program: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000280), 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) syz_kvm_setup_cpu$x86(r1, 0xffffffffffffffff, &(0x7f0000fe8000/0x18000)=nil, &(0x7f0000000000)=[@text64={0x40, 0x0}], 0x1, 0x0, 0x0, 0x0) ioctl$KVM_SET_USER_MEMORY_REGION(r1, 0x4010ae42, &(0x7f0000000040)={0x0, 0x0, 0x0, 0x1000, &(0x7f0000fec000/0x1000)=nil}) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r2 = creat(&(0x7f0000000180)='./file1\x00', 0x1a0) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r3, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r2, &(0x7f0000000000), 0x70000}]) r4 = bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f0000001900)={0x11, 0x3, &(0x7f0000000140)=ANY=[@ANYRES32, @ANYRESDEC=r3], &(0x7f0000000100)='syzkaller\x00'}, 0x94) openat$vmci(0xffffffffffffff9c, &(0x7f00000001c0), 0x2, 0x0) bpf$BPF_PROG_WITH_BTFID_LOAD(0x5, &(0x7f0000000e40)=@bpf_tracing={0x1a, 0x1, &(0x7f0000000900)=ANY=[@ANYBLOB="9400000000000004"], &(0x7f00000009c0)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x3e, '\x00', 0x0, 0x1c, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, r4}, 0x90) [ 74.084764][ T5295] Bluetooth: hci0: command tx timeout [ 74.215896][ T5316] loop0: detected capacity change from 0 to 1024 [ 74.307205][ T5316] [ 74.308176][ T5316] ============================================ [ 74.310831][ T5316] WARNING: possible recursive locking detected [ 74.313488][ T5316] syzkaller #0 Not tainted [ 74.315542][ T5316] -------------------------------------------- [ 74.318222][ T5316] syz.0.0/5316 is trying to acquire lock: [ 74.320796][ T5316] ffff888042c1ce88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 74.325875][ T5316] [ 74.325875][ T5316] but task is already holding lock: [ 74.329184][ T5316] ffff888042c1a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 74.334068][ T5316] [ 74.334068][ T5316] other info that might help us debug this: [ 74.337015][ T5316] Possible unsafe locking scenario: [ 74.337015][ T5316] [ 74.340107][ T5316] CPU0 [ 74.341504][ T5316] ---- [ 74.343006][ T5316] lock(&HFSPLUS_I(inode)->extents_lock); [ 74.345653][ T5316] lock(&HFSPLUS_I(inode)->extents_lock); [ 74.348256][ T5316] [ 74.348256][ T5316] *** DEADLOCK *** [ 74.348256][ T5316] [ 74.351722][ T5316] May be due to missing lock nesting notation [ 74.351722][ T5316] [ 74.355440][ T5316] 3 locks held by syz.0.0/5316: [ 74.357576][ T5316] #0: ffff888042c1a4b8 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680 [ 74.362553][ T5316] #1: ffff888042c1a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 74.367446][ T5316] #2: ffff888034a5a0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 [ 74.371661][ T5316] [ 74.371661][ T5316] stack backtrace: [ 74.374254][ T5316] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 74.374269][ T5316] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 74.374277][ T5316] Call Trace: [ 74.374284][ T5316] [ 74.374290][ T5316] dump_stack_lvl+0xe8/0x150 [ 74.374310][ T5316] print_deadlock_bug+0x279/0x290 [ 74.374327][ T5316] __lock_acquire+0x253f/0x2cf0 [ 74.374343][ T5316] ? unwind_next_frame+0xa5/0x23c0 [ 74.374358][ T5316] ? __bfs+0x153/0x290 [ 74.374369][ T5316] ? __pfx_hlock_conflict+0x10/0x10 [ 74.374385][ T5316] lock_acquire+0xf0/0x2e0 [ 74.374397][ T5316] ? hfsplus_file_extend+0x215/0x1d70 [ 74.374412][ T5316] __mutex_lock+0x19f/0x1300 [ 74.374552][ T5316] ? hfsplus_file_extend+0x215/0x1d70 [ 74.374569][ T5316] ? __bfs+0x153/0x290 [ 74.374581][ T5316] ? hfsplus_file_extend+0x215/0x1d70 [ 74.374604][ T5316] ? __pfx___mutex_lock+0x10/0x10 [ 74.374622][ T5316] ? lockdep_unlock+0x5d/0xd0 [ 74.374633][ T5316] ? __lock_acquire+0x146e/0x2cf0 [ 74.374649][ T5316] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 74.374664][ T5316] hfsplus_file_extend+0x215/0x1d70 [ 74.374679][ T5316] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 74.374693][ T5316] ? __pfx___mutex_trylock_common+0x10/0x10 [ 74.374709][ T5316] ? rcu_is_watching+0x15/0xb0 [ 74.374720][ T5316] ? trace_contention_end+0x3d/0x150 [ 74.374733][ T5316] ? __asan_memset+0x22/0x50 [ 74.374744][ T5316] ? hfsplus_brec_find+0x19d/0x520 [ 74.374757][ T5316] hfsplus_bmap_reserve+0x125/0x510 [ 74.374769][ T5316] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 74.374785][ T5316] __hfsplus_ext_cache_extent+0x89/0xe30 [ 74.374800][ T5316] hfsplus_file_extend+0x4af/0x1d70 [ 74.374812][ T5316] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 74.374821][ T5316] ? clean_bdev_aliases+0x62e/0x750 [ 74.374831][ T5316] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 74.374841][ T5316] hfsplus_get_block+0x42c/0x1670 [ 74.374853][ T5316] ? __pfx_hfsplus_get_block+0x10/0x10 [ 74.374865][ T5316] ? do_raw_spin_unlock+0x4d/0x210 [ 74.374875][ T5316] ? _raw_spin_unlock+0x28/0x50 [ 74.374888][ T5316] __block_write_begin_int+0x6c6/0x1910 [ 74.374900][ T5316] ? __pfx_hfsplus_get_block+0x10/0x10 [ 74.374912][ T5316] ? __pfx___block_write_begin_int+0x10/0x10 [ 74.374923][ T5316] cont_write_begin+0x737/0xae0 [ 74.374933][ T5316] ? irqentry_exit+0x59e/0x620 [ 74.374949][ T5316] ? __pfx_cont_write_begin+0x10/0x10 [ 74.374961][ T5316] hfsplus_write_begin+0x66/0xb0 [ 74.374973][ T5316] ? __pfx_hfsplus_get_block+0x10/0x10 [ 74.374982][ T5316] generic_perform_write+0x2e2/0x8f0 [ 74.374990][ T5316] ? __pfx_generic_perform_write+0x10/0x10 [ 74.374996][ T5316] ? file_update_time_flags+0x219/0x4a0 [ 74.375006][ T5316] ? __generic_file_write_iter+0xf9/0x230 [ 74.375012][ T5316] ? generic_file_write_iter+0x136/0x680 [ 74.375018][ T5316] generic_file_write_iter+0x14a/0x680 [ 74.375024][ T5316] ? __pfx_generic_file_write_iter+0x10/0x10 [ 74.375030][ T5316] ? do_raw_spin_lock+0x12b/0x2f0 [ 74.375037][ T5316] ? __lock_acquire+0x6b5/0x2cf0 [ 74.375045][ T5316] ? lockdep_hardirqs_on+0x7a/0x110 [ 74.375054][ T5316] ? kasan_save_track+0x4f/0x80 [ 74.375064][ T5316] ? aio_write+0x547/0x870 [ 74.375076][ T5316] aio_write+0x5cd/0x870 [ 74.375089][ T5316] ? __pfx_aio_write+0x10/0x10 [ 74.375109][ T5316] io_submit_one+0x7bb/0x14c0 [ 74.375123][ T5316] ? irqentry_exit+0x59e/0x620 [ 74.375138][ T5316] ? trace_irq_disable+0x3b/0x150 [ 74.375153][ T5316] ? __pfx_io_submit_one+0x10/0x10 [ 74.375170][ T5316] ? __might_fault+0xaf/0x130 [ 74.375181][ T5316] __se_sys_io_submit+0x195/0x340 [ 74.375194][ T5316] ? __pfx___se_sys_io_submit+0x10/0x10 [ 74.375210][ T5316] do_syscall_64+0x14d/0xf80 [ 74.375224][ T5316] ? trace_irq_disable+0x3b/0x150 [ 74.375237][ T5316] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.375247][ T5316] ? clear_bhb_loop+0x40/0x90 [ 74.375258][ T5316] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.375278][ T5316] RIP: 0033:0x7f80e599c629 [ 74.375323][ T5316] 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 [ 74.375332][ T5316] RSP: 002b:00007f80e68e5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 74.375345][ T5316] RAX: ffffffffffffffda RBX: 00007f80e5c16090 RCX: 00007f80e599c629 [ 74.375353][ T5316] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f80e68bc000 [ 74.375360][ T5316] RBP: 00007f80e5a32b39 R08: 0000000000000000 R09: 0000000000000000 [ 74.375367][ T5316] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 74.375373][ T5316] R13: 00007f80e5c16128 R14: 00007f80e5c16090 R15: 00007fff0114a918 [ 74.375385][ T5316]