program: mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./config\x00', 0x1ff) mount(0x0, &(0x7f00000000c0)='./config\x00', &(0x7f0000000180)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/target\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000240)='./config/target/core\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/target/core/rd_mcp_0\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/target/core/rd_mcp_0/rd1\x00', 0x1ff) r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./config/target/core/rd_mcp_0/rd1/control\x00', 0x2, 0x0) write(r0, &(0x7f0000000380)='rd_pages=32768\x00', 0xe) r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='./config/target/core/rd_mcp_0/rd1/enable\x00', 0x2, 0x0) write(r1, &(0x7f0000000400)='1\x00', 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1\x00', 0x1ff) r2 = openat(0xffffffffffffff9c, &(0x7f00000004c0)='./config/usb_gadget/g1/idVendor\x00', 0x2, 0x0) write(r2, &(0x7f0000000500)='0x1d6b\x00', 0x6) r3 = openat(0xffffffffffffff9c, &(0x7f0000000540)='./config/usb_gadget/g1/idProduct\x00', 0x2, 0x0) write(r3, &(0x7f0000000580)='0x0104\x00', 0x6) mkdirat(0xffffffffffffff9c, &(0x7f00000005c0)='./config/usb_gadget/g1/functions\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000600)='./config/usb_gadget/g1/functions/tcm.0\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000640)='./config/usb_gadget/g1/configs\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000680)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./config/target/usb_gadget\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000700)='./config/target/usb_gadget/naa.6001405123456789\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000740)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000780)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/lun\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f00000007c0)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/lun/lun_0\x00', 0x1ff) symlinkat(&(0x7f0000000840)='./config/target/core/rd_mcp_0/rd1\x00', 0xffffffffffffff9c, &(0x7f0000000880)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/lun/lun_0/rd1\x00') r4 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/nexus\x00', 0x2, 0x0) write(r4, &(0x7f0000000940)='naa.6001405123456789\x00', 0x14) symlinkat(&(0x7f0000000980)='./config/usb_gadget/g1/functions/tcm.0\x00', 0xffffffffffffff9c, &(0x7f00000009c0)='./config/usb_gadget/g1/configs/c.1/tcm.0\x00') r5 = openat(0xffffffffffffff9c, &(0x7f0000000a00)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/enable\x00', 0x2, 0x0) write(r5, &(0x7f0000000a40)='1\x00', 0x1) r6 = openat(0xffffffffffffff9c, &(0x7f0000000a80)='./config/usb_gadget/g1/UDC\x00', 0x2, 0x0) write(r6, &(0x7f0000000ac0)='dummy_udc.0\x00', 0xb) nanosleep(&(0x7f0000000000)={0x1}, 0x0) r7 = syz_open_dev$sg(0x0, 0x0, 0x0) ioctl$SG_IO(r7, 0x2285, &(0x7f0000000100)={0x53, 0xfffffffe, 0xa, 0x0, @buffer={0x0, 0x1c, &(0x7f0000000200)=""/28}, &(0x7f0000000300)="5f000000000000001c00", &(0x7f0000000400), 0x0, 0x0, 0x0, 0x0}) [ 75.986444][ T44] Bluetooth: hci0: command tx timeout [ 76.073356][ T24] audit: type=1800 audit(1785849675.187:2): pid=5323 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="enable" dev="configfs" ino=4217 res=0 errno=0 [ 76.089236][ T24] audit: type=1800 audit(1785849675.197:3): pid=5323 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="idVendor" dev="configfs" ino=4224 res=0 errno=0 [ 76.101706][ T5323] se_device not configured yet, cannot port link [ 76.104102][ T24] audit: type=1800 audit(1785849675.197:4): pid=5323 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="idProduct" dev="configfs" ino=4225 res=0 errno=0 [ 76.115767][ T5323] [ 76.116787][ T5323] ====================================================== [ 76.119689][ T5323] WARNING: possible circular locking dependency detected [ 76.122635][ T5323] syzkaller #0 Not tainted [ 76.124374][ T5323] ------------------------------------------------------ [ 76.126985][ T5323] syz.0.0/5323 is trying to acquire lock: [ 76.129434][ T5323] ffffffff8fa50d80 (tpg_instances_lock){+.+.}-{4:4}, at: tcm_alloc+0x21/0x2e0 [ 76.133264][ T5323] [ 76.133264][ T5323] but task is already holding lock: [ 76.136454][ T5323] ffff888012dac390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.140326][ T5323] [ 76.140326][ T5323] which lock already depends on the new lock. [ 76.140326][ T5323] [ 76.144733][ T5323] [ 76.144733][ T5323] the existing dependency chain (in reverse order) is: [ 76.148548][ T5323] [ 76.148548][ T5323] -> #3 (&gi->lock){+.+.}-{4:4}: [ 76.151537][ T5323] __mutex_lock+0x19d/0x1550 [ 76.153812][ T5323] config_usb_cfg_link+0x59/0x260 [ 76.156168][ T5323] configfs_symlink+0x59a/0x1030 [ 76.158521][ T5323] vfs_symlink+0x18b/0x330 [ 76.160685][ T5323] filename_symlinkat+0x1cd/0x410 [ 76.163051][ T5323] __se_sys_symlinkat+0x4e/0x2b0 [ 76.165420][ T5323] do_syscall_64+0x174/0x580 [ 76.167622][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.170413][ T5323] [ 76.170413][ T5323] -> #2 (&sb->s_type->i_mutex_key#24){++++}-{4:4}: [ 76.174145][ T5323] down_write+0x96/0x200 [ 76.176193][ T5323] configfs_depend_item_unlocked+0x153/0x420 [ 76.178884][ T5323] usbg_make_tpg+0x1f6/0x590 [ 76.181052][ T5323] target_fabric_make_tpg+0xa8/0x6d0 [ 76.183625][ T5323] configfs_mkdir+0x4f6/0x9e0 [ 76.185906][ T5323] vfs_mkdir+0x406/0x620 [ 76.187971][ T5323] filename_mkdirat+0x285/0x510 [ 76.190107][ T5323] __se_sys_mkdirat+0x35/0x150 [ 76.192219][ T5323] do_syscall_64+0x174/0x580 [ 76.194230][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.196787][ T5323] [ 76.196787][ T5323] -> #1 (&opts->dep_lock){+.+.}-{4:4}: [ 76.200027][ T5323] __mutex_lock+0x19d/0x1550 [ 76.202258][ T5323] usbg_make_tpg+0x147/0x590 [ 76.204503][ T5323] target_fabric_make_tpg+0xa8/0x6d0 [ 76.206977][ T5323] configfs_mkdir+0x4f6/0x9e0 [ 76.209203][ T5323] vfs_mkdir+0x406/0x620 [ 76.211248][ T5323] filename_mkdirat+0x285/0x510 [ 76.213624][ T5323] __se_sys_mkdirat+0x35/0x150 [ 76.215903][ T5323] do_syscall_64+0x174/0x580 [ 76.218099][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.220813][ T5323] [ 76.220813][ T5323] -> #0 (tpg_instances_lock){+.+.}-{4:4}: [ 76.224188][ T5323] __lock_acquire+0x1520/0x2cf0 [ 76.226497][ T5323] lock_acquire+0x106/0x350 [ 76.228662][ T5323] __mutex_lock+0x19d/0x1550 [ 76.230851][ T5323] tcm_alloc+0x21/0x2e0 [ 76.232964][ T5323] usb_get_function+0x63/0xb0 [ 76.235287][ T5323] config_usb_cfg_link+0x148/0x260 [ 76.237706][ T5323] configfs_symlink+0x59a/0x1030 [ 76.240077][ T5323] vfs_symlink+0x18b/0x330 [ 76.242316][ T5323] filename_symlinkat+0x1cd/0x410 [ 76.244728][ T5323] __se_sys_symlinkat+0x4e/0x2b0 [ 76.247097][ T5323] do_syscall_64+0x174/0x580 [ 76.249353][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.252155][ T5323] [ 76.252155][ T5323] other info that might help us debug this: [ 76.252155][ T5323] [ 76.256521][ T5323] Chain exists of: [ 76.256521][ T5323] tpg_instances_lock --> &sb->s_type->i_mutex_key#24 --> &gi->lock [ 76.256521][ T5323] [ 76.262374][ T5323] Possible unsafe locking scenario: [ 76.262374][ T5323] [ 76.265513][ T5323] CPU0 CPU1 [ 76.267724][ T5323] ---- ---- [ 76.270048][ T5323] lock(&gi->lock); [ 76.271752][ T5323] lock(&sb->s_type->i_mutex_key#24); [ 76.275166][ T5323] lock(&gi->lock); [ 76.277967][ T5323] lock(tpg_instances_lock); [ 76.279980][ T5323] [ 76.279980][ T5323] *** DEADLOCK *** [ 76.279980][ T5323] [ 76.283467][ T5323] 3 locks held by syz.0.0/5323: [ 76.285567][ T5323] #0: ffff888000e66450 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 76.289445][ T5323] #1: ffff88801335c600 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: configfs_symlink+0x3af/0x1030 [ 76.294054][ T5323] #2: