program: r0 = socket$inet6_sctp(0xa, 0x5, 0x84) ioctl$F2FS_IOC_START_ATOMIC_WRITE(r0, 0xf501, 0x0) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$eJzs3U1sHGf9B/DvbnbX3vz/Sp02SQOqRNRIBRGROLGSYi4NCKFIVKgqB8TRSpzGyiatHBc5EYLwfuDCoXeKRG5cQOIeVM7AqVcfKyFx6SmAxKKZnbXXr9l1Yq8tPp9odp5nnpd5nt/M7OzOKnKA/1nXzqXxOLVcO/fmcpFfeTTTWXk0c6efTjKRpJ40eqvU7ia1j5Kr6S35TLGx6q623X4+WJh9++NPVz7p5RrVUtav79Rukyv1LTY+rJacSXKkWj+Ddf1d39Bfa+TuaqszLAJ2th84GLdmku463z21VvJUw1+3wIFVK++bm6/5qeRoksnqc0Dvrti7Zx9qD8c9AAAAANgHL/yy/Ap/bNzjAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgMOk9/f/i1W51PvpM6n1//5/q9qWKn2oPR73AAAAAAAAAABgdN/8/w0bPvckT7KcY/18t1b+5v9qmTlRvv5f3s+9zGcx57OcuSxlKYu5mGSqLG+Wr63luaWlxYtDtLy02jIDLS8NOYP27icPAAAAAAAAAIdFY/QmP861td//AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADgIKglR3qrcjnRT0+l3kgymaRV1HuY/LWfPpB+/afBXPff3dKmao/3c0wAAAAwJi88yZMs51g/362V3/lPld/7J/N+7mYpC1lKJ/O5UT4L6H3rr688mumsPJq5Uyyb+/3qP0YaRtljes8ett7z6bJGOzezUG45n+t5N53cSL1sWTjdH8/W4/pRMabaG5UhR3ajWhcz/1WaI81qN2pD15wqI1KMqBeR6aptEY3jO0dixKPT31M/9hdTX33yc+J5xny5t3r9t711MZ+fjxSTvbYxEpcGzr5TK6ntEInk83/83Xdude7enrh579zBmdIIJgaeoG2MxMxAJF7e+ZxIM1Ukbh3WSAyaLiNxcjV/Ld/It3MuZ/JWFrOQ72UuS5nPmXw9czmSuep8Ll6ndo7U1XW5t542klZ5XJrVu+jwY1rKXF4t2x7LQr6Vd3Mj87lS/ruUi3m96jGrR/jkEFd9fbR32rNfGHiY/Isk7eHa7YNiYMdX706DZ/10eR0cX7dl7Tp48fnfjxqfrRLFPn4ycETGb2MkLg5E4qWdI/Gb8m3lXufu7cVbc+8Nub/XqnVxHf3sQN0livPlxeJglbn1Z0dR9tLGsslevFrVLy69svV33KLs5GrZ9lfq5VzObFn71JY9XSrLXt6ybKYsOz1Qtu7z1tXe5y0ADryjXzzaav+9/Zf2h+2ftm+135z82sSXJ15ppfnn5lca00deq79S+0M+zA/Wvv8DAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAC7d+/+g9tznc784oZEt9v94TZFe5hoJ+lvSZ7Wqpmn19mbRCtJmWj0E6P1MzFU5dba0Xnj988y5uaorZLnEqhGdZLdf3D7n91ud98P0xaJ5g7n/FqiW9lU1B2q+dgS/+o+vw7H/MYE7LkLS3feu3Dv/oMvLdyZe2f+nfm7s5cvz07PXr7ytws3Fzrz073XcY8S2AtrN/1xjwQAAAAAAAAAAAAY1n78t4Rtdv2ffZ4qAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAcEhdOzdRpc5PF68rj2Y6xdJPr1Ysq9WT1L6f1D5Krqa3ZGqgu9p2+/lgYfbtjz9d+aSXa1RLWb++rl1zN7N4WC05k+RItR40+Qz9Xa/WuxpZqbY6wyJgZ/uBg3H7bwAAAP//2wMQAg==") r1 = creat(&(0x7f0000000100)='./file1\x00', 0x30) io_setup(0x202, &(0x7f0000000200)=0x0) r3 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x11, 0x3, &(0x7f0000000180)=ANY=[@ANYBLOB="1800000000000500000000000000000095"], &(0x7f0000000000)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x2, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94) bpf$BPF_RAW_TRACEPOINT_OPEN(0x11, &(0x7f0000000040)={&(0x7f00000000c0)='mmap_lock_acquire_returned\x00', r3}, 0x10) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000180)={0xffffffffffffffff, 0xffffffffffffffff}) pipe(&(0x7f0000000200)={0xffffffffffffffff, 0xffffffffffffffff}) splice(r5, 0x0, r7, 0x0, 0x8000f28, 0x0) splice(r6, 0x0, r5, 0x0, 0x7f, 0xe) write(r4, 0x0, 0x0) mmap(&(0x7f0000000000/0xfbe000)=nil, 0xfbe000, 0x1000002, 0x4012831, 0xffffffffffffffff, 0x0) mmap(&(0x7f0000a44000/0x4000)=nil, 0x4000, 0x0, 0xbc32038f2d035af6, 0xffffffffffffffff, 0x2882c000) r8 = syz_open_procfs(0x0, &(0x7f0000000580)='smaps_rollup\x00') lseek(r8, 0x2004, 0x0) bpf$MAP_CREATE(0x0, 0x0, 0x50) io_submit(r2, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r1, &(0x7f0000000000), 0x70000}]) getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3(r0, 0x84, 0x1a, 0x0, &(0x7f0000000300)=0x9b) socket$inet_sctp(0x2, 0x5, 0x84) [ 