[Bug 2065406] [NEW] kernel UBSAN array-index-out-of-bounds in AMD video card Edit

[Etienne Lorrain]

Public bug reported:

Ubuntu 24-04 no more start in graphic mode after latest upgrade, only
control-alt-f2 to get console.

The driver for Radeon R9 290x/390x generate:
[ 2.812012] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/radeon_atombios.c:2718:34
[ 2.812454] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/radeon_atombios.c:2716:55
[ 2.812858] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/ci_dpm.c:5588:32
[ 2.812860] index 9 is out of range for type 'UCHAR [1]'

[ 3.948792] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:680:23
[ 3.948795] index 8 is out of range for type 'atom_gpio_pin_assignment [8]'

** Affects: libdrm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ubsan

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https://bugs.launchpad.net/bugs/2065406

Title:
  kernel UBSAN array-index-out-of-bounds in AMD video card Edit

Status in libdrm package in Ubuntu:
  New

Bug description:
  Ubuntu 24-04 no more start in graphic mode after latest upgrade, only
  control-alt-f2 to get console.

  The driver for Radeon R9 290x/390x generate:
  [ 2.812012] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/radeon_atombios.c:2718:34
  [ 2.812454] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/radeon_atombios.c:2716:55
  [ 2.812858] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/radeon/ci_dpm.c:5588:32
  [ 2.812860] index 9 is out of range for type 'UCHAR [1]'

  [ 3.948792] UBSAN: array-index-out-of-bounds in /build/linux-yrLejD/linux-6.8.0/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:680:23
  [ 3.948795] index 8 is out of range for type 'atom_gpio_pin_assignment [8]'

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