Messages in this thread | | | Date | Thu, 8 Feb 2024 12:11:28 +0000 | From | Simon Horman <> | Subject | Re: [PATCH] net/sun3_82586: Avoid reading past buffer in debug output |
| |
On Tue, Feb 06, 2024 at 08:16:54AM -0800, Kees Cook wrote: > Since NUM_XMIT_BUFFS is always 1, building m68k with sun3_defconfig and > -Warraybounds, this build warning is visible[1]: > > drivers/net/ethernet/i825xx/sun3_82586.c: In function 'sun3_82586_timeout': > drivers/net/ethernet/i825xx/sun3_82586.c:990:122: warning: array subscript 1 is above array bounds of 'volatile struct transmit_cmd_struct *[1]' [-Warray-bounds=] > 990 | printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); > | ~~~~~~~~~~~~^~~ > ... > drivers/net/ethernet/i825xx/sun3_82586.c:156:46: note: while referencing 'xmit_cmds' > 156 | volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; > > Avoid accessing index 1 since it doesn't exist. > > Link: https://github.com/KSPP/linux/issues/325 [1] > Cc: Sam Creasey <sammy@sammy.net> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Eric Dumazet <edumazet@google.com> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: Paolo Abeni <pabeni@redhat.com> > Cc: Gustavo A. R. Silva <gustavoars@kernel.org> > Cc: netdev@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Simon Horman <horms@kernel.org> Tested-by: Simon Horman <horms@kernel.org> # build-tested
..
| |