======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
iou-wrk-15288/15321 is trying to acquire lock:
ffffffff911854a0 (nvmf_dev_mutex){+.+.}-{4:4}, at: nvmf_dev_show+0x26/0x210 drivers/nvme/host/fabrics.c:1464

but task is already holding lock:
ffff88807aad0e18 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x1270 fs/seq_file.c:183

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&p->lock){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5942 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x19f/0x1c10 kernel/locking/mutex.c:821
       seq_read_iter+0xe1/0x1270 fs/seq_file.c:183
       kernfs_fop_read_iter+0x46c/0x610 fs/kernfs/file.c:290
       __kernel_read+0x397/0xac0 fs/read_write.c:512
       integrity_kernel_read+0x7e/0xb0 security/integrity/iint.c:28
       ima_calc_file_hash_tfm+0x25e/0x350 security/integrity/ima/ima_crypto.c:222
       ima_calc_file_hash+0x1e3/0x380 security/integrity/ima/ima_crypto.c:280
       ima_collect_measurement+0x952/0xb30 security/integrity/ima/ima_api.c:300
       process_measurement+0xe04/0x2360 security/integrity/ima/ima_main.c:425
       ima_file_check+0xbf/0x110 security/integrity/ima/ima_main.c:686
       security_file_post_open+0xc4/0x210 security/security.c:2777
       do_open fs/namei.c:4853 [inline]
       path_openat+0x5d0/0x23f0 fs/namei.c:5016
       do_file_open+0x20e/0x430 fs/namei.c:5045
       do_sys_openat2+0x163/0x1d0 fs/open.c:1443
       do_sys_open fs/open.c:1449 [inline]
       __do_sys_openat fs/open.c:1465 [inline]
       __se_sys_openat fs/open.c:1460 [inline]
       __x64_sys_openat+0x12d/0x210 fs/open.c:1460
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5942 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x19f/0x1c10 kernel/locking/mutex.c:821
       process_measurement+0x5ab/0x2360 security/integrity/ima/ima_main.c:319
       ima_file_check+0xbf/0x110 security/integrity/ima/ima_main.c:686
       security_file_post_open+0xc4/0x210 security/security.c:2777
       do_open fs/namei.c:4853 [inline]
       path_openat+0x5d0/0x23f0 fs/namei.c:5016
       do_file_open+0x20e/0x430 fs/namei.c:5045
       file_open_name+0x1c3/0x3e0 fs/open.c:1401
       filp_open+0x2e/0x50 fs/open.c:1418
       kernel_read_file_from_path_initns+0xec/0x240 fs/kernel_read_file.c:159
       fw_get_filesystem_firmware drivers/base/firmware_loader/main.c:549 [inline]
       _request_firmware+0x6f1/0x1410 drivers/base/firmware_loader/main.c:873
       request_firmware+0x35/0x50 drivers/base/firmware_loader/main.c:948
       reg_reload_regdb+0x87/0x540 net/wireless/reg.c:1078
       genl_family_rcv_msg_doit+0x214/0x300 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x560/0x800 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2584
       genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
       netlink_unicast+0x668/0x950 net/netlink/af_netlink.c:1361
       netlink_sendmsg+0x9ac/0x10c0 net/netlink/af_netlink.c:1920
       sock_sendmsg_nosec net/socket.c:800 [inline]
       __sock_sendmsg net/socket.c:818 [inline]
       ____sys_sendmsg+0xa99/0xc30 net/socket.c:2715
       ___sys_sendmsg+0x190/0x1e0 net/socket.c:2769
       __sys_sendmsg+0x160/0x210 net/socket.c:2801
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (cb_lock){++++}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5942 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
       down_read+0x94/0x4c0 kernel/locking/rwsem.c:1574
       genl_release+0x7e/0x1d0 net/netlink/genetlink.c:697
       netlink_release+0x104e/0x1fc0 net/netlink/af_netlink.c:732
       __sock_release+0xb3/0x260 net/socket.c:735
       sock_close+0x1c/0x30 net/socket.c:1529
       __fput+0x3fb/0xb50 fs/file_table.c:512
       fput_close_sync+0x118/0x250 fs/file_table.c:618
       filp_close_sync+0x75/0xa0 fs/open.c:1574
       __do_sys_close fs/open.c:1597 [inline]
       __se_sys_close fs/open.c:1584 [inline]
       __x64_sys_close+0x81/0x110 fs/open.c:1584
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5942 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
       down_write+0x86/0x1f0 kernel/locking/rwsem.c:1631
       inode_lock include/linux/fs.h:1027 [inline]
       __sock_release+0x86/0x260 net/socket.c:734
       sock_close+0x1c/0x30 net/socket.c:1529
       __fput+0x3fb/0xb50 fs/file_table.c:512
       __fput_sync+0xd7/0x100 fs/file_table.c:605
       nvme_tcp_alloc_queue.isra.0+0xb26/0x1340 drivers/nvme/host/tcp.c:2164
       nvme_tcp_alloc_admin_queue drivers/nvme/host/tcp.c:2326 [inline]
       nvme_tcp_configure_admin_queue+0x26/0x530 drivers/nvme/host/tcp.c:2534
       nvme_tcp_setup_ctrl+0xa4/0xa20 drivers/nvme/host/tcp.c:2664
       nvme_tcp_create_ctrl+0xdb8/0x1430 drivers/nvme/host/tcp.c:3302
       nvmf_create_ctrl drivers/nvme/host/fabrics.c:1379 [inline]
       nvmf_dev_write+0x4ee/0xb60 drivers/nvme/host/fabrics.c:1426
       vfs_write+0x2aa/0x1040 fs/read_write.c:665
       ksys_write+0x12a/0x250 fs/read_write.c:719
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (nvmf_dev_mutex){+.+.}-{4:4}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3209
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x1528/0x1f40 kernel/locking/lockdep.c:5288
       lock_acquire kernel/locking/lockdep.c:5942 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x19f/0x1c10 kernel/locking/mutex.c:821
       nvmf_dev_show+0x26/0x210 drivers/nvme/host/fabrics.c:1464
       seq_read_iter+0x32f/0x1270 fs/seq_file.c:231
       seq_read+0x33b/0x4c0 fs/seq_file.c:163
       loop_rw_iter+0x305/0x6a0 io_uring/rw.c:715
       io_iter_do_read io_uring/rw.c:822 [inline]
       io_iter_do_read io_uring/rw.c:815 [inline]
       __io_read+0x1087/0x1470 io_uring/rw.c:938
       io_read+0x8d/0x230 io_uring/rw.c:1017
       __io_issue_sqe io_uring/io_uring.c:1514 [inline]
       io_issue_sqe+0x15f/0x1c10 io_uring/io_uring.c:1537
       io_wq_submit_work+0x270/0x1120 io_uring/io_uring.c:1677
       io_worker_handle_work+0x69d/0x1750 io_uring/io-wq.c:677
       io_wq_worker+0x35e/0x13b0 io_uring/io-wq.c:768
       ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

