INFO: task syz.1.20243:27962 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.20243 state:D stack:0 pid:27962 tgid:27962 ppid:27014 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5929 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7755
__schedule_loop kernel/sched/core.c:7836 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7851
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+0xc0/0x160 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: 0033:0x7f5ae5f8e929
RSP: 002b:00007ffddd654a48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 000000000017197d RCX: 00007f5ae5f8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5ae61b7ba0 R08: 0000000000000001 R09: 0000001cdd654d3f
R10: 00007f5ae5e00000 R11: 0000000000000246 R12: 00007f5ae61b5fac
R13: 00007f5ae61b5fa0 R14: ffffffffffffffff R15: 00007ffddd654b60
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0 e1c904518e9113895a28c59b25a6002cdacb68bf
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: 1378 Comm: syz.5.22233 Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0 e1c904518e9113895a28c59b25a6002cdacb68bf
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:io_serial_in+0x7b/0xc0 drivers/tty/serial/8250/8250_port.c:406
Code: e8 ea 42 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 eb 3a 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:ffffc90004c56b30 EFLAGS: 00000002
RAX: 1ffffffff113b560 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 000000000000cf0b RDI: 000000000000cf0c
RBP: ffffc90004c56b50 R08: ffff8881016b4107 R09: 1ffff110202d6820
R10: 0000000000000000 R11: ffffffff83175ff0 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff889dada8 R15: 0000000000000000
FS: 00007f35481f76c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3407f7 CR3: 0000000144c6a000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000ff8d
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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 drivers/tty/serial/8250/8250_port.c:2069 [inline]
fifo_wait_for_lsr drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3337 [inline]
serial8250_console_write+0x1392/0x2130 drivers/tty/serial/8250/8250_port.c:3422
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+0x5e6/0xaa0 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
vprintk_default+0x2a/0x40 kernel/printk/printk.c:2458
vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
_printk+0xd0/0x120 kernel/printk/printk.c:2468
__nla_validate_parse+0x256a/0x2d50 lib/nlattr.c:647
__nla_parse+0x46/0x60 lib/nlattr.c:732
__nlmsg_parse include/net/netlink.h:761 [inline]
genl_family_rcv_msg_attrs_parse+0x1da/0x390 net/netlink/genetlink.c:945
genl_family_rcv_msg_doit+0xcd/0x330 net/netlink/genetlink.c:1093
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x609/0x7a0 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x22b/0x4a0 net/netlink/af_netlink.c:2537
genl_rcv+0x2c/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
netlink_unicast+0x8c9/0xa60 net/netlink/af_netlink.c:1342
netlink_sendmsg+0x7f0/0xaf0 net/netlink/af_netlink.c:1886
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xa18/0xa70 net/socket.c:2610
___sys_sendmsg+0x220/0x2a0 net/socket.c:2664
__sys_sendmsg net/socket.c:2693 [inline]
__do_sys_sendmsg net/socket.c:2702 [inline]
__se_sys_sendmsg net/socket.c:2700 [inline]
__x64_sys_sendmsg+0x1eb/0x2c0 net/socket.c:2700
x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47
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: 0033:0x7f3549b8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f35481f7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3549db5fa0 RCX: 00007f3549b8e929
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: 0000000000000005
RBP: 00007f3549c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3549db5fa0 R15: 00007ffee3b0d1d8