Author: markj
Date: Wed Feb 5 16:09:02 2020
New Revision: 357573
URL: https://svnweb.freebsd.org/changeset/base/357573
Log:
Fix map locking in the CLEAR_PKRU sysarch(2) handler.
Reported and tested by: pho
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/amd64/amd64/sys_machdep.c
Modified: head/sys/amd64/amd64/sys_machdep.c
==============================================================================
--- head/sys/amd64/amd64/sys_machdep.c Wed Feb 5 14:00:27 2020
(r357572)
+++ head/sys/amd64/amd64/sys_machdep.c Wed Feb 5 16:09:02 2020
(r357573)
@@ -380,7 +380,7 @@ sysarch(struct thread *td, struct sysarch_args *uap)
error = pmap_pkru_clear(PCPU_GET(curpmap),
(vm_offset_t)a64pkru.addr,
(vm_offset_t)a64pkru.addr + a64pkru.len);
- vm_map_unlock(map);
+ vm_map_unlock_read(map);
break;
default:
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