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| author | Lee Jones <lee.jones@linaro.org> | 2020-06-26 14:05:19 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-29 18:45:52 +0200 |
| commit | f049c545465de225d0ceb036b2dd08c5cfd31344 (patch) | |
| tree | fb2ec39af8d6c6cac54a09f76b8d9644343431b7 /drivers/misc/lkdtm | |
| parent | 3caf1b48397f2de0dab88d5b2daf002159ed30bd (diff) | |
| download | linux-f049c545465de225d0ceb036b2dd08c5cfd31344.tar.gz | |
misc: lkdtm: bugs: At least try to use popuated variable
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> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20200626130525.389469-5-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/lkdtm')
| -rw-r--r-- | drivers/misc/lkdtm/bugs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c index 10338800f6be..4dfbfd51bdf7 100644 --- a/drivers/misc/lkdtm/bugs.c +++ b/drivers/misc/lkdtm/bugs.c @@ -333,7 +333,7 @@ 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 */ @@ -347,7 +347,7 @@ 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) |