Hello, syzbot found the following issue on: HEAD commit: 5ad3cb0ed525 Merge tag 'for-v6.8-rc2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1687d706180000 kernel config: https://syzkaller.appspot.com/x/.config?x=80c7a82a572c0de3 dashboard link: https://syzkaller.appspot.com/bug?extid=e126b819d8187b282d44 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/b865f2727884/disk-5ad3cb0e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b1c7b0d47f5c/vmlinux-5ad3cb0e.xz kernel image: https://storage.googleapis.com/syzbot-assets/21afab19a0ed/bzImage-5ad3cb0e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e126b819d8187b282d44@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in case_fold fs/hfsplus/unicode.c:23 [inline] BUG: KMSAN: uninit-value in hfsplus_strcasecmp+0x1ca/0x770 fs/hfsplus/unicode.c:47 case_fold fs/hfsplus/unicode.c:23 [inline] hfsplus_strcasecmp+0x1ca/0x770 fs/hfsplus/unicode.c:47 hfsplus_cat_case_cmp_key+0xde/0x190 fs/hfsplus/catalog.c:26 hfs_find_rec_by_key+0xb0/0x240 fs/hfsplus/bfind.c:100 __hfsplus_brec_find+0x26b/0x7b0 fs/hfsplus/bfind.c:135 hfsplus_brec_find+0x445/0x970 fs/hfsplus/bfind.c:195 hfsplus_brec_read+0x46/0x1a0 fs/hfsplus/bfind.c:222 hfsplus_fill_super+0x199a/0x26f0 fs/hfsplus/super.c:531 mount_bdev+0x38f/0x510 fs/super.c:1658 hfsplus_mount+0x4d/0x60 fs/hfsplus/super.c:647 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 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb5/0x110 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 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] hfsplus_find_init+0x91/0x250 fs/hfsplus/bfind.c:21 hfsplus_fill_super+0x1688/0x26f0 fs/hfsplus/super.c:525 mount_bdev+0x38f/0x510 fs/super.c:1658 hfsplus_mount+0x4d/0x60 fs/hfsplus/super.c:647 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 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb5/0x110 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: 0 PID: 5298 Comm: syz-executor.4 Not tainted 6.8.0-rc6-syzkaller-00238-g5ad3cb0ed525 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ===================================================== --- 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
