Buildresult: linus/malta_defconfig/mips-gcc8 built on Sep 16 2021, 09:58

kisskb

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Status:	OK
Date/Time:	Sep 16 2021, 09:58
Duration:	0:01:38.287186
Builder:	ka7
Revision:	qnx4: avoid stringop-overread errors (`b7213ffa0e585feb1aee3e7173e965e66ee0abaa)`
Target:	linus/malta_defconfig/mips-gcc8
Branch:	linus
Compiler:	mips-gcc8 (mips-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	malta_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify b7213ffa0e585feb1aee3e7173e965e66ee0abaa^{commit} b7213ffa0e585feb1aee3e7173e965e66ee0abaa already have revision, skipping fetch # git checkout -q -f -B kisskb b7213ffa0e585feb1aee3e7173e965e66ee0abaa # git clean -qxdf # < git log -1 # commit b7213ffa0e585feb1aee3e7173e965e66ee0abaa # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Wed Sep 15 13:56:37 2021 -0700 # # qnx4: avoid stringop-overread errors # # The qnx4 directory entries are 64-byte blocks that have different # contents depending on the a status byte that is in the last byte of the # block. # # In particular, a directory entry can be either a "link info" entry with # a 48-byte name and pointers to the real inode information, or an "inode # entry" with a smaller 16-byte name and the full inode information. # # But the code was written to always just treat the directory name as if # it was part of that "inode entry", and just extend the name to the # longer case if the status byte said it was a link entry. # # That work just fine and gives the right results, but now that gcc is # tracking data structure accesses much more, the code can trigger a # compiler error about using up to 48 bytes (the long name) in a structure # that only has that shorter name in it: # # fs/qnx4/dir.c: In function ‘qnx4_readdir’: # fs/qnx4/dir.c:51:32: error: ‘strnlen’ specified bound 48 exceeds source size 16 [-Werror=stringop-overread] # 51 \| size = strnlen(de->di_fname, size); # \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~ # In file included from fs/qnx4/qnx4.h:3, # from fs/qnx4/dir.c:16: # include/uapi/linux/qnx4_fs.h:45:25: note: source object declared here # 45 \| char di_fname[QNX4_SHORT_NAME_MAX]; # \| ^~~~~~~~ # # which is because the source code doesn't really make this whole "one of # two different types" explicit. # # Fix this by introducing a very explicit union of the two types, and # basically explaining to the compiler what is really going on. # # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-ld --version # < git log --format=%s --max-count=1 b7213ffa0e585feb1aee3e7173e965e66ee0abaa # < make -s -j 32 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- malta_defconfig # < make -s -j 32 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- help # make -s -j 32 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- olddefconfig # make -s -j 32 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- Completed OK # rm -rf /kisskb/build/linus_malta_defconfig_mips-gcc8 # Build took: 0:01:38.287186

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