[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH] exec: Add missing rcu_read_unlock
From: |
Roman Kapl |
Subject: |
[Qemu-devel] [PATCH] exec: Add missing rcu_read_unlock |
Date: |
Mon, 9 Jan 2017 12:09:21 +0100 |
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 <address@hidden>
---
exec.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/exec.c b/exec.c
index 8d4bb0e..6895db5 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;
}
}
--
2.10.1
- [Qemu-devel] [PATCH] exec: Add missing rcu_read_unlock,
Roman Kapl <=