From 662a97d74f9b34cafe9aeb6d96620a97d768a1fa Mon Sep 17 00:00:00 2001 From: Roman Kapl Date: Mon, 9 Jan 2017 12:09:21 +0100 Subject: [PATCH] exec: Add missing rcu_read_unlock rcu_read_unlock was not called if the address_space_access_valid result is negative. This caused (at least) a problem when qemu on PPC/E500+TAP failed to terminate properly and instead got stuck in a deadlock. Signed-off-by: Roman Kapl Message-Id: <20170109110921.4931-1-rka@sysgo.com> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini (cherry picked from commit 5ad4a2b75f85dd854a781a6e03b90320cb3441d3) Signed-off-by: Michael Roth --- exec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/exec.c b/exec.c index 08c558eecf1..6fda4553fa8 100644 --- a/exec.c +++ b/exec.c @@ -2927,6 +2927,7 @@ bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_ if (!memory_access_is_direct(mr, is_write)) { l = memory_access_size(mr, l, addr); if (!memory_region_access_valid(mr, xlat, l, is_write)) { + rcu_read_unlock(); return false; } } -- 2.39.5