Else we can get use after free on ve_struct.
https://virtuozzo.atlassian.net/browse/VSTOR-118289
Signed-off-by: Pavel Tikhomirov <[email protected]>
Feature: ve: ve generic structures
---
kernel/ve/vecalls.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/ve/vecalls.c b/kernel/ve/vecalls.c
index 6caf269fe5040..a9e82a1335403 100644
--- a/kernel/ve/vecalls.c
+++ b/kernel/ve/vecalls.c
@@ -120,6 +120,8 @@ static int vestat_seq_show(struct seq_file *m, void *v)
struct kernel_cpustat kstat;
entry = (struct list_head *)v;
+
+ guard(mutex)(&ve_list_lock);
ve = list_entry(entry, struct ve_struct, ve_list);
curve = get_exec_env();
@@ -275,6 +277,7 @@ static int veinfo_seq_show(struct seq_file *m, void *v)
{
struct ve_struct *ve;
+ guard(mutex)(&ve_list_lock);
ve = list_entry((struct list_head *)v, struct ve_struct, ve_list);
/* second 0 is deprecated ve->class_id */
--
2.51.1
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