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authorJan Engelhardt <jengelh@gmx.de>2006-06-25 05:47:35 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-25 10:01:05 -0700
commit0928d68056fa25456830b1de9f0ee89bc37447cd (patch)
treeeafca87385013b4ff11a11192de048a0e0a0b3b3 /fs/openpromfs
parent2e6113908fe76a06295cb243f1f2f0eea055b0c2 (diff)
downloadlinux-0928d68056fa25456830b1de9f0ee89bc37447cd.tar.gz
[PATCH] openpromfs: fix missing NUL
tchars is not '\0'-terminated so the strtoul may run into problems. Fix that. Also make tchars as big as a long in hexadecimal form would take rather than just 16. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/openpromfs')
-rw-r--r--fs/openpromfs/inode.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index 464e2bce020..c0cbe97cdc6 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -448,10 +448,11 @@ static ssize_t property_write(struct file *filp, const char __user *buf,
*q |= simple_strtoul (tmp, NULL, 16);
buf += last_cnt;
} else {
- char tchars[17]; /* XXX yuck... */
+ char tchars[2 * sizeof(long) + 1];
- if (copy_from_user(tchars, buf, 16))
+ if (copy_from_user(tchars, buf, sizeof(tchars) - 1))
return -EFAULT;
+ tchars[sizeof(tchars) - 1] = '\0';
*q = simple_strtoul (tchars, NULL, 16);
buf += 9;
}