program: r0 = socket$inet6_sctp(0xa, 0x1, 0x84) setsockopt$inet_sctp6_SCTP_PEER_ADDR_PARAMS(r0, 0x84, 0x9, &(0x7f0000000040)={0x0, @in={{0x2, 0x0, @empty}}}, 0x98) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r1 = creat(&(0x7f0000000100)='./file1\x00', 0x4) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r2, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r1, &(0x7f0000000000), 0x70000}]) [ 75.510627][ T4686] Bluetooth: hci0: command tx timeout [ 75.594755][ T5337] loop0: detected capacity change from 0 to 1024 [ 75.672242][ T5337] [ 75.673403][ T5337] ============================================ [ 75.676109][ T5337] WARNING: possible recursive locking detected [ 75.678891][ T5337] 6.16.0-rc6-syzkaller-00253-g4871b7cb27f4 #0 Not tainted [ 75.681986][ T5337] -------------------------------------------- [ 75.684780][ T5337] syz.0.0/5337 is trying to acquire lock: [ 75.687202][ T5337] ffff888052e58108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 75.691940][ T5337] [ 75.691940][ T5337] but task is already holding lock: [ 75.695197][ T5337] ffff888052e5a988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 75.699925][ T5337] [ 75.699925][ T5337] other info that might help us debug this: [ 75.703712][ T5337] Possible unsafe locking scenario: [ 75.703712][ T5337] [ 75.707127][ T5337] CPU0 [ 75.708783][ T5337] ---- [ 75.710270][ T5337] lock(&HFSPLUS_I(inode)->extents_lock); [ 75.712676][ T5337] lock(&HFSPLUS_I(inode)->extents_lock); [ 75.715296][ T5337] [ 75.715296][ T5337] *** DEADLOCK *** [ 75.715296][ T5337] [ 75.719042][ T5337] May be due to missing lock nesting notation [ 75.719042][ T5337] [ 75.722742][ T5337] 3 locks held by syz.0.0/5337: [ 75.724724][ T5337] #0: ffff888052e5ab78 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: generic_file_write_iter+0xe3/0x540 [ 75.729258][ T5337] #1: ffff888052e5a988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 75.734040][ T5337] #2: ffff88803700e0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x15a/0x1d0 [ 75.738286][ T5337] [ 75.738286][ T5337] stack backtrace: [ 75.740839][ T5337] CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted 6.16.0-rc6-syzkaller-00253-g4871b7cb27f4 #0 PREEMPT(full) [ 75.740853][ T5337] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.740858][ T5337] Call Trace: [ 75.740864][ T5337] [ 75.740869][ T5337] dump_stack_lvl+0x189/0x250 [ 75.740887][ T5337] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.740898][ T5337] ? __pfx__printk+0x10/0x10 [ 75.740913][ T5337] ? print_lock_name+0xde/0x100 [ 75.740930][ T5337] print_deadlock_bug+0x28b/0x2a0 [ 75.740945][ T5337] validate_chain+0x1a3f/0x2140 [ 75.740958][ T5337] ? check_path+0x21/0x40 [ 75.740969][ T5337] ? check_noncircular+0xe0/0x160 [ 75.740982][ T5337] ? look_up_lock_class+0x74/0x170 [ 75.741040][ T5337] ? register_lock_class+0x51/0x320 [ 75.741053][ T5337] __lock_acquire+0xab9/0xd20 [ 75.741067][ T5337] ? hfsplus_file_extend+0x1fc/0x1990 [ 75.741082][ T5337] lock_acquire+0x120/0x360 [ 75.741092][ T5337] ? hfsplus_file_extend+0x1fc/0x1990 [ 75.741111][ T5337] __mutex_lock+0x182/0xe80 [ 75.741120][ T5337] ? hfsplus_file_extend+0x1fc/0x1990 [ 75.741133][ T5337] ? check_path+0x21/0x40 [ 75.741146][ T5337] ? check_noncircular+0xe0/0x160 [ 75.741160][ T5337] ? hfsplus_file_extend+0x1fc/0x1990 [ 75.741175][ T5337] ? __pfx___mutex_lock+0x10/0x10 [ 75.741190][ T5337] hfsplus_file_extend+0x1fc/0x1990 [ 75.741205][ T5337] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 75.741215][ T5337] ? __mutex_trylock_common+0x153/0x260 [ 75.741223][ T5337] ? __pfx___mutex_trylock_common+0x10/0x10 [ 75.741235][ T5337] ? rcu_is_watching+0x15/0xb0 [ 75.741245][ T5337] ? trace_contention_end+0x39/0x120 [ 75.741257][ T5337] ? __mutex_lock+0x330/0xe80 [ 75.741266][ T5337] ? hfsplus_brec_find+0x191/0x500 [ 75.741278][ T5337] hfsplus_bmap_reserve+0x122/0x500 [ 75.741291][ T5337] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 75.741305][ T5337] __hfsplus_ext_cache_extent+0x89/0xe30 [ 75.741321][ T5337] hfsplus_file_extend+0x444/0x1990 [ 75.741361][ T5337] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 75.741378][ T5337] ? clean_bdev_aliases+0x5c9/0x6b0 [ 75.741397][ T5337] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 75.741414][ T5337] hfsplus_get_block+0x411/0x1530 [ 75.741433][ T5337] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.741446][ T5337] ? do_raw_spin_unlock+0x4d/0x240 [ 75.741456][ T5337] ? _raw_spin_unlock+0x28/0x50 [ 75.741467][ T5337] __block_write_begin_int+0x6b2/0x1900 [ 75.741477][ T5337] ? folio_add_lru+0x1b2/0x3d0 [ 75.741490][ T5337] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.741503][ T5337] ? __pfx___block_write_begin_int+0x10/0x10 [ 75.741520][ T5337] cont_write_begin+0x789/0xb50 [ 75.741540][ T5337] ? __pfx_cont_write_begin+0x10/0x10 [ 75.741557][ T5337] ? __pfx___might_resched+0x10/0x10 [ 75.741570][ T5337] ? folio_unlock+0x101/0x160 [ 75.741583][ T5337] hfsplus_write_begin+0x66/0xb0 [ 75.741595][ T5337] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.741609][ T5337] generic_perform_write+0x2c4/0x910 [ 75.741620][ T5337] ? __pfx_generic_perform_write+0x10/0x10 [ 75.741629][ T5337] ? file_update_time+0x2da/0x490 [ 75.741640][ T5337] ? __generic_file_write_iter+0xf9/0x230 [ 75.741650][ T5337] ? generic_file_write_iter+0xfb/0x540 [ 75.741659][ T5337] generic_file_write_iter+0x10f/0x540 [ 75.741669][ T5337] ? aa_file_perm+0x11f/0xed0 [ 75.741679][ T5337] ? __pfx_generic_file_write_iter+0x10/0x10 [ 75.741689][ T5337] ? __lock_acquire+0xab9/0xd20 [ 75.741697][ T5337] ? aio_write+0x4c4/0x7a0 [ 75.741707][ T5337] aio_write+0x535/0x7a0 [ 75.741719][ T5337] ? __pfx_aio_write+0x10/0x10 [ 75.741733][ T5337] ? __might_fault+0xb0/0x130 [ 75.741748][ T5337] io_submit_one+0x78b/0x1310 [ 75.741764][ T5337] ? __pfx_io_submit_one+0x10/0x10 [ 75.741776][ T5337] ? __might_fault+0xb0/0x130 [ 75.741789][ T5337] ? __might_fault+0xb0/0x130 [ 75.741799][ T5337] __se_sys_io_submit+0x185/0x2f0 [ 75.741811][ T5337] ? __pfx___se_sys_io_submit+0x10/0x10 [ 75.741822][ T5337] ? do_syscall_64+0xbe/0x3b0 [ 75.741834][ T5337] do_syscall_64+0xfa/0x3b0 [ 75.741845][ T5337] ? lockdep_hardirqs_on+0x9c/0x150 [ 75.741856][ T5337] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.741868][ T5337] ? clear_bhb_loop+0x60/0xb0 [ 75.741879][ T5337] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.741890][ T5337] RIP: 0033:0x7f158978e9a9 [ 75.741903][ T5337] 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 [ 75.741911][ T5337] RSP: 002b:00007f1585bed038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 75.741924][ T5337] RAX: ffffffffffffffda RBX: 00007f15899b5fa0 RCX: 00007f158978e9a9 [ 75.741932][ T5337] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f1585ba3000 [ 75.741940][ T5337] RBP: 00007f1589810d69 R08: 0000000000000000 R09: 0000000000000000 [ 75.741947][ T5337] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.741954][ T5337] R13: 0000000000000000 R14: 00007f15899b5fa0 R15: 00007ffed637f5b8 [ 75.741966][ T5337]