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commit 59158656f3b0b99d8784ddc82c15778813000edc
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Author: Frank Ch. Eigler <fche@redhat.com>
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Date: Wed May 4 10:26:42 2022 -0400
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PR29117: fix fd leak in debuginfod client for cache-miss files
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Correct a nasty fd leak and a few less nasty leaks in the debuginfod
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client code. The nasty one impacts long-lived apps such as debuginfod
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servers.
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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Signed-off-by: Frank Ch. Eigler <fche@redhat.com>
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diff --git a/debuginfod/debuginfod-client.c b/debuginfod/debuginfod-client.c
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index ea6e461a..521972e4 100644
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--- a/debuginfod/debuginfod-client.c
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+++ b/debuginfod/debuginfod-client.c
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@@ -243,7 +243,13 @@ debuginfod_config_cache(char *config_path,
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return -errno;
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if (dprintf(fd, "%ld", cache_config_default_s) < 0)
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- return -errno;
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+ {
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+ int ret = -errno;
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+ close (fd);
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+ return ret;
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+ }
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+
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+ close (fd);
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}
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long cache_config;
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@@ -284,7 +290,13 @@ debuginfod_init_cache (char *cache_path, char *interval_path, char *maxage_path)
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return -errno;
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if (dprintf(fd, "%ld", cache_clean_default_interval_s) < 0)
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- return -errno;
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+ {
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+ int ret = -errno;
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+ close (fd);
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+ return ret;
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+ }
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+
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+ close (fd);
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/* init max age config file. */
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if (stat(maxage_path, &st) != 0
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@@ -292,8 +304,13 @@ debuginfod_init_cache (char *cache_path, char *interval_path, char *maxage_path)
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return -errno;
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if (dprintf(fd, "%ld", cache_default_max_unused_age_s) < 0)
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- return -errno;
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+ {
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+ int ret = -errno;
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+ close (fd);
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+ return ret;
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+ }
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+ close (fd);
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return 0;
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}
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@@ -812,18 +829,17 @@ debuginfod_query_server (debuginfod_client *c,
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has passed since the last attempt. */
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time_t cache_miss;
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time_t target_mtime = st.st_mtime;
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+
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+ close(fd); /* no need to hold onto the negative-hit file descriptor */
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+
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rc = debuginfod_config_cache(cache_miss_path,
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cache_miss_default_s, &st);
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if (rc < 0)
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- {
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- close(fd);
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- goto out;
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- }
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+ goto out;
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cache_miss = (time_t)rc;
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if (time(NULL) - target_mtime <= cache_miss)
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{
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- close(fd);
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rc = -ENOENT;
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goto out;
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}
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diff --git a/debuginfod/debuginfod-find.c b/debuginfod/debuginfod-find.c
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index 3e8ab203..f60b5463 100644
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--- a/debuginfod/debuginfod-find.c
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+++ b/debuginfod/debuginfod-find.c
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@@ -231,6 +231,8 @@ main(int argc, char** argv)
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fprintf(stderr, "Server query failed: %s\n", strerror(-rc));
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return 1;
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}
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+ else
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+ close (rc);
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printf("%s\n", cache_name);
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free (cache_name);
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