INFO: task syz-executor.2:8981 blocked for more than 143 seconds.
Not tainted 6.9.0-rc4-syzkaller-00329-g48cf398f15fc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:23648 pid:8981 tgid:8981 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
bit_wait+0x15/0xe0 kernel/sched/wait_bit.c:199
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
wait_on_bit include/linux/wait_bit.h:71 [inline]
gfs2_glock_wait+0xe7/0x330 fs/gfs2/glock.c:1354
gfs2_glock_nq+0x946/0x1cd0 fs/gfs2/glock.c:1616
gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
__gfs2_lookup+0x111/0x290 fs/gfs2/inode.c:905
__lookup_slow+0x24f/0x460 fs/namei.c:1692
lookup_slow fs/namei.c:1709 [inline]
walk_component+0x350/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
ksys_umount fs/namespace.c:1916 [inline]
__do_sys_umount fs/namespace.c:1924 [inline]
__se_sys_umount fs/namespace.c:1922 [inline]
__x64_sys_umount+0x10e/0x1a0 fs/namespace.c:1922
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2dd4a7f1d7
RSP: 002b:00007ffeb5a08858 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f2dd4ac93b9 RCX: 00007f2dd4a7f1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb5a08910
RBP: 00007ffeb5a08910 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeb5a09a00
R13: 00007f2dd4ac93b9 R14: 0000555560bbc430 R15: 000000000000000a
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:4/60:
#0: ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900015b7d80 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
2 locks held by getty/4826:
#0: ffff88802eaa90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.2/8981:
#0: ffff888058f90150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff888058f90150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff888058f90150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc4-syzkaller-00329-g48cf398f15fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2448 Comm: kworker/u8:7 Not tainted 6.9.0-rc4-syzkaller-00329-g48cf398f15fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:write_comp_data+0x34/0x90 kernel/kcov.c:236
Code: 48 8b 15 ff 1b 76 7e 65 8b 05 00 1c 76 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 14 16 00 00 85 c0 74 4f 8b 82 f0 15 00 00 <83> f8 03 75 44 48 8b 82 f8 15 00 00 8b 92 f4 15 00 00 48 8b 38 48
RSP: 0018:ffffc9000a0476a8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000a047730 RCX: ffffffff813d190d
RDX: ffff8880298c9e00 RSI: 000000000000de83 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000000de83
R10: 00000000000a0000 R11: 0000000000000002 R12: ffffffff81de83c8
R13: 000000000000de83 R14: 00000000000a0000 R15: ffffc9000a047765
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00013e000 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:211 [inline]
unwind_next_frame+0x23d/0x23a0 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x129/0x390 mm/slub.c:4390
batadv_mcast_mla_list_free net/batman-adv/multicast.c:670 [inline]
__batadv_mcast_mla_update net/batman-adv/multicast.c:927 [inline]
batadv_mcast_mla_update+0x151f/0x3200 net/batman-adv/multicast.c:949
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244