INFO: task syz-executor.4:5987 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28064 pid:5987 tgid:5984 ppid:5791 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:752
blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
sg_ioctl_common drivers/scsi/sg.c:1126 [inline]
sg_ioctl+0x9ac/0x2760 drivers/scsi/sg.c:1160
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+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f8bf587cda9
RSP: 002b:00007f8bf66530c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8bf59ac050 RCX: 00007f8bf587cda9
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003
RBP: 00007f8bf58c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8bf59ac050 R15: 00007ffeb93ee9c8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d1a9120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d1a9120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d1a9120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:3/50:
2 locks held by getty/4805:
#0: ffff8880294850a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015e02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.4/5986:
1 lock held by syz-executor.4/5987:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
1 lock held by syz-executor.0/6073:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_startstop+0x23/0x40 kernel/trace/blktrace.c:709
1 lock held by syz-executor.3/6137:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_startstop+0x23/0x40 kernel/trace/blktrace.c:709
1 lock held by syz-executor.4/6197:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
1 lock held by syz-executor.0/6378:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_startstop+0x23/0x40 kernel/trace/blktrace.c:709
1 lock held by syz-executor.4/6503:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
1 lock held by syz-executor.4/6505:
#0: ffff88801e70b2b0 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12386 Comm: kworker/u4:12 Not tainted 6.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:skb_reset_tail_pointer include/linux/skbuff.h:2547 [inline]
RIP: 0010:__finalize_skb_around net/core/skbuff.c:357 [inline]
RIP: 0010:__build_skb_around+0x120/0x3a0 net/core/skbuff.c:422
Code: 85 90 02 00 00 48 8d bb c8 00 00 00 4c 89 a3 d8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 <74> 08 3c 03 0f 8e 1b 02 00 00 48 8d bb cc 00 00 00 48 b8 00 00 00
RSP: 0018:ffffc90014237a08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807a7b3780 RCX: ffffffff887316dc
RDX: 1ffff1100f4f6709 RSI: 0000000000000004 RDI: ffff88807a7b3848
RBP: ffff88807a7b3864 R08: 0000000000000001 R09: ffffed100f4f670c
R10: ffff88807a7b3867 R11: 0000000000000003 R12: ffff88807a405800
R13: 00000000000002c0 R14: 0000000000020820 R15: ffff888017698640
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00479c8f3 CR3: 000000000cf78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__alloc_skb+0x167/0x330 net/core/skbuff.c:666
__netdev_alloc_skb+0x72/0x3f0 net/core/skbuff.c:715
__netdev_alloc_skb_ip_align include/linux/skbuff.h:3255 [inline]
netdev_alloc_skb_ip_align include/linux/skbuff.h:3265 [inline]
batadv_iv_ogm_aggregate_new+0x104/0x4a0 net/batman-adv/bat_iv_ogm.c:558
batadv_iv_ogm_queue_add net/batman-adv/bat_iv_ogm.c:670 [inline]
batadv_iv_ogm_schedule_buff+0x99b/0x14f0 net/batman-adv/bat_iv_ogm.c:833
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8c0 net/batman-adv/bat_iv_ogm.c:1712
process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242