====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L Y ------------------------------------------------------ syz.6.5861/24165 is trying to acquire lock: ffff88807c1c24c0 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff88807c1c24c0 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: __sock_release+0x7a/0x1f0 net/socket.c:734 but task is already holding lock: ffffffff90d1bbc0 (nvmf_dev_mutex){+.+.}-{4:4}, at: nvmf_dev_write+0x14e/0x2d90 drivers/nvme/host/fabrics.c:1402 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (nvmf_dev_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x197/0x15a0 kernel/locking/mutex.c:821 nvmf_dev_show+0x2c/0x180 drivers/nvme/host/fabrics.c:1446 seq_read_iter+0x463/0xca0 fs/seq_file.c:231 seq_read+0x367/0x480 fs/seq_file.c:163 vfs_read+0x213/0xa80 fs/read_write.c:572 ksys_read+0x150/0x270 fs/read_write.c:716 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&p->lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x197/0x15a0 kernel/locking/mutex.c:821 seq_read_iter+0xa4/0xca0 fs/seq_file.c:183 __kernel_read+0x4ca/0x960 fs/read_write.c:532 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:222 [inline] ima_calc_file_hash+0x451/0x890 security/integrity/ima/ima_crypto.c:280 ima_collect_measurement+0x51b/0xa00 security/integrity/ima/ima_api.c:300 process_measurement+0x1272/0x1c10 security/integrity/ima/ima_main.c:425 ima_file_check+0xdc/0x130 security/integrity/ima/ima_main.c:686 security_file_post_open+0xb3/0x260 security/security.c:2776 do_open fs/namei.c:4847 [inline] path_openat+0x1748/0x20f0 fs/namei.c:5010 do_file_open+0x23e/0x4a0 fs/namei.c:5039 do_sys_openat2+0x115/0x200 fs/open.c:1442 do_sys_open fs/open.c:1448 [inline] __do_sys_openat fs/open.c:1788 [inline] __se_sys_openat fs/open.c:1783 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1783 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x197/0x15a0 kernel/locking/mutex.c:821 process_measurement+0x7d0/0x1c10 security/integrity/ima/ima_main.c:319 ima_file_check+0xdc/0x130 security/integrity/ima/ima_main.c:686 security_file_post_open+0xb3/0x260 security/security.c:2776 do_open fs/namei.c:4847 [inline] path_openat+0x1748/0x20f0 fs/namei.c:5010 do_file_open+0x23e/0x4a0 fs/namei.c:5039 file_open_name fs/open.c:1400 [inline] filp_open+0x16d/0x1d0 fs/open.c:1417 kernel_read_file_from_path_initns+0xde/0x1e0 fs/kernel_read_file.c:159 fw_get_filesystem_firmware drivers/base/firmware_loader/main.c:549 [inline] _request_firmware+0xa2b/0x1750 drivers/base/firmware_loader/main.c:873 request_firmware+0x36/0x50 drivers/base/firmware_loader/main.c:948 reg_reload_regdb+0x94/0x580 net/wireless/reg.c:1075 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2576 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x8ef/0xa80 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x7f0/0xb20 net/netlink/af_netlink.c:1920 sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800 __sock_sendmsg net/socket.c:818 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2715 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2769 __sys_sendmsg net/socket.c:2801 [inline] __do_sys_sendmsg net/socket.c:2806 [inline] __se_sys_sendmsg net/socket.c:2804 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2804 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (cb_lock){++++}-{4:4}: down_read+0x45/0x320 kernel/locking/rwsem.c:1574 genl_release+0x89/0x1e0 net/netlink/genetlink.c:697 netlink_release+0xeaa/0x1a90 net/netlink/af_netlink.c:732 __sock_release+0xa0/0x1f0 net/socket.c:735 sock_close+0x1c/0x30 net/socket.c:1529 __fput+0x408/0xa40 fs/file_table.c:513 fput_close_sync+0x11f/0x240 fs/file_table.c:619 filp_close_sync fs/open.c:1897 [inline] __do_sys_close fs/open.c:2153 [inline] __se_sys_close+0xa2/0x160 fs/open.c:2140 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x91/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] __sock_release+0x7a/0x1f0 net/socket.c:734 sock_close+0x1c/0x30 net/socket.c:1529 __fput+0x408/0xa40 fs/file_table.c:513 nvme_tcp_alloc_queue+0x17ba/0x1e30 