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Bug#1029336: Regression: unable to mount root fs on unknown-block

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On Sat, Jan 21, 2023 at 12:40:07PM +0000, James Addison wrote:
> Package: linux-image-6.1.0-1-rt-amd64
> Severity: critical
> Justification: breaks the whole system
> 
> Dear Maintainer,
> 
> When attempting to boot a ThinkPad X230 from kernel build 6.1.0-1-rt-amd64, the
> following error occurs (transcribed from screen; apologies in advance for any
> typos):
> 
>   [...] No filesystem could mount root, tried :
>   [...] 
>   [...] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
>   [...] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0-1-rt-amd64 #1  Debian 6.1.4-1
>   [...] Hardware name: <disk and BIOS details>
>   [...] Call Trace:
>   [...]  <TASK>
>   [...]  dump_stack_lvl+0x44/0x5c
>   [...]  panic+0x10e/0x2db
>   [...]  mount_block_root+0x1d3/0x1e6
>   [...]  prepare_namespace+0x136/0x165
>   [...]  kernel_init_freeable+0x25c/0x286
>   [...]  ? rest_init+0xd0/0xd0
>   [...]  kernel_init+0x16/0x130
>   [...]  ret_from_fork+0x22/0x30
>   [...]  </TASK>
>   [...] Kernel Offset: 0x18600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
> 
> This prevents the system from booting.
> 
> Adding the 'rootwait' option to the kernel commandline as mentioned in a
> similar-sounding upstream bug prevents the panic, but the system pauses,
> seemingly forever, without finding the filesystem to mount.
> 
> The reason that I believe this is a regression is:
> 
>  - The problem does _not_ occur for the non-rt build (6.1.0-1-amd64)
>  - The problem does _not_ occur with a recent rt build (6.0.0.6-rt-amd64)

Can you please try with 6.1.7-1 which is present in unstable?

Regards,
Salvatore

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Bug#1029336: Regression: unable to mount root fs on unknown-block James Addison <jay@jp-hosting.net> - 2023-01-21 13:50 +0100
  Bug#1029336: Regression: unable to mount root fs on unknown-block Salvatore Bonaccorso <carnil@debian.org> - 2023-01-21 15:00 +0100
  Bug#1029336: Regression: unable to mount root fs on unknown-block James Addison <jay@jp-hosting.net> - 2023-01-21 19:30 +0100
    Bug#1029336: Regression: unable to mount root fs on unknown-block Salvatore Bonaccorso <carnil@debian.org> - 2023-01-21 20:40 +0100
  Bug#1029336: marked as done (Regression: unable to mount root fs  on unknown-block) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2023-01-21 20:40 +0100

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