Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic]

From	Naman Jain <namjain@linux.microsoft.com>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic]
Date	2025-11-26 07:20 +0100
Message-ID	<LVh2F-fOPj-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <LR9Q5-d046-1@gated-at.bofh.it> <LRks9-d7yY-3@gated-at.bofh.it> <LVh2F-fOPj-3@gated-at.bofh.it> <LQrYJ-cvPu-1@gated-at.bofh.it> <LVh2F-fOPj-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 3 groups.

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On 11/21/2025 3:34 PM, Peter Morrow wrote:
> Hi Naman/Salvatore,
> 
> Is it possible to get this fixed in the 6.1 LTS series too? I just ran
> into this crash when moving from bookworm based Debian kernel
> 6.1.153-1 to 6.1.158-1. I saw that "uio_hv_generic: Let userspace take
> care of interrupt mask" appeared in 6.1.156.
> 
> Thanks,
> Peter.
> 


Hi Peter,
Yes, I have sent a patch for older kernel versions as well.
I am working to fix the review comments and send new revisions.

Here is the link:
https://lore.kernel.org/all/20251115085937.2237-1-namjain@linux.microsoft.com/


Regards,
Naman

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Bug#1120602: hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0 Peter Morrow <pdmorrow@gmail.com> - 2025-11-13 00:00 +0100
  Processed: Re: Bug#1120602: hyper-v: BUG: kernel NULL pointer  dereference, address: 00000000000000a0 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-11-13 07:30 +0100
  Bug#1120602: hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0 Salvatore Bonaccorso <carnil@debian.org> - 2025-11-13 07:30 +0100
  Bug#1120602: hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0 Peter Morrow <pdmorrow@gmail.com> - 2025-11-13 14:40 +0100
  Processed: Re: Bug#1120602: hyper-v: BUG: kernel NULL pointer  dereference, address: 00000000000000a0 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-11-13 15:00 +0100
  Bug#1120602: hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0 Salvatore Bonaccorso <carnil@debian.org> - 2025-11-13 15:00 +0100
    Bug#1120602: hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0 Peter Morrow <pdmorrow@gmail.com> - 2025-11-13 15:40 +0100
  Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic] Naman Jain <namjain@linux.microsoft.com> - 2025-11-14 07:10 +0100
  Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic] Naman Jain <namjain@linux.microsoft.com> - 2025-11-14 15:40 +0100
    Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic] Salvatore Bonaccorso <carnil@debian.org> - 2025-11-14 22:50 +0100
      Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic] Naman Jain <namjain@linux.microsoft.com> - 2025-11-15 10:10 +0100
  Bug#1120602: [REGRESSION 6.12.y] hyper-v: BUG: kernel NULL pointer dereference, address: 00000000000000a0: RIP: 0010:hv_uio_channel_cb+0xd/0x20 [uio_hv_generic] Naman Jain <namjain@linux.microsoft.com> - 2025-11-26 07:20 +0100

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