https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103685
--- Comment #2 from Vitaly Chikunov <vt at altlinux dot org> --- Created attachment 51995 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51995&action=edit reproducer created with -save-temps gost-engine (master *)$ gcc -v -DHAVE_ADDCARRY_U64 -DL_ENDIAN -O2 -g -fanalyzer -fPIC -Werror -Wall -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Wno-error=unknown-pragmas -Wno-error=pragmas -Wno-deprecated-declarations -std=gnu90 gost_ec_sign.c.i Using built-in specs. COLLECT_GCC=x86_64-alt-linux-gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-alt-linux/11/lto-wrapper Target: x86_64-alt-linux Configured with: ../configure --host=x86_64-alt-linux --build=x86_64-alt-linux --target=x86_64-alt-linux --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var/lib --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info --disable-dependency-tracking --disable-silent-rules --without-included-gettext --enable-shared --program-suffix=-11 --with-slibdir=/lib64 --libexecdir=/usr/lib64 --with-bugurl=http://bugzilla.altlinux.org --enable-__cxa_atexit --enable-threads=posix --enable-checking=release --with-system-zlib --without-included-gettext --enable-multilib --enable-default-pie --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --with-arch_32=i586 --with-tune_32=generic --with-multilib-list=m64,m32,mx32 --with-gcc-major-version-only --enable-vtable-verify --enable-bootstrap --with-build-config=bootstrap-lto --enable-link-serialization=1 --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,lto --enable-plugin Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.2.1 20210911 (ALT Sisyphus 11.2.1-alt1) (GCC) COLLECT_GCC_OPTIONS='-v' '-D' 'HAVE_ADDCARRY_U64' '-D' 'L_ENDIAN' '-O2' '-g' '-fanalyzer' '-fPIC' '-Werror' '-Wall' '-Wno-unused-parameter' '-Wno-unused-function' '-Wno-missing-braces' '-Wno-error=unknown-pragmas' '-Wno-error=pragmas' '-Wno-deprecated-declarations' '-std=gnu90' '-mtune=generic' '-march=x86-64' '-dumpdir' 'a-' /usr/lib64/gcc/x86_64-alt-linux/11/cc1 -fpreprocessed gost_ec_sign.c.i -fstack-protector-strong -fstack-clash-protection -quiet -dumpdir a- -dumpbase gost_ec_sign.c.i -dumpbase-ext .i -mtune=generic -march=x86-64 -g -O2 -Werror -Wall -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Wno-error=unknown-pragmas -Wno-error=pragmas -Wno-deprecated-declarations -std=gnu90 -version -fanalyzer -fPIC -o /tmp/.private/vt/ccyb8qr0.s GNU C89 (GCC) version 11.2.1 20210911 (ALT Sisyphus 11.2.1-alt1) (x86_64-alt-linux) compiled by GNU C version 11.2.1 20210911 (ALT Sisyphus 11.2.1-alt1), GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version none GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C89 (GCC) version 11.2.1 20210911 (ALT Sisyphus 11.2.1-alt1) (x86_64-alt-linux) compiled by GNU C version 11.2.1 20210911 (ALT Sisyphus 11.2.1-alt1), GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version none GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: aff18b076d6b4cd27f175dbe6da41edc /home/vt/src/gost-engine/gost_ec_sign.c: In function ‘fill_GOST_EC_params’: /home/vt/src/gost-engine/gost_ec_sign.c:105:15: error: dereference of NULL ‘params’ [CWE-476] [-Werror=analyzer-null-dereference] 105 | if (params->group) { | ~~~~~~^~~~~~~ ‘fill_GOST_EC_params’: events 1-3 | | 100 | if (!eckey || !params) { | | ^ | | | | | (1) following ‘false’ branch... |...... | 105 | if (params->group) { | | ~~ ~~~~~~~~~~~~~ | | | | | | | (3) dereference of NULL ‘params’ | | (2) ...to here | cc1: all warnings being treated as errors
