INFO: task syz-executor:5867 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-next-20250814-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21960 pid:5867 tgid:5867 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
netfs_wait_for_outstanding_io include/linux/netfs.h:551 [inline]
v9fs_evict_inode+0x170/0x320 fs/9p/vfs_inode.c:348
evict+0x501/0x9c0 fs/inode.c:810
__dentry_kill+0x209/0x660 fs/dcache.c:669
dput+0x19f/0x2b0 fs/dcache.c:911
shrink_dcache_for_umount+0xa0/0x170 fs/dcache.c:1621
generic_shutdown_super+0x67/0x2c0 fs/super.c:621
kill_anon_super+0x3b/0x70 fs/super.c:1282
v9fs_kill_super+0x4c/0x90 fs/9p/vfs_super.c:195
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa5fc18ff17
RSP: 002b:00007fff888fb7d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fa5fc211c05 RCX: 00007fa5fc18ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff888fb890
RBP: 00007fff888fb890 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff888fc920
R13: 00007fa5fc211c05 R14: 00000000000a89c1 R15: 00007fff888fc960
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3f9/0x770 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: 15643 Comm: syz.5.2319 Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:psi_group_change+0x10a/0x1050 kernel/sched/psi.c:805
Code: ff e8 fa 35 e0 09 85 c0 48 be 00 00 00 00 00 fc ff df 0f 84 97 0a 00 00 49 8d 9e a0 00 00 00 48 89 d8 48 c1 e8 03 80 3c 30 00 <74> 12 48 89 df e8 bc ad 87 00 48 be 00 00 00 00 00 fc ff df 4c 8b
RSP: 0018:ffffc90022dff060 EFLAGS: 00000046
RAX: 1ffff1100ad06614 RBX: ffff8880568330a0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: dffffc0000000000 RDI: ffff888056833000
RBP: 0000000000000010 R08: 000000c63176aa4b R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1005ca381f R12: 0000000000000000
R13: 0000000000000000 R14: ffff888056833000 R15: ffffffff8dbe4d10
FS: 00007f6d05a7b6c0(0000) GS:ffff888125c0f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d05a7af98 CR3: 0000000057db8000 CR4: 00000000003526f0
Call Trace:
psi_task_switch+0x3c6/0x880 kernel/sched/psi.c:987
psi_sched_switch kernel/sched/stats.h:220 [inline]
__schedule+0x22e9/0x4cc0 kernel/sched/core.c:6955
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__scm_recv_common+0x2d3/0x610 net/core/scm.c:506
Code: 8b 4c 24 48 4c 8b 44 24 40 4c 8b 64 24 08 4c 89 e7 be 01 00 00 00 ba 03 00 00 00 e8 27 e7 ff ff 4c 89 ff e8 ff 26 1b fb eb 4a <4c> 8d 7b 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8
RSP: 0018:ffffc90022dff520 EFLAGS: 00000246
RAX: ffffffff896140ee RBX: ffffc90022dff780 RCX: 0000000000000002
RDX: ffff88802682bc00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90022dff5f0 R08: ffffc90022dff79f R09: 0000000000000000
R10: ffffc90022dff780 R11: fffff520045bfef4 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff888030d97b8c R15: 0000000000000000
scm_recv_unix+0xab/0x360 net/core/scm.c:545
__unix_dgram_recvmsg+0x9ec/0xd60 net/unix/af_unix.c:2680
sock_recvmsg_nosec+0x183/0x1c0 net/socket.c:1065
____sys_recvmsg+0x3aa/0x460 net/socket.c:2832
___sys_recvmsg+0x1b5/0x510 net/socket.c:2876
do_recvmmsg+0x307/0x770 net/socket.c:2971
__sys_recvmmsg net/socket.c:3045 [inline]
__do_sys_recvmmsg net/socket.c:3068 [inline]
__se_sys_recvmmsg net/socket.c:3061 [inline]
__x64_sys_recvmmsg+0x190/0x240 net/socket.c:3061
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: 0033:0x7f6d04b8ebe9
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:00007f6d05a7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6d04db6090 RCX: 00007f6d04b8ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f6d04c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d04db6128 R14: 00007f6d04db6090 R15: 00007ffe63005228