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Date: Mon, 15 Mar 2010 15:48:42 -0700 (PDT) From: David Miller <davem@...emloft.net> To: akpm@...ux-foundation.org Cc: isdn@...ux-pingi.de, netdev@...r.kernel.org, imunsie@...ibm.com, mac@...ware.de, sgayda2@...c.edu Subject: Re: [patch 2/3] i4l: silence compiler warnings for array access in Eicon DIVA ISDN driver From: akpm@...ux-foundation.org Date: Thu, 11 Mar 2010 14:07:24 -0800 > From: Ian Munsie <imunsie@...ibm.com> > > When compiling this driver, the compiler throws the following warnings: > > drivers/isdn/hardware/eicon/message.c:8426: warning: array subscript is above array bounds > drivers/isdn/hardware/eicon/message.c:8427: warning: array subscript is above array bounds > drivers/isdn/hardware/eicon/message.c:8434: warning: array subscript is above array bounds > drivers/isdn/hardware/eicon/message.c:8435: warning: array subscript is above array bounds > drivers/isdn/hardware/eicon/message.c:8436: warning: array subscript is above array bounds > drivers/isdn/hardware/eicon/message.c:8447: warning: array subscript is above array bounds > > This arises from the particular semantics the driver is using to write to > the nlc array (static byte[256]). The array has a length in byte 0 > followed by a T30_INFO struct starting at byte 1. > > The T30_INFO struct has a number of variable length strings after the > station_id entry, which cannot be explicitly defined in the struct and the > driver accesses them with an array index to station_id beyond the length > of station_id. > > This patch merely changes the semantics that the driver uses to access the > entries after the station_id entry to use the original 256 byte nlc array > taking the offset and length of the station_id entry to calculate where to > write in the array, thereby silencing the warning. > > Signed-off-by: Ian Munsie <imunsie@...ibm.com> > Cc: Armin Schindler <mac@...ware.de> > Cc: Karsten Keil <isdn@...ux-pingi.de> > Cc: Stoyan Gaydarov <sgayda2@...c.edu> > Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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