program: openat$sndtimer(0xffffffffffffff9c, &(0x7f0000000000), 0x0) r0 = socket$inet6_tcp(0xa, 0x1, 0x0) bind$inet6(r0, &(0x7f0000000500)={0xa, 0x4e22, 0x1000c, @ipv4={'\x00', '\xff\xff', @loopback}, 0x5}, 0x1c) connect$inet6(r0, &(0x7f0000000080)={0xa, 0x4e22, 0x7, @ipv4={'\x00', '\xff\xff', @empty}, 0x3}, 0x1c) fcntl$dupfd(r0, 0x406, r0) syz_mount_image$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)="$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") r1 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r1, 0x2007ffc) r2 = socket(0x10, 0x803, 0x0) sendto(r2, &(0x7f00000000c0)="120000001200e7ef007b00000000000000a1", 0x12, 0x0, 0x0, 0x0) recvmmsg(r2, &(0x7f00000037c0)=[{{0x0, 0x0, &(0x7f00000006c0)=[{&(0x7f0000000000)=""/102, 0x66}, {&(0x7f0000000280)=""/76, 0x4c}, {&(0x7f0000000fc0)=""/4096, 0x1000}, {&(0x7f0000000400)=""/92, 0x5c}, {&(0x7f0000000980)=""/73, 0x49}, {&(0x7f00000007c0)=""/154, 0x9a}, {&(0x7f0000000100)=""/23, 0x17}, {&(0x7f0000003800)=""/4096, 0x1000}, {&(0x7f0000000080)=""/7, 0x7}], 0x9}}], 0x1, 0x0, 0x0) sendfile(r1, r1, 0x0, 0x800000009) r3 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r4 = open(&(0x7f0000000080)='./bus\x00', 0x107382, 0x1d0) ftruncate(r4, 0x2007ffb) sendfile(r3, r4, 0x0, 0x1000000201005) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000100)='net_prio.prioidx\x00', 0x275a, 0x0) [ 85.643215][ T4664] Bluetooth: hci0: command tx timeout [ 85.794970][ T5324] loop0: detected capacity change from 0 to 2048 [ 85.813218][ T5324] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 85.834966][ T5324] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 85.839929][ T5324] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 85.854718][ T5324] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 85.869712][ T25] audit: type=1800 audit(1771693180.359:2): pid=5324 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 [ 86.040451][ T5324] [ 86.041643][ T5324] ============================================ [ 86.044338][ T5324] WARNING: possible recursive locking detected [ 86.047073][ T5324] syzkaller #0 Not tainted [ 86.049044][ T5324] -------------------------------------------- [ 86.051731][ T5324] syz.0.0/5324 is trying to acquire lock: [ 86.054099][ T5324] ffff88801f539528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 86.059095][ T5324] [ 86.059095][ T5324] but task is already holding lock: [ 86.062303][ T5324] ffff88801f539528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 86.066798][ T5324] [ 86.066798][ T5324] other info that might help us debug this: [ 86.070185][ T5324] Possible unsafe locking scenario: [ 86.070185][ T5324] [ 86.073991][ T5324] CPU0 [ 86.075527][ T5324] ---- [ 86.077034][ T5324] lock(&sbi->s_alloc_mutex); [ 86.079045][ T5324] lock(&sbi->s_alloc_mutex); [ 86.080999][ T5324] [ 86.080999][ T5324] *** DEADLOCK *** [ 86.080999][ T5324] [ 86.084428][ T5324] May be due to missing lock nesting notation [ 86.084428][ T5324] [ 86.087869][ T5324] 4 locks held by syz.0.0/5324: [ 86.090013][ T5324] #0: ffff888037772420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 86.094304][ T5324] #1: ffff888047a6bb70 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 86.098981][ T5324] #2: ffff888047a6b9a0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 86.102883][ T5324] #3: ffff88801f539528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 86.107425][ T5324] [ 86.107425][ T5324] stack backtrace: [ 86.110001][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 86.110018][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 86.110025][ T5324] Call Trace: [ 86.110033][ T5324] [ 86.115111][ T5324] dump_stack_lvl+0xe8/0x150 [ 86.115127][ T5324] print_deadlock_bug+0x279/0x290 [ 86.115140][ T5324] __lock_acquire+0x253f/0x2cf0 [ 86.115155][ T5324] ? __pfx___schedule+0x10/0x10 [ 86.115381][ T5324] ? __queue_work+0x1a1/0x1020 [ 86.115399][ T5324] lock_acquire+0xf0/0x2e0 [ 86.115412][ T5324] ? udf_free_blocks+0xaaf/0x1940 [ 