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From b93c4cae1aebda786a478677d6364308e4579ade Mon Sep 17 00:00:00 2001
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From: Victor Toso <victortoso@redhat.com>
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Date: Sat, 25 Jun 2022 00:29:12 +0200
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Subject: [PATCH 2/2] usbredirparser: reset parser's fields on unserialize
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Content-type: text/plain
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This is a followup from previous commit and fixes the following leak.
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| 104 (24 direct, 80 indirect) bytes in 1 blocks are definitely lost in loss record 15 of 19
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| at 0x484A464: calloc (vg_replace_malloc.c:1328)
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| by 0x485A238: usbredirparser_queue (usbredirparser.c:1235)
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| by 0x485A571: usbredirparser_init (usbredirparser.c:227)
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| by 0x40130B: get_usbredirparser (serializer.c:77)
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| by 0x401379: simple (serializer.c:95)
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| by 0x48FA3DD: ??? (in /usr/lib64/libglib-2.0.so.0.7200.2)
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| by 0x48FA144: ??? (in /usr/lib64/libglib-2.0.so.0.7200.2)
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| by 0x48FA8E1: g_test_run_suite (in /usr/lib64/libglib-2.0.so.0.7200.2)
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| by 0x48FA94C: g_test_run (in /usr/lib64/libglib-2.0.so.0.7200.2)
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| by 0x401161: main (serializer.c:112)
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| LEAK SUMMARY:
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| definitely lost: 24 bytes in 1 blocks
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| indirectly lost: 80 bytes in 1 blocks
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| possibly lost: 0 bytes in 0 blocks
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| still reachable: 25,500 bytes in 17 blocks
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| suppressed: 0 bytes in 0 blocks
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| Reachable blocks (those to which a pointer was found) are not shown.
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| To see them, rerun with: --leak-check=full --show-leak-kinds=all
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Signed-off-by: Victor Toso <victortoso@redhat.com>
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---
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usbredirparser/usbredirparser.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/usbredirparser/usbredirparser.c b/usbredirparser/usbredirparser.c
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index a5dd0e7..9bfc27c 100644
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--- a/usbredirparser/usbredirparser.c
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+++ b/usbredirparser/usbredirparser.c
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@@ -1823,6 +1823,21 @@ int usbredirparser_unserialize(struct usbredirparser *parser_pub,
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return -1;
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}
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+ {
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+ /* We need to reset parser's state to receive unserialized
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+ * data. */
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+ struct usbredirparser_buf *wbuf = parser->write_buf;
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+ while (wbuf) {
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+ struct usbredirparser_buf *next_wbuf = wbuf->next;
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+ free(wbuf->buf);
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+ free(wbuf);
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+ wbuf = next_wbuf;
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+ }
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+ parser->write_buf = NULL;
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+ parser->write_buf_count = 0;
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+ parser->write_buf_total_size = 0;
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+ }
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+
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if (unserialize_int(parser, &state, &remain, &i, "length")) {
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usbredirparser_assert_invariants(parser);
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return -1;
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--
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2.37.1
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