[PATCH 4.14 16/29] misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells()
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-01-07 14:38:54
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From: Anant Thazhemadam <redacted> commit 31dcb6c30a26d32650ce134820f27de3c675a45a upstream. 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 <redacted> Link: https://lore.kernel.org/r/20201122224534.333471-1-anant.thazhemadam@gmail.com (local) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/misc/vmw_vmci/vmci_context.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/misc/vmw_vmci/vmci_context.c
+++ b/drivers/misc/vmw_vmci/vmci_context.c@@ -751,7 +751,7 @@ static int vmci_ctx_get_chkpt_doorbells( return VMCI_ERROR_MORE_DATA; } - dbells = kmalloc(data_size, GFP_ATOMIC); + dbells = kzalloc(data_size, GFP_ATOMIC); if (!dbells) return VMCI_ERROR_NO_MEM;