mail_index_update_header_ext(): Don't crash if size isn't 32bit aligned.

--HG--
branch : HEAD

diff --git a/src/lib-index/mail-transaction-log-append.c b/src/lib-index/mail-transaction-log-append.c
index ed4b965ba9e05a8516bba81346a0f0b1dc75595d..85c4d492a7408f575dd51ac0b1cf2ca051d05c5a 100644 (file)
--- a/src/lib-index/mail-transaction-log-append.c
+++ b/src/lib-index/mail-transaction-log-append.c
@@ -294,12 +294,14 @@ log_append_ext_hdr_update(struct log_append_context *ctx,
        buffer_t *buf;
        unsigned int hdr_size;
 
-       hdr_size = sizeof(*trans_hdr) + hdr->size;
+       hdr_size = sizeof(*trans_hdr) + hdr->size + 4;
        buf = buffer_create_static_hard(pool_datastack_create(), hdr_size);
        trans_hdr = buffer_append_space_unsafe(buf, sizeof(*trans_hdr));
        trans_hdr->offset = hdr->offset;
        trans_hdr->size = hdr->size;
        buffer_append(buf, hdr + 1, hdr->size);
+       if (buf->used % 4 != 0)
+               buffer_append_zero(buf, 4 - buf->used % 4);
        log_append_buffer(ctx, buf, NULL, MAIL_TRANSACTION_EXT_HDR_UPDATE);
 }