program: io_setup(0x8, &(0x7f0000002740)=0x0) r1 = socket$nl_generic(0x10, 0x3, 0x10) io_submit(r0, 0x1, &(0x7f0000000ac0)=[&(0x7f0000000880)={0x0, 0x0, 0x0, 0x7, 0x8, r1, 0x0, 0x0, 0x5}]) io_getevents(r0, 0x0, 0x0, 0x0, 0x0) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r2 = creat(&(0x7f0000000100)='./file1\x00', 0x22) r3 = socket(0x2a, 0x2, 0x0) sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000400)={&(0x7f0000000180)=@gettaction={0x14, 0x32, 0x1, 0x70bd29, 0x25dfdbfc}, 0x14}}, 0x20000000) getsockname$packet(r3, &(0x7f0000000540)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000240)=0x14) sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000440)=@newqdisc={0x44, 0x24, 0xf0b, 0x0, 0x0, {0x0, 0x0, 0x0, r4, {0x0, 0x4}, {0xffff, 0xffff}}, [@qdisc_kind_options=@q_hfsc={{0x9}, {0x14, 0x2, @TCA_HFSC_RSC={0x10, 0x1, {0x5, 0xa, 0x10002}}}}]}, 0x44}, 0x1, 0x0, 0x0, 0x4000}, 0x0) sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000500)={&(0x7f0000000680)=@newtfilter={0x40, 0x2c, 0xd27, 0x0, 0x0, {0x0, 0x0, 0x0, r4, {0xfffa, 0x4}, {}, {0x1c, 0xfff9}}, [@filter_kind_options=@f_matchall={{0xd}, {0xc, 0x2, [@TCA_MATCHALL_CLASSID={0x8, 0x1, {0x0, 0x4}}]}}]}, 0x40}}, 0x24000000) r5 = socket$netlink(0x10, 0x3, 0x0) r6 = socket$inet6_sctp(0xa, 0x5, 0x84) getsockopt$bt_hci(r6, 0x84, 0x7f, &(0x7f0000000080)=""/4041, &(0x7f0000000000)=0xfc9) sendmmsg(r5, &(0x7f00000002c0), 0x40000000000009f, 0x0) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r7, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r2, &(0x7f0000000000), 0x70000}]) [ 85.145662][ T5347] loop0: detected capacity change from 0 to 1024 [ 85.153531][ T45] Bluetooth: hci0: command tx timeout [ 85.305620][ T5347] Zero length message leads to an empty skb [ 85.325468][ T5347] [ 85.326535][ T5347] ============================================ [ 85.328978][ T5347] WARNING: possible recursive locking detected [ 85.331654][ T5347] 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 Not tainted [ 85.334646][ T5347] -------------------------------------------- [ 85.336935][ T5347] syz.0.0/5347 is trying to acquire lock: [ 85.338951][ T5347] ffff888052ea0108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 85.343252][ T5347] [ 85.343252][ T5347] but task is already holding lock: [ 85.346297][ T5347] ffff888052ea2988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 85.350846][ T5347] [ 85.350846][ T5347] other info that might help us debug this: [ 85.354233][ T5347] Possible unsafe locking scenario: [ 85.354233][ T5347] [ 85.357445][ T5347] CPU0 [ 85.358871][ T5347] ---- [ 85.360429][ T5347] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.362856][ T5347] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.365412][ T5347] [ 85.365412][ T5347] *** DEADLOCK *** [ 85.365412][ T5347] [ 85.368726][ T5347] May be due to missing lock nesting notation [ 85.368726][ T5347] [ 85.372092][ T5347] 3 locks held by syz.0.0/5347: [ 85.374069][ T5347] #0: ffff888052ea2b78 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: generic_file_write_iter+0xe3/0x540 [ 85.378728][ T5347] #1: ffff888052ea2988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 85.383191][ T5347] #2: ffff888036ad40b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x15a/0x1d0 [ 85.387293][ T5347] [ 85.387293][ T5347] stack backtrace: [ 85.389800][ T5347] CPU: 0 UID: 0 PID: 5347 Comm: syz.0.0 Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(full) [ 85.389817][ T5347] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 85.389825][ T5347] Call Trace: [ 85.389832][ T5347] [ 85.389839][ T5347] dump_stack_lvl+0x189/0x250 [ 85.389858][ T5347] ? __pfx_dump_stack_lvl+0x10/0x10 [ 85.389872][ T5347] ? __pfx__printk+0x10/0x10 [ 85.389892][ T5347] ? print_lock_name+0xde/0x100 [ 85.389906][ T5347] print_deadlock_bug+0x28b/0x2a0 [ 85.389923][ T5347] validate_chain+0x1a3f/0x2140 [ 85.389939][ T5347] ? check_path+0x21/0x40 [ 85.389951][ T5347] ? check_noncircular+0xe0/0x160 [ 85.389964][ T5347] ? look_up_lock_class+0x74/0x170 [ 85.390023][ T5347] ? register_lock_class+0x51/0x320 [ 85.390035][ T5347] __lock_acquire+0xab9/0xd20 [ 85.390047][ T5347] ? hfsplus_file_extend+0x1fc/0x1990 [ 85.390063][ T5347] lock_acquire+0x120/0x360 [ 85.390073][ T5347] ? hfsplus_file_extend+0x1fc/0x1990 [ 85.390089][ T5347] __mutex_lock+0x182/0xe80 [ 85.390099][ T5347] ? hfsplus_file_extend+0x1fc/0x1990 [ 85.390121][ T5347] ? check_path+0x21/0x40 [ 85.390132][ T5347] ? check_noncircular+0xe0/0x160 [ 85.390145][ T5347] ? hfsplus_file_extend+0x1fc/0x1990 [ 85.390161][ T5347] ? __pfx___mutex_lock+0x10/0x10 [ 85.390175][ T5347] hfsplus_file_extend+0x1fc/0x1990 [ 85.390191][ T5347] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.390204][ T5347] ? __mutex_trylock_common+0x153/0x260 [ 85.390219][ T5347] ? __pfx___mutex_trylock_common+0x10/0x10 [ 85.390233][ T5347] ? rcu_is_watching+0x15/0xb0 [ 85.390245][ T5347] ? trace_contention_end+0x39/0x120 [ 85.390258][ T5347] ? __mutex_lock+0x330/0xe80 [ 85.390267][ T5347] ? hfsplus_brec_find+0x191/0x500 [ 85.390281][ T5347] hfsplus_bmap_reserve+0x122/0x500 [ 85.390295][ T5347] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 85.390312][ T5347] __hfsplus_ext_cache_extent+0x89/0xe30 [ 85.390329][ T5347] hfsplus_file_extend+0x444/0x1990 [ 85.390346][ T5347] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.390363][ T5347] ? clean_bdev_aliases+0x5c9/0x6b0 [ 85.390381][ T5347] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 85.390397][ T5347] hfsplus_get_block+0x411/0x1530 [ 85.390414][ T5347] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.390429][ T5347] ? do_raw_spin_unlock+0x4d/0x240 [ 85.390445][ T5347] ? _raw_spin_unlock+0x28/0x50 [ 85.390461][ T5347] __block_write_begin_int+0x6b5/0x1900 [ 85.390479][ T5347] ? folio_add_lru+0x1b2/0x3d0 [ 85.390494][ T5347] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.390510][ T5347] ? __pfx___block_write_begin_int+0x10/0x10 [ 85.390528][ T5347] cont_write_begin+0x789/0xb50 [ 85.390547][ T5347] ? __pfx_cont_write_begin+0x10/0x10 [ 85.390563][ T5347] ? __pfx___might_resched+0x10/0x10 [ 85.390575][ T5347] ? folio_unlock+0x101/0x160 [ 85.390589][ T5347] hfsplus_write_begin+0x66/0xb0 [ 85.390602][ T5347] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.390617][ T5347] generic_perform_write+0x2c7/0x910 [ 85.390629][ T5347] ? __pfx_generic_perform_write+0x10/0x10 [ 85.390638][ T5347] ? file_update_time+0x2da/0x490 [ 85.390649][ T5347] ? __generic_file_write_iter+0xf9/0x230 [ 85.390659][ T5347] ? generic_file_write_iter+0xfb/0x540 [ 85.390670][ T5347] generic_file_write_iter+0x10f/0x540 [ 85.390681][ T5347] ? aa_file_perm+0x11f/0xed0 [ 85.390692][ T5347] ? __pfx_generic_file_write_iter+0x10/0x10 [ 85.390708][ T5347] ? __lock_acquire+0xab9/0xd20 [ 85.390721][ T5347] ? aio_write+0x4c4/0x7a0 [ 85.390737][ T5347] aio_write+0x532/0x7a0 [ 85.390753][ T5347] ? __pfx_aio_write+0x10/0x10 [ 85.390769][ T5347] ? __might_fault+0xb0/0x130 [ 85.390785][ T5347] io_submit_one+0x78b/0x1310 [ 85.390802][ T5347] ? __pfx_io_submit_one+0x10/0x10 [ 85.390816][ T5347] ? __might_fault+0xb0/0x130 [ 85.390830][ T5347] ? __might_fault+0xb0/0x130 [ 85.390842][ T5347] __se_sys_io_submit+0x185/0x2f0 [ 85.390856][ T5347] ? __pfx___se_sys_io_submit+0x10/0x10 [ 85.390871][ T5347] ? do_syscall_64+0xbe/0x3b0 [ 85.390882][ T5347] do_syscall_64+0xfa/0x3b0 [ 85.390900][ T5347] ? lockdep_hardirqs_on+0x9c/0x150 [ 85.390917][ T5347] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.390928][ T5347] ? clear_bhb_loop+0x60/0xb0 [ 85.390940][ T5347] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.390951][ T5347] RIP: 0033:0x7f179d78e929 [ 85.390962][ T5347] 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 [ 85.390972][ T5347] RSP: 002b:00007f179e5c5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 85.390985][ T5347] RAX: ffffffffffffffda RBX: 00007f179d9b5fa0 RCX: 00007f179d78e929 [ 85.390994][ T5347] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f179e57a000 [ 85.391002][ T5347] RBP: 00007f179d810b39 R08: 0000000000000000 R09: 0000000000000000 [ 85.391010][ T5347] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.391016][ T5347] R13: 0000000000000000 R14: 00007f179d9b5fa0 R15: 00007fff4ea1a828 [ 85.391027][ T5347]