INFO: task syz.0.238:974 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.238 state:D stack:0 pid:974 tgid:974 ppid:289 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_flush+0x909/0x1d50 fs/fuse/file.c:582
filp_flush fs/open.c:1550 [inline]
filp_close+0xbd/0x160 fs/open.c:1563
__range_close fs/file.c:712 [inline]
__close_range+0x50e/0x6c0 fs/file.c:769
__do_sys_close_range fs/open.c:1616 [inline]
__se_sys_close_range fs/open.c:1613 [inline]
__x64_sys_close_range+0x7e/0x90 fs/open.c:1613
x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f30fab8e929
RSP: 002b:00007ffcb97eec48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f30fadb7ba0 RCX: 00007f30fab8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f30fadb7ba0 R08: 0000000000000114 R09: 00000010b97eef3f
R10: 00007f30fadb7ac0 R11: 0000000000000246 R12: 0000000000009dea
R13: 00007f30fadb5fa0 R14: ffffffffffffffff R15: 00007ffcb97eed60
INFO: task syz.0.238:985 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.238 state:D stack:0 pid:985 tgid:974 ppid:289 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_do_getattr+0x350/0x630 fs/fuse/dir.c:1586
fuse_update_get_attr+0x8cd/0x2600 fs/fuse/dir.c:1642
fuse_getattr+0x3bf/0x630 fs/fuse/dir.c:2482
vfs_getattr_nosec+0x258/0x2f0 fs/stat.c:166
vfs_getattr fs/stat.c:207 [inline]
vfs_statx_path+0x70/0x300 fs/stat.c:251
vfs_statx+0x130/0x200 fs/stat.c:315
vfs_fstatat+0xe5/0x1d0 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat+0xcd/0x340 fs/stat.c:499
__x64_sys_newfstatat+0x9f/0xc0 fs/stat.c:499
x64_sys_call+0x1821/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:263
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f30fab8e929
RSP: 002b:00007f30fb9c5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f30fadb6080 RCX: 00007f30fab8e929
RDX: 0000000000000000 RSI: 00002000000008c0 RDI: ffffffffffffff9c
RBP: 00007f30fac10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f30fadb6080 R15: 00007ffcb97eeae8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0 8824182ce8c593946fea7a5d8bf7bacf32ac00e2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5533 Comm: kworker/1:8 Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0 8824182ce8c593946fea7a5d8bf7bacf32ac00e2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:io_serial_in+0x7b/0xc0 drivers/tty/serial/8250/8250_port.c:406
Code: e8 2a 3e 6e fe 44 89 f9 d3 e3 49 83 c6 08 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 8b 38 c4 fe 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1
RSP: 0018:ffffc9000da47130 EFLAGS: 00000006
RAX: 1ffffffff113b505 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 000000000008f7c8 RDI: 000000000008f7c9
RBP: ffffc9000da47150 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83176c30 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff889dada8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7358782178 CR3: 00000001174c8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_port_in include/linux/serial_core.h:794 [inline]
serial8250_console_write+0x325/0x2130 drivers/tty/serial/8250/8250_port.c:3386
univ8250_console_write+0x6f/0xb0 drivers/tty/serial/8250/8250_core.c:396
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x5e3/0xaa0 kernel/printk/printk.c:3220
__console_flush_and_unlock kernel/printk/printk.c:3279 [inline]
console_unlock+0xe9/0x270 kernel/printk/printk.c:3319
vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2443
dev_vprintk_emit+0x33b/0x400 drivers/base/core.c:4962
dev_printk_emit+0xe1/0x130 drivers/base/core.c:4973
__dev_printk+0x17f/0x1b0 drivers/base/core.c:4985
_dev_err+0x10b/0x160 drivers/base/core.c:5028
hub_port_connect drivers/usb/core/hub.c:5583 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
port_event drivers/usb/core/hub.c:5833 [inline]
hub_event+0x3810/0x41a0 drivers/usb/core/hub.c:5915
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244