INFO: task syz.6.219:7221 blocked for more than 143 seconds.
Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.219 state:D stack:27328 pid:7221 tgid:7217 ppid:6508 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
d_wait_lookup fs/dcache.c:2477 [inline]
d_alloc_parallel+0xc16/0x1600 fs/dcache.c:2559
__lookup_slow+0x117/0x3f0 fs/namei.c:1776
lookup_slow+0x53/0x70 fs/namei.c:1808
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
do_mount fs/namespace.c:3844 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6232b7fed9
RSP: 002b:00007f623399b058 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6232d46080 RCX: 00007f6232b7fed9
RDX: 0000000020000340 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007f6232bf3cc8 R08: 0000000020000040 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6232d46080 R15: 00007ffd86114868
INFO: task syz.6.219:7223 blocked for more than 143 seconds.
Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.219 state:D stack:27328 pid:7223 tgid:7217 ppid:6508 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
d_wait_lookup fs/dcache.c:2477 [inline]
d_alloc_parallel+0xc16/0x1600 fs/dcache.c:2559
__lookup_slow+0x117/0x3f0 fs/namei.c:1776
lookup_slow+0x53/0x70 fs/namei.c:1808
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
vfs_statx+0x103/0x490 fs/stat.c:344
vfs_fstatat fs/stat.c:366 [inline]
vfs_stat include/linux/fs.h:3404 [inline]
__do_sys_newstat fs/stat.c:503 [inline]
__se_sys_newstat fs/stat.c:499 [inline]
__x64_sys_newstat+0xf7/0x180 fs/stat.c:499
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6232b7fed9
RSP: 002b:00007f623397a058 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00007f6232d46160 RCX: 00007f6232b7fed9
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000020000280
RBP: 00007f6232bf3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6232d46160 R15: 00007ffd86114868
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e9374a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/5589:
#0: ffff8880310b30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:5/5881:
2 locks held by kworker/u8:35/7027:
1 lock held by syz.6.219/7218:
1 lock held by syz.6.219/7221:
#0: ffff88805a358180 (&type->i_mutex_dir_key#25){.+.+}-{4:4}
, at: inode_lock_shared include/linux/fs.h:840 [inline]
, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.6.219/7223:
#0: ffff88805a358180 (&type->i_mutex_dir_key#25){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:840 [inline]
#0: ffff88805a358180 (&type->i_mutex_dir_key#25){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.6.219/7225:
6 locks held by syz.1.562/9527:
2 locks held by dhcpcd-run-hook/9532:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3417 Comm: kworker/u8:7 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0xc54/0x2100 kernel/locking/lockdep.c:5196
Code: e1 04 00 00 4c 89 ef 48 89 ee ba 08 00 00 00 e8 92 65 00 00 45 31 f6 85 c0 0f 84 da 07 00 00 48 c7 c0 80 99 3b 9a 48 c1 e8 03 <48> bf 00 00 00 00 00 fc ff df 0f b6 04 38 84 c0 0f 85 24 0d 00 00
RSP: 0018:ffffc9000d1bf8f0 EFLAGS: 00000806
RAX: 1ffffffff3477330 RBX: ffffffff93c85998 RCX: ffffffff817b0afa
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942b2840
RBP: ffff888031648b38 R08: ffffffff942b2847 R09: 1ffffffff2856508
R10: dffffc0000000000 R11: fffffbfff2856509 R12: ffff888031648acc
R13: ffff888031648000 R14: 0000000000000000 R15: ffff888031648b58
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000067370000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244