strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe.
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaik...@gmail.com> --- drivers/gpu/drm/amd/amdgpu/atom.c | 2 +- drivers/gpu/drm/radeon/radeon_atombios.c | 4 ++-- drivers/gpu/drm/radeon/radeon_combios.c | 4 ++-- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c index 1c5d9388ad0b..5f610e9a5f0f 100644 --- a/drivers/gpu/drm/amd/amdgpu/atom.c +++ b/drivers/gpu/drm/amd/amdgpu/atom.c @@ -1509,7 +1509,7 @@ struct atom_context *amdgpu_atom_parse(struct card_info *card, void *bios) str = CSTR(idx); if (*str != '\0') { pr_info("ATOM BIOS: %s\n", str); - strlcpy(ctx->vbios_version, str, sizeof(ctx->vbios_version)); + strscpy(ctx->vbios_version, str, sizeof(ctx->vbios_version)); } atom_rom_header = (struct _ATOM_ROM_HEADER *)CSTR(base); diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 4ad5a328d920..bf3c411a55c5 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -2105,7 +2105,7 @@ static int radeon_atombios_parse_power_table_1_3(struct radeon_device *rdev) const char *name = thermal_controller_names[power_info->info. ucOverdriveThermalController]; info.addr = power_info->info.ucOverdriveControllerAddress >> 1; - strlcpy(info.type, name, sizeof(info.type)); + strscpy(info.type, name, sizeof(info.type)); i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info); } } @@ -2355,7 +2355,7 @@ static void radeon_atombios_add_pplib_thermal_controller(struct radeon_device *r struct i2c_board_info info = { }; const char *name = pp_lib_thermal_controller_names[controller->ucType]; info.addr = controller->ucI2cAddress >> 1; - strlcpy(info.type, name, sizeof(info.type)); + strscpy(info.type, name, sizeof(info.type)); i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info); } } else { diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index 783a6b8802d5..795c3667f6d6 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -2702,7 +2702,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev) struct i2c_board_info info = { }; const char *name = thermal_controller_names[thermal_controller]; info.addr = i2c_addr >> 1; - strlcpy(info.type, name, sizeof(info.type)); + strscpy(info.type, name, sizeof(info.type)); i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info); } } @@ -2719,7 +2719,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev) struct i2c_board_info info = { }; const char *name = "f75375"; info.addr = 0x28; - strlcpy(info.type, name, sizeof(info.type)); + strscpy(info.type, name, sizeof(info.type)); i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info); DRM_INFO("Possible %s thermal controller at 0x%02x\n", name, info.addr);
