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iscsi-target: fix extract_param to handle buffer length corner case
commit 369653e4fb 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>
This commit is contained in:
committed by
Greg Kroah-Hartman
parent
cf516effc7
commit
e97f132f0e
@@ -90,7 +90,7 @@ int extract_param(
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if (len < 0)
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return -1;
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if (len > max_length) {
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if (len >= max_length) {
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pr_err("Length of input: %d exceeds max_length:"
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" %d\n", len, max_length);
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return -1;
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