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bna: Avoid reading past end of buffer

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[ Upstream commit 9e4eb1ce47 ]

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>
This commit is contained in:
Kees Cook
2017-05-05 15:25:32 -07:00
committed by Greg Kroah-Hartman
parent a4e074608e
commit 68e356469b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/brocade/bna/bfa_ioc.c
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@ -2845,7 +2845,7 @@ bfa_ioc_get_adapter_optrom_ver(struct bfa_ioc *ioc, char *optrom_ver)
static void static void
bfa_ioc_get_adapter_manufacturer(struct bfa_ioc *ioc, char *manufacturer) 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 static void