This is a note to let you know that I've just added the patch titled
tools/hv: Check for read/write errors
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tools-hv-check-for-read-write-errors.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 436473bc2173499ae274d0f50111d1e355006caf Mon Sep 17 00:00:00 2001
From: Ben Hutchings <[email protected]>
Date: Wed, 5 Sep 2012 14:37:37 -0700
Subject: tools/hv: Check for read/write errors
From: Ben Hutchings <[email protected]>
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 <[email protected]>
Signed-off-by: K. Y. Srinivasan <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
tools/hv/hv_kvp_daemon.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
--- 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 poo
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.
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/staging-speakup_soft-fix-reading-of-init-string.patch
queue-3.4/tools-hv-check-for-read-write-errors.patch
queue-3.4/tools-hv-fix-file-handle-leak.patch
queue-3.4/tools-hv-fix-exit-error-code.patch
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