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fs/adfs: newdir: improve directory validation

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Check that the lastmask and reserved fields are all zero, as per the
documentation.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Russell King
2019-12-09 11:10:32 +00:00
committed by Al Viro
parent ffc8df347e
commit 7a0e4048bf
1 changed files with 1 additions and 0 deletions
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fs/adfs/dir_f.c
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@@ -127,6 +127,7 @@ static int adfs_f_validate(struct adfs_dir *dir)
struct adfs_newdirtail *tail = dir->newtail;
if (head->startmasseq != tail->endmasseq ||
tail->dirlastmask || tail->reserved[0] || tail->reserved[1] ||
(memcmp(&head->startname, "Nick", 4) &&
memcmp(&head->startname, "Hugo", 4)) ||
memcmp(&head->startname, &tail->endname, 4) ||