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misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells() 

commit 31dcb6c30a 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 <anant.thazhemadam@gmail.com>
Link: https://lore.kernel.org/r/20201122224534.333471-1-anant.thazhemadam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Anant Thazhemadam 2020-11-23 04:15:34 +05:30 committed by Greg Kroah-Hartman
parent 01be033cc1
commit 750627d36f
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/vmw_vmci/vmci_context.c
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@ -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;