INFO: task syz-executor.5:10977 blocked for more than 143 seconds.
Not tainted 6.4.0-rc6-next-20230614-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:26984 pid:10977 ppid:5069 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x1d15/0x5790 kernel/sched/core.c:6709
schedule+0xde/0x1a0 kernel/sched/core.c:6785
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6844
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
__pipe_lock fs/pipe.c:103 [inline]
pipe_release+0x4d/0x310 fs/pipe.c:721
__fput+0x288/0xaa0 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efd7f03dffb
RSP: 002b:00007ffeaa551180 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007efd7f03dffb
RDX: 0000001b2f920000 RSI: 000000000000d6ac RDI: 0000000000000004
RBP: 00007efd7f1ad980 R08: 0000000000000000 R09: 0000000088d49289
R10: 00007ffeaa595090 R11: 0000000000000293 R12: 0000000000339248
R13: 00007ffeaa551280 R14: 00007ffeaa5512a0 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c9a1a30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xe60 kernel/rcu/tasks.h:568
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c9a16f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xe60 kernel/rcu/tasks.h:568
1 lock held by khungtaskd/28:
#0: ffffffff8c9a2640 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6615
1 lock held by kworker/u4:3/46:
#0: ffff8880b993c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558
2 locks held by getty/4778:
#0: ffff88802c1f2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf02/0x13f0 drivers/tty/n_tty.c:2176
4 locks held by kworker/u4:2/4529:
1 lock held by syz-executor.5/10977:
#0: ffff888028a2c468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888028a2c468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.5/10981:
1 lock held by syz-executor.5/11116:
#0: ffff88802bd66c68 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff88802bd66c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.5/11117:
1 lock held by syz-executor.5/11187:
#0: ffff888027c0c468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888027c0c468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.5/11188:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc6-next-20230614-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:154 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5026 Comm: syz-fuzzer Not tainted 6.4.0-rc6-next-20230614-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:__this_cpu_preempt_check+0xd/0x20 lib/smp_processor_id.c:66
Code: fa 0f 1f 44 00 00 48 c7 c6 a0 81 c7 8a 48 c7 c7 e0 81 c7 8a e9 74 fe ff ff 0f 1f 40 00 f3 0f 1e fa 55 48 89 fd 0f 1f 44 00 00 <48> 89 ee 5d 48 c7 c7 20 82 c7 8a e9 53 fe ff ff 0f 1f 00 41 57 41
RSP: 0018:ffffc90003a9f670 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8a6c7280
RBP: ffffffff8a6c7280 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880270c3b80
R13: 00000000ffffffff R14: 00000000ffffffff R15: 00000000000004a0
FS: 000000c0000fa890(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00b921000 CR3: 0000000076570000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_is_held_type+0x67/0x140 kernel/locking/lockdep.c:5831
lock_is_held include/linux/lockdep.h:288 [inline]
__might_resched+0x414/0x580 kernel/sched/core.c:10150
__might_fault+0x79/0x190 mm/memory.c:5710
_copy_to_iter+0x2e3/0x1110 lib/iov_iter.c:315
copy_to_iter include/linux/uio.h:194 [inline]
simple_copy_to_iter+0x50/0x70 net/core/datagram.c:513
__skb_datagram_iter+0x4b8/0x790 net/core/datagram.c:442
skb_copy_datagram_iter+0x44/0x50 net/core/datagram.c:527
skb_copy_datagram_msg include/linux/skbuff.h:3942 [inline]
tcp_recvmsg_locked+0xfaf/0x22e0 net/ipv4/tcp.c:2493
tcp_recvmsg+0x117/0x620 net/ipv4/tcp.c:2571
inet_recvmsg+0x114/0x640 net/ipv4/af_inet.c:879
sock_recvmsg_nosec net/socket.c:1020 [inline]
sock_recvmsg+0xe2/0x160 net/socket.c:1041
sock_read_iter+0x2c3/0x3c0 net/socket.c:1107
call_read_iter include/linux/fs.h:1859 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x775/0x8a0 fs/read_write.c:470
ksys_read+0x1e3/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x403ace
Code: 48 89 6c 24 38 48 8d 6c 24 38 e8 0d 00 00 00 48 8b 6c 24 38 48 83 c4 40 c3 cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c000bcf7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000403ace
RDX: 0000000000001000 RSI: 000000c0004cc000 RDI: 0000000000000003
RBP: 000000c000bcf828 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000c000bcf968
R13: 0000000000000000 R14: 000000c0000ac820 R15: 0000000000000002