INFO: task syz.2.1340:11391 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1340 state:D stack:25960 pid:11391 tgid:11367 ppid:10781 task_flags:0x440140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
xlog_grant_head_wait+0x443/0x9e0 fs/xfs/xfs_log.c:267
xlog_grant_head_check+0x286/0x420 fs/xfs/xfs_log.c:-1
xfs_log_reserve+0x2bc/0x740 fs/xfs/xfs_log.c:437
xfs_trans_reserve fs/xfs/xfs_trans.c:176 [inline]
xfs_trans_alloc+0x29c/0x960 fs/xfs/xfs_trans.c:258
xfs_trans_alloc_inode+0x13c/0x4a0 fs/xfs/xfs_trans.c:1076
xfs_attr_set+0x7fa/0x1210 fs/xfs/libxfs/xfs_attr.c:1098
xfs_xattr_set+0x14d/0x250 fs/xfs/xfs_xattr.c:186
__vfs_setxattr+0x43c/0x480 fs/xattr.c:200
__vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x274/0x600 fs/xattr.c:665
path_setxattrat+0x364/0x3a0 fs/xattr.c:713
__do_sys_lsetxattr fs/xattr.c:754 [inline]
__se_sys_lsetxattr fs/xattr.c:750 [inline]
__x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f228678f749
RSP: 002b:00007f2287587038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f22869e6090 RCX: 00007f228678f749
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000200000000100
RBP: 00007f2286813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22869e6128 R14: 00007f22869e6090 R15: 00007fffba292d48
Showing all locks held in the system:
3 locks held by kworker/u8:1/13:
#0: ffff88814c745148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3232 [inline]
, at: process_scheduled_works+0x9b4/0x1770 kernel/workqueue.c:3340
#1: ffffc90000127bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90000127bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770 kernel/workqueue.c:3340
#2: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0 net/ipv6/addrconf.c:4194
1 lock held by khungtaskd/32:
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5588:
#0: ffff8880348fd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:7/5989:
#0: ffff88807c37b548 ((wq_completion)xfs-sync/loop2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88807c37b548 ((wq_completion)xfs-sync/loop2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770 kernel/workqueue.c:3340
#1: ffffc90004b0fbc0 ((work_completion)(&(&log->l_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90004b0fbc0 ((work_completion)(&(&log->l_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770 kernel/workqueue.c:3340
5 locks held by kworker/u8:23/6519:
#0:
ffff88801aa9f148
((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770 kernel/workqueue.c:3340
#1:
ffffc9001d42fbc0
(net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
(net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770 kernel/workqueue.c:3340
#2:
ffffffff8f304d50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x7a0 net/core/net_namespace.c:670
#3: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: ops_exit_rtnl_list net/core/net_namespace.c:173 [inline]
#3: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x2a4/0x990 net/core/net_namespace.c:248
#4: ffffffff8df475f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#4: ffffffff8df475f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x36e/0x6e0 kernel/rcu/tree_exp.h:956
4 locks held by kworker/u8:26/7784:
#0: ffff8880b863a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
#1: ffff8880b8624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
#2: ffff88802f7b0788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6363 [inline]
#2: ffff88802f7b0788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xb4/0x450 net/wireless/core.c:424
#3: ffff8880b86260d8 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x8ee/0xf30 kernel/time/timer.c:1117
3 locks held by syz.2.1340/11391:
#0: ffff88804da24420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499
#1: ffff8880516c19b0 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#1: ffff8880516c19b0 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0 fs/xattr.c:320
#2: ffff88804da24610 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc+0xd7/0x960 fs/xfs/xfs_trans.c:256
2 locks held by syz.0.1856/13319:
#0: ffffffff8f304d50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cc/0x570 net/core/net_namespace.c:577
#1: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: cfg802154_pernet_exit+0x19/0xe0 net/ieee802154/core.c:351
5 locks held by syz.7.1778/13376:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xf95/0xfe0 kernel/hung_task.c:515
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13376 Comm: syz.7.1778 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__task_state_match kernel/sched/core.c:2193 [inline]
RIP: 0010:ttwu_state_match kernel/sched/core.c:3926 [inline]
RIP: 0010:try_to_wake_up+0xa9/0x12b0 kernel/sched/core.c:4108
Code: c1 08 c1 0f 84 a5 07 00 00 48 8d 55 18 49 89 d5 49 c1 ed 03 43 0f b6 44 25 00 84 c0 0f 85 10 08 00 00 48 89 5c 24 08 44 85 3a <0f> 84 5d 03 00 00 48 89 54 24 10 44 89 74 24 20 48 89 ef e8 ff 11
RSP: 0018:ffffc90000007ca8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88802edf65d0 RCX: dffffc0000000001
RDX: ffff88802edf5b98 RSI: 0000000000000004 RDI: ffffc90000007c00
RBP: ffff88802edf5b80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f80 R12: dffffc0000000000
R13: 1ffff11005dbeb73 R14: 0000000000000000 R15: 0000000000000003
FS: 00007f9be87f66c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9be023f000 CR3: 0000000031e94000 CR4: 0000000000350ef0
Call Trace:
hrtimer_wakeup+0x4e/0x60 kernel/time/hrtimer.c:2013
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x51c/0xc30 kernel/time/hrtimer.c:1841
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2037 [inline]
RIP: 0010:vprintk_emit+0x453/0x550 kernel/printk/printk.c:2425
Code: 0f 84 44 ff ff ff e8 9c 36 20 00 fb eb 44 e8 94 36 20 00 e8 ef df b8 09 4d 85 f6 74 94 e8 85 36 20 00 fb 48 c7 c7 80 59 f3 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 a5 2c
RSP: 0018:ffffc900031f7740 EFLAGS: 00000293
RAX: ffffffff81a0c13b RBX: ffffffff81a0bfb5 RCX: ffff88801c339e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df35980
RBP: ffffc900031f77f0 R08: ffffffff8f822377 R09: 1ffffffff1f0446e
R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 0000000000000026
R13: 0000000000000000 R14: 0000000000000200 R15: 0000000000000000
_printk+0xcf/0x120 kernel/printk/printk.c:2451
__ext4_msg+0x20a/0x2a0 fs/ext4/super.c:992
ext4_parse_param+0x3b3/0x24c0 fs/ext4/super.c:-1
vfs_parse_fs_param+0x1a9/0x420 fs/fs_context.c:146
vfs_parse_fs_qstr fs/fs_context.c:187 [inline]
vfs_parse_fs_string include/linux/fs_context.h:142 [inline]
vfs_parse_monolithic_sep+0x25d/0x320 fs/fs_context.c:227
do_new_mount+0x2cb/0xa10 fs/namespace.c:3708
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount+0x313/0x410 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9bea590eea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f9be87f5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9be87f5ef0 RCX: 00007f9bea590eea
RDX: 0000200000000000 RSI: 00002000000001c0 RDI: 00007f9be87f5eb0
RBP: 0000200000000000 R08: 00007f9be87f5ef0 R09: 0000000001000080
R10: 0000000001000080 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007f9be87f5eb0 R14: 000000000000050a R15: 00002000000008c0