From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Chaitanya Babu Talluri <tallurix.chaitanya.babu@intel.com>,
dev@dpdk.org, alejandro.lucero@netronome.com
Cc: reshma.pattan@intel.com, rmody@marvell.com, shshaikh@marvell.com,
beilei.xing@intel.com, qi.z.zhang@intel.com,
pablo.de.lara.guarch@intel.com, declan.doherty@intel.com,
stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] drivers: fix to replace strcat with strncat
Date: Mon, 14 Jan 2019 13:29:38 +0000 [thread overview]
Message-ID: <4eefd77e-aaec-90ce-05df-f320dc01af66@intel.com> (raw)
In-Reply-To: <1547445875-24601-1-git-send-email-tallurix.chaitanya.babu@intel.com>
On 1/14/2019 6:04 AM, Chaitanya Babu Talluri wrote:
> Strcat does not check the destination length and there might be
> chances of string overflow so insted of strcat, strncat is used.
>
> Fixes: 540a211084 ("bnx2x: driver core")
> Fixes: e163c18a15 ("net/i40e: update ptype and pctype info")
> Fixes: ef28aa96e5 ("net/nfp: support multiprocess")
> Fixes: 6f4eec2565 ("test/crypto: enhance scheduler unit tests")
> Cc: stable@dpdk.org
>
> Signed-off-by: Chaitanya Babu Talluri <tallurix.chaitanya.babu@intel.com>
<...>
> @@ -685,11 +687,11 @@ nfp_acquire_secondary_process_lock(struct nfp_pcie_user *desc)
> * driver is used because that implies root user.
> */
> home_path = getenv("HOME");
> - lockfile = calloc(strlen(home_path) + strlen(lockname) + 1,
> + lockfile = calloc(LOCKFILE_HOME_PATH + strlen(lockname) + 1,
> sizeof(char));
>
> - strcat(lockfile, home_path);
> - strcat(lockfile, "/.lock_nfp_secondary");
> + strncat(lockfile, home_path, LOCKFILE_HOME_PATH);
> + strncat(lockfile, lockname, strlen(lockfile));
I guess this need to be 'LOCKFILE_HOME_PATH - strlen(lockfile) - 1' instead.
But also this can be implemented as 'snprintf()'
Since 'lockfile' allocated dynamically based on sizes of existing strings, using
'lockname' instead of "/.lock_nfp_secondary" will show that there won't be any
overflow but tools still may be complaining about 'strcat' usage.
next prev parent reply other threads:[~2019-01-14 13:29 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-14 6:04 Chaitanya Babu Talluri
2019-01-14 13:29 ` Ferruh Yigit [this message]
2019-01-14 16:24 ` Stephen Hemminger
2019-01-17 16:44 ` Thomas Monjalon
2019-01-14 14:21 ` Bruce Richardson
2019-01-15 1:53 ` Thomas Monjalon
2019-01-18 15:11 ` [dpdk-dev] [PATCH v2] " Chaitanya Babu Talluri
2019-01-18 15:23 ` Chaitanya Babu Talluri
2019-01-21 10:43 ` Parthasarathy, JananeeX M
2019-02-07 11:56 ` Ferruh Yigit
2019-02-07 12:08 ` Thomas Monjalon
2019-02-07 13:27 ` Bruce Richardson
2019-02-13 11:54 ` Ferruh Yigit
2019-02-27 6:02 ` [dpdk-dev] [PATCH v3] drivers: fix to replace strcat with strlcat Chaitanya Babu Talluri
2019-02-27 9:43 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2019-02-27 9:49 ` [dpdk-dev] " Bruce Richardson
2019-02-27 10:26 ` Pattan, Reshma
2019-03-05 13:14 ` [dpdk-dev] [PATCH v4] drivers: fix possible overflow with strcat Chaitanya Babu Talluri
2019-03-06 18:14 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2019-03-07 12:56 ` [dpdk-dev] [PATCH v5] " Chaitanya Babu Talluri
2019-03-13 18:39 ` Ferruh Yigit
2019-03-14 13:34 ` [dpdk-dev] [PATCH v6] drivers/net: " Chaitanya Babu Talluri
2019-03-14 13:34 ` Chaitanya Babu Talluri
2019-03-14 14:09 ` Pattan, Reshma
2019-03-14 14:09 ` Pattan, Reshma
2019-03-18 12:41 ` [dpdk-dev] [PATCH v7] drivers/net: fix possible overflow using strlcat Chaitanya Babu Talluri
2019-03-18 12:41 ` Chaitanya Babu Talluri
2019-03-20 20:18 ` Ferruh Yigit
2019-03-20 20:18 ` Ferruh Yigit
2019-03-22 7:51 ` [dpdk-dev] [PATCH v8] " Chaitanya Babu Talluri
2019-03-22 7:51 ` Chaitanya Babu Talluri
2019-03-22 8:02 ` [dpdk-dev] [EXT] " Shahed Shaikh
2019-03-22 8:02 ` Shahed Shaikh
2019-03-22 10:35 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2019-03-22 10:35 ` Ferruh Yigit
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