Hello, syzbot found the following issue on: HEAD commit: 46e8b6e7cfeb string: use __builtin_memcpy() in strlcpy/str.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=13ea03bc280000 kernel config: https://syzkaller.appspot.com/x/.config?x=a7a1059074b7bdce dashboard link: https://syzkaller.appspot.com/bug?extid=00a3779539a23cbee38c compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ad7fff770529/disk-46e8b6e7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ca6a66fcd14c/vmlinux-46e8b6e7.xz kernel image: https://storage.googleapis.com/syzbot-assets/9dc8f5fe8588/bzImage-46e8b6e7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+00a3779539a23cbee38c@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): checking transaction log (loop5) REISERFS (device loop5): Using r5 hash to sort names reiserfs: enabling write barrier flush mode ===================================================== BUG: KMSAN: uninit-value in reiserfs_security_init+0x663/0x750 fs/reiserfs/xattr_security.c:84 reiserfs_security_init+0x663/0x750 fs/reiserfs/xattr_security.c:84 reiserfs_mkdir+0x418/0xfc0 fs/reiserfs/namei.c:823 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:890 [inline] reiserfs_xattr_init+0x47e/0xc00 fs/reiserfs/xattr.c:1006 reiserfs_remount+0xf9c/0x2390 legacy_reconfigure+0x182/0x1d0 fs/fs_context.c:633 reconfigure_super+0x346/0xdf0 fs/super.c:956 do_remount fs/namespace.c:2701 [inline] path_mount+0x19c1/0x1ee0 fs/namespace.c:3361 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3568 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3568 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Local variable security created at: reiserfs_mkdir+0x5f/0xfc0 fs/reiserfs/namei.c:791 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:890 [inline] reiserfs_xattr_init+0x47e/0xc00 fs/reiserfs/xattr.c:1006 CPU: 1 PID: 7610 Comm: syz-executor.5 Not tainted 6.4.0-rc1-syzkaller-g46e8b6e7cfeb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ===================================================== --- 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 bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
