INFO: task syz.0.17:5946 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:24848 pid:5946 ppid:5897 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
xlog_grant_head_wait+0x35c/0x820 fs/xfs/xfs_log.c:307
xlog_grant_head_check+0x25e/0x380 include/linux/spinlock.h:-1
xfs_log_reserve+0x348/0x970 fs/xfs/xfs_log.c:486
xfs_trans_reserve+0x225/0x690 fs/xfs/xfs_trans.c:194
xfs_trans_alloc+0x3df/0x790 fs/xfs/xfs_trans.c:283
xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
xfs_attr_set+0x930/0x13e0 fs/xfs/libxfs/xfs_attr.c:1075
xfs_attr_change fs/xfs/xfs_xattr.c:117 [inline]
xfs_xattr_set+0x119/0x210 fs/xfs/xfs_xattr.c:162
__vfs_setxattr+0x431/0x470 fs/xattr.c:201
__vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235
vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322
do_setxattr fs/xattr.c:630 [inline]
path_setxattr+0x362/0x550 fs/xattr.c:659
__do_sys_setxattr fs/xattr.c:677 [inline]
__se_sys_setxattr fs/xattr.c:673 [inline]
__x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f872df8f749
RSP: 002b:00007fffdc4a0578 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f872e1e5fa0 RCX: 00007f872df8f749
RDX: 0000200000000240 RSI: 0000200000000140 RDI: 0000200000000080
RBP: 00007f872e013f91 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000fe26 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f872e1e5fa0 R14: 00007f872e1e5fa0 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
5 locks held by kworker/u4:6/1136:
2 locks held by getty/5529:
#0: ffff8880310a20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
3 locks held by syz.0.17/5946:
#0: ffff88807f764418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f560348 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f560348 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88807f764608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.1.18/5979:
#0: ffff888078586418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f561a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f561a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888078586608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.2.19/6011:
#0: ffff88801cfe8418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f563988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f563988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88801cfe8608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.3.20/6041:
#0: ffff88802effe418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f67b988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f67b988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88802effe608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.4.21/6077:
#0: ffff88805f99a418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f67d888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f67d888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88805f99a608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.5.22/6117:
#0: ffff888055794418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f5650c8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f5650c8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888055794608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.6.23/6153:
#0: ffff888028b58418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f566fc8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f566fc8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888028b58608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.7.24/6188:
#0: ffff88805fb74418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f4c8b08 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f4c8b08 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88805fb74608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.8.25/6224:
#0: ffff88802e6e2418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f4caa08 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f4caa08 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88802e6e2608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
1 lock held by syz-executor/6240:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 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+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5886 Comm: kworker/u5:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: hci9 hci_rx_work
RIP: 0010:io_serial_in+0x77/0xb0 drivers/tty/serial/8250/8250_port.c:417
Code: e8 8e fb e8 fc 44 89 f9 d3 e3 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 5f 69 40 fd 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 44 89 f9 80 e1 07 38 c1 7c aa 4c
RSP: 0018:ffffc900033971b8 EFLAGS: 00000006
RAX: 1ffffffff2e38805 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020
RBP: ffffc900033973b0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000672e18 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff971c4240 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61701fed00 CR3: 00000000765f8000 CR4: 00000000003506e0
Call Trace:
serial_port_in include/linux/serial_core.h:673 [inline]
serial8250_console_write+0x24b/0x17a0 drivers/tty/serial/8250/8250_port.c:3438
console_emit_next_record kernel/printk/printk.c:2944 [inline]
console_flush_all+0x6cd/0xd00 kernel/printk/printk.c:3000
console_unlock+0xae/0x340 kernel/printk/printk.c:3069
vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341
_printk+0xd0/0x110 kernel/printk/printk.c:2366
bt_warn+0x10c/0x160 net/bluetooth/lib.c:235
hci_cc_func net/bluetooth/hci_event.c:4181 [inline]
hci_cmd_complete_evt+0x493/0xa40 net/bluetooth/hci_event.c:4205
hci_event_func net/bluetooth/hci_event.c:7454 [inline]
hci_event_packet+0x795/0x1210 net/bluetooth/hci_event.c:7509
hci_rx_work+0x43a/0xd80 net/bluetooth/hci_core.c:4018
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293