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 = syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2) ioctl$FE_SET_PROPERTY(r1, 0x40106f52, &(0x7f0000000000)={0x1, &(0x7f00000000c0)}) r2 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r3 = open(&(0x7f0000000080)='./bus\x00', 0x107382, 0x1d0) ftruncate(r3, 0x2007ffb) sendfile(r2, r3, 0x0, 0x1000000201005) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) mkdir(&(0x7f0000001c00)='./file0\x00', 0x0) [ 85.059491][ T5316] loop0: detected capacity change from 0 to 2048 [ 85.101694][ T5316] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 85.129887][ T5316] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 85.145760][ T5316] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 85.156467][ T5316] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 85.187806][ T24] audit: type=1800 audit(1770954563.249:2): pid=5316 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 [ 85.260018][ T5317] i2c i2c-1: dtv_property_process_set: SET cmd 0x00000000 undefined [ 85.284451][ T5293] Bluetooth: hci0: command tx timeout [ 85.372726][ T5316] [ 85.374108][ T5316] ============================================ [ 85.377186][ T5316] WARNING: possible recursive locking detected [ 85.379815][ T5316] syzkaller #0 Not tainted [ 85.381792][ T5316] -------------------------------------------- [ 85.384452][ T5316] syz.0.0/5316 is trying to acquire lock: [ 85.386999][ T5316] ffff888041001d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 85.391394][ T5316] [ 85.391394][ T5316] but task is already holding lock: [ 85.394612][ T5316] ffff888041001d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 85.399246][ T5316] [ 85.399246][ T5316] other info that might help us debug this: [ 85.402922][ T5316] Possible unsafe locking scenario: [ 85.402922][ T5316] [ 85.406106][ T5316] CPU0 [ 85.407634][ T5316] ---- [ 85.409175][ T5316] lock(&sbi->s_alloc_mutex); [ 85.411363][ T5316] lock(&sbi->s_alloc_mutex); [ 85.413545][ T5316] [ 85.413545][ T5316] *** DEADLOCK *** [ 85.413545][ T5316] [ 85.417090][ T5316] May be due to missing lock nesting notation [ 85.417090][ T5316] [ 85.420684][ T5316] 4 locks held by syz.0.0/5316: [ 85.422742][ T5316] #0: ffff888012746420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 85.426959][ T5316] #1: ffff8880479e7b70 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 85.431647][ T5316] #2: ffff8880479e79a0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 85.435759][ T5316] #3: ffff888041001d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 85.440194][ T5316] [ 85.440194][ T5316] stack backtrace: [ 85.442607][ T5316] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.442622][ T5316] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.442631][ T5316] Call Trace: [ 85.442640][ T5316] [ 85.442647][ T5316] dump_stack_lvl+0xe8/0x150 [ 85.442669][ T5316] print_deadlock_bug+0x279/0x290 [ 85.442685][ T5316] __lock_acquire+0x253f/0x2cf0 [ 85.442698][ T5316] ? __pfx___schedule+0x10/0x10 [ 85.442774][ T5316] ? __queue_work+0x1a1/0xf90 [ 85.442791][ T5316] ? udf_free_blocks+0xaaf/0x1940 [ 85.442808][ T5316] lock_acquire+0x106/0x330 [ 85.442819][ T5316] ? udf_free_blocks+0xaaf/0x1940 [ 85.442834][ T5316] __mutex_lock+0x19f/0x1300 [ 85.442846][ T5316] ? udf_free_blocks+0xaaf/0x1940 [ 85.442859][ T5316] ? lockdep_unlock+0x5d/0xd0 [ 85.442869][ T5316] ? __lock_acquire+0x146e/0x2cf0 [ 85.442882][ T5316] ? udf_free_blocks+0xaaf/0x1940 [ 85.442896][ T5316] ? __pfx___mutex_lock+0x10/0x10 [ 85.442907][ T5316] ? fs_reclaim_acquire+0x7c/0x100 [ 85.442921][ T5316] ? fs_reclaim_acquire+0x7c/0x100 [ 85.442933][ T5316] udf_free_blocks+0xaaf/0x1940 [ 85.442947][ T5316] ? bdev_getblk+0x582/0x6e0 [ 85.442960][ T5316] ? udf_get_fileshortad+0x6e/0x1b0 [ 85.442975][ T5316] ? udf_current_aext+0x698/0xb30 [ 85.442986][ T5316] ? __pfx_udf_free_blocks+0x10/0x10 [ 85.443000][ T5316] ? udf_next_aext+0x447/0x530 [ 85.443012][ T5316] udf_delete_aext+0x4fb/0xbd0 [ 85.443024][ T5316] ? __pfx_udf_delete_aext+0x10/0x10 [ 85.443033][ T5316] ? udf_next_aext+0x44e/0x530 [ 85.443046][ T5316] udf_prealloc_blocks+0xbd3/0x1130 [ 85.443061][ T5316] ? bdev_getblk+0x582/0x6e0 [ 85.443075][ T5316] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 85.443091][ T5316] ? udf_map_block+0x15ca/0x4330 [ 85.443102][ T5316] udf_map_block+0x1e8a/0x4330 [ 85.443116][ T5316] ? __pfx_udf_map_block+0x10/0x10 [ 85.443134][ T5316] ? do_raw_spin_unlock+0x4d/0x210 [ 85.443149][ T5316] __udf_get_block+0x52/0x250 [ 85.443160][ T5316] __block_write_begin_int+0x6c6/0x1910 [ 85.443176][ T5316] ? __pfx_udf_get_block+0x10/0x10 [ 85.443186][ T5316] ? __pfx___block_write_begin_int+0x10/0x10 [ 85.443201][ T5316] ? __pfx_udf_get_block+0x10/0x10 [ 85.443210][ T5316] block_write_begin+0x8d/0x120 [ 85.443223][ T5316] ? udf_write_begin+0x92/0x270 [ 85.443231][ T5316] udf_write_begin+0x118/0x270 [ 85.443241][ T5316] generic_perform_write+0x2e2/0x8f0 [ 85.443259][ T5316] ? __pfx_generic_perform_write+0x10/0x10 [ 85.443273][ T5316] ? generic_file_direct_write+0x385/0x3e0 [ 85.443296][ T5316] __generic_file_write_iter+0x1ae/0x230 [ 85.443313][ T5316] udf_file_write_iter+0x2ca/0x6b0 [ 85.443332][ T5316] iter_file_splice_write+0x99b/0x1100 [ 85.443348][ T5316] ? __pfx_iter_file_splice_write+0x10/0x10 [ 85.443362][ T5316] ? __pfx_iter_file_splice_write+0x10/0x10 [ 85.443373][ T5316] direct_splice_actor+0x101/0x160 [ 85.443382][ T5316] splice_direct_to_actor+0x53a/0xc70 [ 85.443394][ T5316] ? __pfx_direct_splice_actor+0x10/0x10 [ 85.443406][ T5316] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 85.443418][ T5316] do_splice_direct+0x195/0x290 [ 85.443427][ T5316] ? __pfx_do_splice_direct+0x10/0x10 [ 85.443437][ T5316] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 85.443448][ T5316] ? rw_verify_area+0x255/0x4d0 [ 85.443460][ T5316] do_sendfile+0x535/0x7d0 [ 85.443477][ T5316] ? __pfx_do_sendfile+0x10/0x10 [ 85.443493][ T5316] ? __se_sys_futex+0x3a8/0x450 [ 85.443504][ T5316] __se_sys_sendfile64+0x144/0x1a0 [ 85.443519][ T5316] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 85.443535][ T5316] do_syscall_64+0x14d/0xf80 [ 85.443546][ T5316] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.443558][ T5316] ? trace_irq_disable+0x37/0x100 [ 85.443570][ T5316] ? clear_bhb_loop+0x40/0x90 [ 85.443588][ T5316] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.443601][ T5316] RIP: 0033:0x7fd2bb79bf79 [ 85.443613][ T5316] 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 [ 85.443648][ T5316] RSP: 002b:00007fd2bc723028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 85.443691][ T5316] RAX: ffffffffffffffda RBX: 00007fd2bba15fa0 RCX: 00007fd2bb79bf79 [ 85.443700][ T5316] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 85.443707][ T5316] RBP: 00007fd2bb8327e0 R08: 0000000000000000 R09: 0000000000000000 [ 85.443714][ T5316] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 85.443721][ T5316] R13: 00007fd2bba16038 R14: 00007fd2bba15fa0 R15: 00007ffd05def4f8 [ 85.443734][ T5316] [ 87.364362][ T5293] Bluetooth: hci0: command tx timeout [ 89.445010][ T5293] Bluetooth: hci0: command tx timeout