INFO: task syz-executor.3:6559 blocked for more than 143 seconds.
Not tainted 6.6.0-rc2-syzkaller-00244-g27bbf45eae9c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:25672 pid:6559 ppid:5076 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x196c/0x4af0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
io_schedule+0x8c/0x100 kernel/sched/core.c:9026
folio_wait_bit_common+0x881/0x12a0 mm/filemap.c:1301
clean_bdev_aliases+0x2f9/0x770 fs/buffer.c:1725
clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
__block_write_begin_int+0x771/0x1a40 fs/buffer.c:2115
iomap_write_begin+0xaf6/0x1f00 fs/iomap/buffered-io.c:772
iomap_write_iter fs/iomap/buffered-io.c:907 [inline]
iomap_file_buffered_write+0x587/0x1020 fs/iomap/buffered-io.c:968
blkdev_buffered_write block/fops.c:634 [inline]
blkdev_write_iter+0x3f5/0x5b0 block/fops.c:684
call_write_iter include/linux/fs.h:1956 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x782/0xaf0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f31a7c7cae9
RSP: 002b:00007f31a88fd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f31a7d9c050 RCX: 00007f31a7c7cae9
RDX: 000000000156a396 RSI: 0000000020002a40 RDI: 0000000000000003
RBP: 00007f31a7cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f31a7d9c050 R15: 00007ffc643c4f18
Showing all locks held in the system:
2 locks held by kworker/0:1/9:
#0: ffff8880b983c318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:999
2 locks held by kworker/u4:1/12:
1 lock held by khungtaskd/29:
#0:
ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:3/48:
2 locks held by kworker/u4:7/1047:
3 locks held by udevd/4484:
2 locks held by getty/4792:
#0: ffff88814a8370a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206
2 locks held by kworker/1:3/5037:
#0: ffff888012872938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#0: ffff888012872938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
#1: ffffc90003a47d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#1: ffffc90003a47d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
1 lock held by syz-executor.3/6690:
#0: ffff8880771ae0e0 (&type->s_umount_key#30){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880771ae0e0 (&type->s_umount_key#30){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880771ae0e0 (&type->s_umount_key#30){++++}-{3:3}, at: get_tree_bdev+0x36e/0x5b0 fs/super.c:1575
1 lock held by syz-executor.5/7249:
1 lock held by syz-executor.2/7248:
7 locks held by syz-executor.0/7251:
1 lock held by syz-executor.1/7253:
#0: ffff8880b983c318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-00244-g27bbf45eae9c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfa9/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4484 Comm: udevd Not tainted 6.6.0-rc2-syzkaller-00244-g27bbf45eae9c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:skb_end_pointer include/linux/skbuff.h:1609 [inline]
RIP: 0010:__skb_datagram_iter+0x15b/0x780 net/core/datagram.c:429
Code: 49 8d ac 24 d0 00 00 00 48 81 c3 cc 00 00 00 48 89 e8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 48 89 44 24 40 42 80 3c 20 00 <74> 08 48 89 ef e8 9b 31 37 f9 48 89 6c 24 48 4c 8b 7d 00 48 89 d8
RSP: 0018:ffffc900031778c8 EFLAGS: 00000246
RAX: 1ffff1100fccaa42 RBX: ffff88807e65520c RCX: ffff88807c858000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88807e655210 R08: ffffffff88b146dc R09: ffffffff88b15000
R10: dffffc0000000000 R11: fffffbfff1d34d16 R12: dffffc0000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007fb51b93bc80(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c02a278000 CR3: 00000000254c2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
skb_copy_datagram_iter+0xc1/0x220 net/core/datagram.c:527
skb_copy_datagram_msg include/linux/skbuff.h:3957 [inline]
__unix_dgram_recvmsg+0x7e7/0x1260 net/unix/af_unix.c:2401
sock_recvmsg_nosec net/socket.c:1027 [inline]
sock_recvmsg net/socket.c:1049 [inline]
____sys_recvmsg+0x2a4/0x580 net/socket.c:2760
___sys_recvmsg net/socket.c:2802 [inline]
__sys_recvmsg+0x2f0/0x3d0 net/socket.c:2832
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb51b52491e
Code: ff 89 ef 48 89 04 24 e8 4f 57 f9 ff 48 8b 04 24 48 83 c4 30 5d c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 21 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 70 48 8b 15 db c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffe1cabfd68 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb51b52491e
RDX: 0000000000000040 RSI: 00007ffe1cabfe30 RDI: 0000000000000009
RBP: 00007ffe1cabfe30 R08: 000000001bfff715 R09: 00007ffe1cbe70b0
R10: 00007ffe1cbe7080 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000200000001 R14: 0000000000000000 R15: 0000000000000000