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) syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000140)={{0x12, 0x1, 0x250, 0x0, 0x0, 0x0, 0x40, 0x6cb, 0x2968, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x24, 0x1, 0x1, 0x2, 0x20, 0x5, [{{0x9, 0x4, 0x0, 0xfe, 0x1, 0x3, 0x1, 0x3, 0x0, {0x9, 0x21, 0x7, 0x1, 0x1, {0x22, 0x9f8}}, {{{0x9, 0x5, 0x81, 0x3, 0x40, 0x1, 0x80, 0xb5}}}}}]}}]}}, 0x0) truncate(&(0x7f00000013c0)='./file1\x00', 0x0) symlink(&(0x7f0000000080)='.\x00', &(0x7f0000000000)='./file0\x00') [ 85.427520][ T4704] Bluetooth: hci0: command tx timeout [ 85.711741][ T5359] loop0: detected capacity change from 0 to 2048 [ 85.717928][ T5359] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 85.748138][ T5359] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 85.762166][ T5359] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 85.781867][ T5359] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 85.853372][ T25] audit: type=1800 audit(1754431789.182:2): pid=5359 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 [ 86.277283][ T5336] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 87.337236][ T5360] [ 87.338548][ T5360] ============================================ [ 87.357195][ T5360] WARNING: possible recursive locking detected [ 87.362046][ T5360] 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 Not tainted [ 87.371009][ T5360] -------------------------------------------- [ 87.373972][ T5360] syz.0.0/5360 is trying to acquire lock: [ 87.386529][ T5360] ffff88803ff79d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0x9e2/0x17f0 [ 87.402743][ T5360] [ 87.402743][ T5360] but task is already holding lock: [ 87.407582][ T5360] ffff88803ff79d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 87.414946][ T5360] [ 87.414946][ T5360] other info that might help us debug this: [ 87.421121][ T5360] Possible unsafe locking scenario: [ 87.421121][ T5360] [ 87.436716][ T5360] CPU0 [ 87.438522][ T5360] ---- [ 87.442534][ T5360] lock(&sbi->s_alloc_mutex); [ 87.445079][ T5360] lock(&sbi->s_alloc_mutex); [ 87.447600][ T5360] [ 87.447600][ T5360] *** DEADLOCK *** [ 87.447600][ T5360] [ 87.466567][ T5360] May be due to missing lock nesting notation [ 87.466567][ T5360] [ 87.472845][ T5360] 4 locks held by syz.0.0/5360: [ 87.475967][ T5360] #0: ffff888011c60428 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 87.486531][ T5360] #1: ffff8880524a15c0 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: udf_file_write_iter+0x6e/0x6c0 [ 87.495044][ T5360] #2: ffff8880524a13f0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x283/0x45f0 [ 87.498894][ T5360] #3: ffff88803ff79d28 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 87.503394][ T5360] [ 87.503394][ T5360] stack backtrace: [ 87.506188][ T5360] CPU: 0 UID: 0 PID: 5360 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 PREEMPT(full) [ 87.506209][ T5360] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 87.506218][ T5360] Call Trace: [ 87.506226][ T5360] [ 87.506232][ T5360] dump_stack_lvl+0x189/0x250 [ 87.506250][ T5360] ? __pfx_dump_stack_lvl+0x10/0x10 [ 87.506266][ T5360] ? __pfx__printk+0x10/0x10 [ 87.506280][ T5360] ? print_lock_name+0xde/0x100 [ 87.506297][ T5360] print_deadlock_bug+0x28b/0x2a0 [ 87.506310][ T5360] validate_chain+0x1a3f/0x2140 [ 87.506332][ T5360] ? __pfx_css_rstat_updated+0x10/0x10 [ 87.506343][ T5360] ? rcu_read_lock_sched_held+0x89/0x100 [ 87.506357][ T5360] ? __pfx_rcu_read_lock_sched_held+0x10/0x10 [ 87.506369][ T5360] __lock_acquire+0xab9/0xd20 [ 87.506388][ T5360] ? udf_free_blocks+0x9e2/0x17f0 [ 87.506402][ T5360] lock_acquire+0x120/0x360 [ 87.506418][ T5360] ? udf_free_blocks+0x9e2/0x17f0 [ 87.506433][ T5360] __mutex_lock+0x187/0x1360 [ 87.506493][ T5360] ? udf_free_blocks+0x9e2/0x17f0 [ 87.506506][ T5360] ? folio_mark_accessed+0x42c/0x8b0 [ 87.506524][ T5360] ? __pfx_folio_mark_accessed+0x10/0x10 [ 87.506539][ T5360] ? udf_free_blocks+0x9e2/0x17f0 [ 87.506552][ T5360] ? __pfx___mutex_lock+0x10/0x10 [ 87.506567][ T5360] ? __pfx___might_resched+0x10/0x10 [ 87.506580][ T5360] ? fs_reclaim_acquire+0x7d/0x100 [ 87.506595][ T5360] udf_free_blocks+0x9e2/0x17f0 [ 87.506609][ T5360] ? udf_get_fileshortad+0x6e/0x1b0 [ 87.506623][ T5360] ? __pfx_udf_free_blocks+0x10/0x10 [ 87.506644][ T5360] udf_delete_aext+0x4df/0xbc0 [ 87.506660][ T5360] ? udf_get_fileshortad+0xcb/0x1b0 [ 87.506675][ T5360] ? __pfx_udf_delete_aext+0x10/0x10 [ 87.506696][ T5360] udf_prealloc_blocks+0xb7e/0x10b0 [ 87.506712][ T5360] ? udf_get_filelongad+0x6e/0x1b0 [ 87.506726][ T5360] ? __pfx_udf_new_block+0x10/0x10 [ 87.506739][ T5360] ? udf_current_aext+0x660/0xad0 [ 87.506758][ T5360] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 87.506776][ T5360] ? udf_map_block+0x1662/0x45f0 [ 87.506794][ T5360] udf_map_block+0x1f70/0x45f0 [ 87.506810][ T5360] ? stack_depot_save_flags+0x40/0x860 [ 87.506833][ T5360] ? percpu_ref_get_many+0x19/0x140 [ 87.506848][ T5360] ? __pfx_udf_map_block+0x10/0x10 [ 87.506866][ T5360] ? percpu_ref_get_many+0x19/0x140 [ 87.506886][ T5360] ? do_raw_spin_lock+0x121/0x290 [ 87.506901][ T5360] ? do_raw_spin_unlock+0x4d/0x240 [ 87.506916][ T5360] __udf_get_block+0x52/0x250 [ 87.506931][ T5360] ? create_empty_buffers+0x465/0x530 [ 87.506951][ T5360] __block_write_begin_int+0x6b5/0x1900 [ 87.506999][ T5360] ? folio_add_lru+0x1b2/0x3d0 [ 87.507013][ T5360] ? __pfx_udf_get_block+0x10/0x10 [ 87.507025][ T5360] ? __pfx___block_write_begin_int+0x10/0x10 [ 87.507040][ T5360] ? __pfx_udf_get_block+0x10/0x10 [ 87.507052][ T5360] block_write_begin+0x8a/0x120 [ 87.507067][ T5360] ? udf_write_begin+0x92/0x270 [ 87.507083][ T5360] udf_write_begin+0x115/0x270 [ 87.507098][ T5360] generic_perform_write+0x2c2/0x900 [ 87.507111][ T5360] ? __pfx_generic_perform_write+0x10/0x10 [ 87.507120][ T5360] ? file_update_time+0x416/0x490 [ 87.507140][ T5360] ? __generic_file_write_iter+0xf9/0x230 [ 87.507150][ T5360] ? udf_file_write_iter+0x1a3/0x6c0 [ 87.507167][ T5360] udf_file_write_iter+0x2d5/0x6c0 [ 87.507181][ T5360] iter_file_splice_write+0x93a/0x1000 [ 87.507202][ T5360] ? __pfx_iter_file_splice_write+0x10/0x10 [ 87.507215][ T5360] ? rcu_read_lock_any_held+0xb3/0x120 [ 87.507231][ T5360] ? direct_splice_actor+0x10c/0x160 [ 87.507243][ T5360] ? __pfx_iter_file_splice_write+0x10/0x10 [ 87.507257][ T5360] direct_splice_actor+0xfe/0x160 [ 87.507272][ T5360] splice_direct_to_actor+0x5a8/0xcc0 [ 87.507292][ T5360] ? __pfx_direct_splice_actor+0x10/0x10 [ 87.507306][ T5360] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 87.507328][ T5360] do_splice_direct+0x181/0x270 [ 87.507344][ T5360] ? __pfx_do_splice_direct+0x10/0x10 [ 87.507356][ T5360] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 87.507371][ T5360] ? rw_verify_area+0x255/0x4d0 [ 87.507385][ T5360] do_sendfile+0x4da/0x7e0 [ 87.507401][ T5360] ? __pfx_do_sendfile+0x10/0x10 [ 87.507415][ T5360] ? rcu_is_watching+0x15/0xb0 [ 87.507428][ T5360] ? __rseq_handle_notify_resume+0x37e/0x11f0 [ 87.507449][ T5360] __se_sys_sendfile64+0x13e/0x190 [ 87.507465][ T5360] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 87.507480][ T5360] ? rcu_is_watching+0x15/0xb0 [ 87.507493][ T5360] ? do_syscall_64+0xbe/0x3b0 [ 87.507508][ T5360] do_syscall_64+0xfa/0x3b0 [ 87.507522][ T5360] ? lockdep_hardirqs_on+0x9c/0x150 [ 87.507533][ T5360] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.507543][ T5360] ? clear_bhb_loop+0x60/0xb0 [ 87.507553][ T5360] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.507562][ T5360] RIP: 0033:0x7fe04258ebe9 [ 87.507575][ T5360] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 87.507583][ T5360] RSP: 002b:00007fe04340c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 87.507595][ T5360] RAX: ffffffffffffffda RBX: 00007fe0427b6090 RCX: 00007fe04258ebe9 [ 87.507602][ T5360] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 [ 87.507607][ T5360] RBP: 00007fe042611e19 R08: 0000000000000000 R09: 0000000000000000 [ 87.507613][ T5360] R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 [ 87.507619][ T5360] R13: 00007fe0427b6128 R14: 00007fe0427b6090 R15: 00007ffd0e0c5a28 [ 87.507628][ T5360] [ 88.021337][ T5337] Bluetooth: hci0: command tx timeout [ 90.049778][ T5337] Bluetooth: hci0: command tx timeout [ 91.570196][ T5336] usb 5-1: unable to get BOS descriptor or descriptor too short [ 91.585917][ T5336] usb 5-1: unable to read config index 0 descriptor/start: -32 [ 91.595564][ T5336] usb 5-1: chopping to 0 config(s) [ 91.611059][ T5336] usb 5-1: can't read configurations, error -32 [ 91.736355][ T9] cfg80211: failed to load regulatory.db [ 91.749916][ T5336] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 91.879665][ T5336] usb 5-1: device descriptor read/64, error -32 [ 91.990351][ T5336] usb usb5-port1: attempt power cycle [ 92.129695][ T5337] Bluetooth: hci0: command tx timeout [ 92.329655][ T5336] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 92.350070][ T5336] usb 5-1: device descriptor read/8, error -32