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filldir[64]: remove WARN_ON_ONCE() for bad directory entries

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commit b9959c7a34 upstream.

This was always meant to be a temporary thing, just for testing and to
see if it actually ever triggered.

The only thing that reported it was syzbot doing disk image fuzzing, and
then that warning is expected.  So let's just remove it before -rc4,
because the extra sanity testing should probably go to -stable, but we
don't want the warning to do so.

Reported-by: syzbot+3031f712c7ad5dd4d926@syzkaller.appspotmail.com
Fixes: 8a23eb804c ("Make filldir[64]() verify the directory entry filename is valid")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Siddharth Chandrasekaran <csiddharth@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Torvalds
2019-10-18 18:41:16 -04:00
committed by Greg Kroah-Hartman
parent 89f58402e7
commit 1944687187
1 changed files with 2 additions and 2 deletions
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4
fs/readdir.c
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@@ -90,9 +90,9 @@ EXPORT_SYMBOL(iterate_dir);
*/
static int verify_dirent_name(const char *name, int len)
{
if (WARN_ON_ONCE(!len))
if (!len)
return -EIO;
if (WARN_ON_ONCE(memchr(name, '/', len)))
if (memchr(name, '/', len))
return -EIO;
return 0;
}