program: 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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") r0 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r0, 0x2007ffc) sendfile(r0, r0, 0x0, 0x800000009) r1 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r2 = open(&(0x7f0000000080)='./bus\x00', 0x107382, 0x1d0) r3 = socket$can_bcm(0x1d, 0x2, 0x2) sendmsg$can_bcm(r3, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f00000000c0)={0x5, 0x0, 0x0, {}, {0x77359400}, {}, 0x2, @can={{}, 0x0, 0x0, 0x0, 0x0, "3fd31340e92c4bb8"}}, 0x48}, 0x300}, 0x0) ftruncate(r2, 0x2007ffb) sendfile(r1, r2, 0x0, 0x1000000201005) syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000140)={{0x12, 0x1, 0x250, 0x0, 0x0, 0x0, 0x40, 0x6cb, 0x2968, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x24, 0x1, 0x1, 0x2, 0x20, 0x5, [{{0x9, 0x4, 0x0, 0xfe, 0x1, 0x3, 0x1, 0x3, 0x0, {0x9, 0x21, 0x7, 0x1, 0x1, {0x22, 0x9f8}}, {{{0x9, 0x5, 0x81, 0x3, 0x40, 0x1, 0x80, 0xb5}}}}}]}}]}}, 0x0) truncate(&(0x7f00000013c0)='./file1\x00', 0x0) writev(r1, &(0x7f0000000040)=[{&(0x7f0000000380)="1b2ffdcc464fb208e5f9ae50a056714f724a30bf9d672a25117351f43b2d1a6db2000df95ea66313ffae798e1765e31b5ef61e084b802cb6e46828027bee", 0xfdef}], 0x1) symlink(&(0x7f0000000080)='.\x00', &(0x7f0000000000)='./file0\x00') [ 75.595821][ T5336] Bluetooth: hci0: command tx timeout [ 75.669051][ T5357] loop0: detected capacity change from 0 to 2048 [ 75.682060][ T5357] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 75.719776][ T5357] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 75.745252][ T5357] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 75.766975][ T5357] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 75.793876][ T25] audit: type=1800 audit(1756096167.143:2): pid=5357 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 [ 76.133465][ T5355] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 76.348704][ T1315] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.351652][ T1315] ieee802154 phy1 wpan1: encryption failed: -22 [ 76.380836][ T5357] [ 76.381991][ T5357] ============================================ [ 76.386171][ T5357] WARNING: possible recursive locking detected [ 76.389002][ T5357] syzkaller #0 Not tainted [ 76.391015][ T5357] -------------------------------------------- [ 76.393740][ T5357] syz.0.0/5357 is trying to acquire lock: [ 76.396215][ T5357] ffff888040225d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0x9e2/0x17f0 [ 76.400534][ T5357] [ 76.400534][ T5357] but task is already holding lock: [ 76.403630][ T5357] ffff888040225d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 76.407825][ T5357] [ 76.407825][ T5357] other info that might help us debug this: [ 76.411237][ T5357] Possible unsafe locking scenario: [ 76.411237][ T5357] [ 76.414402][ T5357] CPU0 [ 76.415857][ T5357] ---- [ 76.417371][ T5357] lock(&sbi->s_alloc_mutex); [ 76.419508][ T5357] lock(&sbi->s_alloc_mutex); [ 76.421654][ T5357] [ 76.421654][ T5357] *** DEADLOCK *** [ 76.421654][ T5357] [ 76.425670][ T5357] May be due to missing lock nesting notation [ 76.425670][ T5357] [ 76.429365][ T5357] 5 locks held by syz.0.0/5357: [ 76.431561][ T5357] #0: ffff88804295fef8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 [ 76.435430][ T5357] #1: ffff88801150c428 (sb_writers#12){.