linux-kernel - drivers/staging/rtl8723au/core/rtw_security.c:529:1: warning: the frame size of 1076 bytes is larger than 1024 bytes

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Date:	Mon, 1 Feb 2016 12:29:11 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: drivers/staging/rtl8723au/core/rtw_security.c:529:1: warning: the
 frame size of 1076 bytes is larger than 1024 bytes

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   36f90b0a2ddd60823fe193a85e60ff1906c2a9b3
commit: c6d308534aef6c99904bf5862066360ae067abc4 UBSAN: run-time undefined behavior sanity checker
date:   11 days ago
config: i386-randconfig-h1-02011158 (attached as .config)
reproduce:
        git checkout c6d308534aef6c99904bf5862066360ae067abc4
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/staging/rtl8723au/core/rtw_security.c: In function 'phase1':
>> drivers/staging/rtl8723au/core/rtw_security.c:529:1: warning: the frame size of 1076 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    }
    ^

vim +529 drivers/staging/rtl8723au/core/rtw_security.c

5e93f352 Larry Finger    2014-03-28  513  	p1k[2]      = Mk16(ta[1], ta[0]); /* use TA[] as little-endian */
5e93f352 Larry Finger    2014-03-28  514  	p1k[3]      = Mk16(ta[3], ta[2]);
5e93f352 Larry Finger    2014-03-28  515  	p1k[4]      = Mk16(ta[5], ta[4]);
5e93f352 Larry Finger    2014-03-28  516  
5e93f352 Larry Finger    2014-03-28  517  	/* Now compute an unbalanced Feistel cipher with 80-bit block */
5e93f352 Larry Finger    2014-03-28  518  	/* size on the 80-bit block P1K[], using the 128-bit key TK[] */
5db8bee6 Tina Ruchandani 2014-10-23  519  	for (i = 0; i < PHASE1_LOOP_CNT; i++) {
5db8bee6 Tina Ruchandani 2014-10-23  520  		/* Each add operation here is mod 2**16 */
5e93f352 Larry Finger    2014-03-28  521  		p1k[0] += _S_(p1k[4] ^ TK16((i & 1) + 0));
5e93f352 Larry Finger    2014-03-28  522  		p1k[1] += _S_(p1k[0] ^ TK16((i & 1) + 2));
5e93f352 Larry Finger    2014-03-28  523  		p1k[2] += _S_(p1k[1] ^ TK16((i & 1) + 4));
5e93f352 Larry Finger    2014-03-28  524  		p1k[3] += _S_(p1k[2] ^ TK16((i & 1) + 6));
5e93f352 Larry Finger    2014-03-28  525  		p1k[4] += _S_(p1k[3] ^ TK16((i & 1) + 0));
5e93f352 Larry Finger    2014-03-28  526  		p1k[4] +=  (unsigned short) i; /* avoid "slide attacks" */
5e93f352 Larry Finger    2014-03-28  527  		}
5e93f352 Larry Finger    2014-03-28  528  
5e93f352 Larry Finger    2014-03-28 @529  }
5e93f352 Larry Finger    2014-03-28  530  
5e93f352 Larry Finger    2014-03-28  531  /*
5e93f352 Larry Finger    2014-03-28  532  **********************************************************************
5e93f352 Larry Finger    2014-03-28  533  * Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16
5e93f352 Larry Finger    2014-03-28  534  *
5e93f352 Larry Finger    2014-03-28  535  * Inputs:
5e93f352 Larry Finger    2014-03-28  536  *     tk[]      = Temporal key                         [128 bits]
5e93f352 Larry Finger    2014-03-28  537  *     p1k[]     = Phase 1 output key                   [ 80 bits]

:::::: The code at line 529 was first introduced by commit
:::::: 5e93f35209578fcabfa855e427354195e54b491f staging: r8723au: Add source files for new driver - part 1

:::::: TO: Larry Finger <Larry.Finger@...inger.net>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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