From 8af3d8d5bc75914a01fe41839474902f2c6b79b9 Mon Sep 17 00:00:00 2001 From: Ferenc Wagner Date: Thu, 25 Aug 2011 14:44:57 +0200 Subject: [SCSI] fusion: ensure NUL-termination of MptCallbacksName elements Using strlcpy instead of memcpy makes the strlen() calls superfluous and also ensures zero-termination of the copied string. At the same time get rid of the magic constant 50. Actually, I can't see why copying the callback name is necessary instead of simply storing a pointer to it (just like to the callback function itself), but that goes beyond the scope of this fix. Signed-off-by: Ferenc Wagner Acked-by: "Nandigama, Nagalakshmi" Signed-off-by: James Bottomley --- drivers/message/fusion/mptbase.c | 7 ++++--- drivers/message/fusion/mptbase.h | 1 + 2 files changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/message') diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c index e9c6a6047a0..a7dc4672d99 100644 --- a/drivers/message/fusion/mptbase.c +++ b/drivers/message/fusion/mptbase.c @@ -115,7 +115,8 @@ module_param(mpt_fwfault_debug, int, 0600); MODULE_PARM_DESC(mpt_fwfault_debug, "Enable detection of Firmware fault and halt Firmware on fault - (default=0)"); -static char MptCallbacksName[MPT_MAX_PROTOCOL_DRIVERS][50]; +static char MptCallbacksName[MPT_MAX_PROTOCOL_DRIVERS] + [MPT_MAX_CALLBACKNAME_LEN+1]; #ifdef MFCNT static int mfcounter = 0; @@ -717,8 +718,8 @@ mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass, char *func_name) MptDriverClass[cb_idx] = dclass; MptEvHandlers[cb_idx] = NULL; last_drv_idx = cb_idx; - memcpy(MptCallbacksName[cb_idx], func_name, - strlen(func_name) > 50 ? 50 : strlen(func_name)); + strlcpy(MptCallbacksName[cb_idx], func_name, + MPT_MAX_CALLBACKNAME_LEN+1); break; } } diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h index b4d24dc081a..76c05bc24cb 100644 --- a/drivers/message/fusion/mptbase.h +++ b/drivers/message/fusion/mptbase.h @@ -89,6 +89,7 @@ */ #define MPT_MAX_ADAPTERS 18 #define MPT_MAX_PROTOCOL_DRIVERS 16 +#define MPT_MAX_CALLBACKNAME_LEN 49 #define MPT_MAX_BUS 1 /* Do not change */ #define MPT_MAX_FC_DEVICES 255 #define MPT_MAX_SCSI_DEVICES 16 -- cgit v1.2.3-70-g09d2