* [PATCH] fix info leak
@ 2003-07-18 1:57 Albert Cahalan
0 siblings, 0 replies; only message in thread
From: Albert Cahalan @ 2003-07-18 1:57 UTC (permalink / raw)
To: linux-kernel; +Cc: Andrew Morton, Linus Torvalds
Here's a better fix for the kernel stack data
leaking out into user-space. (due to padding)
This fix takes advantage of the fact that an i386
machine is little-endian. The type of st_rdev may
be widened to fill the gap, causing the extra 2
bytes to get zeroed when st_rdev is written to.
Everybody: use -Wpadded to find these
--- old/include/asm-i386/stat.h 2003-06-26 17:50:47.000000000 -0400
+++ new/include/asm-i386/stat.h 2003-07-17 18:23:01.000000000 -0400
@@ -9,6 +9,6 @@
unsigned short st_uid;
unsigned short st_gid;
- unsigned short st_rdev;
+ unsigned int st_rdev;
unsigned long st_size;
unsigned long st_atime;
unsigned long st_mtime;
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2003-07-18 1:51 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2003-07-18 1:57 [PATCH] fix info leak Albert Cahalan
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.