linux-kernel - Re: [PATCH] hfs: if match_strdup() fails to allocate memory in parse

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 22 Apr 2008 14:17:24 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jesper Juhl <jesper.juhl@...il.com>
Cc:	Roman Zippel <zippel@...ux-m68k.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hfs: if match_strdup() fails to allocate memory in
	parse_options(), don't blow up the kernel.

On Tue, 2008-04-22 at 23:12 +0200, Jesper Juhl wrote:
> From: Jesper Juhl <jesper.juhl@...il.com>
> diff --git a/fs/hfs/super.c b/fs/hfs/super.c
> index 32de44e..221e314 100644
> --- a/fs/hfs/super.c
> +++ b/fs/hfs/super.c
> @@ -297,6 +297,10 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
>  				return 0;
>  			}
>  			p = match_strdup(&args[0]);
> +			if (!p) {
> +				printk(KERN_ERR "hfs: mem alloc failed in match_strdup()\n");
> +				return 0;
> +			}
>  			hsb->nls_disk = load_nls(p);
>  			if (!hsb->nls_disk) {
>  				printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p);
> @@ -311,6 +315,10 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
>  				return 0;
>  			}
>  			p = match_strdup(&args[0]);
> +			if (!p) {
> +				printk(KERN_ERR "hfs: memory allocation failed in match_strdup()\n");
> +				return 0;
> +			}
>  			hsb->nls_io = load_nls(p);
>  			if (!hsb->nls_io) {
>  				printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p);
> 

Using different strings in the printk wastes memory.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/