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clang: check for dirfd result

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This commit is contained in:
Zdenek Kabelac 2024-10-25 00:17:25 +02:00
parent 0fbcb3b308
commit ebc5c0cb1d
1 changed files with 3 additions and 1 deletions
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4
libdm/dm-tools/dmfilemapd.c
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@ -141,6 +141,7 @@ static int _is_open_in_pid(pid_t pid, const char *path)
char link_buf[PATH_MAX];
DIR *pid_d = NULL;
ssize_t len;
int df;
if (pid == getpid())
return 0;
@ -169,7 +170,8 @@ static int _is_open_in_pid(pid_t pid, const char *path)
while ((pid_dp = readdir(pid_d)) != NULL) {
if (pid_dp->d_name[0] == '.')
continue;
if ((len = readlinkat(dirfd(pid_d), pid_dp->d_name, link_buf,
if (((df = dirfd(pid_d)) < 0) ||
(len = readlinkat(df, pid_dp->d_name, link_buf,
(sizeof(link_buf) - 1))) < 0) {
log_error("readlink failed for " DEFAULT_PROC_DIR
"/%d/fd/.", pid);