[Bug 206987] [drm] [amdgpu] Whole system crashes when the driver is in mode_support_and_system_configuration

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=206987

Petteri Aimonen (jpa at kernelbug.mail.kapsi.fi) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jpa at kernelbug.mail.kapsi.fi

--- Comment #16 from Petteri Aimonen (jpa at kernelbug.mail.kapsi.fi) ---
I hit the same issue, using Ubuntu 20.04. It happened when switching window to
Firefox. For me it only crashed Xorg, ssh to the machine still worked ok.
Killing Xorg didn't work and `shutdown -r now` hung up somewhere.

Here is a bug report on the Ubuntu package:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1881134

Here is call trace decoded with the debug symbols:

--

[455834.385061] Call Trace:
[455834.385120] mode_support_and_system_configuration
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calc_auto.c:176)
amdgpu
[455834.385174] ? calculate_inits_and_adj_vp
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:950
(discriminator 12)) amdgpu
[455834.385230] dcn_validate_bandwidth
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1034)
amdgpu
[455834.385283] dc_validate_global_state
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:2093)
amdgpu
[455834.385338] amdgpu_dm_atomic_check
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:7413)
amdgpu
[455834.385351] drm_atomic_check_only
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_atomic.c:1179) drm
[455834.385361] drm_atomic_commit
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_atomic.c:1220) drm
[455834.385370] drm_mode_obj_set_property_ioctl
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_mode_object.c:496
/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_mode_object.c:533) drm
[455834.385379] ? drm_mode_obj_find_prop_id
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_mode_object.c:512) drm
[455834.385386] drm_ioctl_kernel
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_ioctl.c:793) drm
[455834.385394] drm_ioctl
(/build/linux-FFoizL/linux-5.4.0/include/linux/thread_info.h:119
/build/linux-FFoizL/linux-5.4.0/include/linux/thread_info.h:152
/build/linux-FFoizL/linux-5.4.0/include/linux/uaccess.h:151
/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_ioctl.c:888) drm
[455834.385402] ? drm_mode_obj_find_prop_id
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/drm_mode_object.c:512) drm
[455834.385406] ? recalc_sigpending
(/build/linux-FFoizL/linux-5.4.0/kernel/signal.c:184) 
[455834.385440] amdgpu_drm_ioctl
(/build/linux-FFoizL/linux-5.4.0/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:1293)
amdgpu
[455834.385443] do_vfs_ioctl (/build/linux-FFoizL/linux-5.4.0/fs/ioctl.c:47
/build/linux-FFoizL/linux-5.4.0/fs/ioctl.c:510
/build/linux-FFoizL/linux-5.4.0/fs/ioctl.c:697) 
[455834.385444] ? recalc_sigpending
(/build/linux-FFoizL/linux-5.4.0/kernel/signal.c:184) 
[455834.385446] ? _copy_from_user
(/build/linux-FFoizL/linux-5.4.0/arch/x86/include/asm/uaccess_64.h:46
/build/linux-FFoizL/linux-5.4.0/arch/x86/include/asm/uaccess_64.h:71
/build/linux-FFoizL/linux-5.4.0/lib/usercopy.c:14) 
[455834.385448] ksys_ioctl
(/build/linux-FFoizL/linux-5.4.0/include/linux/file.h:43
/build/linux-FFoizL/linux-5.4.0/fs/ioctl.c:715) 
[455834.385449] __x64_sys_ioctl
(/build/linux-FFoizL/linux-5.4.0/fs/ioctl.c:719) 
[455834.385451] do_syscall_64
(/build/linux-FFoizL/linux-5.4.0/arch/x86/entry/common.c:290) 
[455834.385455] entry_SYSCALL_64_after_hwframe
(/build/linux-FFoizL/linux-5.4.0/arch/x86/entry/entry_64.S:184) 
[455834.385456] RIP: 0033:0x7faf3181837b

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