86.115429][ T5324] __mutex_lock+0x19f/0x1300 [ 86.115445][ T5324] ? udf_free_blocks+0xaaf/0x1940 [ 86.115459][ T5324] ? lockdep_unlock+0x5d/0xd0 [ 86.115470][ T5324] ? __lock_acquire+0x146e/0x2cf0 [ 86.115483][ T5324] ? udf_free_blocks+0xaaf/0x1940 [ 86.115497][ T5324] ? __pfx___mutex_lock+0x10/0x10 [ 86.115514][ T5324] udf_free_blocks+0xaaf/0x1940 [ 86.115530][ T5324] ? bdev_getblk+0x582/0x6e0 [ 86.115546][ T5324] ? udf_get_fileshortad+0x6e/0x1b0 [ 86.115559][ T5324] ? udf_current_aext+0x698/0xb30 [ 86.115575][ T5324] ? __pfx_udf_free_blocks+0x10/0x10 [ 86.115596][ T5324] ? udf_next_aext+0x447/0x530 [ 86.115616][ T5324] udf_delete_aext+0x4fb/0xbd0 [ 86.115631][ T5324] ? __pfx_udf_delete_aext+0x10/0x10 [ 86.115642][ T5324] ? udf_next_aext+0x44e/0x530 [ 86.115655][ T5324] udf_prealloc_blocks+0xbd3/0x1130 [ 86.115665][ T5324] ? bdev_getblk+0x582/0x6e0 [ 86.115677][ T5324] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 86.115688][ T5324] ? udf_map_block+0x15ca/0x4330 [ 86.115699][ T5324] udf_map_block+0x1e8a/0x4330 [ 86.115720][ T5324] ? __pfx_udf_map_block+0x10/0x10 [ 86.115738][ T5324] ? rcu_is_watching+0x15/0xb0 [ 86.115758][ T5324] ? do_raw_spin_unlock+0x4d/0x210 [ 86.115769][ T5324] __udf_get_block+0x52/0x250 [ 86.115786][ T5324] __block_write_begin_int+0x6c6/0x1910 [ 86.115798][ T5324] ? __pfx_udf_get_block+0x10/0x10 [ 86.115808][ T5324] ? __pfx___block_write_begin_int+0x10/0x10 [ 86.115815][ T5324] ? __pfx_udf_get_block+0x10/0x10 [ 86.115824][ T5324] block_write_begin+0x8d/0x120 [ 86.115830][ T5324] ? udf_write_begin+0x92/0x270 [ 86.115839][ T5324] udf_write_begin+0x118/0x270 [ 86.115849][ T5324] generic_perform_write+0x2e2/0x8f0 [ 86.115858][ T5324] ? __pfx_generic_perform_write+0x10/0x10 [ 86.115866][ T5324] ? generic_file_direct_write+0x385/0x3e0 [ 86.115877][ T5324] __generic_file_write_iter+0x1ae/0x230 [ 86.115888][ T5324] udf_file_write_iter+0x2ca/0x6b0 [ 86.115905][ T5324] iter_file_splice_write+0x99b/0x1100 [ 86.115924][ T5324] ? __pfx_iter_file_splice_write+0x10/0x10 [ 86.115942][ T5324] ? __pfx_iter_file_splice_write+0x10/0x10 [ 86.115956][ T5324] direct_splice_actor+0x101/0x160 [ 86.115970][ T5324] splice_direct_to_actor+0x53a/0xc70 [ 86.115984][ T5324] ? __pfx_direct_splice_actor+0x10/0x10 [ 86.115998][ T5324] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 86.116013][ T5324] do_splice_direct+0x195/0x290 [ 86.116026][ T5324] ? __pfx_do_splice_direct+0x10/0x10 [ 86.116038][ T5324] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 86.116053][ T5324] ? rw_verify_area+0x255/0x4d0 [ 86.116069][ T5324] do_sendfile+0x535/0x7d0 [ 86.116082][ T5324] ? __pfx_do_sendfile+0x10/0x10 [ 86.116095][ T5324] ? __se_sys_futex+0x3a8/0x450 [ 86.116110][ T5324] __se_sys_sendfile64+0x144/0x1a0 [ 86.116121][ T5324] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 86.116133][ T5324] do_syscall_64+0x14d/0xf80 [ 86.116148][ T5324] ? trace_irq_disable+0x3b/0x150 [ 86.116163][ T5324] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.116173][ T5324] ? clear_bhb_loop+0x40/0x90 [ 86.116187][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.116199][ T5324] RIP: 0033:0x7f2906d9c629 [ 86.116212][ T5324] 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 [ 86.116220][ T5324] RSP: 002b:00007f2907ce5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 86.116235][ T5324] RAX: ffffffffffffffda RBX: 00007f2907015fa0 RCX: 00007f2906d9c629 [ 86.116243][ T5324] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000007 [ 86.116249][ T5324] RBP: 00007f2906e32b39 R08: 0000000000000000 R09: 0000000000000000 [ 86.116257][ T5324] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 86.116264][ T5324] R13: 00007f2907016038 R14: 00007f2907015fa0 R15: 00007ffda11cb628 [ 86.116278][ T5324] [ 87.666393][ T4664] Bluetooth: hci0: command tx timeout [ 89.743227][ T4664] Bluetooth: hci0: command tx timeout [ 91.822716][ T4664] Bluetooth: hci0: command tx timeout [ 91.832575][ T9] cfg80211: failed to load regulatory.db