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| author | dann frazier <dannf@hp.com> | 2007-05-08 00:31:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:14 -0700 |
| commit | a2f72982e22b96862f8f15272732bd316d4db040 (patch) | |
| tree | 31877f6700c05e23dfdb504f3673874584d19f9c /drivers/char/moxa.c | |
| parent | 83ae1b79c898838e16ac8cde69b39d22d36fb035 (diff) | |
| download | linux-a2f72982e22b96862f8f15272732bd316d4db040.tar.gz linux-a2f72982e22b96862f8f15272732bd316d4db040.tar.bz2 linux-a2f72982e22b96862f8f15272732bd316d4db040.zip | |
old buffer overflow in moxa driver
I noticed that the moxa input checking security bug described by
CVE-2005-0504 appears to remain unfixed upstream.
The issue is described here:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0504
Debian has been shipping the following patch from Andres Salomon.
(akpm: it's a privileged operation)
Signed-off-by: dann frazier <dannf@hp.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/moxa.c')
| -rw-r--r-- | drivers/char/moxa.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 7dbaee8d9402..e0d35c20c04f 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -1582,7 +1582,7 @@ copy: if(copy_from_user(&dltmp, argp, sizeof(struct dl_str))) return -EFAULT; - if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS) + if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS || dltmp.len < 0) return -EINVAL; switch(cmd) @@ -2529,6 +2529,8 @@ static int moxaloadbios(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr; int i; + if(len < 0 || len > sizeof(moxaBuff)) + return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; baseAddr = moxa_boards[cardno].basemem; @@ -2576,7 +2578,7 @@ static int moxaload320b(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr; int i; - if(len > sizeof(moxaBuff)) + if(len < 0 || len > sizeof(moxaBuff)) return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; @@ -2596,6 +2598,8 @@ static int moxaloadcode(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr, *ofsAddr; int retval, port, i; + if(len < 0 || len > sizeof(moxaBuff)) + return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; baseAddr = moxa_boards[cardno].basemem; |