From: David Miller <davem@davemloft.net>
To: arnd@arndb.de
Cc: mchehab@kernel.org, jiri@resnulli.us,
arend.vanspriel@broadcom.com, kvalo@codeaurora.org,
aryabinin@virtuozzo.com, glider@google.com, dvyukov@google.com,
yamada.masahiro@socionext.com, mmarek@suse.com,
akpm@linux-foundation.org, keescook@chromium.org,
geert@linux-m68k.org, gregkh@linuxfoundation.org,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
brcm80211-dev-list.pdl@broadcom.com,
brcm80211-dev-list@cypress.com, kasan-dev@googlegroups.com,
linux-kbuild@vger.kernel.org, jakub@gcc.gnu.org,
marxin@gcc.gnu.org, stable@vger.kernel.org
Subject: Re: [PATCH v4 8/9] netlink: fix nla_put_{u8,u16,u32} for KASAN
Date: Mon, 25 Sep 2017 20:19:51 -0700 (PDT) [thread overview]
Message-ID: <20170925.201951.1512252559012166718.davem@davemloft.net> (raw)
In-Reply-To: <20170922212930.620249-9-arnd@arndb.de>
From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 22 Sep 2017 23:29:19 +0200
> When CONFIG_KASAN is enabled, the "--param asan-stack=1" causes rather large
> stack frames in some functions. This goes unnoticed normally because
> CONFIG_FRAME_WARN is disabled with CONFIG_KASAN by default as of commit
> 3f181b4d8652 ("lib/Kconfig.debug: disable -Wframe-larger-than warnings with
> KASAN=y").
>
> The kernelci.org build bot however has the warning enabled and that led
> me to investigate it a little further, as every build produces these warnings:
>
> net/wireless/nl80211.c:4389:1: warning: the frame size of 2240 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> net/wireless/nl80211.c:1895:1: warning: the frame size of 3776 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> net/wireless/nl80211.c:1410:1: warning: the frame size of 2208 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> net/bridge/br_netlink.c:1282:1: warning: the frame size of 2544 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>
> Most of this problem is now solved in gcc-8, which can consolidate
> the stack slots for the inline function arguments. On older compilers
> we can add a workaround by declaring a local variable in each function
> to pass the inline function argument.
>
> Cc: stable@vger.kernel.org
> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Applied.
next prev parent reply other threads:[~2017-09-26 3:19 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-22 21:29 [PATCH v4 0/9] bring back stack frame warning with KASAN Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` [PATCH v4 1/9] brcmsmac: make some local variables 'static const' to reduce stack size Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-25 4:33 ` Kalle Valo
2017-09-25 4:33 ` Kalle Valo
2017-10-02 13:53 ` [v4, " Kalle Valo
2017-10-02 13:53 ` Kalle Valo
2017-10-02 13:53 ` Kalle Valo
2017-09-22 21:29 ` [PATCH v4 2/9] brcmsmac: split up wlc_phy_workarounds_nphy Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-10-02 13:55 ` [v4,2/9] " Kalle Valo
2017-10-02 13:55 ` Kalle Valo
2017-10-02 13:55 ` Kalle Valo
2017-10-27 7:51 ` Kalle Valo
2017-10-27 7:51 ` Kalle Valo
2017-10-27 7:51 ` Kalle Valo
2017-09-22 21:29 ` [PATCH v4 3/9] brcmsmac: reindent split functions Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` [PATCH v4 4/9] em28xx: fix em28xx_dvb_init for KASAN Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-25 14:41 ` David Laight
2017-09-25 14:41 ` David Laight
2017-09-26 6:32 ` Arnd Bergmann
2017-09-26 6:32 ` Arnd Bergmann
2017-09-26 6:47 ` Arnd Bergmann
2017-09-26 6:47 ` Arnd Bergmann
2017-09-26 16:49 ` Andrey Ryabinin
2017-09-26 16:49 ` Andrey Ryabinin
2017-09-27 13:26 ` Arnd Bergmann
2017-09-27 13:26 ` Arnd Bergmann
2017-09-28 13:09 ` Andrey Ryabinin
2017-09-28 13:09 ` Andrey Ryabinin
2017-09-28 14:30 ` Arnd Bergmann
2017-09-28 14:30 ` Arnd Bergmann
2017-10-02 8:33 ` Arnd Bergmann
2017-10-02 8:33 ` Arnd Bergmann
2017-10-02 8:40 ` [PATCH] string.h: work around for increased stack usage Arnd Bergmann
2017-10-02 9:02 ` Arnd Bergmann
2017-10-02 14:07 ` Andrey Ryabinin
2017-10-03 18:10 ` kbuild test robot
2017-10-03 18:10 ` kbuild test robot
2017-09-22 21:29 ` [PATCH v4 5/9] r820t: fix r820t_write_reg for KASAN Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` [PATCH v4 6/9] dvb-frontends: fix i2c access helpers " Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-22 21:29 ` [PATCH v4 7/9] rocker: fix rocker_tlv_put_* functions " Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-26 3:19 ` David Miller
2017-09-22 21:29 ` [PATCH v4 8/9] netlink: fix nla_put_{u8,u16,u32} " Arnd Bergmann
2017-09-22 21:29 ` Arnd Bergmann
2017-09-26 3:19 ` David Miller [this message]
2017-09-22 21:29 ` [PATCH v4 9/9] kasan: rework Kconfig settings Arnd Bergmann
2017-09-26 19:36 ` Andrey Ryabinin
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