program: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x8000002}, 0x1c) setsockopt$inet6_int(r0, 0x29, 0x5, &(0x7f00000003c0)=0x5ee, 0x4) sendto$inet6(r0, 0x0, 0x0, 0x2200c041, &(0x7f0000b63fe4)={0xa, 0x2, 0x0, @loopback}, 0x1c) r1 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0) ioctl$TIOCPKT(r1, 0x5420, &(0x7f0000000100)=0xcf5) ioctl$TCSETS(r1, 0x40045431, &(0x7f0000000dc0)={0x0, 0x0, 0x0, 0x0, 0x0, "0062ba7d82000000000000000000f7ffffff00"}) r2 = syz_open_pts(r1, 0x0) ioctl$TIOCSETD(r2, 0x5437, 0x0) setsockopt$inet6_IPV6_DSTOPTS(r0, 0x29, 0x3b, &(0x7f00000001c0)=ANY=[], 0x10) syz_mount_image$udf(&(0x7f0000000180), &(0x7f0000000100)='./bus\x00', 0x1014494, &(0x7f00000002c0)={[{@iocharset={'iocharset', 0x3d, 'iso8859-4'}}, {@partition={'partition', 0x3d, 0x6}}, {@gid_forget}, {@session={'session', 0x3d, 0xfe8}}, {@noadinicb}, {@anchor}, {@uid_forget}]}, 0xfe, 0xc24, &(0x7f0000001480)="$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") r3 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r3, 0x2007ffc) sendfile(r3, r3, 0x0, 0x800000009) r4 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r5 = open(&(0x7f0000000080)='./bus\x00', 0x107382, 0x1d0) ftruncate(r5, 0x2007ffb) sendfile(r4, r5, 0x0, 0x1000000201005) syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000380)=ANY=[@ANYBLOB="1201500200000040"], 0x0) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) truncate(&(0x7f00000013c0)='./file1\x00', 0x0) sendto$inet6(r0, &(0x7f0000000000)='D', 0x1, 0x20000055, 0x0, 0x0) r6 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000540)='pids.events\x00', 0x275a, 0x0) write$binfmt_script(r6, &(0x7f0000000000), 0x208e24b) ioctl$PERF_EVENT_IOC_QUERY_BPF(r6, 0xc008240a, &(0x7f0000000080)=ANY=[@ANYBLOB="070000000000000000000000000000000000000000000000000000006645aa8300000000"]) [ 84.621564][ T4668] Bluetooth: hci0: command tx timeout [ 84.760581][ T5329] loop0: detected capacity change from 0 to 2048 [ 84.779782][ T5329] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 84.795773][ T5329] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 84.817869][ T5329] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 84.828123][ T5329] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 84.848836][ T24] audit: type=1800 audit(1774870994.847:2): pid=5329 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed(directio) comm="syz.0.0" name="file1" dev="loop0" ino=1346 res=0 errno=0 [ 85.216687][ T5317] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 85.470027][ T5329] [ 85.471218][ T5329] ============================================ [ 85.473936][ T5329] WARNING: possible recursive locking detected [ 85.476687][ T5329] syzkaller #0 Not tainted [ 85.478978][ T5329] -------------------------------------------- [ 85.482212][ T5329] syz.0.0/5329 is trying to acquire lock: [ 85.484929][ T5329] ffff888011acf928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 85.489310][ T5329] [ 85.489310][ T5329] but task is already holding lock: [ 85.492447][ T5329] ffff888011acf928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 85.496935][ T5329] [ 85.496935][ T5329] other info that might help us debug this: [ 85.501046][ T5329] Possible unsafe locking scenario: [ 85.501046][ T5329] [ 85.504439][ T5329] CPU0 [ 85.505885][ T5329] ---- [ 85.507409][ T5329] lock(&sbi->s_alloc_mutex); [ 85.509785][ T5329] lock(&sbi->s_alloc_mutex); [ 85.511830][ T5329] [ 85.511830][ T5329] *** DEADLOCK *** [ 85.511830][ T5329] [ 85.515277][ T5329] May be due to missing lock nesting notation [ 85.515277][ T5329] [ 85.518876][ T5329] 5 locks held by syz.0.0/5329: [ 85.520973][ T5329] #0: ffff88801a8d2638 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 [ 85.524939][ T5329] #1: ffff888011d8e420 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x227/0xb90 [ 85.529132][ T5329] #2: ffff888047bdaed0 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 85.534063][ T5329] #3: ffff888047bdad00 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 85.538529][ T5329] #4: ffff888011acf928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 85.544164][ T5329] [ 85.544164][ T5329] stack backtrace: [ 85.546772][ T5329] CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.546793][ T5329] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.546802][ T5329] Call Trace: [ 85.546811][ T5329] [ 