hfsplus: invalid length 2325 has been corrected to 255 hfsplus: invalid length 2325 has been corrected to 255 ============================================ WARNING: possible recursive locking detected syzkaller #0 Not tainted -------------------------------------------- syz.0.1837/19303 is trying to acquire lock: ffff88803c9f0ff8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x3a0/0x1670 fs/hfsplus/extents.c:262 but task is already holding lock: ffff88803c9f2df8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x2c6/0xce0 fs/hfsplus/extents.c:577 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz.0.1837/19303: #0: ffff888036af0480 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88803c9f3058 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:1034 [inline] #1: ffff88803c9f3058 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: do_truncate+0x18f/0x250 fs/open.c:63 #2: ffff88803c9f2df8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x2c6/0xce0 fs/hfsplus/extents.c:577 #3: ffff8880734b88e8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_free+0xc7/0x630 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 1 UID: 0 PID: 19303 Comm: syz.0.1837 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_deadlock_bug+0x279/0x290 kernel/locking/lockdep.c:3041 check_deadlock kernel/locking/lockdep.c:3093 [inline] validate_chain kernel/locking/lockdep.c:3895 [inline] __lock_acquire+0x253f/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/rtmutex_api.c:534 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:553 hfsplus_get_block+0x3a0/0x1670 fs/hfsplus/extents.c:262 block_read_full_folio+0x29f/0x830 fs/buffer.c:2317 filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502 do_read_cache_folio+0x2bf/0x560 mm/filemap.c:4107 do_read_cache_page mm/filemap.c:4173 [inline] read_cache_page+0x5d/0x170 mm/filemap.c:4182 read_mapping_page include/linux/pagemap.h:1011 [inline] hfsplus_block_free+0x134/0x630 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x121/0xa50 fs/hfsplus/extents.c:362 hfsplus_file_truncate+0x7aa/0xce0 fs/hfsplus/extents.c:593 hfsplus_setattr+0x1c4/0x270 fs/hfsplus/inode.c:286 notify_change+0xc18/0xf60 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4307 [inline] do_open fs/namei.c:4703 [inline] path_openat+0x2fc4/0x38a0 fs/namei.c:4858 do_file_open+0x23e/0x4a0 fs/namei.c:4887 do_sys_openat2+0x113/0x200 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_open fs/open.c:1378 [inline] __se_sys_open fs/open.c:1374 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1374 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f208089ce59 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 RSP: 002b:00007f207eacd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f2080b16090 RCX: 00007f208089ce59 RDX: 0000000000000020 RSI: 000000000004827e RDI: 0000200000000200 RBP: 00007f2080932d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2080b16128 R14: 00007f2080b16090 R15: 00007fffcd8e2ad8 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent: start 134, count 1