diff options
| author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-12-09 13:14:07 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-12-13 15:29:33 -0800 |
| commit | cb01c9ddcbb5a1c8049bacf1f145b402f0ce3a0a (patch) | |
| tree | b39a500a4e4964399316610026bdaff492928c0b /arch | |
| parent | 146f29f9da1334541858f1d89ae6b3ffeb33df45 (diff) | |
uml: boot broken due to buffer overrun
commit 361371201b60ffd686a694c848c1d5ad6061725f upstream.
mconsole_init() passed 256 bytes as length in os_create_unix_socket, while
the sizeof UNIX_PATH_MAX is 108. This patch fixes that problem and avoids
a big overrun bug reported on UML bootup.
sockaddr_un.sun_path is UNIX_PATH_MAX long which causes the problem.
Reported-by: Vikas K Managutte <vikki.km@gmail.com>
Reported-by: Sarvesh Kumar Lal Das <skldas@gmail.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Reviewed-by: WANG Cong <wangcong@zeuux.org>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index 19d579d74d2..8f44ebb0dec 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -16,6 +16,8 @@ #include <linux/slab.h> #include <linux/syscalls.h> #include <linux/utsname.h> +#include <linux/socket.h> +#include <linux/un.h> #include <linux/workqueue.h> #include <linux/mutex.h> #include <asm/uaccess.h> @@ -785,7 +787,7 @@ static int __init mconsole_init(void) /* long to avoid size mismatch warnings from gcc */ long sock; int err; - char file[256]; + char file[UNIX_PATH_MAX]; if (umid_file_name("mconsole", file, sizeof(file))) return -1; |