In the Linux kernel, the following vulnerability has been resolved: tools/rtla: Fix clang warning about mountpoint var size clang is reporting this warning: $ make HOSTCC=clang CC=clang LLVMIAS=1 [...] clang -O -g -DVERSION=\"6.8.0-rc3\" -flto=auto -fexceptions -fstack-protector-strong -fasynchronous-unwind-tables -fstack-clash-protection -Wall -Werror=format-security -Wp,-DFORTIFYSOURCE=2 -Wp,-DGLIBCXXASSERTIONS $(pkg-config --cflags libtracefs) -c -o src/utils.o src/utils.c src/utils.c:548:66: warning: 'fscanf' may overflow; destination buffer in argument 3 has size 1024, but the corresponding specifier may require size 1025 [-Wfortify-source] 548 | while (fscanf(fp, "%s %" STR(MAX_PATH) "s %99s %s %d %d\n", mountpoint, type) == 2) { | ^ Increase mountpoint variable size to MAX_PATH+1 to avoid the overflow.