INFO: task syz-executor.2:30682 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00286-g168174d78157 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26832 pid:30682 tgid:30682 ppid:5108 flags:0x00004006
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
coredump_task_exit kernel/exit.c:439 [inline]
do_exit+0x3e7/0x2ad0 kernel/exit.c:825
do_group_exit+0xd4/0x2a0 kernel/exit.c:1020
get_signal+0x23b5/0x2790 kernel/signal.c:2893
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212
do_syscall_64+0xe0/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3aede7cda9
RSP: 002b:00007ffe3cd134c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 00000000001d7b17 RCX: 00007f3aede7cda9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3aedfac05c
RBP: 0000000000000032 R08: 00007f3aedfac05c R09: 00007f3aedfac05c
R10: 00007ffe3cd13600 R11: 0000000000000246 R12: 00007f3aedfac05c
R13: 00000000001d7b49 R14: 00007ffe3cd13620 R15: 00007ffe3cd13600
INFO: task syz-executor.2:30684 blocked for more than 144 seconds.
Not tainted 6.8.0-rc1-syzkaller-00286-g168174d78157 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28448 pid:30684 tgid:30682 ppid:5108 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_timeout+0x257/0x290 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x30 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:414 [inline]
do_coredump+0x908/0x3f70 fs/coredump.c:571
get_signal+0x242f/0x2790 kernel/signal.c:2879
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212
do_syscall_64+0xe0/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3aede7cda9
RSP: 002b:00007f3aeeb570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffe5 RBX: 00007f3aedfabf80 RCX: 00007f3aede7cda9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 00007f3aedec947a R08: 0000000000000000 R09: 0000000000000000
R10: 000004010040bffd R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3aedfabf80 R15: 00007ffe3cd133e8
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b1/0x800 kernel/rcu/tree_exp.h:995
1 lock held by khungtaskd/29:
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4810:
#0: ffff8880298360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:4/5150:
#0: ffff888013088d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc9000455fd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
#2: ffff88806eb62240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26e0 drivers/net/netdevsim/fib.c:1489
2 locks held by kworker/0:10/26786:
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc90003437d80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
3 locks held by syz-executor.4/4910:
1 lock held by syz-executor.2/5272:
#0: ffff8880b983ccd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
2 locks held by syz-executor.3/5299:
#0: ffff88807eb7ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#0: ffff88807eb7ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x260 net/socket.c:658
#1: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ff/0x800 kernel/rcu/tree_exp.h:995
4 locks held by syz-executor.5/5311:
#0:
ffffffff8ed5e2b0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1207
#2: ffff8880947e3100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff8880947e3100 (&dev->mutex){....}-{3:3}, at: nfc_dev_up+0x2f/0x3d0 net/nfc/core.c:95
#3: ffff8880947e2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_open_device net/nfc/nci/core.c:478 [inline]
#3: ffff8880947e2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_dev_up+0x9b/0x660 net/nfc/nci/core.c:632
2 locks held by syz-executor.2/5321:
#0: ffffffff8ed5e2b0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1207
2 locks held by syz-executor.2/5329:
#0: ffffffff8ed5e2b0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline]
#1: ffffffff8ed5e368 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1207
no locks held by syz-executor.1/5343.
2 locks held by syz-executor.0/5345:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00286-g168174d78157 #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: 29995 Comm: kworker/u4:16 Not tainted 6.8.0-rc1-syzkaller-00286-g168174d78157 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x5a/0x3b30 kernel/locking/lockdep.c:4993
Code: 44 89 44 24 08 44 8b b4 24 48 01 00 00 48 c7 84 24 98 00 00 00 72 51 98 8c 48 c7 84 24 a0 00 00 00 c0 35 68 81 48 89 44 24 18 <48> 8d 84 24 90 00 00 00 48 c1 e8 03 48 89 44 24 30 48 89 c6 48 b8
RSP: 0018:ffffc9001454f978 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d1acba0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8f3af797 R11: 0000000000000002 R12: 0000000000000000
R13: ffffffff8d1acba0 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 00000000a31de000 CR4: 0000000000350ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
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