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vmm devmem_mmap_single: Bump object reference under memsegs lock.

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Reported by:	markj
Reviewed by:	corvink, markj
Differential Revision:	https://reviews.freebsd.org/D37273
This commit is contained in:
John Baldwin 2022-11-18 10:04:58 -08:00
parent 67b69e76e8
commit 223de44c93
1 changed files with 5 additions and 7 deletions
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12
sys/amd64/vmm/vmm_dev.c
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@ -1262,15 +1262,13 @@ devmem_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t len,
KASSERT(error == 0 && !sysmem && *objp != NULL,
("%s: invalid devmem segment %d", __func__, dsc->segid));
if (seglen >= last)
vm_object_reference(*objp);
else
error = EINVAL;
vm_unlock_memsegs(dsc->sc->vm);
if (seglen >= last) {
vm_object_reference(*objp);
return (0);
} else {
return (EINVAL);
}
return (error);
}
static struct cdevsw devmemsw = {