From c0423539559547d49cb62e76574599593829dcf8 Mon Sep 17 00:00:00 2001 From: Justin Stitt Date: Thu, 5 Oct 2023 22:52:34 +0000 Subject: [PATCH] cavium/liquidio: replace deprecated strncpy with strscpy `strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces. We expect `app_name` to be NUL-terminated: dev_info(&oct->pci_dev->dev, "Running %s (%llu Hz)\n", app_name, CVM_CAST64(cs->corefreq)); ... and it seems NUL-padding is not required, let's opt for strscpy(). For `oct->boardinfo.name/serial_number` let's opt for strscpy() as well since it is expected to be NUL-terminated and does not require NUL-padding as `oct` is zero-initialized in octeon_device.c +707: | buf = vzalloc(size); | if (!buf) | return NULL; | | oct = (struct octeon_device *)buf; Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://github.com/KSPP/linux/issues/90 Signed-off-by: Justin Stitt Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20231005-strncpy-drivers-net-ethernet-cavium-liquidio-octeon_device-c-v1-1-9a207cef9438@google.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/cavium/liquidio/octeon_device.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.c b/drivers/net/ethernet/cavium/liquidio/octeon_device.c index 364f4f912dc2..6b6cb73482d7 100644 --- a/drivers/net/ethernet/cavium/liquidio/octeon_device.c +++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.c @@ -1217,10 +1217,10 @@ int octeon_core_drv_init(struct octeon_recv_info *recv_info, void *buf) goto core_drv_init_err; } - strncpy(app_name, + strscpy(app_name, get_oct_app_string( (u32)recv_pkt->rh.r_core_drv_init.app_mode), - sizeof(app_name) - 1); + sizeof(app_name)); oct->app_mode = (u32)recv_pkt->rh.r_core_drv_init.app_mode; if (recv_pkt->rh.r_core_drv_init.app_mode == CVM_DRV_NIC_APP) { oct->fw_info.max_nic_ports = @@ -1257,9 +1257,10 @@ int octeon_core_drv_init(struct octeon_recv_info *recv_info, void *buf) memcpy(cs, get_rbd( recv_pkt->buffer_ptr[0]) + OCT_DROQ_INFO_SIZE, sizeof(*cs)); - strncpy(oct->boardinfo.name, cs->boardname, OCT_BOARD_NAME); - strncpy(oct->boardinfo.serial_number, cs->board_serial_number, - OCT_SERIAL_LEN); + strscpy(oct->boardinfo.name, cs->boardname, + sizeof(oct->boardinfo.name)); + strscpy(oct->boardinfo.serial_number, cs->board_serial_number, + sizeof(oct->boardinfo.serial_number)); octeon_swap_8B_data((u64 *)cs, (sizeof(*cs) >> 3));