+.+}-{0:0}, at: vfs_writev+0x288/0x960 [ 76.439395][ T5357] #2: ffff8880446215c0 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: udf_file_write_iter+0x6e/0x6c0 [ 76.443970][ T5357] #3: ffff8880446213f0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x283/0x45f0 [ 76.448056][ T5357] #4: ffff888040225d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 76.452649][ T5357] [ 76.452649][ T5357] stack backtrace: [ 76.455153][ T5357] CPU: 0 UID: 0 PID: 5357 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 76.455170][ T5357] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 76.455178][ T5357] Call Trace: [ 76.455187][ T5357] [ 76.455193][ T5357] dump_stack_lvl+0x189/0x250 [ 76.455214][ T5357] ? __pfx_dump_stack_lvl+0x10/0x10 [ 76.455228][ T5357] ? __pfx__printk+0x10/0x10 [ 76.455245][ T5357] ? print_lock_name+0xde/0x100 [ 76.455262][ T5357] print_deadlock_bug+0x28b/0x2a0 [ 76.455276][ T5357] validate_chain+0x1a3f/0x2140 [ 76.455292][ T5357] __lock_acquire+0xab9/0xd20 [ 76.455307][ T5357] ? udf_free_blocks+0x9e2/0x17f0 [ 76.455323][ T5357] lock_acquire+0x120/0x360 [ 76.455339][ T5357] ? udf_free_blocks+0x9e2/0x17f0 [ 76.455357][ T5357] __mutex_lock+0x187/0x1350 [ 76.455413][ T5357] ? udf_free_blocks+0x9e2/0x17f0 [ 76.455439][ T5357] ? folio_mark_accessed+0x42c/0x8b0 [ 76.455457][ T5357] ? __pfx_folio_mark_accessed+0x10/0x10 [ 76.455475][ T5357] ? udf_free_blocks+0x9e2/0x17f0 [ 76.455491][ T5357] ? __pfx___mutex_lock+0x10/0x10 [ 76.455506][ T5357] ? __pfx___might_resched+0x10/0x10 [ 76.455516][ T5357] ? fs_reclaim_acquire+0x7d/0x100 [ 76.455531][ T5357] udf_free_blocks+0x9e2/0x17f0 [ 76.455549][ T5357] ? udf_get_fileshortad+0x6e/0x1b0 [ 76.455566][ T5357] ? __pfx_udf_free_blocks+0x10/0x10 [ 76.455586][ T5357] udf_delete_aext+0x4df/0xbc0 [ 76.455597][ T5357] ? udf_get_fileshortad+0xcb/0x1b0 [ 76.455614][ T5357] ? __pfx_udf_delete_aext+0x10/0x10 [ 76.455626][ T5357] udf_prealloc_blocks+0xb7e/0x10b0 [ 76.455643][ T5357] ? udf_get_filelongad+0x6e/0x1b0 [ 76.455658][ T5357] ? __pfx_udf_new_block+0x10/0x10 [ 76.455671][ T5357] ? udf_current_aext+0x660/0xad0 [ 76.455682][ T5357] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 76.455700][ T5357] ? udf_map_block+0x1662/0x45f0 [ 76.455711][ T5357] udf_map_block+0x1f70/0x45f0 [ 76.455727][ T5357] ? __pfx_udf_map_block+0x10/0x10 [ 76.455747][ T5357] ? do_raw_spin_unlock+0x4d/0x240 [ 76.455762][ T5357] __udf_get_block+0x52/0x250 [ 76.455774][ T5357] __block_write_begin_int+0x6b5/0x1900 [ 76.455789][ T5357] ? folio_add_lru+0x1b2/0x3d0 [ 76.455804][ T5357] ? __pfx_udf_get_block+0x10/0x10 [ 76.455814][ T5357] ? __pfx___block_write_begin_int+0x10/0x10 [ 76.455828][ T5357] ? __pfx_udf_get_block+0x10/0x10 [ 76.455837][ T5357] block_write_begin+0x8a/0x120 [ 76.455848][ T5357] ? udf_write_begin+0x92/0x270 [ 76.455858][ T5357] udf_write_begin+0x115/0x270 [ 76.455869][ T5357] generic_perform_write+0x2c5/0x900 [ 76.455883][ T5357] ? __pfx_generic_perform_write+0x10/0x10 [ 76.455893][ T5357] ? file_update_time+0x416/0x490 [ 76.455910][ T5357] ? __generic_file_write_iter+0xf9/0x230 [ 76.455921][ T5357] ? udf_file_write_iter+0x1a3/0x6c0 [ 76.455935][ T5357] udf_file_write_iter+0x2d5/0x6c0 [ 76.455951][ T5357] do_iter_readv_writev+0x619/0x8b0 [ 76.455967][ T5357] ? __pfx_do_iter_readv_writev+0x10/0x10 [ 76.455979][ T5357] ? rcu_read_lock_any_held+0xb3/0x120 [ 76.455994][ T5357] vfs_writev+0x31a/0x960 [ 76.456012][ T5357] ? __lock_acquire+0xab9/0xd20 [ 76.456024][ T5357] ? __pfx_vfs_writev+0x10/0x10 [ 76.456056][ T5357] ? __fget_files+0x2a/0x420 [ 76.456072][ T5357] ? __fget_files+0x3a0/0x420 [ 76.456087][ T5357] ? __fget_files+0x2a/0x420 [ 76.456104][ T5357] do_writev+0x14d/0x2d0 [ 76.456120][ T5357] ? __pfx_do_writev+0x10/0x10 [ 76.456133][ T5357] ? rcu_is_watching+0x15/0xb0 [ 76.456141][ T5357] ? do_syscall_64+0xbe/0x3b0 [ 76.456151][ T5357] do_syscall_64+0xfa/0x3b0 [ 76.456160][ T5357] ? lockdep_hardirqs_on+0x9c/0x150 [ 76.456170][ T5357] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.456179][ T5357] ? clear_bhb_loop+0x60/0xb0 [ 76.456187][ T5357] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.456196][ T5357] RIP: 0033:0x7f4177d8ebe9 [ 76.456205][ T5357] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 76.456211][ T5357] RSP: 002b:00007f4178c5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 76.456221][ T5357] RAX: ffffffffffffffda RBX: 00007f4177fb5fa0 RCX: 00007f4177d8ebe9 [ 76.456226][ T5357] RDX: 0000000000000001 RSI: 0000200000000040 RDI: 0000000000000005 [ 76.456230][ T5357] RBP: 00007f4177e11e19 R08: 0000000000000000 R09: 0000000000000000 [ 76.456235][ T5357] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 76.456239][ T5357] R13: 00007f4177fb6038 R14: 00007f4177fb5fa0 R15: 00007ffca430d338 [ 76.456246][ T5357] [ 77.623390][ T5336] Bluetooth: hci0: command tx timeout [ 79.703898][ T5336] Bluetooth: hci0: command tx timeout [ 81.303431][ T5355] usb 5-1: unable to get BOS descriptor or descriptor too short [ 81.307627][ T5355] usb 5-1: unable to read config index 0 descriptor/start: -32 [ 81.311581][ T5355] usb 5-1: chopping to 0 config(s) [ 81.314590][ T5355] usb 5-1: can't read configurations, error -32 [ 81.443396][ T5355] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 81.573378][ T5355] usb 5-1: device descriptor read/64, error -32 [ 81.683452][ T5355] usb usb5-port1: attempt power cycle [ 81.783430][ T5336] Bluetooth: hci0: command tx timeout [ 82.023377][ T5355] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 82.044074][ T5355] usb 5-1: device descriptor read/8, error -32 [ 82.283382][ T5355] usb 5-1: new high-speed USB device number 5 using dummy_hcd [ 82.303716][ T5355] usb 5-1: device descriptor read/8, error -32 [ 82.413670][ T5355] usb usb5-port1: unable to enumerate USB device