lkml.org 
[lkml]   [2019]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] RAS/CEC: fix __find_elem
Date
A left over pfn (because we don't clear) at ca->array[n] can be a match
in __find_elem. Later it'd cause a memmove size overflow in del_elem.

Signed-off-by: WANG Chao <chao.wang@ucloud.cn>
---
drivers/ras/cec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
index 2d9ec378a8bc..2e0bf1269c31 100644
--- a/drivers/ras/cec.c
+++ b/drivers/ras/cec.c
@@ -206,7 +206,7 @@ static int __find_elem(struct ce_array *ca, u64 pfn, unsigned int *to)

this_pfn = PFN(ca->array[min]);

- if (this_pfn == pfn)
+ if (this_pfn == pfn && ca->n > min)
return min;

return -ENOKEY;
--
2.21.0
\
 
 \ /
  Last update: 2019-04-18 05:42    [W:0.101 / U:1.560 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site