From: Lee Jones <lee.jones@linaro.org>
To: arnd@arndb.de, gregkh@linuxfoundation.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Lee Jones <lee.jones@linaro.org>,
Kees Cook <keescook@chromium.org>
Subject: [PATCH 04/10] misc: lkdtm: bugs: At least try to use popuated variable
Date: Fri, 26 Jun 2020 14:05:19 +0100 [thread overview]
Message-ID: <20200626130525.389469-5-lee.jones@linaro.org> (raw)
In-Reply-To: <20200626130525.389469-1-lee.jones@linaro.org>
The result may not be intereresting, but not using a set variable
is bad form and causes W=1 kernel builds to complain.
Fixes the following W=1 warning(s):
drivers/misc/lkdtm/bugs.c: In function ‘lkdtm_STACK_GUARD_PAGE_LEADING’:
drivers/misc/lkdtm/bugs.c:331:25: warning: variable ‘byte’ set but not used [-Wunused-but-set-variable]
331 | volatile unsigned char byte;
| ^~~~
drivers/misc/lkdtm/bugs.c: In function ‘lkdtm_STACK_GUARD_PAGE_TRAILING’:
drivers/misc/lkdtm/bugs.c:345:25: warning: variable ‘byte’ set but not used [-Wunused-but-set-variable]
345 | volatile unsigned char byte;
| ^~~~
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/misc/lkdtm/bugs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c
index 736675f0a2464..4f94296fc58ad 100644
--- a/drivers/misc/lkdtm/bugs.c
+++ b/drivers/misc/lkdtm/bugs.c
@@ -334,7 +334,7 @@ void lkdtm_STACK_GUARD_PAGE_LEADING(void)
byte = *ptr;
- pr_err("FAIL: accessed page before stack!\n");
+ pr_err("FAIL: accessed page before stack! (byte: %x)\n", byte);
}
/* Test that VMAP_STACK is actually allocating with a trailing guard page */
@@ -348,7 +348,7 @@ void lkdtm_STACK_GUARD_PAGE_TRAILING(void)
byte = *ptr;
- pr_err("FAIL: accessed page after stack!\n");
+ pr_err("FAIL: accessed page after stack! (byte: %x)\n", byte);
}
void lkdtm_UNSET_SMEP(void)
--
2.25.1
next prev parent reply other threads:[~2020-06-26 13:05 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 13:05 [PATCH 00/10] Fix a bunch of W=1 warnings in Misc Lee Jones
2020-06-26 13:05 ` [PATCH 01/10] misc: c2port: core: Ensure source size does not equal destination size in strncpy() Lee Jones
2020-06-26 13:15 ` Rodolfo Giometti
2020-07-13 19:10 ` Geert Uytterhoeven
2020-07-14 7:46 ` Lee Jones
2020-07-14 7:52 ` Geert Uytterhoeven
2020-07-14 8:01 ` Lee Jones
2020-07-14 8:02 ` Geert Uytterhoeven
2020-06-26 13:05 ` [PATCH 02/10] misc: ti-st: st_core: Tidy-up bespoke commentry Lee Jones
2020-06-26 14:05 ` Arnd Bergmann
2020-06-26 13:05 ` [PATCH 03/10] misc: ti-st: st_kim: " Lee Jones
2020-06-26 14:06 ` Arnd Bergmann
2020-06-26 13:05 ` Lee Jones [this message]
2020-06-26 14:37 ` [PATCH 04/10] misc: lkdtm: bugs: At least try to use popuated variable Arnd Bergmann
2020-06-26 15:26 ` Kees Cook
2020-06-26 13:05 ` [PATCH 05/10] misc: lkdtm: Always provide prototype for lkdtm_DOUBLE_FAULT() Lee Jones
2020-06-26 14:37 ` Arnd Bergmann
2020-06-26 15:23 ` Kees Cook
2020-06-26 13:05 ` [PATCH 06/10] misc: eeprom: eeprom_93cx6: Repair function arg descriptions Lee Jones
2020-06-26 14:38 ` Arnd Bergmann
2020-06-27 20:33 ` Wolfram Sang
2020-06-29 8:14 ` Lee Jones
2020-06-29 8:20 ` Wolfram Sang
2020-06-29 8:46 ` Lee Jones
2020-06-26 13:05 ` [PATCH 07/10] misc: mic: vop: vop_main: Remove set but unused variable 'ret' Lee Jones
2020-06-26 14:39 ` Arnd Bergmann
2020-06-26 15:29 ` Lee Jones
2020-06-26 18:38 ` Arnd Bergmann
2020-06-26 13:05 ` [PATCH 08/10] misc: cb710: sgbuf2: Add missing documentation for cb710_sg_dwiter_write_next_block()'s 'data' arg Lee Jones
2020-06-26 14:39 ` Arnd Bergmann
2020-06-26 16:46 ` Michał Mirosław
2020-06-26 13:05 ` [PATCH 09/10] misc: habanalabs: irq: Add missing struct identifier for 'struct hl_eqe_work' Lee Jones
2020-06-26 13:45 ` Oded Gabbay
2020-06-26 13:46 ` Oded Gabbay
2020-06-26 13:05 ` [PATCH 10/10] misc: pti: Fix documentation for bit-rotted function pti_tty_driver_write() Lee Jones
2020-06-26 14:40 ` Arnd Bergmann
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