* [PATCH][next] apparmor: fix memory leak on buffer on error exit path
@ 2018-03-27 13:35 Colin King
2018-03-31 4:12 ` John Johansen
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2018-03-27 13:35 UTC (permalink / raw)
To: John Johansen, James Morris, linux-security-module
Cc: kernel-janitors, Serge E . Hallyn, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Currently on the error exit path the allocated buffer is not free'd
causing a memory leak. Fix this by kfree'ing it.
Detected by CoverityScan, CID#1466876 ("Resource leaks")
Fixes: 1180b4c757aa ("apparmor: fix dangling symlinks to policy rawdata after replacement")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
security/apparmor/apparmorfs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 96bb6b73af65..949dd8a48164 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -1497,8 +1497,10 @@ static char *gen_symlink_name(int depth, const char *dirname, const char *fname)
}
error = snprintf(s, size, "raw_data/%s/%s", dirname, fname);
- if (error >= size || error < 0)
+ if (error >= size || error < 0) {
+ kfree(buffer);
return ERR_PTR(-ENAMETOOLONG);
+ }
return buffer;
}
--
2.15.1
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH][next] apparmor: fix memory leak on buffer on error exit path
2018-03-27 13:35 [PATCH][next] apparmor: fix memory leak on buffer on error exit path Colin King
@ 2018-03-31 4:12 ` John Johansen
0 siblings, 0 replies; 2+ messages in thread
From: John Johansen @ 2018-03-31 4:12 UTC (permalink / raw)
To: Colin King, James Morris, linux-security-module
Cc: kernel-janitors, Serge E . Hallyn, linux-kernel
On 03/27/2018 06:35 AM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Currently on the error exit path the allocated buffer is not free'd
> causing a memory leak. Fix this by kfree'ing it.
>
> Detected by CoverityScan, CID#1466876 ("Resource leaks")
>
> Fixes: 1180b4c757aa ("apparmor: fix dangling symlinks to policy rawdata after replacement")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
thanks Colin
I've pulled it into apparmor-next
> ---
> security/apparmor/apparmorfs.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
> index 96bb6b73af65..949dd8a48164 100644
> --- a/security/apparmor/apparmorfs.c
> +++ b/security/apparmor/apparmorfs.c
> @@ -1497,8 +1497,10 @@ static char *gen_symlink_name(int depth, const char *dirname, const char *fname)
> }
>
> error = snprintf(s, size, "raw_data/%s/%s", dirname, fname);
> - if (error >= size || error < 0)
> + if (error >= size || error < 0) {
> + kfree(buffer);
> return ERR_PTR(-ENAMETOOLONG);
> + }
>
> return buffer;
> }
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-03-27 13:35 [PATCH][next] apparmor: fix memory leak on buffer on error exit path Colin King
2018-03-31 4:12 ` John Johansen
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