diff options
author | Roger Pau Monne <roger.pau@citrix.com> | 2013-07-31 17:00:42 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-26 17:15:30 -0700 |
commit | 9fd2380271ba372254ffee4b92745a169311d4ae (patch) | |
tree | 401f5fcd523a7593291552a2fcecf2400db46fca /arch | |
parent | 774620ba0d5c80f92d9949a54a029cf41b116c57 (diff) |
xen-gnt: prevent adding duplicate gnt callbacks
commit 5f338d9001094a56cf87bd8a280b4e7ff953bb59 upstream.
With the current implementation, the callback in the tail of the list
can be added twice, because the check done in
gnttab_request_free_callback is bogus, callback->next can be NULL if
it is the last callback in the list. If we add the same callback twice
we end up with an infinite loop, were callback == callback->next.
Replace this check with a proper one that iterates over the list to
see if the callback has already been added.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Matt Wilson <msw@amazon.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions