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Message-Id: <D4435632-785B-43AC-AE21-EC9797458F42@gmail.com>
Date: Tue, 27 Jun 2023 13:28:11 -0700
From: Yuxiao Zhang <yuxiaozh.zhang@...il.com>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: Yuxiao Zhang <yuxiaozhang@...gle.com>, 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
Thanks for the pointer, the document is very helpful. Seems that I cannot use gmail to send patches. I sent it again by git send-email. I also tested myself that the patch is well-formatted. Hopefully this time it works.
> On Jun 27, 2023, at 10:35 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
>
> On Tue, Jun 27, 2023 at 10:05:04AM -0700, Yuxiao Zhang wrote:
>> kfree(record->priv);
>> kfree(record);
>> if (rc != -EEXIST || !quiet)
>> diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
>> index ade66dbe5f39..296465b14fa9 100644
>> --- a/fs/pstore/ram.c
>> +++ b/fs/pstore/ram.c
>> @@ -20,6 +20,7 @@
>> #include <linux/compiler.h>
>> #include <linux/of.h>
>> #include <linux/of_address.h>
>> +#include <linux/mm.h>
>>
>> #include "internal.h"
>> #include "ram_internal.h"
>> @@ -268,7 +269,7 @@ static ssize_t ramoops_pstore_read(struct
>> pstore_record *record)
>> /* ECC correction notice */
>> record->ecc_notice_size = persistent_ram_ecc_string(prz, NULL, 0);
>>
>> - record->buf = kmalloc(size + record->ecc_notice_size + 1, GFP_KERNEL);
>> + record->buf = kvmalloc(size + record->ecc_notice_size + 1, GFP_KERNEL);
>> if (record->buf == NULL) {
>> size = -ENOMEM;
>> goto out;
>
> Please try emailing a patch to yourself and see if you can apply it
> afterwards. The kernel documentation has a section for how to handle
> email clients, perhaps you should read it?
>
> thanks,
>
> greg k-h
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