[PATCH AUTOSEL 6.6 08/83] drm/amd/display: Add NULL pointer and OVERRUN check within amdgpu_dm irq register

From: Hersen Wu hersenxs.wu@amd.com

[ Upstream commit 6e41709eb1d9207d88e46026baf9cc850206b374 ]

[WHY] Coverity reports OVERRUN issues within amdgpu_dm interrupt registers. Do not check index value before access array. Do not check NULL pointer.

[HOW] Add index value check for array. Add check for pointer from amdgpu_dm_irq_register_interrupt.

Reviewed-by: Harry Wentland harry.wentland@amd.com Acked-by: Tom Chung chiahsuan.chung@amd.com Signed-off-by: Hersen Wu hersenxs.wu@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 169 +++++++++++++----- 1 file changed, 128 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 60db3800666ec..7fa95a81b69bd 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3468,7 +3468,7 @@ static void handle_hpd_rx_irq(void *param) mutex_unlock(&aconnector->hpd_lock); }

-static void register_hpd_handlers(struct amdgpu_device *adev) +static int register_hpd_handlers(struct amdgpu_device *adev) { struct drm_device *dev = adev_to_drm(adev); struct drm_connector *connector; @@ -3480,11 +3480,17 @@ static void register_hpd_handlers(struct amdgpu_device *adev) int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT;

if (dc_is_dmub_outbox_supported(adev->dm.dc)) { - if (!register_dmub_notify_callback(adev, DMUB_NOTIFICATION_HPD, dmub_hpd_callback, true)) + if (!register_dmub_notify_callback(adev, DMUB_NOTIFICATION_HPD, + dmub_hpd_callback, true)) { DRM_ERROR("amdgpu: fail to register dmub hpd callback"); + return -EINVAL; + }

- if (!register_dmub_notify_callback(adev, DMUB_NOTIFICATION_HPD_IRQ, dmub_hpd_callback, true)) + if (!register_dmub_notify_callback(adev, DMUB_NOTIFICATION_HPD_IRQ, + dmub_hpd_callback, true)) { DRM_ERROR("amdgpu: fail to register dmub hpd callback"); + return -EINVAL; + } }

list_for_each_entry(connector, @@ -3497,9 +3503,16 @@ static void register_hpd_handlers(struct amdgpu_device *adev) int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT; int_params.irq_source = dc_link->irq_source_hpd;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - handle_hpd_irq, - (void *) aconnector); + if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_HPD1 || + int_params.irq_source > DC_IRQ_SOURCE_HPD6) { + DRM_ERROR("Failed to register hpd irq!\n"); + return -EINVAL; + } + + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + handle_hpd_irq, (void *) aconnector)) + return -ENOMEM; }

if (dc_link->irq_source_hpd_rx != DC_IRQ_SOURCE_INVALID) { @@ -3508,11 +3521,19 @@ static void register_hpd_handlers(struct amdgpu_device *adev) int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT; int_params.irq_source = dc_link->irq_source_hpd_rx;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - handle_hpd_rx_irq, - (void *) aconnector); + if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_HPD1RX || + int_params.irq_source > DC_IRQ_SOURCE_HPD6RX) { + DRM_ERROR("Failed to register hpd rx irq!\n"); + return -EINVAL; + } + + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + handle_hpd_rx_irq, (void *) aconnector)) + return -ENOMEM; } } + return 0; }

#if defined(CONFIG_DRM_AMD_DC_SI) @@ -3553,13 +3574,21 @@ static int dce60_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i + 1, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_VBLANK1 || + int_params.irq_source > DC_IRQ_SOURCE_VBLANK6) { + DRM_ERROR("Failed to register vblank irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_crtc_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_crtc_high_irq, c_irq_params)) + return -ENOMEM; }

/* Use GRPH_PFLIP interrupt */ @@ -3575,14 +3604,21 @@ static int dce60_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_PFLIP_FIRST || + int_params.irq_source > DC_IRQ_SOURCE_PFLIP_LAST) { + DRM_ERROR("Failed to register pflip irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.pflip_params[int_params.irq_source - DC_IRQ_SOURCE_PFLIP_FIRST];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_pflip_high_irq, c_irq_params); - + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_pflip_high_irq, c_irq_params)) + return -ENOMEM; }

/* HPD */ @@ -3593,9 +3629,9 @@ static int dce60_register_irq_handlers(struct amdgpu_device *adev) return r; }

- register_hpd_handlers(adev); + r = register_hpd_handlers(adev);

