loop1: detected capacity change from 0 to 64 ===================================================== BUG: KMSAN: uninit-value in hfs_brec_keylen+0x39c/0x640 fs/hfs/brec.c:46 hfs_brec_keylen+0x39c/0x640 fs/hfs/brec.c:46 __hfs_brec_find+0x11e/0x8b0 fs/hfs/bfind.c:69 hfs_brec_find+0x4c4/0x9f0 fs/hfs/bfind.c:138 hfs_cat_move+0x122d/0x1390 fs/hfs/catalog.c:372 hfs_rename+0x313/0x550 fs/hfs/dir.c:299 vfs_rename+0x1e87/0x2460 fs/namei.c:5137 do_renameat2+0x175e/0x1d70 fs/namei.c:5286 __do_sys_renameat2 fs/namei.c:5320 [inline] __se_sys_renameat2 fs/namei.c:5317 [inline] __x64_sys_renameat2+0x15d/0x210 fs/namei.c:5317 x64_sys_call+0x3733/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:317 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable data created at: hfs_bnode_read_u16+0x3b/0x90 fs/hfs/bnode.c:44 hfs_brec_keylen+0x209/0x640 fs/hfs/brec.c:45 CPU: 0 UID: 0 PID: 7647 Comm: syz.1.401 Not tainted 6.16.0-rc3-syzkaller-00072-gee88bddf7f2f #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 =====================================================