program: syz_mount_image$udf(&(0x7f0000000180), &(0x7f0000000100)='./bus\x00', 0x1014494, &(0x7f00000002c0)={[{@iocharset={'iocharset', 0x3d, 'iso8859-4'}}, {@partition={'partition', 0x3d, 0x6}}, {@gid_forget}, {@session={'session', 0x3d, 0xfe8}}, {@noadinicb}, {@anchor}, {@uid_forget}]}, 0xfe, 0xc24, &(0x7f00000005c0)="$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") r0 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) ftruncate(r0, 0x2007ffc) r1 = openat$tun(0xffffffffffffff9c, &(0x7f0000000580), 0x62a01, 0x0) r2 = bpf$BPF_BTF_LOAD(0x12, &(0x7f0000000140)={&(0x7f0000000040)=ANY=[@ANYBLOB="9feb01001800000000000000180000001800000004000000020000000100000c02000000000000000000000d0000000000005f"], 0x0, 0x34}, 0x20) bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f00000002c0)={0xa21b773aa53998cc, 0x3, &(0x7f0000000100)=@framed, &(0x7f0000000000)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, 0x0, r2, 0x8, &(0x7f00000000c0)={0x0, 0x801}, 0x8}, 0x94) bpf$MAP_CREATE(0x0, &(0x7f0000000180)=@base={0x1, 0x5, 0x10000, 0x3, 0x0, 0x1, 0xfffffff8, '\x00', 0x0, 0xffffffffffffffff, 0x4, 0x4}, 0x48) ioctl$TUNSETIFF(r1, 0x400454ca, 0x0) sendfile(r0, r0, 0x0, 0x800000009) r3 = open(&(0x7f0000000000)='./bus\x00', 0x60142, 0x0) r4 = open(&(0x7f00000000c0)='./bus\x00', 0x181102, 0x0) ftruncate(r4, 0x2007ffb) sendfile(r3, r4, 0x0, 0x1000000201005) ioctl$BSG_SET_RESERVED_SIZE(r3, 0x2275, &(0x7f0000000080)=0x1) r5 = io_uring_setup(0x87d, &(0x7f0000000440)={0x0, 0x8ad4, 0x1002, 0x2, 0x2e9}) io_uring_enter(r5, 0x4d1, 0xc923, 0x1, 0x0, 0x0) io_uring_register$IORING_REGISTER_BUFFERS2(r5, 0xf, 0x0, 0x0) open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0) ioctl$sock_proto_private(0xffffffffffffffff, 0x8b19, &(0x7f0000000080)) [ 92.841242][ T5333] loop0: detected capacity change from 0 to 2048 [ 92.846525][ T5333] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 92.855209][ T4656] Bluetooth: hci0: command tx timeout [ 92.866120][ T110] cfg80211: failed to load regulatory.db [ 92.956621][ T5333] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 92.962325][ T5333] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 92.970932][ T5333] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 93.028879][ T24] audit: type=1800 audit(1780653065.774:2): pid=5333 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 [ 93.427549][ T5333] [ 93.428758][ T5333] ============================================ [ 93.431353][ T5333] WARNING: possible recursive locking detected [ 93.433946][ T5333] syzkaller #0 Not tainted [ 93.435822][ T5333] -------------------------------------------- [ 93.438426][ T5333] syz.0.0/5333 is trying to acquire lock: [ 93.440835][ T5333] ffff888038c5ad20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 93.444934][ T5333] [ 93.444934][ T5333] but task is already holding lock: [ 93.448262][ T5333] ffff888038c5ad20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_new_block+0x104a/0x1c70 [ 93.452160][ T5333] [ 93.452160][ T5333] other info that might help us debug this: [ 93.455474][ T5333] Possible unsafe locking scenario: [ 93.455474][ T5333] [ 93.458709][ T5333] CPU0 [ 93.460192][ T5333] ---- [ 93.461623][ T5333] lock(&sbi->s_alloc_mutex); [ 93.463712][ T5333] lock(&sbi->s_alloc_mutex); [ 93.465830][ T5333] [ 93.465830][ T5333] *** DEADLOCK *** [ 93.465830][ T5333] [ 93.469232][ T5333] May be due to missing lock nesting notation [ 93.469232][ T5333] [ 93.472747][ T5333] 4 locks held by syz.0.0/5333: [ 93.474882][ T5333] #0: ffff8880394a8410 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 93.479046][ T5333] #1: ffff888047d03c90 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 93.483623][ T5333] #2: ffff888047d03a70 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x42d0 [ 93.487849][ T5333] #3: ffff888038c5ad20 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_new_block+0x104a/0x1c70 [ 93.492069][ T5333] [ 93.492069][ T5333] stack backtrace: [ 93.494531][ T5333] CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 93.494545][ T5333] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 93.494550][ T5333] Call Trace: [ 93.494554][ T5333] [ 93.494558][ T5333] dump_stack_lvl+0xe8/0x150 [ 93.494569][ T5333] print_deadlock_bug+0x279/0x290 [ 93.494583][ T5333] __lock_acquire+0x253f/0x2cf0 [ 93.494593][ T5333] ? do_raw_spin_unlock+0x4d/0x210 [ 93.494607][ T5333] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 93.494665][ T5333] ? try_to_wake_up+0x7f2/0x1380 [ 93.494682][ T5333] ? udf_free_blocks+0xaaf/0x1940 [ 93.494692][ T5333] lock_acquire+0x106/0x350 [ 93.494702][ T5333] ? udf_free_blocks+0xaaf/0x1940 [ 93.494714][ T5333] __mutex_lock+0x1a3/0x1550 [ 93.494724][ T5333] ? udf_free_blocks+0xaaf/0x1940 [ 93.494734][ T5333] ? __lock_acquire+0x6b5/0x2cf0 [ 93.494745][ T5333] ? do_raw_spin_lock+0x12b/0x2f0 [ 93.494758][ T5333] ? udf_free_blocks+0xaaf/0x1940 [ 93.494767][ T5333] ? __pfx___mutex_lock+0x10/0x10 [ 93.494776][ T5333] ? folio_mark_accessed+0x42e/0x8c0 [ 93.494791][ T5333] ? fs_reclaim_acquire+0x7c/0x100 [ 93.494805][ T5333] ? fs_reclaim_acquire+0x7c/0x100 [ 93.494816][ T5333] udf_free_blocks+0xaaf/0x1940 [ 93.494826][ T5333] ? bdev_getblk+0x582/0x6e0 [ 93.494841][ T5333] ? udf_get_fileshortad+0x6e/0x1b0 [ 93.494857][ T5333] ? udf_current_aext+0x698/0xb30 [ 93.494869][ T5333] ? __pfx_udf_free_blocks+0x10/0x10 [ 93.494879][ T5333] ? udf_next_aext+0x447/0x530 [ 93.494893][ T5333] udf_delete_aext+0x4fb/0xbe0 [ 93.494906][ T5333] ? __pfx_udf_delete_aext+0x10/0x10 [ 93.494916][ T5333] ? udf_next_aext+0x447/0x530 [ 93.494929][ T5333] udf_new_block+0x149e/0x1c70 [ 93.494942][ T5333] ? bdev_getblk+0x582/0x6e0 [ 93.494957][ T5333] ? __pfx_udf_new_block+0x10/0x10 [ 93.494972][ T5333] udf_map_block+0x1340/0x42d0 [ 93.494982][ T5333] ? filemap_get_folios_tag+0x118/0x720 [ 93.495000][ T5333] ? __pfx_udf_map_block+0x10/0x10 [ 93.495020][ T5333] ? do_raw_spin_unlock+0x4d/0x210 [ 93.495033][ T5333] __udf_get_block+0x52/0x250 [ 93.495045][ T5333] __block_write_begin_int+0x6c6/0x1910 [ 93.495063][ T5333] ? __pfx_udf_get_block+0x10/0x10 [ 93.495074][ T5333] ? __pfx___block_write_begin_int+0x10/0x10 [ 93.495090][ T5333] ? __pfx_udf_get_block+0x10/0x10 [ 93.495100][ T5333] block_write_begin+0x8d/0x120 [ 93.495114][ T5333] ? udf_write_begin+0x92/0x270 [ 93.495124][ T5333] udf_write_begin+0x118/0x270 [ 93.495135][ T5333] generic_perform_write+0x2e2/0x8f0 [ 93.495151][ T5333] ? __pfx_generic_perform_write+0x10/0x10 [ 93.495164][ T5333] ? generic_file_direct_write+0x385/0x3e0 [ 93.495179][ T5333] __generic_file_write_iter+0x1ae/0x230 [ 93.495193][ T5333] udf_file_write_iter+0x2ca/0x6b0 [ 93.495205][ T5333] iter_file_splice_write+0x9a1/0x10f0 [ 93.495220][ T5333] ? __pfx_iter_file_splice_write+0x10/0x10 [ 93.495234][ T5333] ? __pfx_iter_file_splice_write+0x10/0x10 [ 93.495244][ T5333] direct_splice_actor+0x101/0x160 [ 93.495254][ T5333] splice_direct_to_actor+0x53a/0xc70 [ 93.495267][ T5333] ? __pfx_direct_splice_actor+0x10/0x10 [ 93.495279][ T5333] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 93.495291][ T5333] do_splice_direct+0x195/0x290 [ 93.495302][ T5333] ? __pfx_do_splice_direct+0x10/0x10 [ 93.495312][ T5333] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 93.495324][ T5333] ? rw_verify_area+0x255/0x4d0 [ 93.495337][ T5333] do_sendfile+0x535/0x7d0 [ 93.495347][ T5333] ? __pfx_do_sendfile+0x10/0x10 [ 93.495354][ T5333] ? __tun_chr_ioctl+0x208/0x1e10 [ 93.495406][ T5333] ? __se_sys_futex+0x3a8/0x450 [ 93.495418][ T5333] __se_sys_sendfile64+0x144/0x1a0 [ 93.495433][ T5333] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 93.495449][ T5333] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.495459][ T5333] do_syscall_64+0x174/0x580 [ 93.495470][ T5333] ? trace_irq_disable+0x3b/0x140 [ 93.495485][ T5333] ? clear_bhb_loop+0x40/0x90 [ 93.495496][ T5333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.495506][ T5333] RIP: 0033:0x7f0e2939ce59 [ 93.495517][ T5333] 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 [ 93.495529][ T5333] RSP: 002b:00007f0e257f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 93.495541][ T5333] RAX: ffffffffffffffda RBX: 00007f0e29615fa0 RCX: 00007f0e2939ce59 [ 93.495547][ T5333] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 93.495553][ T5333] RBP: 00007f0e29432d6f R08: 0000000000000000 R09: 0000000000000000 [ 93.495559][ T5333] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 93.495565][ T5333] R13: 00007f0e29616038 R14: 00007f0e29615fa0 R15: 00007ffe6332a968 [ 93.495575][ T5333] [ 94.892692][ T4656] Bluetooth: hci0: command tx timeout [ 96.972727][ T4656] Bluetooth: hci0: command tx timeout