program: r0 = syz_mount_image$hfsplus(&(0x7f0000000080), &(0x7f0000000100)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") syz_open_dev$usbfs(&(0x7f0000003f00), 0x1ff, 0xa401) fstat(r0, &(0x7f0000000000)={0x0, 0x0, 0x0, 0x0, 0x0}) quotactl$Q_SETQUOTA(0xffffffff80000800, &(0x7f0000000480)=@loop={'/dev/loop', 0x0}, r1, &(0x7f0000000540)={0x0, 0x7ffffffffffffffd, 0x700, 0x2000000, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x8d000003}) mount$9p_virtio(&(0x7f0000000000), &(0x7f0000000140)='./file1\x00', &(0x7f0000000180), 0x80004, &(0x7f0000000240)={'trans=virtio,', {[{@msize={'msize', 0x3d, 0x487}}, {@cache_fscache}, {@cachetag={'cachetag', 0x3d, 'hfsplus\x00'}}, {@nodevmap}, {@noxattr}, {@privport}, {@cache_mmap}, {@version_9p2000}, {@privport}, {@nodevmap}], [{@fowner_eq={'fowner', 0x3d, r1}}, {@flag='ro'}, {@dont_appraise}, {@smackfsfloor={'smackfsfloor', 0x3d, 'hfsplus\x00'}}, {@fsmagic={'fsmagic', 0x3d, 0x10}}, {@hash}, {@seclabel}]}}) r2 = creat(&(0x7f0000000040)='./file1\x00', 0x0) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r3, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r2, &(0x7f0000000000), 0x70000}]) [ 84.851743][ T5322] loop0: detected capacity change from 0 to 1024 [ 84.870796][ T5301] Bluetooth: hci0: command tx timeout [ 85.096058][ T5322] [ 85.097302][ T5322] ============================================ [ 85.100352][ T5322] WARNING: possible recursive locking detected [ 85.103362][ T5322] syzkaller #0 Not tainted [ 85.105569][ T5322] -------------------------------------------- [ 85.108351][ T5322] syz.0.0/5322 is trying to acquire lock: [ 85.110681][ T5322] ffff8880377f8e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.116106][ T5322] [ 85.116106][ T5322] but task is already holding lock: [ 85.119884][ T5322] ffff88803778a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.126022][ T5322] [ 85.126022][ T5322] other info that might help us debug this: [ 85.130086][ T5322] Possible unsafe locking scenario: [ 85.130086][ T5322] [ 85.134283][ T5322] CPU0 [ 85.136129][ T5322] ---- [ 85.137990][ T5322] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.141089][ T5322] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.143873][ T5322] [ 85.143873][ T5322] *** DEADLOCK *** [ 85.143873][ T5322] [ 85.147544][ T5322] May be due to missing lock nesting notation [ 85.147544][ T5322] [ 85.151219][ T5322] 3 locks held by syz.0.0/5322: [ 85.153595][ T5322] #0: ffff88803778a4b8 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680 [ 85.158455][ T5322] #1: ffff88803778a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.164199][ T5322] #2: ffff8880421c40b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 [ 85.168779][ T5322] [ 85.168779][ T5322] stack backtrace: [ 85.171730][ T5322] CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.171752][ T5322] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.171761][ T5322] Call Trace: [ 85.171770][ T5322] [ 85.171778][ T5322] dump_stack_lvl+0xe8/0x150 [ 85.171871][ T5322] print_deadlock_bug+0x279/0x290 [ 85.171900][ T5322] __lock_acquire+0x253f/0x2cf0 [ 85.171920][ T5322] ? unwind_next_frame+0xa5/0x23c0 [ 85.171940][ T5322] ? __bfs+0x153/0x290 [ 85.171952][ T5322] ? __pfx_hlock_conflict+0x10/0x10 [ 85.171970][ T5322] lock_acquire+0xf0/0x2e0 [ 85.171983][ T5322] ? hfsplus_file_extend+0x215/0x1d70 [ 85.172047][ T5322] __mutex_lock+0x19f/0x1300 [ 85.172138][ T5322] ? hfsplus_file_extend+0x215/0x1d70 [ 85.172163][ T5322] ? __bfs+0x153/0x290 [ 85.172176][ T5322] ? hfsplus_file_extend+0x215/0x1d70 [ 85.172194][ T5322] ? __pfx___mutex_lock+0x10/0x10 [ 85.172212][ T5322] ? lockdep_unlock+0x5d/0xd0 [ 85.172224][ T5322] ? __lock_acquire+0x146e/0x2cf0 [ 85.172239][ T5322] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 85.172255][ T5322] hfsplus_file_extend+0x215/0x1d70 [ 85.172275][ T5322] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.172291][ T5322] ? __pfx___mutex_trylock_common+0x10/0x10 [ 85.172309][ T5322] ? rcu_is_watching+0x15/0xb0 [ 85.172324][ T5322] ? trace_contention_end+0x3d/0x150 [ 85.172342][ T5322] ? __asan_memset+0x22/0x50 [ 85.172358][ T5322] ? hfsplus_brec_find+0x19d/0x520 [ 85.172375][ T5322] hfsplus_bmap_reserve+0x125/0x510 [ 85.172391][ T5322] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 85.172409][ T5322] __hfsplus_ext_cache_extent+0x89/0xe30 [ 85.172426][ T5322] hfsplus_file_extend+0x4af/0x1d70 [ 85.172443][ T5322] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.172460][ T5322] ? clean_bdev_aliases+0x62e/0x750 [ 85.172473][ T5322] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 85.172487][ T5322] hfsplus_get_block+0x42c/0x1670 [ 85.172506][ T5322] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.172523][ T5322] ? do_raw_spin_unlock+0x4d/0x210 [ 85.172534][ T5322] ? _raw_spin_unlock+0x28/0x50 [ 85.172549][ T5322] __block_write_begin_int+0x6c6/0x1910 [ 85.172564][ T5322] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.172582][ T5322] ? __pfx___block_write_begin_int+0x10/0x10 [ 85.172597][ T5322] cont_write_begin+0x737/0xae0 [ 85.172609][ T5322] ? irqentry_exit+0x59e/0x620 [ 85.172628][ T5322] ? __pfx_cont_write_begin+0x10/0x10 [ 85.172644][ T5322] hfsplus_write_begin+0x66/0xb0 [ 85.172660][ T5322] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.172676][ T5322] generic_perform_write+0x2e2/0x8f0 [ 85.172693][ T5322] ? __pfx_generic_perform_write+0x10/0x10 [ 85.172705][ T5322] ? file_update_time_flags+0x219/0x4a0 [ 85.172723][ T5322] ? __generic_file_write_iter+0xf9/0x230 [ 85.172735][ T5322] ? generic_file_write_iter+0x136/0x680 [ 85.172748][ T5322] generic_file_write_iter+0x14a/0x680 [ 85.172762][ T5322] ? __pfx_generic_file_write_iter+0x10/0x10 [ 85.172774][ T5322] ? do_raw_spin_lock+0x12b/0x2f0 [ 85.172787][ T5322] ? __lock_acquire+0x6b5/0x2cf0 [ 85.172813][ T5322] ? lockdep_hardirqs_on+0x7a/0x110 [ 85.172836][ T5322] ? kasan_save_track+0x4f/0x80 [ 85.172859][ T5322] ? aio_write+0x547/0x870 [ 85.172877][ T5322] aio_write+0x5cd/0x870 [ 85.172891][ T5322] ? __pfx_aio_write+0x10/0x10 [ 85.172913][ T5322] io_submit_one+0x7bb/0x14c0 [ 85.172927][ T5322] ? irqentry_exit+0x59e/0x620 [ 85.172955][ T5322] ? trace_irq_disable+0x3b/0x150 [ 85.172973][ T5322] ? __pfx_io_submit_one+0x10/0x10 [ 85.172986][ T5322] ? __might_fault+0xaf/0x130 [ 85.173000][ T5322] __se_sys_io_submit+0x195/0x340 [ 85.173021][ T5322] ? __pfx___se_sys_io_submit+0x10/0x10 [ 85.173040][ T5322] do_syscall_64+0x14d/0xf80 [ 85.173058][ T5322] ? trace_irq_disable+0x3b/0x150 [ 85.173075][ T5322] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.173088][ T5322] ? clear_bhb_loop+0x40/0x90 [ 85.173104][ T5322] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.173113][ T5322] RIP: 0033:0x7f470759c799 [ 85.173125][ T5322] 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 [ 85.173135][ T5322] RSP: 002b:00007f4708377fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 85.173147][ T5322] RAX: ffffffffffffffda RBX: 00007f4707815fa0 RCX: 00007f470759c799 [ 85.173156][ T5322] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f470834f000 [ 85.173162][ T5322] RBP: 00007f4707632c99 R08: 0000000000000000 R09: 0000000000000000 [ 85.173168][ T5322] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.173174][ T5322] R13: 00007f4707816038 R14: 00007f4707815fa0 R15: 00007ffdd8598978 [ 85.173184][ T5322]