diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2024-05-07 09:10:41 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-05-09 09:10:10 -0400 |
| commit | bafa6b4d95d97877baa61883ff90f7e374427fae (patch) | |
| tree | 9a0e51bf5e1d0a70e2bc45ae3a50e5bee8885dac /net/sunrpc | |
| parent | 939cb14d51a150e3c12ef7a8ce0ba04ce6131bd2 (diff) | |
SUNRPC: Fix gss_free_in_token_pages()
Dan Carpenter says:
> Commit 5866efa8cbfb ("SUNRPC: Fix svcauth_gss_proxy_init()") from Oct
> 24, 2019 (linux-next), leads to the following Smatch static checker
> warning:
>
> net/sunrpc/auth_gss/svcauth_gss.c:1039 gss_free_in_token_pages()
> warn: iterator 'i' not incremented
>
> net/sunrpc/auth_gss/svcauth_gss.c
> 1034 static void gss_free_in_token_pages(struct gssp_in_token *in_token)
> 1035 {
> 1036 u32 inlen;
> 1037 int i;
> 1038
> --> 1039 i = 0;
> 1040 inlen = in_token->page_len;
> 1041 while (inlen) {
> 1042 if (in_token->pages[i])
> 1043 put_page(in_token->pages[i]);
> ^
> This puts page zero over and over.
>
> 1044 inlen -= inlen > PAGE_SIZE ? PAGE_SIZE : inlen;
> 1045 }
> 1046
> 1047 kfree(in_token->pages);
> 1048 in_token->pages = NULL;
> 1049 }
Based on the way that the ->pages[] array is constructed in
gss_read_proxy_verf(), we know that once the loop encounters a NULL
page pointer, the remaining array elements must also be NULL.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Suggested-by: Trond Myklebust <trondmy@hammerspace.com>
Fixes: 5866efa8cbfb ("SUNRPC: Fix svcauth_gss_proxy_init()")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/auth_gss/svcauth_gss.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 24de94184700..96ab50eda9c2 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1033,17 +1033,11 @@ null_verifier: static void gss_free_in_token_pages(struct gssp_in_token *in_token) { - u32 inlen; int i; i = 0; - inlen = in_token->page_len; - while (inlen) { - if (in_token->pages[i]) - put_page(in_token->pages[i]); - inlen -= inlen > PAGE_SIZE ? PAGE_SIZE : inlen; - } - + while (in_token->pages[i]) + put_page(in_token->pages[i++]); kfree(in_token->pages); in_token->pages = NULL; } |