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Message-ID: <201602011207.TJT5d9hK%fengguang.wu@intel.com>
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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