forked from rpms/elfutils
74 lines
2.6 KiB
Diff
74 lines
2.6 KiB
Diff
diff --git a/debuginfod/debuginfod-client.c b/debuginfod/debuginfod-client.c
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index ef4d47e3..d92d8d62 100644
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--- a/debuginfod/debuginfod-client.c
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+++ b/debuginfod/debuginfod-client.c
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@@ -248,7 +248,7 @@ debuginfod_write_callback (char *ptr, size_t size, size_t nmemb, void *data)
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/* handle config file read and write */
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static int
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-debuginfod_config_cache(char *config_path,
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+debuginfod_config_cache(debuginfod_client *c, char *config_path,
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long cache_config_default_s,
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struct stat *st)
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{
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@@ -277,17 +277,27 @@ debuginfod_config_cache(char *config_path,
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}
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long cache_config;
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+ /* PR29696 - NB: When using fdopen, the file descriptor is NOT
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+ dup'ed and will be closed when the stream is closed. Manually
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+ closing fd after fclose is called will lead to a race condition
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+ where, if reused, the file descriptor will compete for its
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+ regular use before being incorrectly closed here. */
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FILE *config_file = fdopen(fd, "r");
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if (config_file)
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{
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if (fscanf(config_file, "%ld", &cache_config) != 1)
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- cache_config = cache_config_default_s;
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- fclose(config_file);
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+ cache_config = cache_config_default_s;
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+ if (0 != fclose (config_file) && c->verbose_fd >= 0)
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+ dprintf (c->verbose_fd, "fclose failed with %s (err=%d)\n",
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+ strerror (errno), errno);
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}
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else
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- cache_config = cache_config_default_s;
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-
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- close (fd);
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+ {
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+ cache_config = cache_config_default_s;
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+ if (0 != close (fd) && c->verbose_fd >= 0)
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+ dprintf (c->verbose_fd, "close failed with %s (err=%d)\n",
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+ strerror (errno), errno);
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+ }
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return cache_config;
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}
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@@ -303,7 +313,7 @@ debuginfod_clean_cache(debuginfod_client *c,
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struct stat st;
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/* Create new interval file. */
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- rc = debuginfod_config_cache(interval_path,
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+ rc = debuginfod_config_cache(c, interval_path,
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cache_clean_default_interval_s, &st);
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if (rc < 0)
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return rc;
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@@ -320,7 +330,7 @@ debuginfod_clean_cache(debuginfod_client *c,
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utime (interval_path, NULL);
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/* Read max unused age value from config file. */
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- rc = debuginfod_config_cache(max_unused_path,
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+ rc = debuginfod_config_cache(c, max_unused_path,
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cache_default_max_unused_age_s, &st);
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if (rc < 0)
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return rc;
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@@ -1110,7 +1135,7 @@ debuginfod_query_server (debuginfod_client *c,
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close(fd); /* no need to hold onto the negative-hit file descriptor */
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- rc = debuginfod_config_cache(cache_miss_path,
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+ rc = debuginfod_config_cache(c, cache_miss_path,
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cache_miss_default_s, &st);
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if (rc < 0)
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goto out;
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