* [PATCH] misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells()
@ 2020-11-22 22:45 Anant Thazhemadam
0 siblings, 0 replies; only message in thread
From: Anant Thazhemadam @ 2020-11-22 22:45 UTC (permalink / raw)
To: Arnd Bergmann, Greg Kroah-Hartman, Anant Thazhemadam
Cc: linux-kernel, syzbot+a79e17c39564bedf0930
A kernel-infoleak was reported by syzbot, which was caused because
dbells was left uninitialized.
Using kzalloc() instead of kmalloc() fixes this issue.
Reported-by: syzbot+a79e17c39564bedf0930@syzkaller.appspotmail.com
Tested-by: syzbot+a79e17c39564bedf0930@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
---
drivers/misc/vmw_vmci/vmci_context.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/vmw_vmci/vmci_context.c b/drivers/misc/vmw_vmci/vmci_context.c
index 16695366ec92..26ff49fdf0f7 100644
--- a/drivers/misc/vmw_vmci/vmci_context.c
+++ b/drivers/misc/vmw_vmci/vmci_context.c
@@ -743,7 +743,7 @@ static int vmci_ctx_get_chkpt_doorbells(struct vmci_ctx *context,
return VMCI_ERROR_MORE_DATA;
}
- dbells = kmalloc(data_size, GFP_ATOMIC);
+ dbells = kzalloc(data_size, GFP_ATOMIC);
if (!dbells)
return VMCI_ERROR_NO_MEM;
--
2.25.1
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