Hi,
在 2023/05/27 18:18, linan666@xxxxxxxxxxxxxxx 写道:
From: Li Nan <linan122@xxxxxxxxxx>
The type of timeout is unsigned long, but it is compared with 'LONG_MAX'
in timeout_store(), which lead to value within (LONG_MAX, ULONG_MAX.]/HZ
can't be set. Fix it by checking input value with ULONG_MAX.
nak, because MAX_SCHEDULE_TIMEOUT is LONG_MAX, and LONG_MAX should be
enough for real use case.
Thanks,
Kuai
Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
---
drivers/md/md-bitmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index bc8d7565171d..5fd9cba65be8 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -2460,7 +2460,7 @@ timeout_store(struct mddev *mddev, const char *buf, size_t len)
return rv;
/* just to make sure we don't overflow... */
- if (timeout >= LONG_MAX / HZ)
+ if (timeout >= ULONG_MAX / HZ)
return -EINVAL;
timeout = timeout * HZ / 10000;
