program: r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10) r1 = syz_genetlink_get_family_id$nfc(&(0x7f00000000c0), 0xffffffffffffffff) sendmsg$NFC_CMD_FW_DOWNLOAD(r0, &(0x7f00000003c0)={&(0x7f0000000040)={0x10, 0x0, 0x0, 0x20000000}, 0xc, &(0x7f0000000280)={&(0x7f00000001c0)={0x4c, r1, 0x20, 0x70bd27, 0x25dfdbfd, {}, [@NFC_ATTR_FIRMWARE_NAME={0x5, 0x14, '.'}, @NFC_ATTR_FIRMWARE_NAME={0x5, 0x14, '/'}, @NFC_ATTR_FIRMWARE_NAME={0xe, 0x14, 'gid=forget'}, @NFC_ATTR_FIRMWARE_NAME={0xa, 0x14, 'anchor'}, @NFC_ATTR_FIRMWARE_NAME={0x4}, @NFC_ATTR_FIRMWARE_NAME={0x5, 0x14, ':'}]}, 0x4c}, 0x1, 0x0, 0x0, 0x40800}, 0x4094) syz_mount_image$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)="$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") r2 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r2, 0x2007ffc) sendfile(r2, r2, 0x0, 0x800000009) r3 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r4 = open(&(0x7f0000000080)='./bus\x00', 0x107382, 0x1d0) ftruncate(r4, 0x2007ffb) sendfile(r3, r4, 0x0, 0x1000000201005) syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000380)=ANY=[@ANYBLOB="1201500200000040"], 0x0) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) truncate(&(0x7f00000013c0)='./file1\x00', 0x0) [ 110.601243][ T5301] Bluetooth: hci0: command tx timeout [ 110.851095][ T5325] loop0: detected capacity change from 0 to 2048 [ 110.900080][ T5325] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 110.914697][ T5325] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 110.930315][ T5325] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 110.955173][ T5325] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 111.011121][ T24] audit: type=1800 audit(1776229564.743:2): pid=5325 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 [ 111.439048][ T786] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 111.719537][ T5325] [ 111.720670][ T5325] ============================================ [ 111.723309][ T5325] WARNING: possible recursive locking detected [ 111.726157][ T5325] syzkaller #0 Not tainted [ 111.728770][ T5325] -------------------------------------------- [ 111.732238][ T5325] syz.0.0/5325 is trying to acquire lock: [ 111.734930][ T5325] ffff888011e10d20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 111.739117][ T5325] [ 111.739117][ T5325] but task is already holding lock: [ 111.742269][ T5325] ffff888011e10d20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 111.746809][ T5325] [ 111.746809][ T5325] other info that might help us debug this: [ 111.750913][ T5325] Possible unsafe locking scenario: [ 111.750913][ T5325] [ 111.754620][ T5325] CPU0 [ 111.756110][ T5325] ---- [ 111.757572][ T5325] lock(&sbi->s_alloc_mutex); [ 111.759625][ T5325] lock(&sbi->s_alloc_mutex); [ 111.761813][ T5325] [ 111.761813][ T5325] *** DEADLOCK *** [ 111.761813][ T5325] [ 111.765532][ T5325] May be due to missing lock nesting notation [ 111.765532][ T5325] [ 111.769680][ T5325] 4 locks held by syz.0.0/5325: [ 111.772313][ T5325] #0: ffff888011c70410 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 111.776907][ T5325] #1: ffff888046f43cd8 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 111.781424][ T5325] #2: ffff888046f43ab8 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 111.786290][ T5325] #3: ffff888011e10d20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 111.792997][ T5325] [ 111.792997][ T5325] stack backtrace: [ 111.795150][ T5325] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 111.795170][ T5325] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 111.795179][ T5325] Call Trace: [ 111.795188][ T5325] [ 111.795194][ T5325] dump_stack_lvl+0xe8/0x150 [ 111.795217][ T5325] print_deadlock_bug+0x279/0x290 [ 111.795240][ T5325] __lock_acquire+0x253f/0x2cf0 [ 111.795253][ T5325] ? do_raw_spin_lock+0x12b/0x2f0 [ 111.795263][ T5325] ? do_raw_spin_lock+0x12b/0x2f0 [ 111.795275][ T5325] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 111.795286][ T5325] ? udf_free_blocks+0xaaf/0x1940 [ 111.795298][ T5325] lock_acquire+0x106/0x350 [ 111.795310][ T5325] ? udf_free_blocks+0xaaf/0x1940 [ 111.795325][ T5325] __mutex_lock+0x1a3/0x1550 [ 111.795397][ T5325] ? udf_free_blocks+0xaaf/0x1940 [ 111.795411][ T5325] ? __lock_acquire+0x6b5/0x2cf0 [ 111.795424][ T5325] ? udf_free_blocks+0xaaf/0x1940 [ 111.795436][ T5325] ? __pfx___mutex_lock+0x10/0x10 [ 