Hello, syzbot found the following issue on: HEAD commit: 610a9b8f49fb Linux 6.7-rc8 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=163c9fb5e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e51fe20c3e51ba7f dashboard link: https://syzkaller.appspot.com/bug?extid=04486d87f6240a004c85 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/daced691c987/disk-610a9b8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5e37367a7d1e/vmlinux-610a9b8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/013b65c960ab/bzImage-610a9b8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+04486d87f6240a004c85@xxxxxxxxxxxxxxxxxxxxxxxxx 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+0x3d7/0x560 fs/super.c:1650 hfs_mount+0x4d/0x60 fs/hfs/super.c:456 legacy_get_tree+0x110/0x290 fs/fs_context.c:662 vfs_get_tree+0xa5/0x520 fs/super.c:1771 do_new_mount+0x68d/0x1550 fs/namespace.c:3337 path_mount+0x73d/0x1f20 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3863 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3863 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384 entry_SYSENTER_compat_after_hwframe+0x70/0x7a Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] hfs_find_init+0x91/0x250 fs/hfs/bfind.c:21 hfs_fill_super+0x1eb9/0x23c0 fs/hfs/super.c:416 mount_bdev+0x3d7/0x560 fs/super.c:1650 hfs_mount+0x4d/0x60 fs/hfs/super.c:456 legacy_get_tree+0x110/0x290 fs/fs_context.c:662 vfs_get_tree+0xa5/0x520 fs/super.c:1771 do_new_mount+0x68d/0x1550 fs/namespace.c:3337 path_mount+0x73d/0x1f20 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3863 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3863 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384 entry_SYSENTER_compat_after_hwframe+0x70/0x7a CPU: 1 PID: 7246 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
