syzbot has found a reproducer for the following issue on: HEAD commit: 5ad3cb0ed525 Merge tag 'for-v6.8-rc2' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=14fa7b8c180000 kernel config: https://syzkaller.appspot.com/x/.config?x=80c7a82a572c0de3 dashboard link: https://syzkaller.appspot.com/bug?extid=04486d87f6240a004c85 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=116f5a6a180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16cb9306180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a148235ac5b1/disk-5ad3cb0e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4b06f4d02ad6/vmlinux-5ad3cb0e.xz kernel image: https://storage.googleapis.com/syzbot-assets/7fff06beed25/bzImage-5ad3cb0e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/0c762eef88b9/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+04486d87f6240a004c85@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 64 hfs: filesystem is marked locked, mounting read-only. ===================================================== BUG: KMSAN: uninit-value in hfs_cat_keycmp+0x154/0x210 fs/hfs/catalog.c:178 hfs_cat_keycmp+0x154/0x210 fs/hfs/catalog.c:178 __hfs_brec_find+0x250/0x820 fs/hfs/bfind.c:75 hfs_brec_find+0x436/0x970 fs/hfs/bfind.c:138 hfs_brec_read+0x3f/0x1a0 fs/hfs/bfind.c:165 hfs_cat_find_brec+0xe6/0x400 fs/hfs/catalog.c:194 hfs_fill_super+0x1f27/0x23c0 fs/hfs/super.c:419 mount_bdev+0x38f/0x510 fs/super.c:1658 hfs_mount+0x4d/0x60 fs/hfs/super.c:456 legacy_get_tree+0x110/0x290 fs/fs_context.c:662 vfs_get_tree+0xa5/0x560 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x73d/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x140 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook mm/slub.c:3819 [inline] slab_alloc_node mm/slub.c:3860 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc+0x919/0xf80 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] hfs_find_init+0x91/0x250 fs/hfs/bfind.c:21 hfs_fill_super+0x1eb9/0x23c0 fs/hfs/super.c:416 mount_bdev+0x38f/0x510 fs/super.c:1658 hfs_mount+0x4d/0x60 fs/hfs/super.c:456 legacy_get_tree+0x110/0x290 fs/fs_context.c:662 vfs_get_tree+0xa5/0x560 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x73d/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x140 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 1 PID: 5019 Comm: syz-executor380 Not tainted 6.8.0-rc6-syzkaller-00238-g5ad3cb0ed525 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ===================================================== --- 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.
