Re: next-20230110: arm64: defconfig+kselftest config boot failed - Unable to handle kernel paging request at virtual address fffffffffffffff8

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On Wed, Jan 11, 2023 at 12:29:04PM +0000, Mark Brown wrote:

> We're seeing issues in all configs on meson-gxl-s905x-libretech-cc
> today, not just with the kselftest fragment.  The initial failuire seems
> to be:

> [   17.337253] WARNING: CPU: 3 PID: 123 at drivers/gpu/drm/drm_bridge.c:1257 drm_bridge_hpd_enable+0x8c/0x94 [drm]

> full log at:

>    https://storage.kernelci.org/next/master/next-20230111/arm64/defconfig/gcc-10/lab-broonie/baseline-meson-gxl-s905x-libretech-cc.txt

> and links to other logs at:

>   https://linux.kernelci.org/test/job/next/branch/master/kernel/next-20230111/plan/baseline/

> Today's -next does have that fix in it so it's not fixing whatever the
> original issue was, I suspect it might even be exposing other issues.
> We are however still seeing the stack filling up, even with a GCC 10
> defconfig build.

A bisect landed on 0e4dcffd331fa7d ("drm/panel: raspberrypi-touchscreen:
Convert to i2c's .probe_new()") which is obviously not credible.  I
suspect that what's happening here is that the fix you applied is making
an issue somewhere else visible in defconfig and is as a result
confusing the bisect.  Ard mentioned an issue with non-EFI biits
introduced by EFI changes here:

https://lore.kernel.org/linux-arm-kernel/CAMj1kXGFa=Zriyp_mS7bbQr0wiwikt0ObjOKUSNGpJtFvLmnkg@xxxxxxxxxxxxxx/

which seems like a plausible culprit,

bisect log:

git bisect start
# bad: [c9e9cdd8bdcc3e1ea330d49ea587ec71884dd0f5] Add linux-next specific files for 20230111
git bisect bad c9e9cdd8bdcc3e1ea330d49ea587ec71884dd0f5
# good: [7dd4b804e08041ff56c88bdd8da742d14b17ed25] Merge tag 'nfsd-6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
git bisect good 7dd4b804e08041ff56c88bdd8da742d14b17ed25
# good: [ecf8827ab7dd5731813f90146d9936165b170f32] Merge branch 'drm-next' of git://git.freedesktop.org/git/drm/drm.git
git bisect good ecf8827ab7dd5731813f90146d9936165b170f32
# bad: [64208e4940ede76709f1ff5b01d1b78efc2951cf] Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
git bisect bad 64208e4940ede76709f1ff5b01d1b78efc2951cf
# bad: [1077dd31ba60b39a231560beec24b97eadf8bd8f] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
git bisect bad 1077dd31ba60b39a231560beec24b97eadf8bd8f
# bad: [1577a2c2aad943fbc6a5e959ae83c4ef8bc3d4de] Merge branch 'drm-next' of https://gitlab.freedesktop.org/agd5f/linux
git bisect bad 1577a2c2aad943fbc6a5e959ae83c4ef8bc3d4de
# good: [ec787deb2ddffc6cd6afe0e2fbbbd490ddc383ed] drm/amd: Use `amdgpu_ucode_*` helpers for GFX9
git bisect good ec787deb2ddffc6cd6afe0e2fbbbd490ddc383ed
# bad: [0e4dcffd331fa7d2a6ae628b51a7f418dfa90367] drm/panel: raspberrypi-touchscreen: Convert to i2c's .probe_new()
git bisect bad 0e4dcffd331fa7d2a6ae628b51a7f418dfa90367
# good: [c702545e19ebb6113d607f2a30ba2ee6cf881a3a] drm/gud: use new debugfs device-centered functions
git bisect good c702545e19ebb6113d607f2a30ba2ee6cf881a3a
# good: [977374cf481d3bea916b2775e6ecc682b9689550] drm/vc4: plane: Add 3:3:2 and 4:4:4:4 RGB/RGBX/RGBA formats
git bisect good 977374cf481d3bea916b2775e6ecc682b9689550
# good: [67d0a30128c9f644595dfe67ac0fb941a716a6c9] drm/meson: dw-hdmi: Fix devm_regulator_*get_enable*() conversion
git bisect good 67d0a30128c9f644595dfe67ac0fb941a716a6c9
# good: [29ef7605e2fd44038a70df0f46b7821464081b22] drm/i2c/sil164: Convert to i2c's .probe_new()
git bisect good 29ef7605e2fd44038a70df0f46b7821464081b22
# good: [307259952625798fbea89b04aebbc5106ff18c68] drm/i2c/tda998x: Convert to i2c's .probe_new()
git bisect good 307259952625798fbea89b04aebbc5106ff18c68
# good: [446757576a646eba6fae085396bdfbd74245ff28] drm/panel: olimex-lcd-olinuxino: Convert to i2c's .probe_new()
git bisect good 446757576a646eba6fae085396bdfbd74245ff28
# first bad commit: [0e4dcffd331fa7d2a6ae628b51a7f418dfa90367] drm/panel: raspberrypi-touchscreen: Convert to i2c's .probe_new()

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