INFO: task syz-executor.5:18682 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25712 pid:18682 tgid:18679 ppid:5094 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
do_rmdir+0x263/0x580 fs/namei.c:4252
__do_sys_rmdir fs/namei.c:4283 [inline]
__se_sys_rmdir fs/namei.c:4281 [inline]
__x64_sys_rmdir+0x49/0x50 fs/namei.c:4281
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f183d27cda9
RSP: 002b:00007f183dfd20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f183d3ac050 RCX: 00007f183d27cda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 00007f183d2c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f183d3ac050 R15: 00007fffc258e3a8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
1 lock held by udevd/4500:
#0: ffff8880b983c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by getty/4798:
#0: ffff88802936e0a0 (&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
1 lock held by syz-executor.4/5084:
#0: ffff888023b760e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888023b760e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888023b760e0 (&type->s_umount_key#70){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:509
2 locks held by kworker/0:8/5182:
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004897d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004897d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
4 locks held by syz-executor.5/18681:
2 locks held by syz-executor.5/18682:
#0: ffff888028ac0420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88803e9302b8 (&sb->s_type->i_mutex_key#27/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88803e9302b8 (&sb->s_type->i_mutex_key#27/1){+.+.}-{3:3}, at: do_rmdir+0x263/0x580 fs/namei.c:4252
1 lock held by syz-executor.3/20256:
#0: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:996
3 locks held by syz-executor.0/20264:
2 locks held by syz-executor.2/20279:
2 locks held by dhcpcd/20312:
#0: ffff8880379ae130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline]
#0: ffff8880379ae130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3202
#1: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:996
1 lock held by dhcpcd/20313:
#0: ffff8880342c2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline]
#0: ffff8880342c2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3202
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19699 Comm: udevd Not tainted 6.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
RIP: 0010:unwind_next_frame+0x1df0/0x29e0 arch/x86/kernel/unwind_orc.c:665
Code: 48 89 df e8 f2 b2 ad 00 4d 39 e6 77 76 48 8b 1b 4c 39 e3 76 6e 4d 8d 7c 24 08 4c 89 e7 48 8b b4 24 90 00 00 00 e8 50 d1 50 00 <4d> 39 f7 76 5b 49 39 df 77 56 4c 3b a4 24 90 00 00 00 77 4c 48 8b
RSP: 0018:ffffc9001a4c7608 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc9001a4c8000 RCX: ffff8880282c5940
RDX: ffff8880282c5940 RSI: ffffc9001a4c7b38 RDI: ffffc9001a4c7b60
RBP: ffffc9001a4c76e0 R08: ffffffff813e2ae0 R09: ffffffff813e2660
R10: 0000000000000003 R11: ffff8880282c5940 R12: ffffc9001a4c7b60
R13: dffffc0000000000 R14: ffffc9001a4c0000 R15: ffffc9001a4c7b68
FS: 00007fd8372a6c80(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555575238f8 CR3: 000000002de36000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x146/0x1a0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x70 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:372 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:389
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:3981 [inline]
__kmalloc_node+0x24e/0x4e0 mm/slub.c:3988
kmalloc_node include/linux/slab.h:610 [inline]
kvmalloc_node+0x72/0x180 mm/util.c:617
kvmalloc include/linux/slab.h:728 [inline]
simple_xattr_alloc+0x43/0xa0 fs/xattr.c:1096
shmem_initxattrs+0x24a/0x450 mm/shmem.c:3635
security_inode_init_security+0x2a7/0x470 security/security.c:1752
shmem_symlink+0x168/0x6a0 mm/shmem.c:3484
vfs_symlink+0x12f/0x2a0 fs/namei.c:4480
do_symlinkat+0x222/0x3a0 fs/namei.c:4506
__do_sys_symlink fs/namei.c:4527 [inline]
__se_sys_symlink fs/namei.c:4525 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4525
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd836f17ce7
Code: f0 ff ff 73 01 c3 48 8b 0d 3e 91 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 11 91 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd05bb9198 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007ffd05bb91a8 RCX: 00007fd836f17ce7
RDX: 0000000000000000 RSI: 00007ffd05bb91a8 RDI: 0000557c19c9e0b0
RBP: 0000557c19caacf0 R08: 0000000000000000 R09: 00007ffd05bb8b18
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000027b1
R13: 0000557c19c9e5a0 R14: 0000000000000008 R15: 0000557c19c89910