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Commit 074b61ff authored by Anant Thazhemadam's avatar Anant Thazhemadam Committed by Greg Kroah-Hartman
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misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells() 



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: default avatar <syzbot+a79e17c39564bedf0930@syzkaller.appspotmail.com>
Tested-by: default avatar <syzbot+a79e17c39564bedf0930@syzkaller.appspotmail.com>
Signed-off-by: default avatarAnant Thazhemadam <anant.thazhemadam@gmail.com>
Link: https://lore.kernel.org/r/20201122224534.333471-1-anant.thazhemadam@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b8590c82

drivers/misc/vmw_vmci/vmci_context.c

+1 −1
Original line number Diff line number Diff line
@@ -751,7 +751,7 @@ 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;