syzbot has found a reproducer for the following issue on: HEAD commit: 8ffd015db85f Linux 6.15-rc2 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=105820cc580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e30b69a28cc940e1 dashboard link: https://syzkaller.appspot.com/bug?extid=efd267470a41bc34bd98 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107c0470580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158a6a3f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b099795f8c63/disk-8ffd015d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a10b15dc31a5/vmlinux-8ffd015d.xz kernel image: https://storage.googleapis.com/syzbot-assets/24a20f2e33c6/bzImage-8ffd015d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/c80aacb02924/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+efd267470a41bc34bd98@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in hfs_bnode_read_u8 fs/hfs/bnode.c:54 [inline] BUG: KMSAN: uninit-value in hfs_bnode_dump+0x30e/0x4c0 fs/hfs/bnode.c:172 hfs_bnode_read_u8 fs/hfs/bnode.c:54 [inline] hfs_bnode_dump+0x30e/0x4c0 fs/hfs/bnode.c:172 hfs_brec_remove+0x868/0x9a0 fs/hfs/brec.c:225 hfs_cat_move+0xfc9/0x12e0 fs/hfs/catalog.c:364 hfs_rename+0x344/0x500 fs/hfs/dir.c:299 vfs_rename+0x1d9d/0x2280 fs/namei.c:5086 do_renameat2+0x1577/0x1b80 fs/namei.c:5235 __do_sys_rename fs/namei.c:5282 [inline] __se_sys_rename fs/namei.c:5280 [inline] __x64_sys_rename+0xe8/0x140 fs/namei.c:5280 x64_sys_call+0x3a1e/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:83 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable data.i created at: hfs_bnode_read_u16 fs/hfs/bnode.c:-1 [inline] hfs_bnode_dump+0x3c5/0x4c0 fs/hfs/bnode.c:156 hfs_brec_remove+0x868/0x9a0 fs/hfs/brec.c:225 CPU: 0 UID: 0 PID: 5792 Comm: syz-executor395 Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ===================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
