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[lwip-devel] [bug #57377] Assertion "pbuf_free: p->ref > 0" failed
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From: |
Hiromasa Ito |
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Subject: |
[lwip-devel] [bug #57377] Assertion "pbuf_free: p->ref > 0" failed |
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Date: |
Sun, 21 Jun 2020 09:25:51 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36 |
Follow-up Comment #5, bug #57377 (project lwip):
> Did I miss something or did some other fuzz setting change?
As far as I know, my test driver is merged, refactored, and improved by Simon
(@goldsimon). As a result of the process of them, some crashes I reported seem
to become unreproducible.
As Erik (@yarrick) written, LWIP_RAND_FOR_FUZZ seems to make them
unreproducible. Local ports of TCP/UDP clients depend on LWIP_RAND(), and in
the crashed test cases these numbers are hard-coded (TCP: 58311, UDP: 50536).
As LWIP_RAND_FOR_FUZZ allows to override LWIP_RAND(), I think this may be why
the crashes have become unreproducible.
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