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Bruce Fields" , Arnd Bergmann , David Howells , Shuah Khan References: <20190719164225.27083-1-cyphar@cyphar.com> <20190719164225.27083-9-cyphar@cyphar.com> From: shuah Message-ID: Date: Fri, 19 Jul 2019 16:25:46 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20190719164225.27083-9-cyphar@cyphar.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190719_152553_081447_B764AD1A X-CRM114-Status: GOOD ( 20.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Alexei Starovoitov , Oleg Nesterov , linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, shuah , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Tycho Andersen , Aleksa Sarai , linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-xtensa@linux-xtensa.org, Kees Cook , Jann Horn , linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org, Andy Lutomirski , David Drysdale , Christian Brauner , linux-parisc@vger.kernel.org, linux-api@vger.kernel.org, Chanho Min , linux-kernel@vger.kernel.org, Eric Biederman , linux-alpha@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Morton , Linus Torvalds , containers@lists.linux-foundation.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 7/19/19 10:42 AM, Aleksa Sarai wrote: > Previously, using "%m" in a ksft_* format string can result in strange > output because the errno value wasn't saved before calling other libc > functions. The solution is to simply save and restore the errno before > we format the user-supplied format string. > > Signed-off-by: Aleksa Sarai > --- > tools/testing/selftests/kselftest.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h > index ec15c4f6af55..0ac49d91a260 100644 > --- a/tools/testing/selftests/kselftest.h > +++ b/tools/testing/selftests/kselftest.h > @@ -10,6 +10,7 @@ > #ifndef __KSELFTEST_H > #define __KSELFTEST_H > > +#include > #include > #include > #include > @@ -81,58 +82,68 @@ static inline void ksft_print_cnts(void) > > static inline void ksft_print_msg(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("# "); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_pass(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_pass++; > > va_start(args, msg); > printf("ok %d ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_fail(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_fail++; > > va_start(args, msg); > printf("not ok %d ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_skip(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_xskip++; > > va_start(args, msg); > printf("not ok %d # SKIP ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_error(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_error++; > > va_start(args, msg); > printf("not ok %d # error ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > @@ -152,10 +163,12 @@ static inline int ksft_exit_fail(void) > > static inline int ksft_exit_fail_msg(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("Bail out! "); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > > @@ -178,10 +191,12 @@ static inline int ksft_exit_xpass(void) > static inline int ksft_exit_skip(const char *msg, ...) > { > if (msg) { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("not ok %d # SKIP ", 1 + ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } else { > Hi Aleksa, Can you send this patch separate from the patch series. I will apply this as bug fix to 5.3-rc2 or rc3. This isn't part of this series anyway and I would like to get this in right away. thanks, -- Shuah _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel