INFO: task syz.4.19:6951 blocked for more than 143 seconds.
Tainted: G W 6.15.0-rc5-next-20250508-syzkaller-09729-gf48887a98b78 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.19 state:D stack:27432 pid:6951 tgid:6932 ppid:6659 task_flags:0x440140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6862
xfs_ail_push_all_sync+0x1d0/0x280 fs/xfs/xfs_trans_ail.c:721
xfs_log_quiesce+0xb9/0x3d0 fs/xfs/xfs_log.c:1019
xfs_fs_freeze+0x7a/0x130 fs/xfs/xfs_super.c:1007
freeze_super+0x5e7/0xdf0 fs/super.c:2191
fs_bdev_freeze+0x145/0x220 fs/super.c:1534
bdev_freeze+0xb9/0x1a0 block/bdev.c:298
xfs_fs_goingdown+0x7e/0x120 fs/xfs/xfs_fsops.c:465
xfs_file_ioctl+0xc53/0x1320 fs/xfs/xfs_ioctl.c:1378
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xae/0x100 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d27d80809
RSP: 002b:00007f7d28abc058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7d27f46080 RCX: 00007f7d27d80809
RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000004
RBP: 00007f7d27df393e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7d27f46080 R15: 00007fff07c17618
INFO: task syz.1.16:6967 blocked for more than 144 seconds.
Tainted: G W 6.15.0-rc5-next-20250508-syzkaller-09729-gf48887a98b78 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.16 state:D stack:25576 pid:6967 tgid:6954 ppid:6647 task_flags:0x440140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6862
xfs_ail_push_all_sync+0x1d0/0x280 fs/xfs/xfs_trans_ail.c:721
xfs_log_quiesce+0xb9/0x3d0 fs/xfs/xfs_log.c:1019
xfs_fs_freeze+0x7a/0x130 fs/xfs/xfs_super.c:1007
freeze_super+0x5e7/0xdf0 fs/super.c:2191
fs_bdev_freeze+0x145/0x220 fs/super.c:1534
bdev_freeze+0xb9/0x1a0 block/bdev.c:298
xfs_fs_goingdown+0x7e/0x120 fs/xfs/xfs_fsops.c:465
xfs_file_ioctl+0xc53/0x1320 fs/xfs/xfs_ioctl.c:1378
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xae/0x100 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe96a380809
RSP: 002b:00007fe96b0a0058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe96a546080 RCX: 00007fe96a380809
RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000004
RBP: 00007fe96a3f393e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe96a546080 R15: 00007ffe8b79fb48
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G W 6.15.0-rc5-next-20250508-syzkaller-09729-gf48887a98b78 #0 PREEMPT(full)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Call Trace:
dump_stack_lvl+0xfc/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace+0x22f/0x2e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x102/0x210 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xb90/0xbd0 kernel/hung_task.c:470
kthread+0x5fd/0x770 kernel/kthread.c:464
ret_from_fork+0x2ba/0x570 arch/x86/kernel/process.c:148
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: 0 Comm: swapper/0 Tainted: G W 6.15.0-rc5-next-20250508-syzkaller-09729-gf48887a98b78 #0 PREEMPT(full)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c3 5f 14 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8ca07da0 EFLAGS: 000002c2
RAX: d74681c816376400 RBX: ffffffff8188c848 RCX: d74681c816376400
RDX: 0000000000000001 RSI: ffffffff8aa25cc0 RDI: ffffffff8188c848
RBP: ffffffff8ca07ed0 R08: ffff8880b8a32f5b R09: 1ffff110171465eb
R10: dffffc0000000000 R11: ffffed10171465ec R12: ffffffff8e478cf0
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1952a10
FS: 0000000000000000(0000) GS:ffff8881281a9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556f0d95c8 CR3: 000000002499c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:743
default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:423
rest_init+0x230/0x250 init/main.c:744
start_kernel+0x399/0x400 init/main.c:1101
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:308
x86_64_start_kernel+0x66/0x70 arch/x86/kernel/head64.c:289
common_startup_64+0x13e/0x147