85.546817][ T5329] dump_stack_lvl+0xe8/0x150 [ 85.546841][ T5329] print_deadlock_bug+0x279/0x290 [ 85.546862][ T5329] __lock_acquire+0x253f/0x2cf0 [ 85.546877][ T5329] ? __pfx___schedule+0x10/0x10 [ 85.546978][ T5329] ? __queue_work+0x1a1/0x1020 [ 85.547001][ T5329] lock_acquire+0xf0/0x2e0 [ 85.547015][ T5329] ? udf_free_blocks+0xaaf/0x1940 [ 85.547029][ T5329] __mutex_lock+0x19f/0x1300 [ 85.547042][ T5329] ? udf_free_blocks+0xaaf/0x1940 [ 85.547055][ T5329] ? __lock_acquire+0x6b5/0x2cf0 [ 85.547071][ T5329] ? udf_free_blocks+0xaaf/0x1940 [ 85.547082][ T5329] ? __pfx___mutex_lock+0x10/0x10 [ 85.547095][ T5329] ? folio_mark_accessed+0x442/0x8c0 [ 85.547112][ T5329] udf_free_blocks+0xaaf/0x1940 [ 85.547124][ T5329] ? bdev_getblk+0x582/0x6e0 [ 85.547136][ T5329] ? udf_get_fileshortad+0x6e/0x1b0 [ 85.547148][ T5329] ? udf_current_aext+0x698/0xb30 [ 85.547164][ T5329] ? __pfx_udf_free_blocks+0x10/0x10 [ 85.547178][ T5329] ? udf_next_aext+0x447/0x530 [ 85.547196][ T5329] udf_delete_aext+0x4fb/0xbd0 [ 85.547214][ T5329] ? __pfx_udf_delete_aext+0x10/0x10 [ 85.547227][ T5329] ? udf_next_aext+0x44e/0x530 [ 85.547243][ T5329] udf_prealloc_blocks+0xbd3/0x1130 [ 85.547257][ T5329] ? udf_current_aext+0x69f/0xb30 [ 85.547273][ T5329] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 85.547284][ T5329] ? udf_next_aext+0x447/0x530 [ 85.547300][ T5329] udf_map_block+0x1e8a/0x4330 [ 85.547328][ T5329] ? __pfx_udf_map_block+0x10/0x10 [ 85.547349][ T5329] ? rcu_is_watching+0x15/0xb0 [ 85.547373][ T5329] ? do_raw_spin_unlock+0x4d/0x210 [ 85.547387][ T5329] __udf_get_block+0x52/0x250 [ 85.547400][ T5329] __block_write_begin_int+0x6c6/0x1910 [ 85.547423][ T5329] ? __pfx_udf_get_block+0x10/0x10 [ 85.547434][ T5329] ? __pfx___block_write_begin_int+0x10/0x10 [ 85.547450][ T5329] ? __pfx_udf_get_block+0x10/0x10 [ 85.547461][ T5329] block_write_begin+0x8d/0x120 [ 85.547472][ T5329] ? udf_write_begin+0x92/0x270 [ 85.547483][ T5329] udf_write_begin+0x118/0x270 [ 85.547495][ T5329] generic_perform_write+0x2e2/0x8f0 [ 85.547509][ T5329] ? __pfx_generic_perform_write+0x10/0x10 [ 85.547521][ T5329] ? file_update_time_flags+0x219/0x4a0 [ 85.547532][ T5329] ? __generic_file_write_iter+0xf9/0x230 [ 85.547543][ T5329] ? udf_file_write_iter+0x1a3/0x6b0 [ 85.547554][ T5329] udf_file_write_iter+0x2ca/0x6b0 [ 85.547568][ T5329] vfs_write+0x61d/0xb90 [ 85.547581][ T5329] ? __pfx_vfs_write+0x10/0x10 [ 85.547592][ T5329] ? __fget_files+0x2a/0x420 [ 85.547607][ T5329] ksys_write+0x150/0x270 [ 85.547616][ T5329] ? __pfx_ksys_write+0x10/0x10 [ 85.547628][ T5329] do_syscall_64+0x14d/0xf80 [ 85.547641][ T5329] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.547676][ T5329] ? clear_bhb_loop+0x40/0x90 [ 85.547689][ T5329] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.547701][ T5329] RIP: 0033:0x7f473e19c819 [ 85.547715][ T5329] 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 [ 85.547781][ T5329] RSP: 002b:00007f473f0affe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 85.547799][ T5329] RAX: ffffffffffffffda RBX: 00007f473e415fa0 RCX: 00007f473e19c819 [ 85.547807][ T5329] RDX: 000000000208e24b RSI: 0000200000000000 RDI: 000000000000000c [ 85.547816][ T5329] RBP: 00007f473e232c91 R08: 0000000000000000 R09: 0000000000000000 [ 85.547823][ T5329] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.547830][ T5329] R13: 00007f473e416038 R14: 00007f473e415fa0 R15: 00007ffd866c8088 [ 85.547843][ T5329] [ 86.676979][ T4668] Bluetooth: hci0: command tx timeout [ 88.756927][ T5301] Bluetooth: hci0: command tx timeout [ 90.436908][ T5317] usb 5-1: unable to get BOS descriptor or descriptor too short [ 90.440879][ T5317] usb 5-1: no configurations [ 90.443175][ T5317] usb 5-1: can't read configurations, error -22 [ 90.566930][ T5317] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 90.696591][ T5317] usb 5-1: device descriptor read/64, error -32 [ 90.806751][ T5317] usb usb5-port1: attempt power cycle [ 90.836775][ T5301] Bluetooth: hci0: command tx timeout [ 91.146664][ T5317] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 91.166878][ T5317] usb 5-1: device descriptor read/8, error -32 [ 91.406642][ T5317] usb 5-1: new high-speed USB device number 5 using dummy_hcd [ 91.426961][ T5317] usb 5-1: device descriptor read/8, error -32 [ 91.536748][ T5317] usb usb5-port1: unable to enumerate USB device