strnlen_user returns the length of the string including the nul
terminator. In the case where maxlen is reached strnlen_user returns
maxlen + 1. Most callsites already check for this condition. Fix the
call to strnlen_user in fs/exec.c to check for the maxlen case.
Signed-off-by: Ryan Mallon <rmallon@xxxxxxxxx>
---
diff --git a/fs/exec.c b/fs/exec.c
index 25dcbe5..e19588c 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -481,7 +481,7 @@ static int copy_strings(int argc, struct user_arg_ptr argv,
goto out;
len = strnlen_user(str, MAX_ARG_STRLEN);
- if (!len)
+ if (!len || len> MAX_ARG_STRLEN)
goto out;
ret = -E2BIG;
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
