linux-hardening - Re: support pmsg record size larger than kmalloc limitation

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Message-ID: <2023062715-eldercare-washed-3c29@gregkh>
Date:   Tue, 27 Jun 2023 08:20:44 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Yuxiao Zhang <yuxiaozhang@...gle.com>
Cc:     keescook@...omium.org, tony.luck@...el.com, gpiccoli@...lia.com,
        linux-hardening@...r.kernel.org,
        William Kennington <wak@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: Re: support pmsg record size larger than kmalloc limitation

On Mon, Jun 26, 2023 at 06:20:29PM -0700, Yuxiao Zhang wrote:
> @@ -730,7 +731,7 @@ static void decompress_record(struct pstore_record *record)
>   return;
> 
>   /* Swap out compressed contents with decompressed contents. */
> - kfree(record->buf);
> + kvfree(record->buf);
>   record->buf = unzipped;
>   record->size = unzipped_len;
>   record->compressed = false;
> @@ -783,7 +784,7 @@ void pstore_get_backend_records(struct pstore_info *psi,

Patch is corrupted and can not be applied at all, please fix up your
email client to not do this.

thanks,

greg k-h