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| author | Jan Beulich <jbeulich@suse.com> | 2021-02-15 08:55:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-23 14:00:34 +0100 |
| commit | 7910839db1ca4d0cd4789872621a023f985e50e0 (patch) | |
| tree | 857bb966bb7ee3a8d33b667e8270573d57d57bcc | |
| parent | 9ca595810e8fbc541c388abdb4d2ed9ef20a2e06 (diff) | |
| download | linux-rt-7910839db1ca4d0cd4789872621a023f985e50e0.tar.gz | |
xen-scsiback: don't "handle" error by BUG()
commit 7c77474b2d22176d2bfb592ec74e0f2cb71352c9 upstream.
In particular -ENOMEM may come back here, from set_foreign_p2m_mapping().
Don't make problems worse, the more that handling elsewhere (together
with map's status fields now indicating whether a mapping wasn't even
attempted, and hence has to be considered failed) doesn't require this
odd way of dealing with errors.
This is part of XSA-362.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/xen/xen-scsiback.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c index fd32c3459b66..6d5eaea3373b 100644 --- a/drivers/xen/xen-scsiback.c +++ b/drivers/xen/xen-scsiback.c @@ -422,12 +422,12 @@ static int scsiback_gnttab_data_map_batch(struct gnttab_map_grant_ref *map, return 0; err = gnttab_map_refs(map, NULL, pg, cnt); - BUG_ON(err); for (i = 0; i < cnt; i++) { if (unlikely(map[i].status != GNTST_okay)) { pr_err("invalid buffer -- could not remap it\n"); map[i].handle = SCSIBACK_INVALID_HANDLE; - err = -ENOMEM; + if (!err) + err = -ENOMEM; } else { get_page(pg[i]); } |