INFO: task syz-executor.2:13406 blocked for more than 143 seconds.
Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26456 pid:13406 tgid:13400 ppid:5101 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1198/0x1b90 fs/fuse/dev.c:513
fuse_lookup_name+0x332/0x830 fs/fuse/dir.c:386
fuse_lookup+0x182/0x600 fs/fuse/dir.c:425
fuse_atomic_open+0x19e/0x8a0 fs/fuse/dir.c:731
atomic_open fs/namei.c:3363 [inline]
lookup_open fs/namei.c:3471 [inline]
open_last_lookups fs/namei.c:3569 [inline]
path_openat+0xe79/0x3240 fs/namei.c:3799
do_filp_open+0x234/0x490 fs/namei.c:3829
do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_open fs/open.c:1427 [inline]
__se_sys_open fs/open.c:1423 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1423
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fee0467dda9
RSP: 002b:00007fee0537b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fee047abf80 RCX: 00007fee0467dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020004200
RBP: 00007fee046ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fee047abf80 R15: 00007ffe5a317cd8
INFO: task syz-executor.2:13408 blocked for more than 143 seconds.
Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:23792 pid:13408 tgid:13400 ppid:5101 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1ae/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:839 [inline]
filename_create+0x260/0x540 fs/namei.c:3895
do_mkdirat+0xbd/0x3a0 fs/namei.c:4141
__do_sys_mkdirat fs/namei.c:4164 [inline]
__se_sys_mkdirat fs/namei.c:4162 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4162
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fee0467c8a7
RSP: 002b:00007fee05359ef8 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fee05359f80 RCX: 00007fee0467c8a7
RDX: 00000000000001ff RSI: 0000000020001540 RDI: 00000000ffffff9c
RBP: 0000000020001500 R08: 0000000000000000 R09: 00000000000014e0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020001540
R13: 00007fee05359f40 R14: 00000000000014e6 R15: 0000000020004380
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4822:
#0: ffff88802a5cc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.2/13406:
#0: ffff888035ec8810 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#0: ffff888035ec8810 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: open_last_lookups fs/namei.c:3568 [inline]
#0: ffff888035ec8810 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: path_openat+0x7c3/0x3240 fs/namei.c:3799
#1: ffff888035ec8c88 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:544
2 locks held by syz-executor.2/13408:
#0: ffff888037138420 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888035ec8810 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
#1: ffff888035ec8810 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3895
4 locks held by kworker/0:2/13945:
#0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
#2: ffffffff946846f8 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
#2: ffffffff946846f8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019
#3: ffff8880b9429898 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x6a1/0xfd0 kernel/time/timer.c:1112
2 locks held by syz-executor.2/13975:
#0: ffff8880384f1c50 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#0: ffff8880384f1c50 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: open_last_lookups fs/namei.c:3568 [inline]
#0: ffff8880384f1c50 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: path_openat+0x7c3/0x3240 fs/namei.c:3799
#1: ffff8880384f20c8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:544
1 lock held by syz-executor.0/15800:
#0: ffff88802d5fe420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write_file+0x61/0x200 fs/namespace.c:453
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 49 Comm: kworker/u4:3 Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:116 [inline]
RIP: 0010:lock_release+0xce/0x9d0 kernel/locking/lockdep.c:5767
Code: 84 8f be 08 00 00 00 e8 50 02 81 00 48 0f a3 1d 50 00 13 0e 73 0d e8 31 95 09 00 84 c0 0f 84 d3 05 00 00 48 c7 c0 fc 6f 84 8f <48> c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e1 05 00 00 83 3d 36 33 13
RSP: 0018:ffffc90000b9f9e0 EFLAGS: 00000202
RAX: ffffffff8f846ffc RBX: 0000000000000000 RCX: ffffffff81713c90
RDX: 0000000000000000 RSI: ffffffff8bfd9a00 RDI: ffffffff8bfd99c0
RBP: ffffc90000b9fb18 R08: ffffffff8f843cef R09: 1ffffffff1f0879d
R10: dffffc0000000000 R11: fffffbfff1f0879e R12: 1ffff92000173f48
R13: ffffffff8b2ba115 R14: ffff888017b95bf0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ffd16f5b0 CR3: 000000001eda0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:308 [inline]
rcu_read_unlock include/linux/rcupdate.h:783 [inline]
batadv_nc_process_nc_paths+0x2f5/0x3a0 net/batman-adv/network-coding.c:699
batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243