other info that might help us debug this:

Chain exists of:
  nvmf_dev_mutex --> &ima_iint_mutex_key[depth] --> &p->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&p->lock);
                               lock(&ima_iint_mutex_key[depth]);
                               lock(&p->lock);
  lock(nvmf_dev_mutex);

 *** DEADLOCK ***

locks held by iou-wrk-15288/15321: 1, on CPU#0:
 #0: ffff88807aad0e18 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x1270 fs/seq_file.c:183

stack backtrace:
CPU: 0 UID: 0 PID: 15321 Comm: iou-wrk-15288 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1be kernel/locking/lockdep.c:2087
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2219
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3209
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x1528/0x1f40 kernel/locking/lockdep.c:5288
 lock_acquire kernel/locking/lockdep.c:5942 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x19f/0x1c10 kernel/locking/mutex.c:821
 nvmf_dev_show+0x26/0x210 drivers/nvme/host/fabrics.c:1464
 seq_read_iter+0x32f/0x1270 fs/seq_file.c:231
 seq_read+0x33b/0x4c0 fs/seq_file.c:163
 loop_rw_iter+0x305/0x6a0 io_uring/rw.c:715
 io_iter_do_read io_uring/rw.c:822 [inline]
 io_iter_do_read io_uring/rw.c:815 [inline]
 __io_read+0x1087/0x1470 io_uring/rw.c:938
 io_read+0x8d/0x230 io_uring/rw.c:1017
 __io_issue_sqe io_uring/io_uring.c:1514 [inline]
 io_issue_sqe+0x15f/0x1c10 io_uring/io_uring.c:1537
 io_wq_submit_work+0x270/0x1120 io_uring/io_uring.c:1677
 io_worker_handle_work+0x69d/0x1750 io_uring/io-wq.c:677
 io_wq_worker+0x35e/0x13b0 io_uring/io-wq.c:768
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>