[Bug 1880332] [NEW] Possible regression in QEMU 5.0.0 after CVE-2020-10702 (segmentation fault)

[Héctor Molinero Fernández]

Public bug reported:

I've come across a very specific situation, but I'm sure it could be
replicated in other cases.

In QEMU 5.0.0 when I use user emulation with a cURL binary for aarch64
and connect to a server using TLS 1.2 and ECDHE-ECDSA-CHACHA20-POLY1305
cypher a segmentation fault occurs.

I attach a Dockerfile that reproduces this crash and the strace output
with and without the de0b1bae6461f67243282555475f88b2384a1eb9 commit
reverted.

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "crash-replication.zip"
   
https://bugs.launchpad.net/bugs/1880332/+attachment/5375960/+files/crash-replication.zip

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https://bugs.launchpad.net/bugs/1880332

Title:
  Possible regression in QEMU 5.0.0 after CVE-2020-10702 (segmentation
  fault)

Status in QEMU:
  New

Bug description:
  I've come across a very specific situation, but I'm sure it could be
  replicated in other cases.

  In QEMU 5.0.0 when I use user emulation with a cURL binary for aarch64
  and connect to a server using TLS 1.2 and ECDHE-ECDSA-
  CHACHA20-POLY1305 cypher a segmentation fault occurs.

  I attach a Dockerfile that reproduces this crash and the strace output
  with and without the de0b1bae6461f67243282555475f88b2384a1eb9 commit
  reverted.

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