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Date: Mon, 25 Sep 2017 20:19:44 -0700 (PDT) From: David Miller <davem@...emloft.net> To: arnd@...db.de Cc: jiri@...nulli.us, mchehab@...nel.org, arend.vanspriel@...adcom.com, kvalo@...eaurora.org, aryabinin@...tuozzo.com, glider@...gle.com, dvyukov@...gle.com, yamada.masahiro@...ionext.com, mmarek@...e.com, akpm@...ux-foundation.org, keescook@...omium.org, geert@...ux-m68k.org, gregkh@...uxfoundation.org, linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, linux-wireless@...r.kernel.org, brcm80211-dev-list.pdl@...adcom.com, brcm80211-dev-list@...ress.com, kasan-dev@...glegroups.com, linux-kbuild@...r.kernel.org, jakub@....gnu.org, marxin@....gnu.org, stable@...r.kernel.org Subject: Re: [PATCH v4 7/9] rocker: fix rocker_tlv_put_* functions for KASAN From: Arnd Bergmann <arnd@...db.de> Date: Fri, 22 Sep 2017 23:29:18 +0200 > Inlining these functions creates lots of stack variables that each take > 64 bytes when KASAN is enabled, leading to this warning about potential > stack overflow: > > drivers/net/ethernet/rocker/rocker_ofdpa.c: In function 'ofdpa_cmd_flow_tbl_add': > drivers/net/ethernet/rocker/rocker_ofdpa.c:621:1: error: the frame size of 2752 bytes is larger than 1536 bytes [-Werror=frame-larger-than=] > > gcc-8 can now consolidate the stack slots itself, but on older versions > we get the same behavior by using a temporary variable that holds a > copy of the inline function argument. > > Cc: stable@...r.kernel.org > Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 > Signed-off-by: Arnd Bergmann <arnd@...db.de> Applied.
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