INFO: task syz.1.3910:22104 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09734-g445d9f05fa14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3910 state:D stack:27056 pid:22104 tgid:22103 ppid:15598 flags:0x00020004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2541
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2583
___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
__sys_sendmsg+0x16e/0x220 net/socket.c:2669
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7480180809
RSP: 002b:00007f7481041058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7480345fa0 RCX: 00007f7480180809
RDX: 0000000000004000 RSI: 00000000200020c0 RDI: 000000000000000b
RBP: 00007f74801f393e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7480345fa0 R15: 00007ffce3aaf2e8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8dfbaf40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8dfbaf40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8dfbaf40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:5/1158:
#0: ffff888144a93148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x126b/0x1b30 kernel/workqueue.c:3204
#1: ffffc90003fafd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by getty/5607:
#0: ffff8880314040a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.0.874/9124:
2 locks held by kworker/u8:23/20340:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x126b/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000439fd80 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by syz-executor/21577:
#0: ffff888062a340e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888062a340e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888062a340e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.1.3910/22104:
#0: ffffffff8fd73250 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
2 locks held by syz.1.3910/22105:
#0: ffffffff8fd73250 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
3 locks held by kworker/u8:27/22183:
2 locks held by syz.3.3975/22591:
#0: ffff88806aacc0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806aacc0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806aacc0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.8.3980/22650:
#0: ffff8880121700e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880121700e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880121700e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/23047:
#0: ffff88804db360e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804db360e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804db360e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/23122:
#0: ffff88802523e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802523e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802523e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/24195:
#0: ffff88803e3600e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88803e3600e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88803e3600e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e3bbc48 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by kworker/u8:47/25205:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x126b/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000453fd80 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by syz.4.4337/25624:
2 locks held by rm/25739:
#0: ffff8880b873ebd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
#1: ffff8880b8728a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09734-g445d9f05fa14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25624 Comm: syz.4.4337 Not tainted 6.12.0-syzkaller-09734-g445d9f05fa14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:task_stack_page include/linux/sched/task_stack.h:23 [inline]
RIP: 0010:check_stack_object+0x33/0xb0 mm/usercopy.c:39
Code: 48 89 f3 65 4c 8b 25 fc b6 04 7e e8 f7 d7 8e ff 49 8d 7c 24 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 6f 4d 8b 64 24 20 48 01 eb 49 39 dc 73 47 e8 c9 d7 8e ff 4d 8d
RSP: 0018:ffffc9000b78faa0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000080 RCX: ffffffff81ff2571
RDX: 1ffff11006284004 RSI: ffffffff81ff2209 RDI: ffff888031420020
RBP: ffffc9000b78fc68 R08: 0000000000000007 R09: 0000000000000010
R10: ffffc9000b78fc68 R11: 0000000000000000 R12: ffff888031420000
R13: ffffc9000b78fce8 R14: ffffc9000b78fce7 R15: ffff888031420000
FS: 00007f74fddd26c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001e1d000 CR3: 000000003b522000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__check_object_size mm/usercopy.c:226 [inline]
__check_object_size+0x9b/0x710 mm/usercopy.c:213
check_object_size include/linux/thread_info.h:228 [inline]
check_copy_size include/linux/thread_info.h:264 [inline]
copy_from_user include/linux/uaccess.h:207 [inline]
do_pages_stat+0x1d1/0x800 mm/migrate.c:2472
kernel_move_pages+0x107d/0x1560 mm/migrate.c:2558
__do_sys_move_pages mm/migrate.c:2569 [inline]
__se_sys_move_pages mm/migrate.c:2564 [inline]
__x64_sys_move_pages+0xe0/0x1c0 mm/migrate.c:2564
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f74fcf80809
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:00007f74fddd2058 EFLAGS: 00000246 ORIG_RAX: 0000000000000117
RAX: ffffffffffffffda RBX: 00007f74fd146240 RCX: 00007f74fcf80809
RDX: 0000000000000000 RSI: 0002000000000003 RDI: 0000000000000001
RBP: 00007f74fcff393e R08: 0000000000000000 R09: 8000400000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f74fd146240 R15: 00007ffe7a83b0a8