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authorjeff <jeff@FreeBSD.org>2013-08-09 03:24:48 +0000
committerjeff <jeff@FreeBSD.org>2013-08-09 03:24:48 +0000
commit31941e8d5db2bff6bbac59234d62b0a62f698f69 (patch)
tree1abc8c388c86ef0859c1c5df828574363486d523 /sys/ofed/include
parentfd428c40becfb29227d4db32094c1c1c4f1bbf27 (diff)
downloadFreeBSD-src-31941e8d5db2bff6bbac59234d62b0a62f698f69.zip
FreeBSD-src-31941e8d5db2bff6bbac59234d62b0a62f698f69.tar.gz
- Correctly handle various edge cases in sysfs emulation.
Sponsored by: EMC / Isilon Storage Division
Diffstat (limited to 'sys/ofed/include')
-rw-r--r--sys/ofed/include/linux/sysfs.h11
1 files changed, 7 insertions, 4 deletions
diff --git a/sys/ofed/include/linux/sysfs.h b/sys/ofed/include/linux/sysfs.h
index 4a763c8..c60a2b9 100644
--- a/sys/ofed/include/linux/sysfs.h
+++ b/sys/ofed/include/linux/sysfs.h
@@ -97,11 +97,14 @@ sysctl_handle_attr(SYSCTL_HANDLER_ARGS)
error = -len;
if (error != EIO)
goto out;
+ buf[0] = '\0';
+ } else if (len) {
+ len--;
+ if (len >= PAGE_SIZE)
+ len = PAGE_SIZE - 1;
+ /* Trim trailing newline. */
+ buf[len] = '\0';
}
-
- /* Trim trailing newline. */
- len--;
- buf[len] = '\0';
}
/* Leave one trailing byte to append a newline. */
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