Hello, syzbot found the following issue on: HEAD commit: 305230142ae0 Merge tag 'pm-6.7-rc1-2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=155bcf18e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=956549bd1d1e9efd dashboard link: https://syzkaller.appspot.com/bug?extid=d41ef22a1e1ce5b449b2 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/16a813d08871/disk-30523014.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/226b88790aa7/vmlinux-30523014.xz kernel image: https://storage.googleapis.com/syzbot-assets/b1b45d0d85fa/bzImage-30523014.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d41ef22a1e1ce5b449b2@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in exfat_set_entry_time+0x2dc/0x320 fs/exfat/misc.c:99 exfat_set_entry_time+0x2dc/0x320 fs/exfat/misc.c:99 __exfat_write_inode+0x7ca/0xdd0 fs/exfat/inode.c:59 exfat_write_inode+0xd9/0x180 fs/exfat/inode.c:97 write_inode fs/fs-writeback.c:1473 [inline] __writeback_single_inode+0x843/0x12b0 fs/fs-writeback.c:1690 writeback_sb_inodes+0xb73/0x1c00 fs/fs-writeback.c:1916 wb_writeback+0x4a1/0xdf0 fs/fs-writeback.c:2092 wb_do_writeback fs/fs-writeback.c:2239 [inline] wb_workfn+0x3a4/0x1710 fs/fs-writeback.c:2279 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2703 worker_thread+0xf45/0x1490 kernel/workqueue.c:2784 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Local variable ts created at: __exfat_write_inode+0x105/0xdd0 fs/exfat/inode.c:29 exfat_write_inode+0xd9/0x180 fs/exfat/inode.c:97 CPU: 1 PID: 8475 Comm: kworker/u4:5 Not tainted 6.6.0-syzkaller-15365-g305230142ae0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: writeback wb_workfn (flush-7:4) ===================================================== --- 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
