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ncpfs: read buffer overflow

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This function uses signed integers for the unix_date and local variables -
if a negative number is supplied and the leap-year condition is not met,
month will be 0, leading to a later read of day_n[-1]

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Petr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roel Kluin 2009-09-22 16:45:54 -07:00 committed by Linus Torvalds
parent a7e3108cca
commit c5df59136a
1 changed files with 1 additions and 1 deletions
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2
fs/ncpfs/dir.c
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@ -1241,7 +1241,7 @@ ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date)
month = 2; month = 2;
} else { } else {
nl_day = (year & 3) || day <= 59 ? day : day - 1; nl_day = (year & 3) || day <= 59 ? day : day - 1;
for (month = 0; month < 12; month++) for (month = 1; month < 12; month++)
if (day_n[month] > nl_day) if (day_n[month] > nl_day)
break; break;
} }