INFO: task syz-executor:17672 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23616 pid:17672 tgid:17672 ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 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_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
 nfsd_umount+0x48/0xe0 fs/nfsd/nfsctl.c:1428
 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473
 deactivate_super+0xde/0x100 fs/super.c:506
 cleanup_mnt+0x222/0x450 fs/namespace.c:1373
 task_work_run+0x14e/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f488f987057
RSP: 002b:00007ffecac22ab8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f488f987057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffecac22b70
RBP: 00007ffecac22b70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffecac23bf0
R13: 00007f488fa0180c R14: 00007ffecac23c30 R15: 0000000000000075
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u9:0/55:
 #0: ffff888025407948 ((wq_completion)nbd1-recv){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc9000120fd80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
3 locks held by kworker/1:3/5168:
2 locks held by kworker/u9:2/5829:
 #0: ffff888025569948 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc90003dc7d80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by kworker/u9:4/5836:
 #0: ffff888025580148 ((wq_completion)nbd2-recv){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc90003ef7d80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by kworker/u9:5/5838:
 #0: ffff888025616148 ((wq_completion)nbd3-recv){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc90003f07d80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
1 lock held by syz.7.1955/12904:
6 locks held by kworker/u8:0/16645:
 #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc9000b577d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8faa9790 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xbd0 net/core/net_namespace.c:602
 #3: ffffffff8fabf788 (rtnl_mutex){+.+.}-{4:4}, at: caif_exit_net+0x64/0x3c0 net/caif/caif_dev.c:528
 #4: ffff88806657b080 (&caifn->caifdevs.lock){+.+.}-{4:4}, at: caif_exit_net+0x7b/0x3c0 net/caif/caif_dev.c:529
 #5: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
2 locks held by kworker/u8:13/16708:
2 locks held by syz-executor/17672:
 #0: ffff8880365980e0 (&type->s_umount_key#51){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff8880365980e0 (&type->s_umount_key#51){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff8880365980e0 (&type->s_umount_key#51){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
 #1: ffffffff8e1bae88 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by getty/18550:
 #0: ffff888030dfd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000b2712f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by kworker/u9:1/19176:
 #0: ffff888025586948 ((wq_completion)nbd4-recv){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc90004dafd80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by syz.8.3521/19254:
 #0: ffffffff8fb5e010 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8e1bae88 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz.2.4138/21866:
2 locks held by syz.2.4146/21912:
3 locks held by syz.4.4157/21948:
2 locks held by syz.4.4167/21974:
 #0: ffffffff8faa9790 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x292/0x6c0 net/core/net_namespace.c:512
 #1: ffffffff8ddc6540 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4565
2 locks held by syz.5.4168/21983:
 #0: ffff888024d2d9a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline]
 #0: ffff888024d2d9a0 (&mm->mmap_lock){++++}-{4:4}, at: do_madvise+0x25b/0x770 mm/madvise.c:1671
 #1: ffffffff8deeb888 (lock#3){+.+.}-{4:4}, at: __lru_add_drain_all+0x69/0x6f0 mm/swap.c:798
4 locks held by syz.9.4169/21987:
 #0: ffff888033ab0420 (sb_writers#11){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4073
 #1: ffff888050281f78 (&type->i_mutex_dir_key#7/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
 #1: ffff888050281f78 (&type->i_mutex_dir_key#7/1){+.+.}-{4:4}, at: filename_create+0x1c2/0x530 fs/namei.c:4080
 #2: ffffffff8de15048 (cgroup_mutex){+.+.}-{4:4}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
 #2: ffffffff8de15048 (cgroup_mutex){+.+.}-{4:4}, at: cgroup_kn_lock_live+0x139/0x570 kernel/cgroup/cgroup.c:1662
 #3: ffffffff8fabf788 (rtnl_mutex){+.+.}-{4:4}, at: cgrp_css_online+0xa9/0x200 net/core/netprio_cgroup.c:157

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12904 Comm: syz.7.1955 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:sha256_transform_rorx+0x6e4/0x1120 arch/x86/crypto/sha256-avx2-asm.S:605
Code: 44 89 ce c4 63 7b f0 eb 19 c4 63 7b f0 f3 0b 03 54 3c 4c 44 09 de c5 a5 72 d2 0a 41 89 cf c4 43 7b f0 e1 0d 45 31 f5 45 31 c7 <c5> e5 73 d2 13 c4 63 7b f0 f3 06 41 21 df 01 d0 44 21 d6 c5 ed 73
RSP: 0018:ffffc900042b7200 EFLAGS: 00000282
RAX: 00000000068e50c5 RBX: 000000003b8f10fe RCX: 00000000af978892
RDX: 000000000a40b01c RSI: 00000000bf7ffbef RDI: 0000000000000080
RBP: ffffc900042b7420 R08: 000000003fac8742 R09: 0000000031553b28
R10: 000000005df23158 R11: 000000008f7bc3ef R12: 00000000d9418aa9
R13: 00000000d84f0eff R14: 000000001fc771e2 R15: 00000000903b0fd0
FS:  00007f426c3d66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000001ab000 CR3: 000000005d8ae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_base_do_update include/crypto/sha256_base.h:81 [inline]
 _sha256_update arch/x86/crypto/sha256_ssse3_glue.c:74 [inline]
 _sha256_update+0x17e/0x220 arch/x86/crypto/sha256_ssse3_glue.c:58
 ima_calc_file_hash_tfm+0x302/0x3e0 security/integrity/ima/ima_crypto.c:491
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x8a7/0xa10 security/integrity/ima/ima_api.c:293
 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372
 ima_file_mmap+0x1b3/0x1e0 security/integrity/ima/ima_main.c:462
 security_mmap_file+0x8bd/0x990 security/security.c:2977
 vm_mmap_pgoff+0xdb/0x360 mm/util.c:576
 ksys_mmap_pgoff+0x1c8/0x5c0 mm/mmap.c:542
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 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: 0033:0x7f426b585d29
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:00007f426c3d6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f426b775fa0 RCX: 00007f426b585d29
RDX: 00004000000000df RSI: 0000030000000000 RDI: 0000000000000000
RBP: 00007f426b601a20 R08: 0000000000000401 R09: 0000300000000000
R10: 0400000000040eb4 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f426b775fa0 R15: 00007ffce009daf8
 </TASK>