group.of.nepali.translators team mailing list archive

[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

Public bug reported:

Problem got introduced by xen-4.6 in Xenial. Older versions are
unaffected.

Testcase:
 - Start one additional domU (PV or HVM does not matter)
 - Repeatedly execute "xenstore-ls"

Eventually the xenstore-ls call locks up while xenstored crashes when it
tries to access memory in

tools/xenstore/xenstored_domain.c:255 domain_can_read(struct connection
*conn)

Debugging shows that conn->domain->interface at the time of crash
returns a completely different address than before (there should only be
one per running domain, so 2).

** Affects: xen (Ubuntu)
     Importance: Critical
     Assignee: Stefan Bader (smb)
         Status: In Progress

** Affects: xen (Ubuntu Xenial)
     Importance: Critical
     Assignee: Stefan Bader (smb)
         Status: In Progress

** Also affects: xen (Ubuntu Xenial)
   Importance: Critical
     Assignee: Stefan Bader (smb)
       Status: In Progress

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https://bugs.launchpad.net/bugs/1538049

Title:
  xenstore crashes with SIGBUS in domain_can_read()

Status in xen package in Ubuntu:
  In Progress
Status in xen source package in Xenial:
  In Progress

Bug description:
  Problem got introduced by xen-4.6 in Xenial. Older versions are
  unaffected.

  Testcase:
   - Start one additional domU (PV or HVM does not matter)
   - Repeatedly execute "xenstore-ls"

  Eventually the xenstore-ls call locks up while xenstored crashes when
  it tries to access memory in

  tools/xenstore/xenstored_domain.c:255 domain_can_read(struct
  connection *conn)

  Debugging shows that conn->domain->interface at the time of crash
  returns a completely different address than before (there should only
  be one per running domain, so 2).

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