program: r0 = syz_open_procfs(0x0, &(0x7f00000002c0)='timerslack_ns\x00') openat$dir(0xffffffffffffff9c, 0x0, 0x140, 0x82) syz_mount_image$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)="$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") r1 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r1, 0x2007ffc) sendfile(r1, r1, 0x0, 0x800000009) r2 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r3 = open(&(0x7f0000000080)='./bus\x00', 0x185102, 0x0) ftruncate(r3, 0x2007ffb) sendfile(r2, r3, 0x0, 0x1000000201005) r4 = syz_open_dev$loop(&(0x7f0000000140), 0x0, 0x0) ioctl$LOOP_SET_BLOCK_SIZE(r4, 0x4c09, 0x8000) ioctl$SCSI_IOCTL_SEND_COMMAND(r2, 0x1, &(0x7f0000000380)={0x29, 0x1, 0x9, "003bc99de54a068f1f8e02db0b2a130a2e0e25d97d269099cd8698f69d357ada83e615008751cef68e"}) r5 = openat$snapshot(0xffffffffffffff9c, &(0x7f0000000140), 0x80003, 0x0) ioctl$SNAPSHOT_FREE_SWAP_PAGES(r5, 0x3309) fcntl$setstatus(r0, 0x4, 0x40800) prctl$PR_SET_MM_MAP(0x23, 0xe, &(0x7f0000000080)={&(0x7f0000ff0000/0x1000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f0000ffc000/0x4000)=nil, &(0x7f0000ffc000/0x4000)=nil, &(0x7f0000ff8000/0x4000)=nil, &(0x7f0000ff8000/0x3000)=nil, &(0x7f0000ffb000/0x3000)=nil, &(0x7f000068c000/0xc000)=nil, &(0x7f0000817000/0x1000)=nil, &(0x7f0000ffa000/0x1000)=nil, &(0x7f0000ffa000/0x2000)=nil, 0x0}, 0x68) sendmsg$NFT_BATCH(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0x0, 0x0}, 0x0) io_uring_setup(0x7, &(0x7f0000000040)={0x0, 0xc8a1, 0xc000, 0x8, 0xc1}) bpf$PROG_LOAD(0x5, &(0x7f0000000000)={0x12, 0x3, 0x0, &(0x7f0000000240)='syzkaller\x00', 0x80000000, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) bpf$MAP_CREATE(0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="16"], 0x50) r6 = creat(&(0x7f0000000040)='./file1\x00', 0x1c0) write$fb(r6, &(0x7f0000000280)="7f3d9f3d", 0x4) [ 73.635375][ T5303] Bluetooth: hci0: command tx timeout [ 73.722539][ T5322] loop0: detected capacity change from 0 to 2048 [ 73.742078][ T5322] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 73.765494][ T5322] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 73.776698][ T5322] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 73.792814][ T5322] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 73.803277][ T26] audit: type=1800 audit(1769374459.096:2): pid=5322 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 [ 73.978354][ T5324] random: crng reseeded on system resumption [ 74.115639][ T5323] [ 74.116796][ T5323] ============================================ [ 74.119558][ T5323] WARNING: possible recursive locking detected [ 74.122253][ T5323] syzkaller #0 Not tainted [ 74.124268][ T5323] -------------------------------------------- [ 74.126970][ T5323] syz.0.0/5323 is trying to acquire lock: [ 74.129546][ T5323] ffff888034aa8928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 74.133719][ T5323] [ 74.133719][ T5323] but task is already holding lock: [ 74.136813][ T5323] ffff888034aa8928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 74.141060][ T5323] [ 74.141060][ T5323] other info that might help us debug this: [ 74.144325][ T5323] Possible unsafe locking scenario: [ 74.144325][ T5323] [ 74.147700][ T5323] CPU0 [ 74.149211][ T5323] ---- [ 74.150770][ T5323] lock(&sbi->s_alloc_mutex); [ 74.152929][ T5323] lock(&sbi->s_alloc_mutex); [ 74.155038][ T5323] [ 74.155038][ T5323] *** DEADLOCK *** [ 74.155038][ T5323] [ 74.158575][ T5323] May be due to missing lock nesting notation [ 74.158575][ T5323] [ 74.162201][ T5323] 4 locks held by syz.0.0/5323: [ 74.164295][ T5323] #0: ffff8880119b0420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 74.168393][ T5323] #1: ffff8880117a1590 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 74.173013][ T5323] #2: ffff8880117a13c0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 74.177257][ T5323] #3: ffff888034aa8928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 74.181893][ T5323] [ 74.181893][ T5323] stack backtrace: [ 74.184543][ T5323] CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 74.184559][ T5323] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 74.184566][ T5323] Call Trace: [ 74.184574][ T5323] [ 74.184580][ T5323] dump_stack_lvl+0xe8/0x150 [ 74.184599][ T5323] print_deadlock_bug+0x279/0x290 [ 74.184615][ T5323] __lock_acquire+0x253f/0x2cf0 [ 74.184629][ T5323] ? __queue_work+0x1a1/0xf90 [ 74.184644][ T5323] ? udf_free_blocks+0xaaf/0x1940 [ 74.184656][ T5323] lock_acquire+0x106/0x330 [ 74.184667][ T5323] ? udf_free_blocks+0xaaf/0x1940 [ 74.184681][ T5323] __mutex_lock+0x19f/0x1300 [ 74.184752][ T5323] ? udf_free_blocks+0xaaf/0x1940 [ 74.184763][ T5323] ? __lock_acquire+0x6b5/0x2cf0 [ 74.184775][ T5323] ? udf_free_blocks+0xaaf/0x1940 [ 74.184786][ T5323] ? __pfx___mutex_lock+0x10/0x10 [ 74.184801][ T5323] ? folio_mark_accessed+0x442/0x8c0 [ 74.184813][ T5323] ? fs_reclaim_acquire+0x7c/0x100 [ 74.184829][ T5323] ? fs_reclaim_acquire+0x7c/0x100 [ 74.184845][ T5323] udf_free_blocks+0xaaf/0x1940 [ 74.184859][ T5323] ? bdev_getblk+0x582/0x6e0 [ 74.184872][ T5323] ? udf_get_fileshortad+0x6e/0x1b0 [ 74.184883][ T5323] ? udf_current_aext+0x698/0xb30 [ 74.184922][ T5323] ? __pfx_udf_free_blocks+0x10/0x10 [ 74.184936][ T5323] ? udf_next_aext+0x447/0x530 [ 74.184953][ T5323] udf_delete_aext+0x4fb/0xbd0 [ 74.184974][ T5323] ? __pfx_udf_delete_aext+0x10/0x10 [ 74.184983][ T5323] ? udf_next_aext+0x44e/0x530 [ 74.184995][ T5323] udf_prealloc_blocks+0xbd3/0x1130 [ 74.185007][ T5323] ? bdev_getblk+0x582/0x6e0 [ 74.185024][ T5323] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 74.185038][ T5323] ? udf_map_block+0x15ca/0x4330 [ 74.185052][ T5323] udf_map_block+0x1e8a/0x4330 [ 74.185072][ T5323] ? __pfx_udf_map_block+0x10/0x10 [ 74.185097][ T5323] ? do_raw_spin_unlock+0x4d/0x210 [ 74.185113][ T5323] __udf_get_block+0x52/0x250 [ 74.185126][ T5323] __block_write_begin_int+0x6c6/0x1910 [ 74.185139][ T5323] ? __pfx_udf_get_block+0x10/0x10 [ 74.185148][ T5323] ? __pfx___block_write_begin_int+0x10/0x10 [ 74.185164][ T5323] ? __pfx_udf_get_block+0x10/0x10 [ 74.185176][ T5323] block_write_begin+0x8d/0x120 [ 74.185191][ T5323] ? udf_write_begin+0x92/0x270 [ 74.185203][ T5323] udf_write_begin+0x118/0x270 [ 74.185217][ T5323] generic_perform_write+0x2e2/0x8f0 [ 74.185232][ T5323] ? __pfx_generic_perform_write+0x10/0x10 [ 74.185242][ T5323] ? file_update_time_flags+0x2cb/0x4d0 [ 74.185257][ T5323] ? __generic_file_write_iter+0xf9/0x230 [ 74.185266][ T5323] ? udf_file_write_iter+0x1a3/0x6b0 [ 74.185278][ T5323] udf_file_write_iter+0x2ca/0x6b0 [ 74.185291][ T5323] iter_file_splice_write+0x99b/0x1100 [ 74.185309][ T5323] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.185323][ T5323] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.185335][ T5323] direct_splice_actor+0x101/0x160 [ 74.185348][ T5323] splice_direct_to_actor+0x53a/0xc70 [ 74.185362][ T5323] ? __pfx_direct_splice_actor+0x10/0x10 [ 74.185376][ T5323] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 74.185388][ T5323] do_splice_direct+0x195/0x290 [ 74.185396][ T5323] ? __pfx_do_splice_direct+0x10/0x10 [ 74.185403][ T5323] ? common_file_perm+0x1b4/0x220 [ 74.185447][ T5323] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 74.185461][ T5323] ? rw_verify_area+0x255/0x4d0 [ 74.185476][ T5323] do_sendfile+0x535/0x7c0 [ 74.185490][ T5323] ? __pfx_do_sendfile+0x10/0x10 [ 74.185501][ T5323] ? __se_sys_futex+0x3a8/0x450 [ 74.185515][ T5323] __se_sys_sendfile64+0x144/0x1a0 [ 74.185532][ T5323] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 74.185545][ T5323] do_syscall_64+0xe2/0xf80 [ 74.185577][ T5323] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.185588][ T5323] ? trace_irq_disable+0x37/0x100 [ 74.185603][ T5323] ? clear_bhb_loop+0x60/0xb0 [ 74.185615][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.185625][ T5323] RIP: 0033:0x7f4d8c39acb9 [ 74.185637][ T5323] 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 [ 74.185646][ T5323] RSP: 002b:00007f4d8d1e0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 74.185659][ T5323] RAX: ffffffffffffffda RBX: 00007f4d8c616090 RCX: 00007f4d8c39acb9 [ 74.185666][ T5323] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 [ 74.185672][ T5323] RBP: 00007f4d8c408bf7 R08: 0000000000000000 R09: 0000000000000000 [ 74.185678][ T5323] R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 [ 74.185684][ T5323] R13: 00007f4d8c616128 R14: 00007f4d8c616090 R15: 00007ffe843d0da8 [ 74.185696][ T5323] [ 74.527394][ T5321] PM: hibernation: Basic memory bitmaps freed [ 75.694873][ T5303] Bluetooth: hci0: command tx timeout [ 76.256411][ T1316] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.259153][ T1316] ieee802154 phy1 wpan1: encryption failed: -22 [ 77.775050][ T5303] Bluetooth: hci0: command tx timeout [ 79.855331][ T5303] Bluetooth: hci0: command tx timeout