syzbot

INFO: task syz.4.859:9789 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.859       state:D stack:27280 pid:9789  tgid:9785  ppid:7223   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 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_threads_get_doit+0x1c7/0x740 fs/nfsd/nfsctl.c:1755
 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:2581
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2635
 __sys_sendmsg+0x16e/0x220 net/socket.c:2667
 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: 0033:0x7fe6df77e819
RSP: 002b:00007fe6e04e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe6df936080 RCX: 00007fe6df77e819
RDX: 0000000020000000 RSI: 0000000020000d80 RDI: 0000000000000003
RBP: 00007fe6df7f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe6df936080 R15: 00007ffc78dd8918
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8ddba680 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8ddba680 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ddba680 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:7/2943:
 #0: ffff888147aad148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc9000c36fd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
2 locks held by kworker/u8:9/3454:
5 locks held by kworker/u8:10/3511:
 #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc9000cfafd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8fab8c10 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580
 #3: ffffffff8face8a8 (rtnl_mutex){+.+.}-{4:4}, at: wg_netns_pre_exit+0x1b/0x230 drivers/net/wireguard/device.c:414
 #4: ffff888082229428 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_netns_pre_exit+0xdd/0x230 drivers/net/wireguard/device.c:419
3 locks held by kworker/1:3/4958:
 #0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc900105ffd80 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8face8a8 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:540
2 locks held by getty/5609:
 #0: ffff8880353320a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:28/7792:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc900036ffd80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8face8a8 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
1 lock held by syz.2.709/9058:
2 locks held by syz.4.859/9787:
 #0: ffffffff8fb6c890 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8e1d8868 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
2 locks held by syz.4.859/9789:
 #0: ffffffff8fb6c890 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8e1d8868 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_threads_get_doit+0x1c7/0x740 fs/nfsd/nfsctl.c:1755
2 locks held by syz.1.899/9942:
 #0: ffffffff8fb6c890 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8e1d8868 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
3 locks held by kworker/0:5/10277:
 #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
 #1: ffffc900034dfd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8ddc5fb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz-executor/10338:
 #0: ffff8880338b00e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff8880338b00e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff8880338b00e0 (&type->s_umount_key#50){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
 #1: ffffffff8e1d8868 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
4 locks held by syz-executor/10725:
 #0: ffff888024a18d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
 #1: ffff888024a18078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1260 net/bluetooth/hci_sync.c:5193
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline]
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592
 #3: ffffffff8ddc5fb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz.7.1041/10988:
 #0: ffffffff8fb6c890 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8e1d8868 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_version_set_doit+0xc5/0x7a0 fs/nfsd/nfsctl.c:1813
3 locks held by syz.3.1119/11444:
 #0: ffff888020f60d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
 #1: ffff888020f60078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1260 net/bluetooth/hci_sync.c:5193
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline]
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592
3 locks held by syz.9.1131/11498:
 #0: ffff888040940d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
 #1: ffff888040940078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1260 net/bluetooth/hci_sync.c:5193
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline]
 #2: ffffffff8fd34308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592
1 lock held by syz-executor/11518:
 #0: ffffffff8face8a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8face8a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by dhcpcd/11546:
 #0: ffff888037c6e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
 #0: ffff888037c6e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
1 lock held by dhcpcd/11547:
 #0: ffff888037c6c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
 #0: ffff888037c6c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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:223 [inline]
 watchdog+0xf0c/0x1240 kernel/hung_task.c:379
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9058 Comm: syz.2.709 Not tainted 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:sha256_transform_rorx+0x7ff/0x1120 arch/x86/crypto/sha256-avx2-asm.S:610
Code: 44 89 c6 c4 43 7b f0 eb 19 c4 43 7b f0 f3 0b 03 4c 3c 64 44 09 ce c5 bd 72 d1 03 41 89 c7 c4 43 7b f0 e0 0d 45 31 f5 41 31 df <c4> 43 7b f0 f3 06 45 31 f5 c4 43 7b f0 f0 16 45 21 df 41 01 ca c5
RSP: 0018:ffffc9000376f200 EFLAGS: 00000202
RAX: 00000000c07a0477 RBX: 00000000b7e3d208 RCX: 00000000b33f7783
RDX: 0000000006a1226e RSI: 00000000337af5f8 RDI: 0000000000000100
RBP: ffffc9000376f420 R08: 00000000215a7528 R09: 00000000327a90d0
R10: 000000001f25c744 R11: 0000000051a727e5 R12: 00000000a9410ad3
R13: 000000002f39c64c R14: 00000000fcaa34e4 R15: 000000007799d67f
FS:  00007fd2c57e06c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005570fe448e18 CR3: 000000002a0fe000 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:2978
 vm_mmap_pgoff+0xdb/0x360 mm/util.c:584
 ksys_mmap_pgoff+0x1c8/0x5c0 mm/mmap.c:542
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79
 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: 0033:0x7fd2c497e819
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:00007fd2c57e0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd2c4b36080 RCX: 00007fd2c497e819
RDX: 00004000000000df RSI: 0000000800000004 RDI: 0000000000000000
RBP: 00007fd2c49f175e R08: 0000000000000401 R09: 0000300000000000
R10: 0000001000040eb1 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd2c4b36080 R15: 00007ffd0d73a698
 </TASK>