* [PATCH RESEND] keys: use kmalloc_flex in user_preparse
@ 2026-05-04 9:31 Thorsten Blum
2026-05-09 15:53 ` Jarkko Sakkinen
0 siblings, 1 reply; 2+ messages in thread
From: Thorsten Blum @ 2026-05-04 9:31 UTC (permalink / raw)
To: David Howells, Jarkko Sakkinen, Paul Moore, James Morris,
Serge E. Hallyn
Cc: linux-hardening, Thorsten Blum, keyrings, linux-security-module,
linux-kernel
Use kmalloc_flex() when allocating a new struct user_key_payload in
user_preparse() to replace the open-coded size arithmetic and to keep
the size type-safe.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
security/keys/user_defined.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
index 686d56e4cc85..6f88b507f927 100644
--- a/security/keys/user_defined.c
+++ b/security/keys/user_defined.c
@@ -64,7 +64,7 @@ int user_preparse(struct key_preparsed_payload *prep)
if (datalen == 0 || datalen > 32767 || !prep->data)
return -EINVAL;
- upayload = kmalloc(sizeof(*upayload) + datalen, GFP_KERNEL);
+ upayload = kmalloc_flex(*upayload, data, datalen);
if (!upayload)
return -ENOMEM;
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RESEND] keys: use kmalloc_flex in user_preparse
2026-05-04 9:31 [PATCH RESEND] keys: use kmalloc_flex in user_preparse Thorsten Blum
@ 2026-05-09 15:53 ` Jarkko Sakkinen
0 siblings, 0 replies; 2+ messages in thread
From: Jarkko Sakkinen @ 2026-05-09 15:53 UTC (permalink / raw)
To: Thorsten Blum
Cc: David Howells, Paul Moore, James Morris, Serge E. Hallyn,
linux-hardening, keyrings, linux-security-module, linux-kernel
On Mon, May 04, 2026 at 11:31:00AM +0200, Thorsten Blum wrote:
> Use kmalloc_flex() when allocating a new struct user_key_payload in
> user_preparse() to replace the open-coded size arithmetic and to keep
> the size type-safe.
>
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
> ---
> security/keys/user_defined.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
> index 686d56e4cc85..6f88b507f927 100644
> --- a/security/keys/user_defined.c
> +++ b/security/keys/user_defined.c
> @@ -64,7 +64,7 @@ int user_preparse(struct key_preparsed_payload *prep)
> if (datalen == 0 || datalen > 32767 || !prep->data)
> return -EINVAL;
>
> - upayload = kmalloc(sizeof(*upayload) + datalen, GFP_KERNEL);
> + upayload = kmalloc_flex(*upayload, data, datalen);
> if (!upayload)
> return -ENOMEM;
>
applied, thanks
BR, Jarkko
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