misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_c…

…tx_get_chkpt_doorbells() 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: [email protected] Tested-by: [email protected] Signed-off-by: Anant Thazhemadam <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
zandrey · Dec 9, 2020 · 31dcb6c · 31dcb6c
1 parent 997754f
commit 31dcb6c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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;