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[Qemu-commits] [qemu/qemu] 10be62: io: remove io watch if TLS channel is


From: Richard Henderson
Subject: [Qemu-commits] [qemu/qemu] 10be62: io: remove io watch if TLS channel is closed durin...
Date: Wed, 02 Aug 2023 06:51:31 -0700

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 10be627d2b5ec2d6b3dce045144aa739eef678b4
      
https://github.com/qemu/qemu/commit/10be627d2b5ec2d6b3dce045144aa739eef678b4
  Author: Daniel P. Berrangé <berrange@redhat.com>
  Date:   2023-08-01 (Tue, 01 Aug 2023)

  Changed paths:
    M include/io/channel-tls.h
    M io/channel-tls.c

  Log Message:
  -----------
  io: remove io watch if TLS channel is closed during handshake

The TLS handshake make take some time to complete, during which time an
I/O watch might be registered with the main loop. If the owner of the
I/O channel invokes qio_channel_close() while the handshake is waiting
to continue the I/O watch must be removed. Failing to remove it will
later trigger the completion callback which the owner is not expecting
to receive. In the case of the VNC server, this results in a SEGV as
vnc_disconnect_start() tries to shutdown a client connection that is
already gone / NULL.

CVE-2023-3354
Reported-by: jiangyegen <jiangyegen@huawei.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>


  Commit: a51c07053878719501eb6cb34729c706a4c1112a
      
https://github.com/qemu/qemu/commit/a51c07053878719501eb6cb34729c706a4c1112a
  Author: Richard Henderson <richard.henderson@linaro.org>
  Date:   2023-08-01 (Tue, 01 Aug 2023)

  Changed paths:
    M include/io/channel-tls.h
    M io/channel-tls.c

  Log Message:
  -----------
  Merge tag 'io-tls-hs-crash-pull-request' of https://gitlab.com/berrange/qemu 
into staging

Fix crash during early close of TLS channel

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# gpg: Signature made Tue 01 Aug 2023 10:46:06 AM PDT
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]

* tag 'io-tls-hs-crash-pull-request' of https://gitlab.com/berrange/qemu:
  io: remove io watch if TLS channel is closed during handshake

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>


Compare: https://github.com/qemu/qemu/compare/38a6de80b917...a51c07053878



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