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[PATCH] migration/rdma: prevent from double free the same mr
From: |
Li Zhijian |
Subject: |
[PATCH] migration/rdma: prevent from double free the same mr |
Date: |
Thu, 8 Jul 2021 22:45:21 +0800 |
backtrace:
'0x00007ffff5f44ec2 in __ibv_dereg_mr_1_1 (mr=0x7fff1007d390) at
/home/lizhijian/rdma-core/libibverbs/verbs.c:478
478 void *addr = mr->addr;
(gdb) bt
#0 0x00007ffff5f44ec2 in __ibv_dereg_mr_1_1 (mr=0x7fff1007d390) at
/home/lizhijian/rdma-core/libibverbs/verbs.c:478
#1 0x0000555555891fcc in rdma_delete_block (block=<optimized out>,
rdma=0x7fff38176010) at ../migration/rdma.c:691
#2 qemu_rdma_cleanup (rdma=0x7fff38176010) at ../migration/rdma.c:2365
#3 0x00005555558925b0 in qio_channel_rdma_close_rcu (rcu=0x555556b8b6c0) at
../migration/rdma.c:3073
#4 0x0000555555d652a3 in call_rcu_thread (opaque=opaque@entry=0x0) at
../util/rcu.c:281
#5 0x0000555555d5edf9 in qemu_thread_start (args=0x7fffe88bb4d0) at
../util/qemu-thread-posix.c:541
#6 0x00007ffff54c73f9 in start_thread () at /lib64/libpthread.so.0
#7 0x00007ffff53f3b03 in clone () at /lib64/libc.so.6 '
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
---
migration/rdma.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/migration/rdma.c b/migration/rdma.c
index b6cc4bef4a8..0f22b8227c0 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -1143,6 +1143,7 @@ static int qemu_rdma_reg_whole_ram_blocks(RDMAContext
*rdma)
for (i--; i >= 0; i--) {
ibv_dereg_mr(local->block[i].mr);
+ local->block[i].mr = NULL;
rdma->total_registrations--;
}
--
2.30.2
- [PATCH] migration/rdma: prevent from double free the same mr,
Li Zhijian <=