Hello, syzbot found the following issue on: HEAD commit: e6bc8833d80f 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=16c43f97280000 kernel config: https://syzkaller.appspot.com/x/.config?x=6a7e173060c804ee dashboard link: https://syzkaller.appspot.com/bug?extid=cd311b1e43cc25f90d18 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/df1e5cb3acfa/disk-e6bc8833.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/55bdfe53ed68/vmlinux-e6bc8833.xz kernel image: https://storage.googleapis.com/syzbot-assets/3e2a33babf5f/bzImage-e6bc8833.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cd311b1e43cc25f90d18@xxxxxxxxxxxxxxxxxxxxxxxxx UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ===================================================== BUG: KMSAN: uninit-value in udf_name_from_CS0+0x1581/0x1a40 fs/udf/unicode.c:250 udf_name_from_CS0+0x1581/0x1a40 fs/udf/unicode.c:250 udf_get_filename+0xa4/0x150 fs/udf/unicode.c:390 udf_fiiter_find_entry+0x77b/0xa60 fs/udf/namei.c:90 udf_unlink+0x80/0x920 fs/udf/namei.c:547 vfs_unlink+0x66f/0xa20 fs/namei.c:4327 do_unlinkat+0x3fa/0xed0 fs/namei.c:4393 __do_sys_unlink fs/namei.c:4441 [inline] __se_sys_unlink fs/namei.c:4439 [inline] __ia32_sys_unlink+0x77/0xa0 fs/namei.c:4439 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 Uninit was created at: slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716 slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490 kmalloc_trace+0x51/0x200 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] udf_fiiter_find_entry+0x213/0xa60 fs/udf/namei.c:66 udf_unlink+0x80/0x920 fs/udf/namei.c:547 vfs_unlink+0x66f/0xa20 fs/namei.c:4327 do_unlinkat+0x3fa/0xed0 fs/namei.c:4393 __do_sys_unlink fs/namei.c:4441 [inline] __se_sys_unlink fs/namei.c:4439 [inline] __ia32_sys_unlink+0x77/0xa0 fs/namei.c:4439 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 CPU: 1 PID: 5699 Comm: syz-executor.2 Not tainted 6.4.0-rc7-syzkaller-ge6bc8833d80f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 ===================================================== --- 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
