Open file before performing checks in check_one_sharer() to avoid
file tampering.
Remove redundant access check.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@xxxxxxxxx>
---
Monitor.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/Monitor.c b/Monitor.c
index 824a69fc6b79..7cee95d4487a 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -451,20 +451,17 @@ static int check_one_sharer(int scan)
return 2;
}
- if (access(AUTOREBUILD_PID_PATH, F_OK) != 0)
- return 0;
-
- if (!is_file(AUTOREBUILD_PID_PATH)) {
- pr_err("%s is not a regular file.\n", AUTOREBUILD_PID_PATH);
- return 2;
- }
-
fp = fopen(AUTOREBUILD_PID_PATH, "r");
if (!fp) {
pr_err("Cannot open %s file.\n", AUTOREBUILD_PID_PATH);
return 2;
}
+ if (!is_file(AUTOREBUILD_PID_PATH)) {
+ pr_err("%s is not a regular file.\n", AUTOREBUILD_PID_PATH);
+ return 2;
+ }
+
if (fscanf(fp, "%d", &pid) != 1) {
pr_err("Cannot read pid from %s file.\n", AUTOREBUILD_PID_PATH);
fclose(fp);
--
2.35.3
