Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot

From	mc36 <csmate@nop.hu>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot
Date	2026-01-26 11:30 +0100
Message-ID	<Mhs14-drk3-1@gated-at.bofh.it> (permalink)
References	(1 earlier) <Mhhfj-dk8O-1@gated-at.bofh.it> <MhhoZ-dktg-7@gated-at.bofh.it> <Mhoqt-doZ5-1@gated-at.bofh.it> <Mh8F3-dewa-9@gated-at.bofh.it> <Mhoqt-doZ5-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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hi,

On 1/26/26 07:31, Uwe Kleine-K  nig wrote:

>> i rarely turn that box on, the one before 6.18 was 6.17.9 and that
>> worked....
> 
> I intend to look into the detail here later this week, but if you come
> around to test the earlier 6.18.y kernels and report back which is the
> first broken one that would help me to know where to look for the
> regression.
> 

i'll try my best to bisect this at debian kernel version level, but 
don't have high hopes to do so at commit level; the device i have 
(asterfusion x312p with 2 dpu-s, and those latter are the aarch64s) 
revolves around the intel tofino asic and the two arm64 socs are just 
sidecars, moreover its a development box, and as such, to power cycle 
them needs about 10 minutes manual process from my side bring up all the 
stuff to have the arm64s some networking again... it also adds to the 
mix that the 6.17 had about 50% chance of not booting up and getting to 
the (initramfs) because the kernel failed to bring up the emmc.... and 
if it even booted up, had tons of complains about the nics, which, 
later, i use with dpdk, thats the reason i did not bugged about this 
before....

tldr; i'll get back to you with the latest known working kernel version 
if i find some spare hours, or n/a if i've given up in the middle of the 
process...:)

all the best,

csaba

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Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2026-01-26 00:00 +0100
  Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot mc36 <csmate@nop.hu> - 2026-01-26 00:10 +0100
    Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2026-01-26 07:40 +0100
      Bug#1126410: linux-image-6.18.5+deb14-arm64: null pointer dereference on arm64 during boot mc36 <csmate@nop.hu> - 2026-01-26 11:30 +0100

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