Reported by smatch: amdgpu_atombios_i2c_process_i2c_ch() error: we previously assumed 'buf' could be null
Signed-off-by: Ernst Sjöstrand <[email protected]> --- drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c index b374653bd6cf..f9b2ce9a98f3 100644 --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c @@ -65,8 +65,15 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan, args.ucRegIndex = buf[0]; if (num) num--; - if (num) - memcpy(&out, &buf[1], num); + if (num) { + if (buf) { + memcpy(&out, &buf[1], num); + } else { + DRM_ERROR("hw i2c: missing buf with num > 1\n"); + r = -EINVAL; + goto done; + } + } args.lpI2CDataOut = cpu_to_le16(out); } else { if (num > ATOM_MAX_HW_I2C_READ) { -- 2.14.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
