| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.4 18/60] iscsi-target: fix extract_param to handle buffer length corner case | Date | Mon, 2 Dec 2013 11:05:59 -0800 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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From: Eric Seppanen <eric@purestorage.com>
commit 369653e4fb511928511b0ce81f41c812ff1f28b6 upstream.
extract_param() is called with max_length set to the total size of the output buffer. It's not safe to allow a parameter length equal to the buffer size as the terminating null would be written one byte past the end of the output buffer.
Signed-off-by: Eric Seppanen <eric@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/target/iscsi/iscsi_target_nego.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/target/iscsi/iscsi_target_nego.c +++ b/drivers/target/iscsi/iscsi_target_nego.c @@ -89,7 +89,7 @@ int extract_param( if (len < 0) return -1; - if (len > max_length) { + if (len >= max_length) { pr_err("Length of input: %d exceeds max_length:" " %d\n", len, max_length); return -1;
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