diff options
| author | Jude Shih <shenshih@amd.com> | 2021-10-18 07:04:23 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-28 21:26:51 +0300 |
| commit | 094b21c1a3578234f06a28b80f4d2f6446b5f533 (patch) | |
| tree | 50e808e0959fa3f110f31a836f92a53eb566e1f2 /drivers/gpu | |
| parent | f638d7505f99bca9436aac37b2a1ecb3f84803a5 (diff) | |
| download | linux-094b21c1a3578234f06a28b80f4d2f6446b5f533.tar.xz | |
drm/amd/display: Fix USB4 hot plug crash issue
[Why]
Notify data from outbox corrupt, the notify type should be 2 (HPD) instead of 0
(No data). We copied the address instead of the value. The memory might be
freed in the end of outbox IRQ
[How]
We should allocate the memory of notify and copy the whole content from outbox to
hpd handle function
Fixes: 88f52b1fff891e ("drm/amd/display: Support for SET_CONFIG processing with DMUB")
Signed-off-by: Jude Shih <shenshih@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 23 |
1 files changed, 16 insertions, 7 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 4b6c021c02f4..6f980938fae9 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -730,6 +730,8 @@ static void dm_handle_hpd_work(struct work_struct *work) dmub_hpd_wrk->adev->dm.dmub_callback[dmub_hpd_wrk->dmub_notify->type](dmub_hpd_wrk->adev, dmub_hpd_wrk->dmub_notify); } + + kfree(dmub_hpd_wrk->dmub_notify); kfree(dmub_hpd_wrk); } @@ -755,12 +757,6 @@ static void dm_dmub_outbox1_low_irq(void *interrupt_params) if (dc_enable_dmub_notifications(adev->dm.dc) && irq_params->irq_src == DC_IRQ_SOURCE_DMCUB_OUTBOX) { - dmub_hpd_wrk = kzalloc(sizeof(*dmub_hpd_wrk), GFP_ATOMIC); - if (!dmub_hpd_wrk) { - DRM_ERROR("Failed to allocate dmub_hpd_wrk"); - return; - } - INIT_WORK(&dmub_hpd_wrk->handle_hpd_work, dm_handle_hpd_work); do { dc_stat_get_dmub_notification(adev->dm.dc, ¬ify); @@ -769,7 +765,20 @@ static void dm_dmub_outbox1_low_irq(void *interrupt_params) continue; } if (dm->dmub_thread_offload[notify.type] == true) { - dmub_hpd_wrk->dmub_notify = ¬ify; + dmub_hpd_wrk = kzalloc(sizeof(*dmub_hpd_wrk), GFP_ATOMIC); + if (!dmub_hpd_wrk) { + DRM_ERROR("Failed to allocate dmub_hpd_wrk"); + return; + } + dmub_hpd_wrk->dmub_notify = kzalloc(sizeof(struct dmub_notification), GFP_ATOMIC); + if (!dmub_hpd_wrk->dmub_notify) { + kfree(dmub_hpd_wrk); + DRM_ERROR("Failed to allocate dmub_hpd_wrk->dmub_notify"); + return; + } + INIT_WORK(&dmub_hpd_wrk->handle_hpd_work, dm_handle_hpd_work); + if (dmub_hpd_wrk->dmub_notify) + memcpy(dmub_hpd_wrk->dmub_notify, ¬ify, sizeof(struct dmub_notification)); dmub_hpd_wrk->adev = adev; if (notify.type == DMUB_NOTIFICATION_HPD) { plink = adev->dm.dc->links[notify.link_index]; |