program: r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000002000), 0x2, 0x0) syz_mount_image$fuse(&(0x7f0000002040), &(0x7f0000002080)='./file0\x00', 0x0, &(0x7f0000000080)=ANY=[@ANYBLOB='fd=', @ANYRESHEX=r0, @ANYBLOB=',rootmode=00000\x00\x00\x00\x00\x00\x00\x00W0000040000,userohd=', @ANYRESDEC=0x0, @ANYBLOB=',group_id=', @ANYRESDEC=0x0, @ANYBLOB=',\x00'], 0x3e, 0x0, 0x0) syz_fuse_handle_req(r0, 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0x2000, &(0x7f0000000700)={&(0x7f0000000180)={0x50}, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}) syz_fuse_handle_req(r0, 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", 0x2000, &(0x7f0000001e40)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, &(0x7f0000000e80)={0x20}, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}) bpf$MAP_CREATE(0x1900000000000000, &(0x7f0000000040)=ANY=[@ANYBLOB="1b00000000000000000000000020"], 0x48) syz_mount_image$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, 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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', 0x107382, 0x1d0) ftruncate(r3, 0x2007ffb) sendfile(r2, r3, 0x0, 0x1000000201005) open(&(0x7f0000000180)='./bus\x00', 0x14937e, 0x111) [ 75.320605][ T5294] Bluetooth: hci0: command tx timeout [ 75.400936][ T5314] fuse: Invalid rootmode [ 75.445113][ T5314] loop0: detected capacity change from 0 to 2048 [ 75.465063][ T5314] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 75.482796][ T5314] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 75.501305][ T5314] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 75.507588][ T5314] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 75.538385][ T24] audit: type=1800 audit(1771515584.667:2): pid=5314 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 [ 75.703374][ T5314] [ 75.704496][ T5314] ============================================ [ 75.706968][ T5314] WARNING: possible recursive locking detected [ 75.709533][ T5314] syzkaller #0 Not tainted [ 75.711516][ T5314] -------------------------------------------- [ 75.714176][ T5314] syz.0.0/5314 is trying to acquire lock: [ 75.716645][ T5314] ffff88801eedfd28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0xaaf/0x1940 [ 75.721151][ T5314] [ 75.721151][ T5314] but task is already holding lock: [ 75.724388][ T5314] ffff88801eedfd28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 75.728686][ T5314] [ 75.728686][ T5314] other info that might help us debug this: [ 75.732107][ T5314] Possible unsafe locking scenario: [ 75.732107][ T5314] [ 75.735233][ T5314] CPU0 [ 75.736722][ T5314] ---- [ 75.738174][ T5314] lock(&sbi->s_alloc_mutex); [ 75.740149][ T5314] lock(&sbi->s_alloc_mutex); [ 75.742138][ T5314] [ 75.742138][ T5314] *** DEADLOCK *** [ 75.742138][ T5314] [ 75.745472][ T5314] May be due to missing lock nesting notation [ 75.745472][ T5314] [ 75.749026][ T5314] 4 locks held by syz.0.0/5314: [ 75.751249][ T5314] #0: ffff888011a6a420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 75.755357][ T5314] #1: ffff888011a1bb70 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: udf_file_write_iter+0x6f/0x6b0 [ 75.759954][ T5314] #2: ffff888011a1b9a0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x2a4/0x4330 [ 75.764062][ T5314] #3: ffff88801eedfd28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8f6/0x1130 [ 75.768330][ T5314] [ 75.768330][ T5314] stack backtrace: [ 75.770736][ T5314] CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 75.770753][ T5314] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 75.770763][ T5314] Call Trace: [ 75.770771][ T5314] [ 75.770779][ T5314] dump_stack_lvl+0xe8/0x150 [ 75.770879][ T5314] print_deadlock_bug+0x279/0x290 [ 75.770977][ T5314] __lock_acquire+0x253f/0x2cf0 [ 75.770995][ T5314] ? __pfx___schedule+0x10/0x10 [ 75.771076][ T5314] ? __queue_work+0x1a1/0x1020 [ 75.771100][ T5314] lock_acquire+0xf0/0x2e0 [ 75.771115][ T5314] ? udf_free_blocks+0xaaf/0x1940 [ 75.771136][ T5314] __mutex_lock+0x19f/0x1300 [ 75.771153][ T5314] ? udf_free_blocks+0xaaf/0x1940 [ 75.771170][ T5314] ? __lock_acquire+0x6b5/0x2cf0 [ 75.771186][ T5314] ? udf_free_blocks+0xaaf/0x1940 [ 75.771204][ T5314] ? __pfx___mutex_lock+0x10/0x10 [ 75.771221][ T5314] ? folio_mark_accessed+0x442/0x8c0 [ 75.771254][ T5314] ? __lock_acquire+0x6b5/0x2cf0 [ 75.771273][ T5314] udf_free_blocks+0xaaf/0x1940 [ 75.771292][ T5314] ? bdev_getblk+0x582/0x6e0 [ 75.771311][ T5314] ? udf_get_fileshortad+0x6e/0x1b0 [ 75.771329][ T5314] ? udf_current_aext+0x698/0xb30 [ 75.771348][ T5314] ? __pfx_udf_free_blocks+0x10/0x10 [ 75.771367][ T5314] ? udf_next_aext+0x447/0x530 [ 75.771389][ T5314] udf_delete_aext+0x4fb/0xbd0 [ 75.771411][ T5314] ? __pfx_udf_delete_aext+0x10/0x10 [ 75.771429][ T5314] ? udf_next_aext+0x44e/0x530 [ 75.771451][ T5314] udf_prealloc_blocks+0xbd3/0x1130 [ 75.771469][ T5314] ? bdev_getblk+0x582/0x6e0 [ 75.771490][ T5314] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 75.771509][ T5314] ? udf_map_block+0x15ca/0x4330 [ 75.771527][ T5314] udf_map_block+0x1e8a/0x4330 [ 75.771550][ T5314] ? __pfx_udf_map_block+0x10/0x10 [ 75.771572][ T5314] ? rcu_is_watching+0x15/0xb0 [ 75.771595][ T5314] ? do_raw_spin_unlock+0x4d/0x210 [ 75.771607][ T5314] __udf_get_block+0x52/0x250 [ 75.771625][ T5314] __block_write_begin_int+0x6c6/0x1910 [ 75.771640][ T5314] ? __pfx_udf_get_block+0x10/0x10 [ 75.771657][ T5314] ? __pfx___block_write_begin_int+0x10/0x10 [ 75.771670][ T5314] ? __pfx_udf_get_block+0x10/0x10 [ 75.771685][ T5314] block_write_begin+0x8d/0x120 [ 75.771695][ T5314] ? udf_write_begin+0x92/0x270 [ 75.771711][ T5314] udf_write_begin+0x118/0x270 [ 75.771729][ T5314] generic_perform_write+0x2e2/0x8f0 [ 75.771744][ T5314] ? __pfx_generic_perform_write+0x10/0x10 [ 75.771757][ T5314] ? generic_file_direct_write+0x385/0x3e0 [ 75.771770][ T5314] __generic_file_write_iter+0x1ae/0x230 [ 75.771783][ T5314] udf_file_write_iter+0x2ca/0x6b0 [ 75.771801][ T5314] iter_file_splice_write+0x99b/0x1100 [ 75.771821][ T5314] ? __pfx_iter_file_splice_write+0x10/0x10 [ 75.771839][ T5314] ? __pfx_iter_file_splice_write+0x10/0x10 [ 75.771853][ T5314] direct_splice_actor+0x101/0x160 [ 75.771868][ T5314] splice_direct_to_actor+0x53a/0xc70 [ 75.771884][ T5314] ? __pfx_direct_splice_actor+0x10/0x10 [ 75.771913][ T5314] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 75.771930][ T5314] do_splice_direct+0x195/0x290 [ 75.771945][ T5314] ? __pfx_do_splice_direct+0x10/0x10 [ 75.771959][ T5314] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 75.771976][ T5314] ? rw_verify_area+0x255/0x4d0 [ 75.771993][ T5314] do_sendfile+0x535/0x7d0 [ 75.772008][ T5314] ? __pfx_do_sendfile+0x10/0x10 [ 75.772022][ T5314] ? __se_sys_futex+0x3a8/0x450 [ 75.772039][ T5314] __se_sys_sendfile64+0x144/0x1a0 [ 75.772051][ T5314] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 75.772066][ T5314] do_syscall_64+0x14d/0xf80 [ 75.772083][ T5314] ? trace_irq_disable+0x3b/0x150 [ 75.772101][ T5314] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.772114][ T5314] ? clear_bhb_loop+0x40/0x90 [ 75.772127][ T5314] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.772140][ T5314] RIP: 0033:0x7f42fb39c629 [ 75.772195][ T5314] 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 [ 75.772212][ T5314] RSP: 002b:00007f42fc2a3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 75.772225][ T5314] RAX: ffffffffffffffda RBX: 00007f42fb615fa0 RCX: 00007f42fb39c629 [ 75.772234][ T5314] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 [ 75.772239][ T5314] RBP: 00007f42fb432b39 R08: 0000000000000000 R09: 0000000000000000 [ 75.772245][ T5314] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 75.772252][ T5314] R13: 00007f42fb616038 R14: 00007f42fb615fa0 R15: 00007fffb80d71c8 [ 75.772265][ T5314] [ 77.360381][ T5294] Bluetooth: hci0: command tx timeout [ 79.440680][ T5294] Bluetooth: hci0: command tx timeout [ 81.520237][ T5294] Bluetooth: hci0: command tx timeout [ 81.602470][ T1313] ieee802154 phy0 wpan0: encryption failed: -22 [ 81.605217][ T1313] ieee802154 phy1 wpan1: encryption failed: -22