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Dear contributor, our automatic CI has detected problems related to your patch.
Please find below some details about it. If you have any questions, please
follow up on linaro-toolchain@lists.linaro.org mailing list.
In CI config tcwg_kernel/llvm-master-aarch64-mainline-allyesconfig after:
| commit 0c9c9dd9a24f9d715d950fef0ac7aae01437af96
| Author: Takuya Shimizu <shimizu2486@gmail.com>
| Date: Sat Aug 26 14:41:05 2023 +0900
|
| [clang][Sema] Add truncation warning on fortified snprintf
|
| This patch warns on snprintf calls whose n argument is known to be smaller than the size of the formatted string like
|
| ```
| char buf[5];
| ... 7 lines of the commit log omitted.
Results changed to
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_kernel_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
22000
# First few build errors in logs:
# 00:07:50 lib/test_scanf.c:661:2: error: implicit conversion from 'int' to 'unsigned char' changes value from -168 to 88 [-Werror,-Wconstant-conversion]
# 00:07:50 make[3]: *** [scripts/Makefile.build:243: lib/test_scanf.o] Error 1
# 00:10:07 drivers/video/fbdev/neofb.c:1959:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 17 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1963:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 18 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1967:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 17 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1971:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 17 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1978:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 18 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1985:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 17 [-Werror,-Wfortify-source]
# 00:10:07 drivers/video/fbdev/neofb.c:1992:3: error: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 18 [-Werror,-Wfortify-source]
# 00:10:07 make[5]: *** [scripts/Makefile.build:243: drivers/video/fbdev/neofb.o] Error 1
From
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_kernel_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
22011
-----------------8<--------------------------8<--------------------------8<--------------------------
The information below can be used to reproduce a debug environment:
Current build : https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-mainline-allyesconfig-build/82/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-mainline-allyesconfig-build/81/artifact/artifacts
Reproduce last good and first bad builds: https://git.linaro.org/toolchain/ci/interesting-commits.git/plain/llvm/sha1/0c9c9dd9a24f9d715d950fef0ac7aae01437af96/reproduction_instructions.txt
Full commit : https://github.com/llvm/llvm-project/commit/0c9c9dd9a24f9d715d950fef0ac7aae01437af96
Latest bug report status : https://linaro.atlassian.net/browse/LLVM-921
List of configurations that regressed due to this commit :
* tcwg_kernel
** llvm-master-aarch64-lts-allmodconfig
*** Failure
*** https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-lts-allmodconfig-build/66/
** llvm-master-aarch64-mainline-allmodconfig
*** Failure
*** https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-mainline-allmodconfig-build/83/
** llvm-master-aarch64-mainline-allyesconfig
*** Failure
*** https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-mainline-allyesconfig-build/82/
** llvm-master-arm-lts-allmodconfig
*** Failure
*** https://ci.linaro.org/job/tcwg_kernel--llvm-master-arm-lts-allmodconfig-build/78/
|
