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) r5 = openat(0xffffffffffffff9c, &(0x7f0000000980)='./config/target/usb_gadget/naa.6001405123456789/tpgt_1/enable\x00', 0x2, 0x0) write(r5, &(0x7f00000009c0)='1\x00', 0x1) symlinkat(&(0x7f0000000a00)='./config/usb_gadget/g1/functions/tcm.0\x00', 0xffffffffffffff9c, &(0x7f0000000a40)='./config/usb_gadget/g1/configs/c.1/tcm.0\x00') 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$sg(&(0x7f0000000b00), 0x0, 0x0) ioctl$SG_IO(r7, 0x2285, &(0x7f0000000100)={0x53, 0xfffffffe, 0xa, 0x0, @buffer={0x0, 0x1c, &(0x7f0000000200)=""/28}, &(0x7f0000000300)="5f000000000000001c00", &(0x7f0000000400), 0x0, 0x0, 0x0, 0x0}) [ 76.435987][ T1330] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.438629][ T1330] ieee802154 phy1 wpan1: encryption failed: -22 [ 76.527264][ T24] audit: type=1800 audit(1785849787.877:2): pid=5321 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 [ 76.547040][ T24] audit: type=1800 audit(1785849787.887:3): pid=5321 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 [ 76.560129][ T5321] se_device not configured yet, cannot port link [ 76.563568][ T24] audit: type=1800 audit(1785849787.897:4): pid=5321 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 [ 76.573258][ T5321] [ 76.574187][ T5321] ====================================================== [ 76.576692][ T5321] WARNING: possible circular locking dependency detected [ 76.579275][ T5321] syzkaller #0 Not tainted [ 76.580950][ T5321] ------------------------------------------------------ [ 76.583502][ T5321] syz.0.0/5321 is trying to acquire lock: [ 76.585571][ T5321] ffffffff8fa50d80 (tpg_instances_lock){+.+.}-{4:4}, at: tcm_alloc+0x21/0x2e0 [ 76.588826][ T5321] [ 76.588826][ T5321] but task is already holding lock: [ 76.591295][ T5321] ffff88801f806390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.594125][ T5321] [ 76.594125][ T5321] which lock already depends on the new lock. [ 76.594125][ T5321] [ 76.597515][ T5321] [ 76.597515][ T5321] the existing dependency chain (in reverse order) is: [ 76.601109][ T5321] [ 76.601109][ T5321] -> #3 (&gi->lock){+.+.}-{4:4}: [ 76.603609][ T5321] __mutex_lock+0x19d/0x1550 [ 76.605341][ T5321] config_usb_cfg_link+0x59/0x260 [ 76.607241][ T5321] configfs_symlink+0x59a/0x1030 [ 76.609157][ T5321] vfs_symlink+0x18b/0x330 [ 76.610936][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.612772][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.614578][ T5321] do_syscall_64+0x174/0x580 [ 76.616487][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.618656][ T5321] [ 76.618656][ T5321] -> #2 (&sb->s_type->i_mutex_key#24){++++}-{4:4}: [ 76.621866][ T5321] down_write+0x96/0x200 [ 76.623568][ T5321] configfs_depend_item_unlocked+0x153/0x420 [ 76.625808][ T5321] usbg_make_tpg+0x1f6/0x590 [ 76.627531][ T5321] target_fabric_make_tpg+0xa8/0x6d0 [ 76.629544][ T5321] configfs_mkdir+0x4f6/0x9e0 [ 76.631370][ T5321] vfs_mkdir+0x406/0x620 [ 76.632943][ T5321] filename_mkdirat+0x285/0x510 [ 76.634793][ T5321] __se_sys_mkdirat+0x35/0x150 [ 76.636598][ T5321] do_syscall_64+0x174/0x580 [ 76.638473][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.640746][ T5321] [ 76.640746][ T5321] -> #1 (&opts->dep_lock){+.+.}-{4:4}: [ 76.643265][ T5321] __mutex_lock+0x19d/0x1550 [ 76.644987][ T5321] usbg_make_tpg+0x147/0x590 [ 76.646788][ T5321] target_fabric_make_tpg+0xa8/0x6d0 [ 76.648787][ T5321] configfs_mkdir+0x4f6/0x9e0 [ 76.650722][ T5321] vfs_mkdir+0x406/0x620 [ 76.652401][ T5321] filename_mkdirat+0x285/0x510 [ 76.654234][ T5321] __se_sys_mkdirat+0x35/0x150 [ 76.656068][ T5321] do_syscall_64+0x174/0x580 [ 76.657807][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.660070][ T5321] [ 76.660070][ T5321] -> #0 (tpg_instances_lock){+.+.}-{4:4}: [ 76.662766][ T5321] __lock_acquire+0x1520/0x2cf0 [ 76.664570][ T5321] lock_acquire+0x106/0x350 [ 76.666347][ T5321] __mutex_lock+0x19d/0x1550 [ 76.668074][ T5321] tcm_alloc+0x21/0x2e0 [ 76.669714][ T5321] usb_get_function+0x63/0xb0 [ 76.671429][ T5321] config_usb_cfg_link+0x148/0x260 [ 76.673393][ T5321] configfs_symlink+0x59a/0x1030 [ 76.675252][ T5321] vfs_symlink+0x18b/0x330 [ 76.677056][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.679089][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.680911][ T5321] do_syscall_64+0x174/0x580 [ 76.682643][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.684744][ T5321] [ 76.684744][ T5321] other info that might help us debug this: [ 76.684744][ T5321] [ 76.688159][ T5321] Chain exists of: [ 76.688159][ T5321] tpg_instances_lock --> &sb->s_type->i_mutex_key#24 --> &gi->lock [ 76.688159][ T5321] [ 76.692764][ T5321] Possible unsafe locking scenario: [ 76.692764][ T5321] [ 76.695173][ T5321] CPU0 CPU1 [ 76.696971][ T5321] ---- ---- [ 76.698739][ T5321] lock(&gi->lock); [ 76.700167][ T5321] lock(&sb->s_type->i_mutex_key#24); [ 76.702758][ T5321] lock(&gi->lock); [ 76.704830][ T5321] lock(tpg_instances_lock); [ 76.706464][ T5321] [ 76.706464][ T5321] *** DEADLOCK *** [ 76.706464][ T5321] [ 76.709146][ T5321] 3 locks held by syz.0.0/5321: [ 76.710841][ T5321] #0: ffff888000e16450 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 76.713770][ T5321] #1: ffff88801329ddc0 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: configfs_symlink+0x3af/0x1030 [ 76.717454][ T5321] #2: ffff88801f806390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.720511][ T5321] [ 76.720511][ T5321] stack backtrace: [ 76.722469][ T5321] CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 76.722482][ T5321] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 76.722488][ T5321] Call Trace: [ 76.722492][ T5321] [ 76.722496][ T5321] dump_stack_lvl+0xe8/0x150 [ 76.722510][ T5321] print_circular_bug+0x2e1/0x300 [ 76.722519][ T5321] check_noncircular+0x12e/0x150 [ 76.722528][ T5321] __lock_acquire+0x1520/0x2cf0 [ 76.722539][ T5321] ? __lock_acquire+0x13e8/0x2cf0 [ 76.722550][ T5321] ? __pfx_stack_trace_save+0x10/0x10 [ 76.722561][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.722572][ T5321] lock_acquire+0x106/0x350 [ 76.722585][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.722595][ T5321] __mutex_lock+0x19d/0x1550 [ 76.722604][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.722612][ T5321] ? trace_contention_end+0x3d/0x140 [ 76.722620][ T5321] ? __mutex_lock+0x30d/0x1550 [ 76.722637][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.722650][ T5321] ? __pfx___mutex_lock+0x10/0x10 [ 76.722664][ T5321] ? __pfx___mutex_lock+0x10/0x10 [ 76.722676][ T5321] tcm_alloc+0x21/0x2e0 [ 76.722686][ T5321] usb_get_function+0x63/0xb0 [ 76.722694][ T5321] config_usb_cfg_link+0x148/0x260 [ 76.722705][ T5321] configfs_symlink+0x59a/0x1030 [ 76.722713][ T5321] ? lookup_one_qstr_excl+0x1d4/0x360 [ 76.722723][ T5321] ? make_vfsuid+0x49/0xa0 [ 76.722731][ T5321] ? __pfx_configfs_symlink+0x10/0x10 [ 76.722737][ T5321] ? bpf_lsm_inode_symlink+0x9/0x20 [ 76.722750][ T5321] vfs_symlink+0x18b/0x330 [ 76.722761][ T5321] ? security_path_symlink+0xfd/0x360 [ 76.722774][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.722786][ T5321] ? __pfx_filename_symlinkat+0x10/0x10 [ 76.722798][ T5321] ? do_getname+0x151/0x250 [ 76.722811][ T5321] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.722823][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.722835][ T5321] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.722847][ T5321] do_syscall_64+0x174/0x580 [ 76.722862][ T5321] ? trace_irq_disable+0x3b/0x140 [ 76.722876][ T5321] ? clear_bhb_loop+0x40/0x90 [ 76.722889][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.722901][ T5321] RIP: 0033:0x7f8480f9e019 [ 76.722913][ T5321] 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 [ 76.722922][ T5321] RSP: 002b:00007f8481e18fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000010a [ 76.722935][ T5321] RAX: ffffffffffffffda RBX: 00007f8481225fa0 RCX: 00007f8480f9e019 [ 76.722944][ T5321] RDX: 0000200000000a40 RSI: ffffffffffffff9c RDI: 0000200000000a00 [ 76.722952][ T5321] RBP: 00007f848103500c R08: 0000000000000000 R09: 0000000000000000 [ 76.722959][ T5321] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 76.722966][ T5321] R13: 00007f8481226038 R14: 00007f8481225fa0 R15: 00007ffc5d9268c8 [ 76.722978][ T5321] [ 76.821338][ T24] audit: type=1800 audit(1785849787.917:5): pid=5321 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 [ 76.828757][ T24] audit: type=1800 audit(1785849787.917:6): pid=5321 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 [ 76.842646][ T24] audit: type=1800 audit(1785849788.197:7): pid=5322 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 [ 77.052419][ T5285] Bluetooth: hci0: command tx timeout [ 77.082341][ T1369] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 77.233385][ T1369] usb 5-1: Dual-Role OTG device on HNP port [ 77.236257][ T1369] usb 5-1: New USB device found, idVendor=1d6b, idProduct=0104, bcdDevice= 7.02 [ 77.240747][ T1369] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 77.248797][ T5319] Using the BOT protocol [ 77.257273][ T10] Using the UAS protocol [ 77.280685][ T1369] scsi host6: uas