6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
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.1707217097.git.bristot@xxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Bill Wendling <morbo@xxxxxxxxxx>
Cc: Justin Stitt <justinstitt@xxxxxxxxxx>
Cc: Donald Zickus <dzickus@xxxxxxxxxx>
Fixes: a957cbc02531 ("rtla: Add -C cgroup support")
Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
