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| author | Ben Hutchings <ben@decadent.org.uk> | 2012-09-05 14:37:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-07 08:32:25 -0700 |
| commit | 1eafb0280d1275629da54c350c7d9842f7785577 (patch) | |
| tree | 107e662b82a4f0b6f5f910811d99bf1e4b6e70c0 /tools/hv | |
| parent | de5d66e635460e27d678df99f9cb97e263d3bbe7 (diff) | |
| download | linux-3.10-1eafb0280d1275629da54c350c7d9842f7785577.tar.gz linux-3.10-1eafb0280d1275629da54c350c7d9842f7785577.tar.bz2 linux-3.10-1eafb0280d1275629da54c350c7d9842f7785577.zip | |
tools/hv: Check for read/write errors
commit 436473bc2173499ae274d0f50111d1e355006caf upstream.
hv_kvp_daemon currently does not check whether fread() or fwrite()
succeed. Add the necessary checks. Also, remove the incorrect use of
feof() before fread().
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/hv')
| -rw-r--r-- | tools/hv/hv_kvp_daemon.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c index edab6e90038..2984ffb7bac 100644 --- a/tools/hv/hv_kvp_daemon.c +++ b/tools/hv/hv_kvp_daemon.c @@ -144,7 +144,12 @@ static void kvp_update_file(int pool) sizeof(struct kvp_record), kvp_file_info[pool].num_records, filep); - fclose(filep); + if (ferror(filep) || fclose(filep)) { + kvp_release_lock(pool); + syslog(LOG_ERR, "Failed to write file, pool: %d", pool); + exit(EXIT_FAILURE); + } + kvp_release_lock(pool); } @@ -165,12 +170,17 @@ static void kvp_update_mem_state(int pool) syslog(LOG_ERR, "Failed to open file, pool: %d", pool); exit(EXIT_FAILURE); } - while (!feof(filep)) { + for (;;) { readp = &record[records_read]; records_read += fread(readp, sizeof(struct kvp_record), ENTRIES_PER_BLOCK * num_blocks, filep); + if (ferror(filep)) { + syslog(LOG_ERR, "Failed to read file, pool: %d", pool); + exit(EXIT_FAILURE); + } + if (!feof(filep)) { /* * We have more data to read. @@ -233,12 +243,18 @@ static int kvp_file_init(void) fclose(filep); return 1; } - while (!feof(filep)) { + for (;;) { readp = &record[records_read]; records_read += fread(readp, sizeof(struct kvp_record), ENTRIES_PER_BLOCK, filep); + if (ferror(filep)) { + syslog(LOG_ERR, "Failed to read file, pool: %d", + i); + exit(EXIT_FAILURE); + } + if (!feof(filep)) { /* * We have more data to read. |