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', 0x185102, 0x0) 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(&(0x7f00000000c0)='./bus\x00', 0x572) truncate(&(0x7f00000013c0)='./file1\x00', 0x0) [ 88.966396][ T10] cfg80211: failed to load regulatory.db [ 88.977472][ T5311] Bluetooth: hci0: command tx timeout [ 89.089249][ T5333] loop0: detected capacity change from 0 to 2048 [ 89.168455][ T5333] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=2362, location=2362 [ 89.192741][ T5333] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d [ 89.217873][ T5333] UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 160: 0xd2 != 0xd4 [ 89.238128][ T5333] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 89.272510][ T25] audit: type=1800 audit(1750352546.793:2): 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 [ 89.717804][ T5326] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 89.949332][ T5333] [ 89.950398][ T5333] ============================================ [ 89.952931][ T5333] WARNING: possible recursive locking detected [ 89.955562][ T5333] 6.16.0-rc2-syzkaller-00087-g24770983ccfe #0 Not tainted [ 89.958407][ T5333] -------------------------------------------- [ 89.960927][ T5333] syz.0.0/5333 is trying to acquire lock: [ 89.963282][ T5333] ffff888040421528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_free_blocks+0x9e2/0x17f0 [ 89.967337][ T5333] [ 89.967337][ T5333] but task is already holding lock: [ 89.977479][ T5333] ffff888040421528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 89.981552][ T5333] [ 89.981552][ T5333] other info that might help us debug this: [ 89.984802][ T5333] Possible unsafe locking scenario: [ 89.984802][ T5333] [ 89.998408][ T5333] CPU0 [ 89.999999][ T5333] ---- [ 90.001593][ T5333] lock(&sbi->s_alloc_mutex); [ 90.003871][ T5333] lock(&sbi->s_alloc_mutex); [ 90.016380][ T5333] [ 90.016380][ T5333] *** DEADLOCK *** [ 90.016380][ T5333] [ 90.025316][ T5333] May be due to missing lock nesting notation [ 90.025316][ T5333] [ 90.037699][ T5333] 4 locks held by syz.0.0/5333: [ 90.039685][ T5333] #0: ffff888032c80428 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 [ 90.043704][ T5333] #1: ffff888052c5cf60 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: udf_file_write_iter+0x6e/0x6c0 [ 90.048427][ T5333] #2: ffff888052c5cd90 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x291/0x42a0 [ 90.055730][ T5333] #3: ffff888040421528 (&sbi->s_alloc_mutex){+.+.}-{4:4}, at: udf_prealloc_blocks+0x8d0/0x10b0 [ 90.059979][ T5333] [ 90.059979][ T5333] stack backtrace: [ 90.062323][ T5333] CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.16.0-rc2-syzkaller-00087-g24770983ccfe #0 PREEMPT(full) [ 90.062338][ T5333] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 90.062344][ T5333] Call Trace: [ 90.062352][ T5333] [ 90.062358][ T5333] dump_stack_lvl+0x189/0x250 [ 90.062381][ T5333] ? __pfx_dump_stack_lvl+0x10/0x10 [ 90.062393][ T5333] ? __pfx__printk+0x10/0x10 [ 90.062403][ T5333] ? print_lock_name+0xde/0x100 [ 90.062411][ T5333] print_deadlock_bug+0x28b/0x2a0 [ 90.062421][ T5333] validate_chain+0x1a3f/0x2140 [ 90.062430][ T5333] ? finish_task_switch+0x18b/0x950 [ 90.062444][ T5333] __lock_acquire+0xab9/0xd20 [ 90.062457][ T5333] ? udf_free_blocks+0x9e2/0x17f0 [ 90.062465][ T5333] lock_acquire+0x120/0x360 [ 90.062476][ T5333] ? udf_free_blocks+0x9e2/0x17f0 [ 90.062487][ T5333] __mutex_lock+0x182/0xe80 [ 90.062546][ T5333] ? udf_free_blocks+0x9e2/0x17f0 [ 90.062555][ T5333] ? __pfx_folio_mark_accessed+0x10/0x10 [ 90.062567][ T5333] ? udf_free_blocks+0x9e2/0x17f0 [ 90.062577][ T5333] ? __pfx___mutex_lock+0x10/0x10 [ 90.062587][ T5333] ? __pfx___might_resched+0x10/0x10 [ 90.062602][ T5333] udf_free_blocks+0x9e2/0x17f0 [ 90.062611][ T5333] ? bdev_getblk+0x7b/0x690 [ 90.062621][ T5333] ? udf_get_fileshortad+0x6e/0x1b0 [ 90.062635][ T5333] ? __pfx_udf_free_blocks+0x10/0x10 [ 90.062648][ T5333] udf_delete_aext+0x4df/0xbc0 [ 90.062657][ T5333] ? udf_get_fileshortad+0xcb/0x1b0 [ 90.062671][ T5333] ? __pfx_udf_delete_aext+0x10/0x10 [ 90.062682][ T5333] udf_prealloc_blocks+0xb7e/0x10b0 [ 90.062691][ T5333] ? udf_get_filelongad+0x6e/0x1b0 [ 90.062703][ T5333] ? __pfx_udf_new_block+0x10/0x10 [ 90.062710][ T5333] ? udf_current_aext+0x660/0xad0 [ 90.062720][ T5333] ? __pfx_udf_prealloc_blocks+0x10/0x10 [ 90.062730][ T5333] ? udf_map_block+0x1508/0x42a0 [ 90.062746][ T5333] udf_map_block+0x1ddd/0x42a0 [ 90.062763][ T5333] ? percpu_ref_get_many+0x19/0x140 [ 90.062775][ T5333] ? __pfx_udf_map_block+0x10/0x10 [ 90.062785][ T5333] ? percpu_ref_get_many+0x19/0x140 [ 90.062800][ T5333] ? do_raw_spin_lock+0x121/0x290 [ 90.062810][ T5333] ? do_raw_spin_unlock+0x4d/0x240 [ 90.062820][ T5333] __udf_get_block+0x52/0x250 [ 90.062828][ T5333] ? create_empty_buffers+0x465/0x530 [ 90.062839][ T5333] __block_write_begin_int+0x6b2/0x1900 [ 90.062852][ T5333] ? folio_add_lru+0x1b2/0x3d0 [ 90.062862][ T5333] ? __pfx_udf_get_block+0x10/0x10 [ 90.062871][ T5333] ? __pfx___block_write_begin_int+0x10/0x10 [ 90.062883][ T5333] ? __pfx_udf_get_block+0x10/0x10 [ 90.062891][ T5333] block_write_begin+0x8a/0x120 [ 90.062901][ T5333] ? udf_write_begin+0x7d/0x260 [ 90.062910][ T5333] udf_write_begin+0x100/0x260 [ 90.062918][ T5333] generic_perform_write+0x2c7/0x910 [ 90.062932][ T5333] ? __pfx_generic_perform_write+0x10/0x10 [ 90.062944][ T5333] ? generic_file_direct_write+0x385/0x3e0 [ 90.062955][ T5333] ? file_update_time+0x416/0x490 [ 90.062966][ T5333] __generic_file_write_iter+0x1ae/0x230 [ 90.062979][ T5333] udf_file_write_iter+0x2d5/0x6c0 [ 90.062988][ T5333] iter_file_splice_write+0x937/0x1000 [ 90.063002][ T5333] ? __pfx_iter_file_splice_write+0x10/0x10 [ 90.063011][ T5333] ? rcu_read_lock_any_held+0xb3/0x120 [ 90.063021][ T5333] ? direct_splice_actor+0x10c/0x160 [ 90.063029][ T5333] ? __pfx_iter_file_splice_write+0x10/0x10 [ 90.063038][ T5333] direct_splice_actor+0xfe/0x160 [ 90.063048][ T5333] splice_direct_to_actor+0x5a8/0xcc0 [ 90.063060][ T5333] ? __pfx_direct_splice_actor+0x10/0x10 [ 90.063071][ T5333] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 90.063079][ T5333] ? __pfx_aa_file_perm+0x10/0x10 [ 90.063092][ T5333] do_splice_direct+0x181/0x270 [ 90.063102][ T5333] ? __pfx_do_splice_direct+0x10/0x10 [ 90.063110][ T5333] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 90.063121][ T5333] ? rw_verify_area+0x258/0x650 [ 90.063134][ T5333] do_sendfile+0x4da/0x7e0 [ 90.063145][ T5333] ? __pfx_do_sendfile+0x10/0x10 [ 90.063154][ T5333] ? rcu_is_watching+0x15/0xb0 [ 90.063166][ T5333] ? __rseq_handle_notify_resume+0x37e/0x11f0 [ 90.063179][ T5333] __se_sys_sendfile64+0x13e/0x190 [ 90.063189][ T5333] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 90.063198][ T5333] ? rcu_is_watching+0x15/0xb0 [ 90.063211][ T5333] ? do_syscall_64+0xbe/0x3b0 [ 90.063219][ T5333] do_syscall_64+0xfa/0x3b0 [ 90.063227][ T5333] ? lockdep_hardirqs_on+0x9c/0x150 [ 90.063240][ T5333] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 90.063249][ T5333] ? clear_bhb_loop+0x60/0xb0 [ 90.063258][ T5333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 90.063267][ T5333] RIP: 0033:0x7f511c98e929 [ 90.063278][ T5333] 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 [ 90.063286][ T5333] RSP: 002b:00007f511d847038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 90.063298][ T5333] RAX: ffffffffffffffda RBX: 00007f511cbb5fa0 RCX: 00007f511c98e929 [ 90.063305][ T5333] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 90.063311][ T5333] RBP: 00007f511ca10b39 R08: 0000000000000000 R09: 0000000000000000 [ 90.063316][ T5333] R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 [ 90.063322][ T5333] R13: 0000000000000000 R14: 00007f511cbb5fa0 R15: 00007ffe80799968 [ 90.063331][ T5333] [ 91.038592][ T5311] Bluetooth: hci0: command tx timeout [ 93.115683][ T5311] Bluetooth: hci0: command tx timeout [ 94.954363][ T5326] usb 5-1: unable to get BOS descriptor or descriptor too short [ 94.973301][ T5326] usb 5-1: unable to read config index 0 descriptor/start: -32 [ 94.976721][ T5326] usb 5-1: chopping to 0 config(s) [ 94.978775][ T5326] usb 5-1: can't read configurations, error -32 [ 95.104222][ T5326] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 95.194262][ T5311] Bluetooth: hci0: command tx timeout [ 95.234408][ T5326] usb 5-1: device descriptor read/64, error -32 [ 95.344387][ T5326] usb usb5-port1: attempt power cycle [ 95.684225][ T5326] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 95.704474][ T5326] usb 5-1: device descriptor read/8, error -32