INFO: task syz-executor.3:6019 blocked for more than 143 seconds.
Not tainted 6.3.0-rc2-next-20230316-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27888 pid:6019 ppid:5140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5305 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6623
schedule+0xde/0x1a0 kernel/sched/core.c:6699
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6758
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
eventpoll_release include/linux/eventpoll.h:53 [inline]
__fput+0x7da/0xa90 fs/file_table.c:312
task_work_run+0x16f/0x270 kernel/task_work.c:179
get_signal+0x1c7/0x25b0 kernel/signal.c:2635
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/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: 0033:0x7f1978e8c0f9
RSP: 002b:00007f1979c65168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007f1978fabf80 RCX: 00007f1978e8c0f9
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007f1978ee7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc76992edf R14: 00007f1979c65300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c795830 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c795530 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8c796400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
2 locks held by getty/4758:
#0: ffff88814a102098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by kworker/1:11/32327:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361
#1: ffffc90004927da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365
1 lock held by syz-executor.3/6019:
#0: ffff888021b07468 (&ep->mtx){+.+.}-{3:3}, at: eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
1 lock held by syz-executor.3/6027:
2 locks held by syz-executor.3/6999:
1 lock held by syz-executor.0/7028:
1 lock held by syz-executor.4/7043:
#0: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992
2 locks held by dhcpcd/7045:
#0: ffff88804dcfc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff88804dcfc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3193
#1: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992
2 locks held by syz-executor.3/7046:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-next-20230316-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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+0x33e/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: 7037 Comm: syz-executor.2 Not tainted 6.3.0-rc2-next-20230316-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:__lock_acquire+0xeee/0x5df0 kernel/locking/lockdep.c:5044
Code: 0d 85 c0 0f 85 81 f8 ff ff 48 c7 c6 a0 69 4c 8a 48 c7 c7 60 5d 4c 8a e8 10 d0 e6 ff 0f 0b 31 c0 e9 7b f7 ff ff 48 63 5c 24 10 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 bc 4e 91 e8 09
RSP: 0018:ffffc9000b5bf708 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 0000000000000021 RCX: 1ffffffff229db2e
RDX: 0000000000000004 RSI: 0000000000000200 RDI: ffffffff914ed970
RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff914ebc47
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880802a44e0
R13: ffff8880802a3a80 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007fdbc47fe700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201bc030 CR3: 000000007d4b1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691
rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
rcu_read_lock include/linux/rcupdate.h:773 [inline]
__lock_task_sighand+0x47/0x340 kernel/signal.c:1389
lock_task_sighand include/linux/sched/signal.h:745 [inline]
do_send_sig_info kernel/signal.c:1295 [inline]
group_send_sig_info+0x297/0x310 kernel/signal.c:1444
bpf_send_signal_common+0x2f3/0x3a0 kernel/trace/bpf_trace.c:874
____bpf_send_signal kernel/trace/bpf_trace.c:879 [inline]
bpf_send_signal+0x19/0x20 kernel/trace/bpf_trace.c:877
bpf_prog_7becd524ae48fd9c+0x22/0x24
bpf_dispatcher_nop_func include/linux/bpf.h:1139 [inline]
__bpf_prog_run include/linux/filter.h:601 [inline]
bpf_prog_run include/linux/filter.h:608 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2259 [inline]
bpf_trace_run2+0x150/0x410 kernel/trace/bpf_trace.c:2298
trace_kfree include/trace/events/kmem.h:94 [inline]
kfree+0xf2/0x150 mm/slab_common.c:1002
___sys_recvmsg+0xff/0x180 net/socket.c:2763
do_recvmmsg+0x25e/0x6e0 net/socket.c:2856
__sys_recvmmsg net/socket.c:2935 [inline]
__do_sys_recvmmsg net/socket.c:2958 [inline]
__se_sys_recvmmsg net/socket.c:2951 [inline]
__x64_sys_recvmmsg+0x20f/0x260 net/socket.c:2951
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: 0033:0x7fdbc5c8c0f9
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:00007fdbc47fe168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fdbc5dac050 RCX: 00007fdbc5c8c0f9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fdbc5ce7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffde0eba04f R14: 00007fdbc47fe300 R15: 0000000000022000