INFO: task syz-executor.1:8242 blocked for more than 143 seconds.
Not tainted 6.4.0-rc5-syzkaller-01111-g26a4dd839eeb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27016 pid:8242 ppid:8229 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
__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+0x27c/0xa90 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: 0033:0x7f6b2203e01b
RSP: 002b:00007ffd61f56d80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 00007f6b2203e01b
RDX: 0000001b2e020000 RSI: 00007f6b20a03ff8 RDI: 0000000000000008
RBP: 00007f6b221ad980 R08: 0000000000000000 R09: 0000000001e469e0
R10: 00007ffd61f64090 R11: 0000000000000293 R12: 000000000010c3e3
R13: 00007ffd61f56e80 R14: 00007f6b221ac2c0 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c7984b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7981b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8c7990c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559
2 locks held by getty/4760:
#0: ffff88802c612098 (&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+0xef4/0x13e0 drivers/tty/n_tty.c:2176
3 locks held by kworker/u4:2/16514:
2 locks held by syz-executor.5/4790:
2 locks held by syz-executor.1/8157:
1 lock held by syz-executor.1/8242:
#0: ffff8880588b8068 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff8880588b8068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.1/8244:
2 locks held by syz-executor.1/8308:
2 locks held by syz-executor.1/8366:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-01111-g26a4dd839eeb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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:148 [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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4790 Comm: syz-executor.5 Not tainted 6.4.0-rc5-syzkaller-01111-g26a4dd839eeb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__ip6_append_data.isra.0+0xf31/0x4420 net/ipv6/ip6_output.c:1776
Code: eb e8 23 8d b9 f8 31 ff 89 de e8 3a 89 b9 f8 85 db 0f 8e 94 11 00 00 e8 0d 8d b9 f8 48 8b b4 24 a0 01 00 00 4c 63 e3 4c 89 e7 ba 88 b9 f8 4c 3b a4 24 a0 01 00 00 76 0c e8 eb 8c b9 f8 8b 9c
RSP: 0000:ffffc900149374e0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 000000000000ffd8 RCX: ffffc90017dce000
RDX: 0000000000040000 RSI: 0000000000000065 RDI: 000000000000ffd8
RBP: 0000000000000028 R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000ffd8 R11: ffffffff8a114fa9 R12: 000000000000ffd8
R13: dffffc0000000000 R14: ffff88802a0ab8c0 R15: 000000000000ffd8
FS: 00007f379dbc3700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da28000 CR3: 000000001e20e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6_append_data+0x1f4/0x550 net/ipv6/ip6_output.c:1885
rawv6_sendmsg+0x15bb/0x3d70 net/ipv6/raw.c:919
inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:830
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
splice_to_socket+0x954/0xe30 fs/splice.c:917
do_splice_from fs/splice.c:969 [inline]
do_splice+0xb8c/0x1e50 fs/splice.c:1309
__do_splice+0x14e/0x270 fs/splice.c:1387
__do_sys_splice fs/splice.c:1598 [inline]
__se_sys_splice fs/splice.c:1580 [inline]
__x64_sys_splice+0x19c/0x250 fs/splice.c:1580
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: 0033:0x7f379ce8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f379dbc3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007f379cfac050 RCX: 00007f379ce8c169
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007f379cee7ca1 R08: 000000000004ff9c R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd41530e6f R14: 00007f379dbc3300 R15: 0000000000022000