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Code Issues Releases Wiki Activity

VMCI: Fix possible memcpy() run-time warning in vmci_datagram_invoke_guest_handler() 

commit e606e4b717 upstream.

The changes are similar to those given in the commit 19b070fefd
("VMCI: Fix memcpy() run-time warning in dg_dispatch_as_host()").

Fix filling of the msg and msg_payload in dg_info struct, which prevents a
possible "detected field-spanning write" of memcpy warning that is issued
by the tracking mechanism __fortify_memcpy_chk.

Signed-off-by: Vasiliy Kovalev <kovalev@altlinux.org>
Link: https://lore.kernel.org/r/20240219105315.76955-1-kovalev@altlinux.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vasiliy Kovalev 2024-02-19 13:53:15 +03:00 committed by Greg Kroah-Hartman
parent d006b709db
commit 7f12ecf453
1 changed files with 2 additions and 1 deletions
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3
drivers/misc/vmw_vmci/vmci_datagram.c
View File

@ -378,7 +378,8 @@ int vmci_datagram_invoke_guest_handler(struct vmci_datagram *dg)
dg_info->in_dg_host_queue = false;
dg_info->entry = dst_entry;
memcpy(&dg_info->msg, dg, VMCI_DG_SIZE(dg));
dg_info->msg = *dg;
memcpy(&dg_info->msg_payload, dg + 1, dg->payload_size);
INIT_WORK(&dg_info->work, dg_delayed_dispatch);
schedule_work(&dg_info->work);