4f7c038 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline]
lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4359 [inline]
lockdep_hardirqs_on_prepare+0x139/0x420 kernel/locking/lockdep.c:4311
trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61
__local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:386
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x1d1/0x3c0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x9b1/0x10f0 net/batman-adv/network-coding.c:722
process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242