svcrpc: Revert "sunrpc/cache.h: replace simple_strtoul"

Commit bbf43dc888833ac0539e437dbaeb28bfd4fbab9f "sunrpc/cache.h: replace
simple_strtoul" introduced new range-checking which could cause get_int
to fail on unsigned integers too large to be represented as an int.

We could parse them as unsigned instead--but it turns out svcgssd is
actually passing down "-1" in some cases.  Which is perhaps stupid, but
there's nothing we can do about it now.

So just revert back to the previous "sloppy" behavior that accepts
either representation.

Cc: stable@vger.kernel.org
Reported-by: Sven Geggus <lists@fuchsschwanzdomain.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index f792794f663..5dc9ee4d616 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -217,6 +217,8 @@ extern int qword_get(char **bpp, char *dest, int bufsize);
 static inline int get_int(char **bpp, int *anint)
 {
         char buf[50];
+        char *ep;
+        int rv;
         int len = qword_get(bpp, buf, sizeof(buf));
 
         if (len < 0)
@@ -224,9 +226,11 @@ static inline int get_int(char **bpp, int *anint)
         if (len == 0)
                 return -ENOENT;
 
-        if (kstrtoint(buf, 0, anint))
+        rv = simple_strtol(buf, &ep, 0);
+        if (*ep)
                 return -EINVAL;
 
+        *anint = rv;
         return 0;
 }