xenbus: don't BUG() on user mode induced condition

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commit 0beef634b8 upstream.

Inability to locate a user mode specified transaction ID should not
lead to a kernel crash. For other than XS_TRANSACTION_START also
don't issue anything to xenbus if the specified ID doesn't match that
of any active transaction.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: Ed Swierk <eswierk@skyportsystems.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Jan Beulich 2016-07-07 01:23:57 -06:00 • committed by Ben Hutchings

parent f11001c32a

commit 266186df1d

1 changed files with 8 additions and 6 deletions

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drivers/xen/xenbus/xenbus_dev_frontend.c

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