INFO: task syz.6.378:5516 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.378 state:D stack:24208 pid:5516 ppid:4858 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
mb_cache_entry_wait_unused+0x17a/0x270 fs/mbcache.c:148
ext4_evict_ea_inode+0x149/0x2f0 fs/ext4/xattr.c:441
ext4_evict_inode+0x176/0x1110 fs/ext4/inode.c:181
evict+0x4c9/0x8d0 fs/inode.c:705
ext4_xattr_ibody_set+0x509/0x690 fs/ext4/xattr.c:2228
ext4_xattr_set_handle+0xcdd/0x1570 fs/ext4/xattr.c:2387
ext4_xattr_set+0x242/0x320 fs/ext4/xattr.c:2501
__vfs_setxattr+0x3e0/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216
vfs_setxattr+0x167/0x2e0 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x346/0x360 fs/xattr.c:617
path_setxattr+0x147/0x290 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f3879c799
RSP: 002b:00007f1f395b5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f1f38a15fa0 RCX: 00007f1f3879c799
RDX: 0000200000001400 RSI: 0000200000000100 RDI: 0000200000000380
RBP: 00007f1f38832bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f38a16038 R14: 00007f1f38a15fa0 R15: 00007ffe8afa2898
INFO: task syz.6.378:5530 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.378 state:D stack:26960 pid:5530 ppid:4858 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x2da/0x3f0 fs/inode.c:995
iget_locked+0xc0/0x830 fs/inode.c:1360
__ext4_iget+0x233/0x3e40 fs/ext4/inode.c:4863
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1497 [inline]
ext4_xattr_inode_lookup_create+0x4cd/0x1e60 fs/ext4/xattr.c:1536
ext4_xattr_ibody_set+0x1fe/0x690 fs/ext4/xattr.c:2210
ext4_xattr_set_handle+0xcdd/0x1570 fs/ext4/xattr.c:2387
ext4_xattr_set+0x242/0x320 fs/ext4/xattr.c:2501
__vfs_setxattr+0x3e0/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216
vfs_setxattr+0x167/0x2e0 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x346/0x360 fs/xattr.c:617
path_setxattr+0x147/0x290 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f3879c799
RSP: 002b:00007f1f39594028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f1f38a16090 RCX: 00007f1f3879c799
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000380
RBP: 00007f1f38832bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f38a16128 R14: 00007f1f38a16090 R15: 00007ffe8afa2898
INFO: task syz.6.378:5531 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.378 state:D stack:28528 pid:5531 ppid:4858 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
lock_two_nondirectories+0xd5/0x150 fs/inode.c:1208
vfs_rename+0x7e3/0x1100 fs/namei.c:4853
do_renameat2+0x8e5/0xce0 fs/namei.c:5035
__do_sys_rename fs/namei.c:5081 [inline]
__se_sys_rename fs/namei.c:5079 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5079
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f3879c799
RSP: 002b:00007f1f39573028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f1f38a16180 RCX: 00007f1f3879c799
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000200000000080
RBP: 00007f1f38832bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f38a16218 R14: 00007f1f38a16180 R15: 00007ffe8afa2898
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by ksoftirqd/1/21:
#0: ffff8880b8f3ab18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:538
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
3 locks held by kworker/u4:2/33:
#0: ffff8880b8f3ab18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:538
#1: ffff8880b8f27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x398/0x6d0 kernel/sched/psi.c:999
#2: ffff8880b8f28458 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x6bf/0xd00 kernel/time/timer.c:1112
3 locks held by kworker/1:2/2120:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc900066f7d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3c0/0x890 kernel/rcu/tree_exp.h:962
2 locks held by getty/4028:
#0: ffff88814cec5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
3 locks held by syz.6.378/5516:
#0: ffff888054a9e460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402
#1: ffff88804dc7d440 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff88804dc7d440 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: vfs_setxattr+0x140/0x2e0 fs/xattr.c:308
#2: ffff88804dc7d108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline]
#2: ffff88804dc7d108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x18c/0x1570 fs/ext4/xattr.c:2314
3 locks held by syz.6.378/5530:
#0: ffff888054a9e460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402
