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If VOP_IOCTL fails on the device we're trying to export, return an error

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instead of dereferencing a NULL pointer later.
Problem reported by Martti Kuparinen in private email.
This commit is contained in:
bouyer 2005-04-18 11:41:11 +00:00
parent d3e5d568cd
commit 9e2767d248
1 changed files with 6 additions and 1 deletions
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7
sys/arch/xen/xen/xbdback.c
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@ -1,4 +1,4 @@
/* $NetBSD: xbdback.c,v 1.10 2005/04/17 14:50:11 bouyer Exp $ */
/* $NetBSD: xbdback.c,v 1.11 2005/04/18 11:41:11 bouyer Exp $ */
/*
* Copyright (c) 2005 Manuel Bouyer.
@ -415,6 +415,11 @@ xbdback_ctrlif_rx(ctrl_msg_t *msg, unsigned long id)
printf("xbdback VBD grow domain %d: can't ioctl "
"device 0x%x (error %d)\n", xbdi->domid,
req->extent.device, error);
vbd->start = vbd->size = vbd->dev = 0;
vn_close(vbd->vp, FREAD, NOCRED, NULL);
vbd->vp = NULL;
req->status = BLKIF_BE_STATUS_EXTENT_NOT_FOUND;
goto end;
}
vbd->size = req->extent.sector_length * (512 / DEV_BSIZE);
if (vbd->size == 0 || vbd->size > dpart.part->p_size);