73.088219][ T5308] Bluetooth: hci0: command tx timeout [ 73.174677][ T5328] loop0: detected capacity change from 0 to 1024 [ 73.613956][ T5328] [ 73.615532][ T5328] ============================================ [ 73.618207][ T5328] WARNING: possible recursive locking detected [ 73.620813][ T5328] 6.16.0-rc1-syzkaller-00004-gaef17cb3d3c4 #0 Not tainted [ 73.623574][ T5328] -------------------------------------------- [ 73.626211][ T5328] syz.0.0/5328 is trying to acquire lock: [ 73.628787][ T5328] ffff888052e10108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 73.634835][ T5328] [ 73.634835][ T5328] but task is already holding lock: [ 73.638202][ T5328] ffff888052e12988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 73.643182][ T5328] [ 73.643182][ T5328] other info that might help us debug this: [ 73.646511][ T5328] Possible unsafe locking scenario: [ 73.646511][ T5328] [ 73.649559][ T5328] CPU0 [ 73.650988][ T5328] ---- [ 73.652414][ T5328] lock(&HFSPLUS_I(inode)->extents_lock); [ 73.654870][ T5328] lock(&HFSPLUS_I(inode)->extents_lock); [ 73.657977][ T5328] [ 73.657977][ T5328] *** DEADLOCK *** [ 73.657977][ T5328] [ 73.662572][ T5328] May be due to missing lock nesting notation [ 73.662572][ T5328] [ 73.666988][ T5328] 3 locks held by syz.0.0/5328: [ 73.669588][ T5328] #0: ffff888052e12b78 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: generic_file_write_iter+0xe3/0x540 [ 73.674581][ T5328] #1: ffff888052e12988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990 [ 73.679659][ T5328] #2: ffff888034a2c0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x15a/0x1d0 [ 73.684863][ T5328] [ 73.684863][ T5328] stack backtrace: [ 73.687552][ T5328] CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted 6.16.0-rc1-syzkaller-00004-gaef17cb3d3c4 #0 PREEMPT(full) [ 73.687569][ T5328] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 73.687575][ T5328] Call Trace: [ 73.687582][ T5328] [ 73.687587][ T5328] dump_stack_lvl+0x189/0x250 [ 73.687607][ T5328] ? __pfx_dump_stack_lvl+0x10/0x10 [ 73.687624][ T5328] ? __pfx__printk+0x10/0x10 [ 73.687635][ T5328] ? print_lock_name+0xde/0x100 [ 73.687647][ T5328] print_deadlock_bug+0x28b/0x2a0 [ 73.687683][ T5328] validate_chain+0x1a3f/0x2140 [ 73.687695][ T5328] ? check_path+0x21/0x40 [ 73.687706][ T5328] ? check_noncircular+0xe0/0x160 [ 73.687716][ T5328] ? look_up_lock_class+0x74/0x170 [ 73.687778][ T5328] ? register_lock_class+0x51/0x320 [ 73.687798][ T5328] __lock_acquire+0xab9/0xd20 [ 73.687814][ T5328] ? hfsplus_file_extend+0x1fc/0x1990 [ 73.687826][ T5328] lock_acquire+0x120/0x360 [ 73.687841][ T5328] ? hfsplus_file_extend+0x1fc/0x1990 [ 73.687856][ T5328] __mutex_lock+0x182/0xe80 [ 73.687866][ T5328] ? hfsplus_file_extend+0x1fc/0x1990 [ 73.687880][ T5328] ? check_path+0x21/0x40 [ 73.687888][ T5328] ? check_noncircular+0xe0/0x160 [ 73.687898][ T5328] ? hfsplus_file_extend+0x1fc/0x1990 [ 73.687912][ T5328] ? __pfx___mutex_lock+0x10/0x10 [ 73.687925][ T5328] hfsplus_file_extend+0x1fc/0x1990 [ 73.687942][ T5328] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 73.687955][ T5328] ? __mutex_trylock_common+0x153/0x260 [ 73.687967][ T5328] ? __pfx___mutex_trylock_common+0x10/0x10 [ 73.687979][ T5328] ? rcu_is_watching+0x15/0xb0 [ 73.687993][ T5328] ? trace_contention_end+0x39/0x120 [ 73.688005][ T5328] ? __mutex_lock+0x330/0xe80 [ 73.688015][ T5328] ? hfsplus_brec_find+0x191/0x500 [ 73.688028][ T5328] hfsplus_bmap_reserve+0x122/0x500 [ 73.688047][ T5328] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 73.688063][ T5328] __hfsplus_ext_cache_extent+0x89/0xe30 [ 73.688086][ T5328] hfsplus_file_extend+0x444/0x1990 [ 73.688104][ T5328] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 73.688120][ T5328] ? clean_bdev_aliases+0x5c9/0x6b0 [ 73.688138][ T5328] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 73.688156][ T5328] hfsplus_get_block+0x411/0x1530 [ 73.688172][ T5328] ? __pfx_hfsplus_get_block+0x10/0x10 [ 73.688184][ T5328] ? do_raw_spin_unlock+0x4d/0x240 [ 73.688196][ T5328] ? _raw_spin_unlock+0x28/0x50 [ 73.688211][ T5328] __block_write_begin_int+0x6b2/0x1900 [ 73.688227][ T5328] ? folio_add_lru+0x1b2/0x3d0 [ 73.688242][ T5328] ? __pfx_hfsplus_get_block+0x10/0x10 [ 73.688255][ T5328] ? __pfx___block_write_begin_int+0x10/0x10 [ 73.688273][ T5328] cont_write_begin+0x789/0xb50 [ 73.688291][ T5328] ? __pfx_cont_write_begin+0x10/0x10 [ 73.688305][ T5328] ? __pfx___might_resched+0x10/0x10 [ 73.688324][ T5328] ? folio_unlock+0x101/0x160 [ 73.688337][ T5328] hfsplus_write_begin+0x66/0xb0 [ 73.688349][ T5328] ? __pfx_hfsplus_get_block+0x10/0x10 [ 73.688362][ T5328] generic_perform_write+0x2c4/0x910 [ 73.688379][ T5328] ? __pfx_generic_perform_write+0x10/0x10 [ 73.688394][ T5328] ? file_update_time+0x2da/0x490 [ 73.688411][ T5328] ? __generic_file_write_iter+0xf9/0x230 [ 73.688425][ T5328] ? generic_file_write_iter+0xfb/0x540 [ 73.688440][ T5328] generic_file_write_iter+0x10f/0x540 [ 73.688455][ T5328] ? aa_file_perm+0x11f/0xed0 [ 73.688501][ T5328] ? __pfx_generic_file_write_iter+0x10/0x10 [ 73.688523][ T5328] ? __lock_acquire+0xab9/0xd20 [ 73.688543][ T5328] ? aio_write+0x4c4/0x7a0 [ 73.688557][ T5328] aio_write+0x535/0x7a0 [ 73.688570][ T5328] ? __pfx_aio_write+0x10/0x10 [ 73.688586][ T5328] ? __might_fault+0xb0/0x130 [ 73.688601][ T5328] io_submit_one+0x78b/0x1310 [ 73.688617][ T5328] ? __pfx_io_submit_one+0x10/0x10 [ 73.688630][ T5328] ? __might_fault+0xb0/0x130 [ 73.688642][ T5328] ? __might_fault+0xb0/0x130 [ 73.688652][ T5328] __se_sys_io_submit+0x185/0x2f0 [ 73.688665][ T5328] ? __pfx___se_sys_io_submit+0x10/0x10 [ 73.688679][ T5328] ? do_syscall_64+0xbe/0x3b0 [ 73.688691][ T5328] do_syscall_64+0xfa/0x3b0 [ 73.688701][ T5328] ? lockdep_hardirqs_on+0x9c/0x150 [ 73.688720][ T5328] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.688732][ T5328] ? clear_bhb_loop+0x60/0xb0 [ 73.688745][ T5328] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.688757][ T5328] RIP: 0033:0x7fa9ddb8e929 [ 73.688770][ T5328] 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 [ 73.688780][ T5328] RSP: 002b:00007fa9de9df038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 73.688794][ T5328] RAX: ffffffffffffffda RBX: 00007fa9dddb5fa0 RCX: 00007fa9ddb8e929 [ 73.688804][ T5328] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007fa9de995000 [ 73.688812][ T5328] RBP: 00007fa9ddc10b39 R08: 0000000000000000 R09: 0000000000000000 [ 73.688820][ T5328] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 73.688826][ T5328] R13: 0000000000000000 R14: 00007fa9dddb5fa0 R15: 00007fffc0b066c8 [ 73.688837][ T5328]