#1: ffff88804dc7f258 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff88804dc7f258 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: vfs_setxattr+0x140/0x2e0 fs/xattr.c:308
#2: ffff88804dc7ef20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline]
#2: ffff88804dc7ef20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x18c/0x1570 fs/ext4/xattr.c:2314
5 locks held by syz.6.378/5531:
#0: ffff888054a9e460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402
#1: ffff888054a9e748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: lock_rename fs/namei.c:3046 [inline]
#1: ffff888054a9e748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: do_renameat2+0x363/0xce0 fs/namei.c:4974
#2: ffff88804dc7c030 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
#2: ffff88804dc7c030 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline]
#2: ffff88804dc7c030 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3047 [inline]
#2: ffff88804dc7c030 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_renameat2+0x3fa/0xce0 fs/namei.c:4974
#3: ffff88804dc7e850 (&type->i_mutex_dir_key#3/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline]
#3: ffff88804dc7e850 (&type->i_mutex_dir_key#3/5){+.+.}-{3:3}, at: do_renameat2+0x435/0xce0 fs/namei.c:4974
#4: ffff88804dc7d440 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#4: ffff88804dc7d440 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: lock_two_nondirectories+0xd5/0x150 fs/inode.c:1208
2 locks held by kworker/1:16/7811:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90005fffd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
1 lock held by dhcpcd/9499:
#0: ffff888056cd4410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888056cd4410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline]
#0: ffff888056cd4410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1399
2 locks held by dhcpcd/9500:
#0: ffff88804dfd5c10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff88804dfd5c10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline]
#0: ffff88804dfd5c10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1399
#1: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#1: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3c0/0x890 kernel/rcu/tree_exp.h:962
2 locks held by dhcpcd-run-hook/9514:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2120 Comm: kworker/1:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
RIP: 0010:delay_tsc+0x61/0xc0 arch/x86/lib/delay.c:90
Code: c7 4d 29 f7 49 39 df 73 53 bf 01 00 00 00 e8 76 c8 38 f7 65 8b 05 37 4d e2 75 85 c0 74 1c f3 90 bf 01 00 00 00 e8 cf c6 38 f7 fa 97 0c 00 39 c5 75 0e 0f 01 f9 66 90 eb bd e8 6a 61 e0 f6 eb
RSP: 0018:ffffc900066f6dd8 EFLAGS: 00000002
RAX: 0000000000000605 RBX: 0000000000000899 RCX: ffffffff96bfc103
RDX: 0000000000000089 RSI: ffffffff8adf0dc0 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff888024300237 R09: 1ffff11004860046
R10: dffffc0000000000 R11: ffffed1004860047 R12: dffffc0000000000
R13: 00000000000026f2 R14: 00000089236adfe0 R15: 00000000000000a0
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a1cfe94e8 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2107 [inline]
fifo_wait_for_lsr drivers/tty/serial/8250/8250_port.c:3366 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3388 [inline]
serial8250_console_write+0xf32/0x17f0 drivers/tty/serial/8250/8250_port.c:3473
call_console_driver kernel/printk/printk.c:1977 [inline]
console_emit_next_record+0x79e/0xba0 kernel/printk/printk.c:2777
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x4b3/0x6a0 kernel/printk/printk.c:2303
_printk+0xda/0x130 kernel/printk/printk.c:2328
gred_dequeue+0x49a/0x670 net/sched/sch_gred.c:273
dequeue_skb net/sched/sch_generic.c:295 [inline]
qdisc_restart net/sched/sch_generic.c:400 [inline]
__qdisc_run+0x24b/0x1590 net/sched/sch_generic.c:418
__dev_xmit_skb net/core/dev.c:3983 [inline]
__dev_queue_xmit+0x11e0/0x37f0 net/core/dev.c:4325
dev_queue_xmit include/linux/netdevice.h:3051 [inline]
neigh_hh_output include/net/neighbour.h:529 [inline]
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xd9f/0x15d0 net/ipv6/ip6_output.c:138
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x53a/0x970 net/ipv6/ip6_udp_tunnel.c:109
send6+0x5e6/0x920 drivers/net/wireguard/socket.c:152
wg_socket_send_skb_to_peer+0x10d/0x1c0 drivers/net/wireguard/socket.c:178
wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
wg_packet_tx_worker+0x1c4/0x7c0 drivers/net/wireguard/send.c:276
process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295