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) ftruncate(r2, 0x2007ffb) sendfile(r1, r2, 0x0, 0x1000000201005) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000240)='blkio.throttle.io_serviced\x00', 0x275a, 0x0) [ 74.252362][ T5294] Bluetooth: hci0: command tx timeout [ 74.349506][ T5315] loop0: detected capacity change from 0 to 2048 [ 74.367836][ T5315] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 74.402582][ T5315] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 74.420442][ T5315] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 74.440490][ T5315] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 74.453677][ T25] audit: type=1800 audit(1771096498.355:2): pid=5315 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 [ 74.679858][ T5315] [ 74.680990][ T5315] ============================================ [ 74.683612][ T5315] WARNING: possible recursive locking detected [ 74.686282][ T5315] syzkaller #0 Not tainted [ 74.688234][ T5315] -------------------------------------------- [ 74.690903][ T5315] syz.0.0/5315 is trying to acquire lock: [ 74.693384][ T5315] ffff888033ceb928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 74.697531][ T5315] [ 74.697531][ T5315] but task is already holding lock: [ 74.700476][ T5315] ffff888033ceb928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 74.704284][ T5315] [ 74.704284][ T5315] other info that might help us debug this: [ 74.707836][ T5315] Possible unsafe locking scenario: [ 74.707836][ T5315] [ 74.711048][ T5315] CPU0 [ 74.712512][ T5315] ---- [ 74.713972][ T5315] lock(&sbi->s_alloc_mutex); [ 74.716050][ T5315] lock(&sbi->s_alloc_mutex); [ 74.718155][ T5315] [ 74.718155][ T5315] *** DEADLOCK *** [ 74.718155][ T5315] [ 74.721641][ T5315] May be due to missing lock nesting notation [ 74.721641][ T5315] [ 74.725311][ T5315] 4 locks held by syz.0.0/5315: [ 74.727502][ T5315] #0: ffff8880128f2420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 74.731753][ T5315] #1: ffff88805588fb70 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 74.736287][ T5315] #2: ffff88805588f9a0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 74.740235][ T5315] #3: ffff888033ceb928 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 74.744538][ T5315] [ 74.744538][ T5315] stack backtrace: [ 74.747093][ T5315] CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 74.747108][ T5315] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 74.747116][ T5315] Call Trace: [ 74.747123][ T5315] [ 74.747128][ T5315] dump_stack_lvl+0xe8/0x150 [ 74.747147][ T5315] print_deadlock_bug+0x279/0x290 [ 74.747165][ T5315] __lock_acquire+0x253f/0x2cf0 [ 74.747180][ T5315] ? __pfx___schedule+0x10/0x10 [ 74.747238][ T5315] ? __queue_work+0x1a1/0x1020 [ 74.747258][ T5315] lock_acquire+0xf0/0x2e0 [ 74.747271][ T5315] ? udf_free_blocks+0xaaf/0x1940 [ 74.747285][ T5315] __mutex_lock+0x19f/0x1300 [ 74.747295][ T5315] ? udf_free_blocks+0xaaf/0x1940 [ 74.747307][ T5315] ? __lock_acquire+0x6b5/0x2cf0 [ 74.747321][ T5315] ? udf_free_blocks+0xaaf/0x1940 [ 74.747333][ T5315] ? __pfx___mutex_lock+0x10/0x10 [ 74.747343][ T5315] ? folio_mark_accessed+0x442/0x8c0 [ 74.747363][ T5315] ? __lock_acquire+0x6b5/0x2cf0 [ 74.747378][ T5315] udf_free_blocks+0xaaf/0x1940 [ 74.747392][ T5315] ? bdev_getblk+0x582/0x6e0 [ 74.747408][ T5315] ? udf_get_fileshortad+0x6e/0x1b0 [ 74.747419][ T5315] ? udf_current_aext+0x698/0xb30 [ 74.747432][ T5315] ? __pfx_udf_free_blocks+0x10/0x10 [ 74.747442][ T5315] ? udf_next_aext+0x447/0x530 [ 74.747459][ T5315] udf_delete_aext+0x4fb/0xbd0 [ 74.747475][ T5315] ? __pfx_udf_delete_aext+0x10/0x10 [ 74.747488][ T5315] ? udf_next_aext+0x44e/0x530 [ 74.747504][ T5315] udf_prealloc_blocks+0xbd3/0x1130 [ 74.747516][ T5315] ? bdev_getblk+0x582/0x6e0 [ 74.747533][ T5315] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 74.747546][ T5315] ? udf_map_block+0x15ca/0x4330 [ 74.747559][ T5315] udf_map_block+0x1e8a/0x4330 [ 74.747575][ T5315] ? __pfx_udf_map_block+0x10/0x10 [ 74.747589][ T5315] ? rcu_is_watching+0x15/0xb0 [ 74.747608][ T5315] ? do_raw_spin_unlock+0x4d/0x210 [ 74.747618][ T5315] __udf_get_block+0x52/0x250 [ 74.747631][ T5315] __block_write_begin_int+0x6c6/0x1910 [ 74.747646][ T5315] ? __pfx_udf_get_block+0x10/0x10 [ 74.747655][ T5315] ? __pfx___block_write_begin_int+0x10/0x10 [ 74.747667][ T5315] ? __pfx_udf_get_block+0x10/0x10 [ 74.747675][ T5315] block_write_begin+0x8d/0x120 [ 74.747693][ T5315] ? udf_write_begin+0x92/0x270 [ 74.747704][ T5315] udf_write_begin+0x118/0x270 [ 74.747715][ T5315] generic_perform_write+0x2e2/0x8f0 [ 74.747735][ T5315] ? __pfx_generic_perform_write+0x10/0x10 [ 74.747753][ T5315] ? generic_file_direct_write+0x385/0x3e0 [ 74.747772][ T5315] __generic_file_write_iter+0x1ae/0x230 [ 74.747790][ T5315] udf_file_write_iter+0x2ca/0x6b0 [ 74.747803][ T5315] iter_file_splice_write+0x99b/0x1100 [ 74.747822][ T5315] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.747836][ T5315] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.747846][ T5315] direct_splice_actor+0x101/0x160 [ 74.747856][ T5315] splice_direct_to_actor+0x53a/0xc70 [ 74.747868][ T5315] ? __pfx_direct_splice_actor+0x10/0x10 [ 74.747879][ T5315] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 74.747890][ T5315] do_splice_direct+0x195/0x290 [ 74.747901][ T5315] ? __pfx_do_splice_direct+0x10/0x10 [ 74.747912][ T5315] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 74.747924][ T5315] ? rw_verify_area+0x255/0x4d0 [ 74.747937][ T5315] do_sendfile+0x535/0x7d0 [ 74.747950][ T5315] ? __pfx_do_sendfile+0x10/0x10 [ 74.747962][ T5315] ? __se_sys_futex+0x3a8/0x450 [ 74.747975][ T5315] __se_sys_sendfile64+0x144/0x1a0 [ 74.747985][ T5315] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 74.747995][ T5315] do_syscall_64+0x14d/0xf80 [ 74.748006][ T5315] ? trace_irq_disable+0x3b/0x150 [ 74.748019][ T5315] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.748029][ T5315] ? clear_bhb_loop+0x40/0x90 [ 74.748039][ T5315] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.748049][ T5315] RIP: 0033:0x7fcbb499bf79 [ 74.748061][ T5315] 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 [ 74.748069][ T5315] RSP: 002b:00007fcbb57ef028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 74.748082][ T5315] RAX: ffffffffffffffda RBX: 00007fcbb4c15fa0 RCX: 00007fcbb499bf79 [ 74.748089][ T5315] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 74.748095][ T5315] RBP: 00007fcbb4a327e0 R08: 0000000000000000 R09: 0000000000000000 [ 74.748102][ T5315] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 74.748108][ T5315] R13: 00007fcbb4c16038 R14: 00007fcbb4c15fa0 R15: 00007fff96975fe8 [ 74.748119][ T5315] [ 76.268868][ T5294] Bluetooth: hci0: command tx timeout [ 78.349432][ T5294] Bluetooth: hci0: command tx timeout [ 80.428534][ T5294] Bluetooth: hci0: command tx timeout