6.6-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Bristot de Oliveira bristot@kernel.org
commit 30369084ac6e27479a347899e74f523e6ca29b89 upstream.
clang is reporting this warning:
$ make HOSTCC=clang CC=clang LLVM_IAS=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,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS $(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", mount_point, type) == 2) { | ^
Increase mount_point variable size to MAX_PATH+1 to avoid the overflow.
Link: https://lkml.kernel.org/r/1b46712e93a2f4153909514a36016959dcc4021c.170721709...
Cc: stable@vger.kernel.org Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Nathan Chancellor nathan@kernel.org Cc: Nick Desaulniers ndesaulniers@google.com Cc: Bill Wendling morbo@google.com Cc: Justin Stitt justinstitt@google.com Cc: Donald Zickus dzickus@redhat.com Fixes: a957cbc02531 ("rtla: Add -C cgroup support") Signed-off-by: Daniel Bristot de Oliveira bristot@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/tracing/rtla/src/utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/tracing/rtla/src/utils.c +++ b/tools/tracing/rtla/src/utils.c @@ -530,7 +530,7 @@ int set_cpu_dma_latency(int32_t latency) */ static const int find_mount(const char *fs, char *mp, int sizeof_mp) { - char mount_point[MAX_PATH]; + char mount_point[MAX_PATH+1]; char type[100]; int found = 0; FILE *fp;