Messages in this thread | | | From | OGAWA Hirofumi <> | Subject | Re: KCSAN: data-race in __fat_write_inode / fat12_ent_get | Date | Sat, 04 Apr 2020 15:14:02 +0900 |
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Dmitry Vyukov <dvyukov@google.com> writes:
> On Fri, Apr 3, 2020 at 3:36 PM OGAWA Hirofumi > <hirofumi@mail.parknet.co.jp> wrote: >> >> Hm, looks like the race between a directory entry vs a FAT entry. This >> bug was happened with the corrupted image? Or the image passes the check >> of dosfsck? >> >> If the corrupted image, it may be hard to prevent the all races. Well, >> anyway, the corrupted image of the report will help to detect this >> corruption. > > From the log, it's this program. > My bet on a corrupted image. syzkaller does not have format > descriptions for fat, so it's just random bytes.
You meant I can regenerate a disk image from that log (if so, how)?
If not, for next time, it would be helpful if syzkaller provides the log to regenerate the corrupted image (or saving a corrupted image) to reproduce this, then I can try to detect the corruption pattern early.
Thanks. -- OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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