4.9-stable review patch. If anyone has any objections, please let me know.
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From: Kees Cook keescook@chromium.org
[ Upstream commit 9e4eb1ce472fbf7b007f23c88ec11c37265e401c ]
Using memcpy() from a string that is shorter than the length copied means the destination buffer is being filled with arbitrary data from the kernel rodata segment. Instead, use strncpy() which will fill the trailing bytes with zeros.
This was found with the future CONFIG_FORTIFY_SOURCE feature.
Cc: Daniel Micay danielmicay@gmail.com Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/brocade/bna/bfa_ioc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/brocade/bna/bfa_ioc.c +++ b/drivers/net/ethernet/brocade/bna/bfa_ioc.c @@ -2845,7 +2845,7 @@ bfa_ioc_get_adapter_optrom_ver(struct bf static void bfa_ioc_get_adapter_manufacturer(struct bfa_ioc *ioc, char *manufacturer) { - memcpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN); + strncpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN); }
static void