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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2011-11-04 19:24:36 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-11-16 18:13:48 +0100 |
| commit | 99cb2ddcc617f43917e94a4147aa3ccdb2bcd77e (patch) | |
| tree | 2c2f3a0271dc0e2b627eb45823c03a10bbce3002 /drivers/xen/gntalloc.c | |
| parent | xen-gntalloc: integer overflow in gntalloc_ioctl_alloc() (diff) | |
| download | linux-99cb2ddcc617f43917e94a4147aa3ccdb2bcd77e.tar.xz linux-99cb2ddcc617f43917e94a4147aa3ccdb2bcd77e.zip | |
xen-gntalloc: signedness bug in add_grefs()
gref->gref_id is unsigned so the error handling didn't work.
gnttab_grant_foreign_access() returns an int type, so we can add a
cast here, and it doesn't cause any problems.
gnttab_grant_foreign_access() can return a variety of errors
including -ENOSPC, -ENOSYS and -ENOMEM.
CC: stable@kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/gntalloc.c')
| -rw-r--r-- | drivers/xen/gntalloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 23c60cf4313e..e1c4c6e5b469 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -135,7 +135,7 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op, /* Grant foreign access to the page. */ gref->gref_id = gnttab_grant_foreign_access(op->domid, pfn_to_mfn(page_to_pfn(gref->page)), readonly); - if (gref->gref_id < 0) { + if ((int)gref->gref_id < 0) { rc = gref->gref_id; goto undo; } |