INFO: task syz.1.28:3712 blocked for more than 143 seconds.
Not tainted 5.15.164-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.28 state:D stack:27024 pid: 3712 ppid: 3569 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
d_wait_lookup+0x1f0/0x2c0 fs/dcache.c:2569
d_alloc_parallel+0xa5e/0x1390 fs/dcache.c:2651
__lookup_slow+0x111/0x3d0 fs/namei.c:1648
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x48c/0x610 fs/namei.c:1976
link_path_walk+0x642/0xd90
path_openat+0x249/0x2f20 fs/namei.c:3738
do_filp_open+0x21c/0x460 fs/namei.c:3769
do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f222393c9b9
RSP: 002b:00007f2221b54038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2223ad9208 RCX: 00007f222393c9b9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f22239aa8d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2223ad9208 R15: 00007ffe609289b8
Showing all locks held in the system:
3 locks held by kworker/0:0/7:
#0: ffff888011c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90000cc7d20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff888075509240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2cd/0x4120 drivers/net/netdevsim/fib.c:1478
1 lock held by khungtaskd/27:
#0: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3327:
#0: ffff888024964098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc9000209b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
3 locks held by kworker/1:3/3611:
2 locks held by kworker/0:5/3615:
#0: ffff888011c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900032d7d20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
4 locks held by kworker/u4:6/3696:
#0: ffff888011dd5138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90004a47d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8da24d10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:561
#3: ffffffff8c9240e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#3: ffffffff8c9240e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
1 lock held by syz.1.28/3703:
1 lock held by syz.1.28/3704:
1 lock held by syz.1.28/3712:
#0: ffff88806233c188 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:799 [inline]
#0: ffff88806233c188 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1679
2 locks held by kworker/u4:13/3917:
1 lock held by syz.0.104/4025:
1 lock held by syz.0.104/4042:
#0: ffff888056104188 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:799 [inline]
#0: ffff888056104188 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1679
1 lock held by syz.2.144/4218:
#0: ffff88806233cc18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:799 [inline]
#0: ffff88806233cc18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1679
1 lock held by syz.2.144/4219:
#0: ffff88806233cc18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:799 [inline]
#0: ffff88806233cc18 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1679
1 lock held by syz.2.144/4221:
2 locks held by syz.3.160/4386:
1 lock held by syz.3.160/4391:
#0: ffff8880561046d0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:799 [inline]
#0: ffff8880561046d0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1679
1 lock held by syz.3.160/4392:
1 lock held by syz-executor/5346:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.164-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3704 Comm: syz.1.28 Not tainted 5.15.164-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:validate_chain+0x8c/0x5930 kernel/locking/lockdep.c:3744
Code: 81 48 8d 8c 24 00 01 00 00 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 21 48 b8 f2 f2 f2 00 f2 f2 f2 00 4a 89 44 21 09 <48> b8 f2 f2 f2 f2 f2 00 00 00 4a 89 44 21 17 48 b8 f2 f2 f2 f2 f2
RSP: 0018:ffffc900045ed960 EFLAGS: 00000802
RAX: 00f2f2f200f2f2f2 RBX: ffffffff8f966fc0 RCX: 1ffff920008bdb4c
RDX: 0000000000000000 RSI: ffff8880791b4698 RDI: ffff8880791b3b80
RBP: ffffc900045edc10 R08: dffffc0000000000 R09: fffffbfff1f8e019
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880791b4668 R14: 25daa7f9b0f72123 R15: ffff8880791b46b8
FS: 00007f2221d986c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4366f75440 CR3: 0000000073140000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
page_evictable+0x1c/0x2c0 mm/internal.h:82
shrink_page_list+0x879/0x7540 mm/vmscan.c:1404
shrink_inactive_list mm/vmscan.c:2216 [inline]
shrink_list mm/vmscan.c:2443 [inline]
shrink_lruvec+0x14ae/0x2b90 mm/vmscan.c:2762
shrink_node_memcgs mm/vmscan.c:2949 [inline]
shrink_node+0x10b3/0x26d0 mm/vmscan.c:3072
shrink_zones mm/vmscan.c:3278 [inline]
do_try_to_free_pages+0x697/0x17b0 mm/vmscan.c:3333
try_to_free_mem_cgroup_pages+0x44c/0xa60 mm/vmscan.c:3647
try_charge_memcg+0x4f4/0x1530 mm/memcontrol.c:2651
obj_cgroup_charge_pages+0xab/0x1d0 mm/memcontrol.c:3015
obj_cgroup_charge+0x19e/0x390 mm/memcontrol.c:3296
memcg_slab_pre_alloc_hook mm/slab.h:287 [inline]
slab_pre_alloc_hook+0xa6/0xc0 mm/slab.h:497
slab_alloc_node mm/slub.c:3134 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
alloc_buffer_head+0x20/0xf0 fs/buffer.c:3311
alloc_page_buffers+0x3a3/0x660 fs/buffer.c:832
create_empty_buffers+0x3a/0x6d0 fs/buffer.c:1562
create_page_buffers+0x1d4/0x330 fs/buffer.c:1679
block_read_full_page+0xe6/0xde0 fs/buffer.c:2270
do_read_cache_page+0x752/0x1040
read_mapping_page include/linux/pagemap.h:515 [inline]
dir_get_page fs/sysv/dir.c:58 [inline]
sysv_find_entry+0x1b0/0x650 fs/sysv/dir.c:146
sysv_inode_by_name+0x9e/0x3f0 fs/sysv/dir.c:360
sysv_lookup+0x63/0xe0 fs/sysv/namei.c:38
__lookup_slow+0x275/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x48c/0x610 fs/namei.c:1976
link_path_walk+0x642/0xd90
path_lookupat+0xa9/0x450 fs/namei.c:2454
do_o_path+0x91/0x230 fs/namei.c:3713
path_openat+0x2944/0x2f20 fs/namei.c:3735
do_filp_open+0x21c/0x460 fs/namei.c:3769
do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f222393c9b9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2221d98038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2223ad9058 RCX: 00007f222393c9b9
RDX: 0000000000200002 RSI: 0000000020000300 RDI: ffffffffffffff9c
RBP: 00007f22239aa8d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2223ad9058 R15: 00007ffe609289b8