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

From	Uwe Kleine-König <u.kleine-koenig@baylibre.com>
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 00:00 +0100
Message-ID	<Mhhfj-dk8O-1@gated-at.bofh.it> (permalink)
References	<Mh8F3-dewa-9@gated-at.bofh.it> <Mh8F3-dewa-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hello,

On Sun, Jan 25, 2026 at 02:31:09PM +0100, mc36 wrote:
> Package: src:linux
> Version: 6.18.5-1
> Severity: normal
> 
> Dear Maintainer,
> 
> *** Reporter, please consider answering these questions, where appropriate ***
> 
>    * What led up to the situation?
> upgrade to linux-image-arm64 which is 6.18.5 at the time of writing

Did you update from 6.18.3-1? Or something earlier?

>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
> sudo apt-get update ; sudo apt-get dist-upgrade ; sudo reboot
> 
>    * What was the outcome of this action?
> console hang, see log below
> 
>    * What outcome did you expect instead?
> boot up as usual, like on 6.17....
> [    4.557694] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080
> [    4.557699] Mem abort info:
> [    4.557701]   ESR = 0x0000000096000004
> [    4.557704]   EC = 0x25: DABT (current EL), IL = 32 bits
> [    4.557707]   SET = 0, FnV = 0
> [    4.557710]   EA = 0, S1PTW = 0
> [    4.557713]   FSC = 0x04: level 0 translation fault
> [    4.557716] Data abort info:
> [    4.557718]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
> [    4.557721]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> [    4.557725]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> [    4.557728] [0000000000000080] user address but active_mm is swapper
> [    4.557732] Internal error: Oops: 0000000096000004 [#1]  SMP
> [    4.559914] Modules linked in:
> [    6.257097] CPU: 2 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.5+deb14-arm64 #1 PREEMPTLAZY  Debian 6.18.5-1
> [    6.267271] Hardware name: Marvell OcteonTX CN96XX board (DT)
> [    6.273013] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [    6.279972] pc : of_pci_add_properties+0x2a8/0x5c0
> [    6.284765] lr : of_pci_add_properties+0x28c/0x5c0
> [    6.289554] sp : ffff800082b0b9e0
> [    6.292864] x29: ffff800082b0ba50 x28: 0000000000000000 x27: 0000000000000007
> [    6.300004] x26: ffff0001070ca000 x25: ffff800081a629d0 x24: 0000000000000000
> [    6.307144] x23: 0000000000000000 x22: ffff000bf1b50990 x21: ffff0001087eb448
> [    6.314284] x20: ffff000102ba7100 x19: ffff0001087e9680 x18: 00000000fffffffc
> [    6.321423] x17: 00000000dcdffe27 x16: 00000000988f8d04 x15: 0000000000000010
> [    6.328562] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000020
> [    6.335701] x11: 00000000ffffffff x10: ffff0001087eb44e x9 : ffff800080dfeab4
> [    6.342841] x8 : ffff0001087eda80 x7 : 0000000000000000 x6 : 0000000000000000
> [    6.349980] x5 : 00000000ffffffff x4 : 0000000000000002 x3 : ffff800082b0ba30
> [    6.357119] x2 : ffff800081969fc8 x1 : ffff000100c99400 x0 : 0000000000000000
> [    6.364258] Call trace:
> [    6.366699]  of_pci_add_properties+0x2a8/0x5c0 (P)
> [    6.371490]  of_pci_make_dev_node+0xd8/0x168
> [    6.375759]  pci_bus_add_device+0x130/0x180
> [    6.379941]  pci_bus_add_devices+0x48/0xa0
> [    6.384035]  pci_host_probe+0x94/0x100
> [    6.387781]  pci_host_common_init+0x88/0xb0
> [    6.391962]  pci_host_common_probe+0x34/0x60
> [    6.396230]  platform_probe+0x64/0xc0
> [    6.399892]  really_probe+0xc8/0x3a0
> [    6.403465]  __driver_probe_device+0x84/0x160
> [    6.407820]  driver_probe_device+0x48/0x130
> [    6.412000]  __driver_attach+0xd0/0x1f8
> [    6.415834]  bus_for_each_dev+0x84/0x100
> [    6.419755]  driver_attach+0x2c/0x40
> [    6.423327]  bus_add_driver+0x118/0x240
> [    6.427160]  driver_register+0x70/0x138
> [    6.430994]  __platform_driver_register+0x28/0x40
> [    6.435696]  gen_pci_driver_init+0x24/0x38
> [    6.439791]  do_one_initcall+0x5c/0x2e0
> [    6.443626]  kernel_init_freeable+0x2c0/0x340
> [    6.447980]  kernel_init+0x28/0x160
> [    6.451467]  ret_from_fork+0x10/0x20
> [    6.455043] Code: 910143e3 d2800044 f0007cc2 913f2042 (f9404001)
> [    6.461133] ---[ end trace 0000000000000000 ]---
> [    6.465828] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> [    6.473483] SMP: stopping secondary CPUs
> [    6.477411] Kernel Offset: disabled
> [    6.480894] CPU features: 0x000080,00026800,48046201,04017203
> [    6.486636] Memory Limit: none
> [    6.489687] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---

I didn't look into the details yet, but Salvatore found this to be
similar to
https://lore.kernel.org/all/wnrtofgggs5d7y42ps4ujp3h54nuiszfkmoor6hdz2vlpbvkys@d4nre55j6nam/#t.

Does this problem happen for you on each boot?

Best regards
Uwe

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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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