ffff888012dac390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.297998][ T5323] [ 76.297998][ T5323] stack backtrace: [ 76.300550][ T5323] CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 76.300565][ T5323] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 76.300573][ T5323] Call Trace: [ 76.300579][ T5323] [ 76.300585][ T5323] dump_stack_lvl+0xe8/0x150 [ 76.300607][ T5323] print_circular_bug+0x2e1/0x300 [ 76.300621][ T5323] check_noncircular+0x12e/0x150 [ 76.300634][ T5323] __lock_acquire+0x1520/0x2cf0 [ 76.300653][ T5323] ? __lock_acquire+0x13e8/0x2cf0 [ 76.300669][ T5323] ? __pfx_stack_trace_save+0x10/0x10 [ 76.300685][ T5323] ? tcm_alloc+0x21/0x2e0 [ 76.300697][ T5323] lock_acquire+0x106/0x350 [ 76.300711][ T5323] ? tcm_alloc+0x21/0x2e0 [ 76.300727][ T5323] __mutex_lock+0x19d/0x1550 [ 76.300741][ T5323] ? tcm_alloc+0x21/0x2e0 [ 76.300753][ T5323] ? trace_contention_end+0x3d/0x140 [ 76.300765][ T5323] ? __mutex_lock+0x30d/0x1550 [ 76.300777][ T5323] ? tcm_alloc+0x21/0x2e0 [ 76.300789][ T5323] ? __pfx___mutex_lock+0x10/0x10 [ 76.300804][ T5323] ? __pfx___mutex_lock+0x10/0x10 [ 76.300819][ T5323] tcm_alloc+0x21/0x2e0 [ 76.300832][ T5323] usb_get_function+0x63/0xb0 [ 76.300844][ T5323] config_usb_cfg_link+0x148/0x260 [ 76.300858][ T5323] configfs_symlink+0x59a/0x1030 [ 76.300870][ T5323] ? lookup_one_qstr_excl+0x1d4/0x360 [ 76.300885][ T5323] ? make_vfsuid+0x49/0xa0 [ 76.300897][ T5323] ? __pfx_configfs_symlink+0x10/0x10 [ 76.300909][ T5323] ? bpf_lsm_inode_symlink+0x9/0x20 [ 76.300928][ T5323] vfs_symlink+0x18b/0x330 [ 76.300938][ T5323] ? security_path_symlink+0xfd/0x360 [ 76.300953][ T5323] filename_symlinkat+0x1cd/0x410 [ 76.300965][ T5323] ? __pfx_filename_symlinkat+0x10/0x10 [ 76.300976][ T5323] ? do_getname+0x151/0x250 [ 76.300989][ T5323] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.301000][ T5323] __se_sys_symlinkat+0x4e/0x2b0 [ 76.301011][ T5323] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.301022][ T5323] do_syscall_64+0x174/0x580 [ 76.301037][ T5323] ? trace_irq_disable+0x3b/0x140 [ 76.301051][ T5323] ? clear_bhb_loop+0x40/0x90 [ 76.301062][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.301074][ T5323] RIP: 0033:0x7fac4899e019 [ 76.301085][ T5323] 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 [ 76.301094][ T5323] RSP: 002b:00007fac4990efe8 EFLAGS: 00000246 ORIG_RAX: 000000000000010a [ 76.301107][ T5323] RAX: ffffffffffffffda RBX: 00007fac48c25fa0 RCX: 00007fac4899e019 [ 76.301115][ T5323] RDX: 00002000000009c0 RSI: ffffffffffffff9c RDI: 0000200000000980 [ 76.301123][ T5323] RBP: 00007fac48a3500c R08: 0000000000000000 R09: 0000000000000000 [ 76.301130][ T5323] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 76.301137][ T5323] R13: 00007fac48c26038 R14: 00007fac48c25fa0 R15: 00007ffd3850d8b8 [ 76.301149][ T5323] [ 76.416513][ T24] audit: type=1800 audit(1785849675.227:5): pid=5323 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="nexus" dev="configfs" ino=4246 res=0 errno=0 [ 76.432385][ T1333] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.435304][ T1333] ieee802154 phy1 wpan1: encryption failed: -22 [ 76.444320][ T24] audit: type=1800 audit(1785849675.557:6): pid=5324 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="enable" dev="configfs" ino=4247 res=0 errno=0 [ 76.453286][ T24] audit: type=1800 audit(1785849675.567:7): pid=5324 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="UDC" dev="configfs" ino=4248 res=0 errno=0 [ 76.696217][ T5321] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 76.847145][ T5321] usb 5-1: Dual-Role OTG device on HNP port [ 76.849978][ T5321] usb 5-1: New USB device found, idVendor=1d6b, idProduct=0104, bcdDevice= 7.02 [ 76.853703][ T5321] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 76.862562][ T5310] Using the BOT protocol [ 76.874670][ T5310] Using the UAS protocol [ 76.896793][ T5321] scsi host6: uas