drivers/nvme/host/tcp.c:1976 nvme_tcp_alloc_admin_queue drivers/nvme/host/tcp.c:2158 [inline] nvme_tcp_configure_admin_queue+0x23/0x3f0 drivers/nvme/host/tcp.c:2312 nvme_tcp_setup_ctrl+0xba/0x1880 drivers/nvme/host/tcp.c:2442 nvme_tcp_create_ctrl+0x85f/0xc60 drivers/nvme/host/tcp.c:3070 nvmf_create_ctrl drivers/nvme/host/fabrics.c:1361 [inline] nvmf_dev_write+0x24ca/0x2d90 drivers/nvme/host/fabrics.c:1408 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:1036 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &sb->s_type->i_mutex_key#13 --> &p->lock --> nvmf_dev_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(nvmf_dev_mutex); lock(&p->lock); lock(nvmf_dev_mutex); lock(&sb->s_type->i_mutex_key#13); *** DEADLOCK *** locks held by syz.6.5861/24165: 1, last CPU#1: #0: ffffffff90d1bbc0 (nvmf_dev_mutex){+.+.}-{4:4}, at: nvmf_dev_write+0x14e/0x2d90 drivers/nvme/host/fabrics.c:1402 stack backtrace: CPU: 1 UID: 0 PID: 24165 Comm: syz.6.5861 Tainted: G L Y syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP, [Y]=FORCED_BIND Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219 check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x91/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] __sock_release+0x7a/0x1f0 net/socket.c:734 sock_close+0x1c/0x30 net/socket.c:1529 __fput+0x408/0xa40 fs/file_table.c:513 nvme_tcp_alloc_queue+0x17ba/0x1e30 drivers/nvme/host/tcp.c:1976 nvme_tcp_alloc_admin_queue drivers/nvme/host/tcp.c:2158 [inline] nvme_tcp_configure_admin_queue+0x23/0x3f0 drivers/nvme/host/tcp.c:2312 nvme_tcp_setup_ctrl+0xba/0x1880 drivers/nvme/host/tcp.c:2442 nvme_tcp_create_ctrl+0x85f/0xc60 drivers/nvme/host/tcp.c:3070 nvmf_create_ctrl drivers/nvme/host/fabrics.c:1361 [inline] nvmf_dev_write+0x24ca/0x2d90 drivers/nvme/host/fabrics.c:1408 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:1036 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff67099e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff6717cf028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff670c25fa0 RCX: 00007ff67099e559 RDX: 000000000000004b RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007ff670a35ad8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff670c26038 R14: 00007ff670c25fa0 R15: 00007ffc4dcaae88 kernfs runtime_status: removing kernfs control: removing kernfs runtime_suspended_time: removing kernfs runtime_active_time: removing kernfs autosuspend_delay_ms: removing kernfs power: removing kernfs 511:0: removing kernfs dev: removing kernfs device: removing kernfs subsystem: removing kernfs nvme0: removing kernfs uevent: removing kernfs reset_controller: removing kernfs rescan_controller: removing kernfs model: removing kernfs serial: removing kernfs firmware_rev: removing kernfs cntlid: removing kernfs delete_controller: removing kernfs transport: removing kernfs subsysnqn: removing kernfs address: removing kernfs state: removing kernfs numa_node: removing kernfs queue_count: removing kernfs sqsize: removing kernfs hostnqn: removing kernfs hostid: removing kernfs ctrl_loss_tmo: removing kernfs reconnect_delay: removing kernfs fast_io_fail_tmo: removing kernfs kato: removing kernfs cntrltype: removing kernfs dctype: removing kernfs quirks: removing kernfs admin_timeout: removing kernfs io_timeout: removing kernfs passthru_err_log_enabled: removing kernfs command_error_count: removing kernfs reset_count: removing kernfs reconnect_count: removing kernfs diag: removing PM: Removing info for No Bus:nvme0 kobject: 'nvme0' (ffff88802ba106d8): kobject_uevent_env kobject: 'nvme0' (ffff88802ba106d8): fill_kobj_path: path = '/devices/virtual/nvme-fabrics/ctl/nvme0' kernfs nvme0: removing kobject: '(null)' (ffff88802ba10ba8): kobject_cleanup, parent ffff88802ba106d8 kobject: '(null)' (ffff88802ba10ba8): calling ktype release kobject: 'nvme0' (ffff88802ba106d8): kobject_cleanup, parent 0000000000000000 kobject: 'nvme0' (ffff88802ba106d8): calling ktype release kobject: 'nvme0': free name kcov: kcov_task_exit: t = ffff88807a061f40, kcov->t = ffff88807a061f40