INFO: task syz.3.3814:19689 blocked for more than 144 seconds.
Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3814 state:D stack:24968 pid:19689 tgid:19688 ppid:18507 task_flags:0x440140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5367 [inline]
__schedule+0x1b18/0x50e0 kernel/sched/core.c:6748
__schedule_loop kernel/sched/core.c:6825 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6840
xlog_grant_head_wait+0x441/0xa80 fs/xfs/xfs_log.c:266
xlog_grant_head_check+0x368/0x510
xfs_log_reserve+0x364/0x8f0 fs/xfs/xfs_log.c:436
xfs_trans_reserve+0x20a/0x640 fs/xfs/xfs_trans.c:196
xfs_trans_alloc+0x3f2/0x7f0 fs/xfs/xfs_trans.c:284
xfs_trans_alloc_inode+0x1ad/0x600 fs/xfs/xfs_trans.c:1096
xfs_attr_set+0x8ca/0x1470 fs/xfs/libxfs/xfs_attr.c:1098
xfs_xattr_set+0x201/0x350 fs/xfs/xfs_xattr.c:186
__vfs_setxattr+0x46a/0x4a0 fs/xattr.c:200
__vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
vfs_setxattr+0x223/0x430 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x2dd/0x480 fs/xattr.c:665
path_setxattrat+0x3f7/0x4c0 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+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe87f18d169
RSP: 002b:00007fe88000c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007fe87f3a5fa0 RCX: 00007fe87f18d169
RDX: 0000200000000240 RSI: 0000200000000240 RDI: 00002000000001c0
RBP: 00007fe87f20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe87f3a5fa0 R15: 00007fff7435fb18
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0:
ffffffff8eb3a760 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
ffffffff8eb3a760 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
ffffffff8eb3a760 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6761
2 locks held by kworker/u8:5/1093:
2 locks held by getty/5582:
#0:
ffff88814d24e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ff62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x53d/0x16b0 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:11/7959:
11 locks held by kworker/1:3/18496:
3 locks held by syz.3.3814/19689:
#0: ffff888066f6c420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:556
#1: ffff888053c9a230 (&sb->s_type->i_mutex_key#21){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff888053c9a230 (&sb->s_type->i_mutex_key#21){++++}-{4:4}, at: vfs_setxattr+0x1e3/0x430 fs/xattr.c:320
#2: ffff888066f6c610 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0x1ad/0x600 fs/xfs/xfs_trans.c:1096
2 locks held by syz-executor/21250:
#0: ffffffff8fed6108 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fed6108 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x767/0xd70 net/core/rtnetlink.c:6918
#1:
ffffffff8eb3fc78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
ffffffff8eb3fc78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x384/0x830 kernel/rcu/tree_exp.h:998
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18496 Comm: kworker/1:3 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:409
Code: 80 82 37 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 61 a1 9f fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d e9 87 60 84 fb 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc9000336dcf8 EFLAGS: 00000002
RAX: 1ffffffff34fea00 RBX: ffffffff9a7f5540 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 00000000000fffff RDI: 0000000000100000
RBP: 0000000000000000 R08: ffffffff858be046 R09: 1ffff11004979046
R10: dffffc0000000000 R11: ffffffff858be000 R12: 0000000000000020
R13: 1ffffffff34feafa R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125324000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000090 CR3: 000000003e4e0000 CR4: 0000000000350ef0
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr+0x1b3/0x320 drivers/tty/serial/8250/8250_port.c:2100
fifo_wait_for_lsr drivers/tty/serial/8250/8250_port.c:3357 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3380 [inline]
serial8250_console_write+0x1350/0x1e00 drivers/tty/serial/8250/8250_port.c:3465
console_emit_next_record kernel/printk/printk.c:3120 [inline]
console_flush_all+0x86d/0xec0 kernel/printk/printk.c:3208
__console_flush_and_unlock kernel/printk/printk.c:3267 [inline]
console_unlock+0x151/0x3b0 kernel/printk/printk.c:3307
vprintk_emit+0x732/0xa10 kernel/printk/printk.c:2432
dev_vprintk_emit+0x358/0x420 drivers/base/core.c:4891
dev_printk_emit+0xdf/0x130 drivers/base/core.c:4902
_dev_warn+0x12d/0x180 drivers/base/core.c:4958
hid_parser_main+0x81b/0xc00 drivers/hid/hid-core.c:660
hid_open_report+0xbdc/0x1590 drivers/hid/hid-core.c:1324
hid_parse include/linux/hid.h:1124 [inline]
apple_probe+0xdc/0x10e0 drivers/hid/hid-apple.c:924
__hid_device_probe drivers/hid/hid-core.c:2713 [inline]
hid_device_probe+0x3c1/0x710 drivers/hid/hid-core.c:2750
really_probe+0x2bb/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x25a/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
hid_add_device+0x3b6/0x520 drivers/hid/hid-core.c:2896
usbhid_probe+0xd96/0x1280 drivers/hid/usbhid/hid-core.c:1431
usb_probe_interface+0x652/0xbc0 drivers/usb/core/driver.c:396
really_probe+0x2bb/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x25a/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
usb_set_configuration+0x1999/0x1fe0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:250
usb_probe_device+0x1ba/0x380 drivers/usb/core/driver.c:291
really_probe+0x2bb/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x25a/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
usb_new_device+0x1052/0x19a0 drivers/usb/core/hub.c:2663
hub_port_connect drivers/usb/core/hub.c:5533 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
port_event drivers/usb/core/hub.c:5833 [inline]
hub_event+0x2bfd/0x50f0 drivers/usb/core/hub.c:5915
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac5/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245