- return 0; + return r; } #endif

@@ -3639,13 +3675,21 @@ static int dce110_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_VBLANK1 || + int_params.irq_source > DC_IRQ_SOURCE_VBLANK6) { + DRM_ERROR("Failed to register vblank irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_crtc_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_crtc_high_irq, c_irq_params)) + return -ENOMEM; }

/* Use VUPDATE interrupt */ @@ -3660,13 +3704,21 @@ static int dce110_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_VUPDATE1 || + int_params.irq_source > DC_IRQ_SOURCE_VUPDATE6) { + DRM_ERROR("Failed to register vupdate irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.vupdate_params[int_params.irq_source - DC_IRQ_SOURCE_VUPDATE1];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_vupdate_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_vupdate_high_irq, c_irq_params)) + return -ENOMEM; }

/* Use GRPH_PFLIP interrupt */ @@ -3682,14 +3734,21 @@ static int dce110_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_PFLIP_FIRST || + int_params.irq_source > DC_IRQ_SOURCE_PFLIP_LAST) { + DRM_ERROR("Failed to register pflip irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.pflip_params[int_params.irq_source - DC_IRQ_SOURCE_PFLIP_FIRST];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_pflip_high_irq, c_irq_params); - + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_pflip_high_irq, c_irq_params)) + return -ENOMEM; }

/* HPD */ @@ -3700,9 +3759,9 @@ static int dce110_register_irq_handlers(struct amdgpu_device *adev) return r; }

- register_hpd_handlers(adev); + r = register_hpd_handlers(adev);

- return 0; + return r; }

/* Register IRQ sources and initialize IRQ callbacks */ @@ -3754,13 +3813,21 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_VBLANK1 || + int_params.irq_source > DC_IRQ_SOURCE_VBLANK6) { + DRM_ERROR("Failed to register vblank irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt( - adev, &int_params, dm_crtc_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_crtc_high_irq, c_irq_params)) + return -ENOMEM; }

/* Use otg vertical line interrupt */ @@ -3778,9 +3845,11 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, vrtl_int_srcid[i], 0);

- if (int_params.irq_source == DC_IRQ_SOURCE_INVALID) { - DRM_ERROR("Failed to register vline0 irq %d!\n", vrtl_int_srcid[i]); - break; + if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_DC1_VLINE0 || + int_params.irq_source > DC_IRQ_SOURCE_DC6_VLINE0) { + DRM_ERROR("Failed to register vline0 irq!\n"); + return -EINVAL; }

c_irq_params = &adev->dm.vline0_params[int_params.irq_source @@ -3789,8 +3858,10 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_dcn_vertical_interrupt0_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_dcn_vertical_interrupt0_high_irq, + c_irq_params)) + return -ENOMEM; } #endif

@@ -3813,13 +3884,21 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_VUPDATE1 || + int_params.irq_source > DC_IRQ_SOURCE_VUPDATE6) { + DRM_ERROR("Failed to register vupdate irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.vupdate_params[int_params.irq_source - DC_IRQ_SOURCE_VUPDATE1];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_vupdate_high_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_vupdate_high_irq, c_irq_params)) + return -ENOMEM; }

/* Use GRPH_PFLIP interrupt */ @@ -3836,14 +3915,21 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) int_params.irq_source = dc_interrupt_to_irq_source(dc, i, 0);

+ if (int_params.irq_source == DC_IRQ_SOURCE_INVALID || + int_params.irq_source < DC_IRQ_SOURCE_PFLIP_FIRST || + int_params.irq_source > DC_IRQ_SOURCE_PFLIP_LAST) { + DRM_ERROR("Failed to register pflip irq!\n"); + return -EINVAL; + } + c_irq_params = &adev->dm.pflip_params[int_params.irq_source - DC_IRQ_SOURCE_PFLIP_FIRST];

c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_pflip_high_irq, c_irq_params); - + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_pflip_high_irq, c_irq_params)) + return -ENOMEM; }

/* HPD */ @@ -3854,9 +3940,9 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) return r; }

- register_hpd_handlers(adev); + r = register_hpd_handlers(adev);

- return 0; + return r; } /* Register Outbox IRQ sources and initialize IRQ callbacks */ static int register_outbox_irq_handlers(struct amdgpu_device *adev) @@ -3887,8 +3973,9 @@ static int register_outbox_irq_handlers(struct amdgpu_device *adev) c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source;

- amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_dmub_outbox1_low_irq, c_irq_params); + if (!amdgpu_dm_irq_register_interrupt(adev, &int_params, + dm_dmub_outbox1_low_irq, c_irq_params)) + return -ENOMEM; }

return 0;