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author | Roger Pau Monne <roger.pau@citrix.com> | 2013-07-31 19:00:42 +0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-08-09 18:58:11 +0400 |
commit | 5f338d9001094a56cf87bd8a280b4e7ff953bb59 (patch) | |
tree | daef4ba1e3c1ecfa3e6dc8f87a21197911f78fc2 /drivers/xen/xen-selfballoon.c | |
parent | e2683957fb268c6b29316fd9e7191e13239a30a5 (diff) | |
download | linux-5f338d9001094a56cf87bd8a280b4e7ff953bb59.tar.xz |
xen-gnt: prevent adding duplicate gnt callbacks
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>
CC: stable@vger.kernel.org
Diffstat (limited to 'drivers/xen/xen-selfballoon.c')
0 files changed, 0 insertions, 0 deletions