INFO: task syz-executor.0:7958 blocked for more than 151 seconds.
Not tainted 6.3.0-rc6-syzkaller-00183-ga7a55e27ad72 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26488 pid:7958 ppid:5108 flags:0x00024000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0xc91/0x5770 kernel/sched/core.c:6625
schedule+0xde/0x1a0 kernel/sched/core.c:6701
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
io_wq_exit_workers io_uring/io-wq.c:1265 [inline]
io_wq_put_and_exit+0x273/0xec0 io_uring/io-wq.c:1300
io_uring_clean_tctx+0x10e/0x190 io_uring/tctx.c:193
io_uring_cancel_generic+0x566/0x690 io_uring/io_uring.c:3260
io_uring_files_cancel include/linux/io_uring.h:56 [inline]
do_exit+0x54f/0x2960 kernel/exit.c:824
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
get_signal+0x2315/0x25b0 kernel/signal.c:2859
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: 0033:0x7f60a468c169
RSP: 002b:00007f60a31dd168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f60a47ac120 RCX: 00007f60a468c169
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000025
RBP: 00007f60a46e7ca1 R08: 0000000000000000 R09: 2000000000000a32
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc367921ef R14: 00007f60a31dd300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c794a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c794770 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8c7955c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
2 locks held by getty/4754:
#0: ffff88802a678098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by kworker/u4:10/17560:
2 locks held by kworker/u4:16/24048:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361
#1: ffffc90003b07da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365
1 lock held by syz-executor.4/11560:
#0: ffff88803cf020e0 (&type->s_umount_key#59/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller-00183-ga7a55e27ad72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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+0x2e8/0x3a0 kernel/kthread.c:376
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: 24048 Comm: kworker/u4:16 Not tainted 6.3.0-rc6-syzkaller-00183-ga7a55e27ad72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:__lock_acquire+0xbb8/0x5d40 kernel/locking/lockdep.c:5053
Code: 74 0e 3c 03 7f 0a 48 8b 7c 24 38 e8 52 b2 6f 00 41 0f b7 5c 24 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 <48> 8d 3c c5 80 2b 4d 91 e8 8b b8 6f 00 48 0f a3 1d 43 e0 e8 0f 0f
RSP: 0018:ffffc90003b079b0 EFLAGS: 00000016
RAX: 000000000000001b RBX: 00000000000006c7 RCX: ffffffff8164565a
RDX: 1ffff110101918a5 RSI: 0000000000000008 RDI: ffffffff91524460
RBP: ffff888080c8c52a R08: 0000000000000000 R09: ffffffff914d2c5f
R10: fffffbfff229a58b R11: 0000000000000000 R12: ffff888080c8c508
R13: ffff888080c8ba80 R14: 0000000000000000 R15: 740f18be4ec77703
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c18186058 CR3: 000000002b9eb000 CR4: 0000000000350ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5669 [inline]
lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:355 [inline]
batadv_nc_purge_paths+0xdf/0x3c0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x8fa/0xfe0 net/batman-adv/network-coding.c:720
process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308