[slam] Avoid NULL pointer dereference in slam_pull_value()
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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@ -400,12 +400,16 @@ static int slam_pull_value ( struct slam_request *slam,
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return -EINVAL;
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}
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/* Read value */
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/* Strip value */
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iob_pull ( iobuf, len );
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*value = ( *data & 0x1f );
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while ( --len ) {
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*value <<= 8;
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*value |= *(++data);
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/* Read value, if applicable */
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if ( value ) {
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*value = ( *data & 0x1f );
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while ( --len ) {
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*value <<= 8;
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*value |= *(++data);
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}
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}
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return 0;
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