INFO: task syz.3.803:9554 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.803 state:D stack:24384 pid:9554 tgid:9553 ppid:5840 task_flags:0x440140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7004
xlog_grant_head_wait+0x457/0xa60 fs/xfs/xfs_log.c:217
xlog_grant_head_check+0x286/0x420 fs/xfs/xfs_log.c:-1
xfs_log_reserve+0x2bc/0x7e0 fs/xfs/xfs_log.c:387
xfs_trans_reserve fs/xfs/xfs_trans.c:174 [inline]
xfs_trans_alloc+0x29c/0x9b0 fs/xfs/xfs_trans.c:256
xfs_trans_alloc_inode+0x13c/0x4a0 fs/xfs/xfs_trans.c:1080
xfs_attr_set+0x82e/0x1410 fs/xfs/libxfs/xfs_attr.c:1184
xfs_xattr_set+0x188/0x2a0 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+0x163/0x360 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x296/0x630 fs/xattr.c:664
path_setxattrat+0x3eb/0x440 fs/xattr.c:708
__do_sys_lsetxattr fs/xattr.c:749 [inline]
__se_sys_lsetxattr fs/xattr.c:745 [inline]
__x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:745
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d2e19bf79
RSP: 002b:00007f1d2efaa028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f1d2e415fa0 RCX: 00007f1d2e19bf79
RDX: 0000200000000080 RSI: 0000200000000100 RDI: 0000200000000180
RBP: 00007f1d2e2327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d2e416038 R14: 00007f1d2e415fa0 R15: 00007ffec8bf9808
INFO: task syz.3.803:9611 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.803 state:D stack:27824 pid:9611 tgid:9553 ppid:5840 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7004
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7061
rwsem_down_write_slowpath+0x899/0x1040 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1bc/0x200 kernel/locking/rwsem.c:1591
inode_lock include/linux/fs.h:1028 [inline]
process_measurement+0x451/0x1c80 security/integrity/ima/ima_main.c:282
ima_file_check+0xe1/0x130 security/integrity/ima/ima_main.c:667
security_file_post_open+0xb3/0x260 security/security.c:2652
do_open fs/namei.c:4673 [inline]
path_openat+0x2e4d/0x3860 fs/namei.c:4830
do_file_open+0x23e/0x4a0 fs/namei.c:4859
do_sys_openat2+0x113/0x200 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d2e19bf79
RSP: 002b:00007f1d2ef89028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1d2e416090 RCX: 00007f1d2e19bf79
RDX: 0000000000183341 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f1d2e2327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000045 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d2e416128 R14: 00007f1d2e416090 R15: 00007ffec8bf9808
Showing all locks held in the system:
2 locks held by kworker/1:1/29:
#0: ffff888079f1f948 ((wq_completion)xfs-sync/loop3){+.+.}-{0:0}, at: process_one_work+0x855/0x1650 kernel/workqueue.c:3254
#1: ffffc90000a57c40 ((work_completion)(&(&log->l_work)->work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650 kernel/workqueue.c:3255
1 lock held by khungtaskd/31:
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
5 locks held by kworker/u8:4/58:
4 locks held by kworker/u8:8/1105:
1 lock held by dhcpcd/5489:
#0: ffffffff8fbcd588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff8fbcd588 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_deladdr+0x1c1/0x790 net/ipv4/devinet.c:670
2 locks held by getty/5583:
#0: ffff8880335780a0 (&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+0x45c/0x13c0 drivers/tty/n_tty.c:2211
1 lock held by udevd/5977:
#0: ffff888026bf8358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30 block/bdev.c:961
3 locks held by syz.3.803/9554:
#0: ffff888026e48420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff88805b35ce30 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#1: ffff88805b35ce30 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:320
#2: ffff888026e48610 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc+0xd7/0x9b0 fs/xfs/xfs_trans.c:254
2 locks held by syz.3.803/9611:
#0: ffff888026e48420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff88805b35ce30 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#1: ffff88805b35ce30 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: process_measurement+0x451/0x1c80 security/integrity/ima/ima_main.c:282
2 locks held by dhcpcd/11903:
#0: ffff88805b294cc8 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#0: ffff88805b294cc8 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250 net/socket.c:665
#1: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#1: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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:161 [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+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:lockdep_softirqs_on+0x34/0x180 kernel/locking/lockdep.c:4528
Code: 48 8b 1d d7 85 7a 11 83 3d d8 4d 70 0e 00 0f 84 11 01 00 00 65 8b 05 6b cb 7a 11 85 c0 0f 85 02 01 00 00 83 bb 14 0b 00 00 00 <0f> 85 f5 00 00 00 83 3d 1f ea 85 18 00 75 0d 9c 58 a9 00 02 00 00
RSP: 0018:ffffc900001179c8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88801ded8000 RCX: 0000000080000202
RDX: 0000000000000000 RSI: ffffffff8c27aae0 RDI: ffffffff89744766
RBP: 0000000000000000 R08: ffffffff901195b7 R09: 1ffffffff20232b6
R10: dffffc0000000000 R11: fffffbfff20232b7 R12: 0000000000000ec0
R13: ffffffff89744766 R14: ffffffff89744766 R15: ffff888140abb8c0
FS: 0000000000000000(0000) GS:ffff888125460000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3c0551000 CR3: 00000000767ce000 CR4: 00000000003526f0
Call Trace:
__local_bh_enable_ip+0x8c/0x130 kernel/softirq.c:438
local_bh_enable include/linux/bottom_half.h:33 [inline]
__alloc_skb+0x1aa/0x7d0 net/core/skbuff.c:697
alloc_skb include/linux/skbuff.h:1383 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
nsim_dev_trap_report_work+0x29a/0xb80 drivers/net/netdevsim/dev.c:922
process_one_work+0x949/0x1650 kernel/workqueue.c:3279
process_scheduled_works kernel/workqueue.c:3362 [inline]
worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245