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}) [ 76.248672][ T5285] Bluetooth: hci0: command tx timeout [ 76.252536][ T1332] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.254693][ T1332] ieee802154 phy1 wpan1: encryption failed: -22 [ 76.304255][ T24] audit: type=1800 audit(1785849674.702:2): pid=5321 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="enable" dev="configfs" ino=4219 res=0 errno=0 [ 76.320693][ T24] audit: type=1800 audit(1785849674.722:3): pid=5321 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="idVendor" dev="configfs" ino=4226 res=0 errno=0 [ 76.335112][ T24] audit: type=1800 audit(1785849674.732:4): pid=5321 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="idProduct" dev="configfs" ino=4227 res=0 errno=0 [ 76.345568][ T5321] se_device not configured yet, cannot port link [ 76.350428][ T24] audit: type=1800 audit(1785849674.752:5): pid=5321 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="nexus" dev="configfs" ino=4248 res=0 errno=0 [ 76.357914][ T5321] [ 76.358779][ T5321] ====================================================== [ 76.361104][ T5321] WARNING: possible circular locking dependency detected [ 76.363453][ T5321] syzkaller #0 Not tainted [ 76.364990][ T5321] ------------------------------------------------------ [ 76.367273][ T5321] syz.0.0/5321 is trying to acquire lock: [ 76.369199][ T5321] ffffffff8fa50d80 (tpg_instances_lock){+.+.}-{4:4}, at: tcm_alloc+0x21/0x2e0 [ 76.372216][ T5321] [ 76.372216][ T5321] but task is already holding lock: [ 76.374688][ T5321] ffff88803756a390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.377655][ T5321] [ 76.377655][ T5321] which lock already depends on the new lock. [ 76.377655][ T5321] [ 76.381103][ T5321] [ 76.381103][ T5321] the existing dependency chain (in reverse order) is: [ 76.384090][ T5321] [ 76.384090][ T5321] -> #3 (&gi->lock){+.+.}-{4:4}: [ 76.386507][ T5321] __mutex_lock+0x19d/0x1550 [ 76.388263][ T5321] config_usb_cfg_link+0x59/0x260 [ 76.390144][ T5321] configfs_symlink+0x59a/0x1030 [ 76.392037][ T5321] vfs_symlink+0x18b/0x330 [ 76.393720][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.395675][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.397585][ T5321] do_syscall_64+0x174/0x580 [ 76.399515][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.401833][ T5321] [ 76.401833][ T5321] -> #2 (&sb->s_type->i_mutex_key#24){++++}-{4:4}: [ 76.405043][ T5321] down_write+0x96/0x200 [ 76.406816][ T5321] configfs_depend_item_unlocked+0x153/0x420 [ 76.409109][ T5321] usbg_make_tpg+0x1f6/0x590 [ 76.411021][ T5321] target_fabric_make_tpg+0xa8/0x6d0 [ 76.413251][ T5321] configfs_mkdir+0x4f6/0x9e0 [ 76.415050][ T5321] vfs_mkdir+0x406/0x620 [ 76.416821][ T5321] filename_mkdirat+0x285/0x510 [ 76.418565][ T5321] __se_sys_mkdirat+0x35/0x150 [ 76.420390][ T5321] do_syscall_64+0x174/0x580 [ 76.422098][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.424104][ T5321] [ 76.424104][ T5321] -> #1 (&opts->dep_lock){+.+.}-{4:4}: [ 76.426504][ T5321] __mutex_lock+0x19d/0x1550 [ 76.428167][ T5321] usbg_make_tpg+0x147/0x590 [ 76.429810][ T5321] target_fabric_make_tpg+0xa8/0x6d0 [ 76.431673][ T5321] configfs_mkdir+0x4f6/0x9e0 [ 76.433369][ T5321] vfs_mkdir+0x406/0x620 [ 76.434963][ T5321] filename_mkdirat+0x285/0x510 [ 76.436889][ T5321] __se_sys_mkdirat+0x35/0x150 [ 76.438687][ T5321] do_syscall_64+0x174/0x580 [ 76.440596][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.443235][ T5321] [ 76.443235][ T5321] -> #0 (tpg_instances_lock){+.+.}-{4:4}: [ 76.446566][ T5321] __lock_acquire+0x1520/0x2cf0 [ 76.448891][ T5321] lock_acquire+0x106/0x350 [ 76.451063][ T5321] __mutex_lock+0x19d/0x1550 [ 76.453188][ T5321] tcm_alloc+0x21/0x2e0 [ 76.455123][ T5321] usb_get_function+0x63/0xb0 [ 76.457267][ T5321] config_usb_cfg_link+0x148/0x260 [ 76.459585][ T5321] configfs_symlink+0x59a/0x1030 [ 76.461817][ T5321] vfs_symlink+0x18b/0x330 [ 76.463879][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.466112][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.468092][ T5321] do_syscall_64+0x174/0x580 [ 76.469882][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.472155][ T5321] [ 76.472155][ T5321] other info that might help us debug this: [ 76.472155][ T5321] [ 76.476291][ T5321] Chain exists of: [ 76.476291][ T5321] tpg_instances_lock --> &sb->s_type->i_mutex_key#24 --> &gi->lock [ 76.476291][ T5321] [ 76.481880][ T5321] Possible unsafe locking scenario: [ 76.481880][ T5321] [ 76.484934][ T5321] CPU0 CPU1 [ 76.487171][ T5321] ---- ---- [ 76.489375][ T5321] lock(&gi->lock); [ 76.491024][ T5321] lock(&sb->s_type->i_mutex_key#24); [ 76.494316][ T5321] lock(&gi->lock); [ 76.496955][ T5321] lock(tpg_instances_lock); [ 76.498895][ T5321] [ 76.498895][ T5321] *** DEADLOCK *** [ 76.498895][ T5321] [ 76.502193][ T5321] 3 locks held by syz.0.0/5321: [ 76.504213][ T5321] #0: ffff888000230450 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 76.507916][ T5321] #1: ffff88801f9270c0 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: configfs_symlink+0x3af/0x1030 [ 76.512268][ T5321] #2: ffff88803756a390 (&gi->lock){+.+.}-{4:4}, at: config_usb_cfg_link+0x59/0x260 [ 76.516103][ T5321] [ 76.516103][ T5321] stack backtrace: [ 76.518518][ T5321] CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 76.518534][ T5321] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 76.518541][ T5321] Call Trace: [ 76.518548][ T5321] [ 76.518554][ T5321] dump_stack_lvl+0xe8/0x150 [ 76.518573][ T5321] print_circular_bug+0x2e1/0x300 [ 76.518587][ T5321] check_noncircular+0x12e/0x150 [ 76.518600][ T5321] __lock_acquire+0x1520/0x2cf0 [ 76.518617][ T5321] ? __lock_acquire+0x13e8/0x2cf0 [ 76.518633][ T5321] ? __pfx_stack_trace_save+0x10/0x10 [ 76.518648][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.518661][ T5321] lock_acquire+0x106/0x350 [ 76.518675][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.518690][ T5321] __mutex_lock+0x19d/0x1550 [ 76.518705][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.518718][ T5321] ? trace_contention_end+0x3d/0x140 [ 76.518730][ T5321] ? __mutex_lock+0x30d/0x1550 [ 76.518744][ T5321] ? tcm_alloc+0x21/0x2e0 [ 76.518756][ T5321] ? __pfx___mutex_lock+0x10/0x10 [ 76.518770][ T5321] ? __pfx___mutex_lock+0x10/0x10 [ 76.518785][ T5321] tcm_alloc+0x21/0x2e0 [ 76.518797][ T5321] usb_get_function+0x63/0xb0 [ 76.518809][ T5321] config_usb_cfg_link+0x148/0x260 [ 76.518823][ T5321] configfs_symlink+0x59a/0x1030 [ 76.518835][ T5321] ? lookup_one_qstr_excl+0x1d4/0x360 [ 76.518851][ T5321] ? make_vfsuid+0x49/0xa0 [ 76.518862][ T5321] ? __pfx_configfs_symlink+0x10/0x10 [ 76.518874][ T5321] ? bpf_lsm_inode_symlink+0x9/0x20 [ 76.518891][ T5321] vfs_symlink+0x18b/0x330 [ 76.518901][ T5321] ? security_path_symlink+0xfd/0x360 [ 76.518913][ T5321] filename_symlinkat+0x1cd/0x410 [ 76.518925][ T5321] ? __pfx_filename_symlinkat+0x10/0x10 [ 76.518937][ T5321] ? do_getname+0x151/0x250 [ 76.518949][ T5321] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.518961][ T5321] __se_sys_symlinkat+0x4e/0x2b0 [ 76.518974][ T5321] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.518984][ T5321] do_syscall_64+0x174/0x580 [ 76.518997][ T5321] ? trace_irq_disable+0x3b/0x140 [ 76.519015][ T5321] ? clear_bhb_loop+0x40/0x90 [ 76.519028][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.519039][ T5321] RIP: 0033:0x7f85fd59e019 [ 76.519051][ 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 [ 76.519061][ T5321] RSP: 002b:00007f85fe52ffe8 EFLAGS: 00000246 ORIG_RAX: 000000000000010a [ 76.519073][ T5321] RAX: ffffffffffffffda RBX: 00007f85fd825fa0 RCX: 00007f85fd59e019 [ 76.519081][ T5321] RDX: 00002000000009c0 RSI: ffffffffffffff9c RDI: 0000200000000980 [ 76.519089][ T5321] RBP: 00007f85fd63500c R08: 0000000000000000 R09: 0000000000000000 [ 76.519096][ T5321] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 76.519103][ T5321] R13: 00007f85fd826038 R14: 00007f85fd825fa0 R15: 00007ffc9edfc508 [ 76.519115][ T5321] [ 76.641295][ T24] audit: type=1800 audit(1785849675.042:6): pid=5322 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="enable" dev="configfs" ino=4249 res=0 errno=0 [ 76.651478][ T24] audit: type=1800 audit(1785849675.052:7): pid=5322 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="UDC" dev="configfs" ino=4250 res=0 errno=0 [ 76.895745][ T5319] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 77.046458][ T5319] usb 5-1: Dual-Role OTG device on HNP port [ 77.049077][ T5319] usb 5-1: New USB device found, idVendor=1d6b, idProduct=0104, bcdDevice= 7.02 [ 77.052467][ T5319] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 77.057986][ T1122] Using the BOT protocol [ 77.061947][ T1122] Using the UAS protocol [ 77.072322][ T5319] scsi host6: uas