111.795446][ T5325] ? folio_mark_accessed+0x42e/0x8c0 [ 111.795459][ T5325] ? fs_reclaim_acquire+0x7c/0x100 [ 111.795473][ T5325] ? fs_reclaim_acquire+0x7c/0x100 [ 111.795487][ T5325] udf_free_blocks+0xaaf/0x1940 [ 111.795503][ T5325] ? bdev_getblk+0x582/0x6e0 [ 111.795518][ T5325] ? udf_get_fileshortad+0x6e/0x1b0 [ 111.795531][ T5325] ? udf_current_aext+0x698/0xb30 [ 111.795541][ T5325] ? __pfx_udf_free_blocks+0x10/0x10 [ 111.795549][ T5325] ? udf_next_aext+0x447/0x530 [ 111.795560][ T5325] udf_delete_aext+0x4fb/0xbe0 [ 111.795571][ T5325] ? __pfx_udf_delete_aext+0x10/0x10 [ 111.795579][ T5325] ? udf_next_aext+0x44e/0x530 [ 111.795590][ T5325] udf_prealloc_blocks+0xbd3/0x1130 [ 111.795598][ T5325] ? bdev_getblk+0x582/0x6e0 [ 111.795606][ T5325] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 111.795616][ T5325] ? udf_map_block+0x15ca/0x4330 [ 111.795625][ T5325] udf_map_block+0x1e8a/0x4330 [ 111.795637][ T5325] ? __pfx_udf_map_block+0x10/0x10 [ 111.795648][ T5325] ? rcu_is_watching+0x15/0xb0 [ 111.795660][ T5325] ? do_raw_spin_unlock+0x4d/0x210 [ 111.795666][ T5325] __udf_get_block+0x52/0x250 [ 111.795676][ T5325] __block_write_begin_int+0x6c6/0x1910 [ 111.795686][ T5325] ? __pfx_udf_get_block+0x10/0x10 [ 111.795695][ T5325] ? __pfx___block_write_begin_int+0x10/0x10 [ 111.795704][ T5325] ? __pfx_udf_get_block+0x10/0x10 [ 111.795712][ T5325] block_write_begin+0x8d/0x120 [ 111.795720][ T5325] ? udf_write_begin+0x92/0x270 [ 111.795728][ T5325] udf_write_begin+0x118/0x270 [ 111.795748][ T5325] generic_perform_write+0x2e2/0x8f0 [ 111.795761][ T5325] ? __pfx_generic_perform_write+0x10/0x10 [ 111.795771][ T5325] ? generic_file_direct_write+0x385/0x3e0 [ 111.795782][ T5325] __generic_file_write_iter+0x1ae/0x230 [ 111.795793][ T5325] udf_file_write_iter+0x2ca/0x6b0 [ 111.795805][ T5325] iter_file_splice_write+0x9a1/0x10f0 [ 111.795820][ T5325] ? __pfx_iter_file_splice_write+0x10/0x10 [ 111.795835][ T5325] ? __pfx_iter_file_splice_write+0x10/0x10 [ 111.795845][ T5325] direct_splice_actor+0x101/0x160 [ 111.795855][ T5325] splice_direct_to_actor+0x53a/0xc70 [ 111.795865][ T5325] ? __pfx_direct_splice_actor+0x10/0x10 [ 111.795875][ T5325] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 111.795885][ T5325] do_splice_direct+0x195/0x290 [ 111.795894][ T5325] ? __pfx_do_splice_direct+0x10/0x10 [ 111.795903][ T5325] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 111.795910][ T5325] ? rw_verify_area+0x255/0x4d0 [ 111.795917][ T5325] do_sendfile+0x535/0x7d0 [ 111.795927][ T5325] ? __pfx_do_truncate+0x10/0x10 [ 111.795937][ T5325] ? __pfx_do_sendfile+0x10/0x10 [ 111.795949][ T5325] ? __se_sys_futex+0x3a8/0x450 [ 111.795963][ T5325] __se_sys_sendfile64+0x144/0x1a0 [ 111.795975][ T5325] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 111.795986][ T5325] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 111.795996][ T5325] do_syscall_64+0x15f/0xf80 [ 111.796007][ T5325] ? trace_irq_disable+0x3b/0x140 [ 111.796019][ T5325] ? clear_bhb_loop+0x40/0x90 [ 111.796033][ T5325] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 111.796045][ T5325] RIP: 0033:0x7f0498b9c819 [ 111.796058][ T5325] 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 [ 111.796067][ T5325] RSP: 002b:00007f049999efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 111.796082][ T5325] RAX: ffffffffffffffda RBX: 00007f0498e15fa0 RCX: 00007f0498b9c819 [ 111.796091][ T5325] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 [ 111.796098][ T5325] RBP: 00007f0498c32c91 R08: 0000000000000000 R09: 0000000000000000 [ 111.796103][ T5325] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 111.796110][ T5325] R13: 00007f0498e16038 R14: 00007f0498e15fa0 R15: 00007ffdbd38f628 [ 111.796120][ T5325] [ 112.649003][ T5301] Bluetooth: hci0: command tx timeout [ 114.729591][ T5301] Bluetooth: hci0: command tx timeout [ 116.648926][ T786] usb 5-1: unable to get BOS descriptor or descriptor too short [ 116.652797][ T786] usb 5-1: no configurations [ 116.656093][ T786] usb 5-1: can't read configurations, error -22 [ 116.788671][ T786] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 116.918491][ T786] usb 5-1: device descriptor read/64, error -32 [ 117.028714][ T786] usb usb5-port1: attempt power cycle [ 117.368621][ T786] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 117.388795][ T786] usb 5-1: device descriptor read/8, error -32