XPost: linux.debian.bugs.dist 
 From: carnil@debian.org 
  
 Control: tags -1 + moreinfo 
  
 On Wed, Sep 03, 2025 at 10:16:24AM -0400, willed-anvil-elude@duck.com wrote: 
 > Package: src:linux 
 > Version: 6.12.41-1 
 > Severity: important 
 > X-Debbugs-Cc: willed-anvil-elude@duck.com 
 > 
 > Dear Maintainer, 
 > 
 > Most Flatpak apps have suddenly broken on my Debian Stable ("Trixie") 
 > installation. They were working normally until I ran a `flatpak update` 
 today 
 > after several weeks without updating the Flatpak system, but now the apps 
 fail 
 > to launch. I have confirmed that the base OS runs fine until the first 
 time I 
 > launch a Flatpak app, at which point it causes a kernel oops in the 
 `nouveau` 
 > module. 
 > 
 > I tried completely uninstalling and reinstalling all Flatpak-related Debian 
 > packages, and I renamed `~/.local/share/flatpak` and `/var/lib/flatpak` and 
 > tried starting fresh with Flatpak, but it made no difference. 
 > 
 > My hardware is a laptop with hybrid Intel / Nvidia graphics, but I don't 
 use 
 > the Nvidia card at all. I even tried uninstalling the `xserver-xorg-video- 
 > nouveau` package, but somehow the `nouveau` module was still loading, I 
 imagine 
 > coming from the Flatpak environment. 
 > 
 > When I boot with the kernel command line `module_blacklist=nouveau` this 
 bug 
 > does **not** happen. This bug happens with the oldest Debian Trixie 
 released 
 > kernel version (6.12.31-amd64) as well as the latest one (6.12 
 41+deb13-amd64). 
 > What changed on my system leading to this bug was the Flatpak framework 
 > updates, however in my bug report to them 
 > (https://github.com/flatpak/flatpak/issues/6307) they say it's a kernel 
 bug. 
 > 
 > Here's the `dmesg` output that corresponds exactly to the moment that a 
 Flatpak 
 > app is launched: 
 > 
 > ``````````````````````````````````````````` 
 > [Tue Sep  2 23:31:49 2025] BUG: kernel NULL pointer dereference, address: 
 > 0000000000000000 
 > [Tue Sep  2 23:31:49 2025] #PF: supervisor read access in kernel mode 
 > [Tue Sep  2 23:31:49 2025] #PF: error_code(0x0000) - not-present page 
 > [Tue Sep  2 23:31:49 2025] PGD 0 P4D 0 
 > [Tue Sep  2 23:31:49 2025] Oops: Oops: 0000 [#3] PREEMPT SMP PTI 
 > [Tue Sep  2 23:31:49 2025] CPU: 6 UID: 1000 PID: 4820 Comm: com.github.tchx 
 > Tainted: G      D            6.12.31-amd64 #1  Debian 6.12.31-1 
 > [Tue Sep  2 23:31:49 2025] Tainted: [D]=DIE 
 > [Tue Sep  2 23:31:49 2025] Hardware name: Intel(R) Client Systems 
 > LAPQC71A/LAPQC71A, BIOS QCCFL357.0144.2022.0124.1433 01/24/2022 
 > [Tue Sep  2 23:31:49 2025] RIP: 0010:nvkm_gr_units+0x9/0x30 [nouveau] 
 > [Tue Sep  2 23:31:49 2025] Code: 74 06 ff e0 cc 66 90 cc 31 c0 c3 cc cc cc 
 cc 
 > 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 0f 1f 44 
 00 
 > 00 <48> 8b 07 48 8b 40 58 48 85 c0 74 06 ff e0 cc 66 90 cc 31 c0 c3 cc 
 > [Tue Sep  2 23:31:49 2025] RSP: 0018:ffffa1f38f267b40 EFLAGS: 00010246 
 > [Tue Sep  2 23:31:49 2025] RAX: ffff92a3ba38e000 RBX: ffffa1f38f267c20 RCX: 
 > ffff92a3871f2800 
 > [Tue Sep  2 23:31:49 2025] RDX: ffff92a599362c00 RSI: ffffa1f38f267c20 RDI: 
 > 0000000000000000 
 > [Tue Sep  2 23:31:49 2025] RBP: ffff92a4ab71d000 R08: 000000000000000d R09: 
 > 00000000000012d4 
 > [Tue Sep  2 23:31:49 2025] R10: 0000000000000010 R11: 0000000000000012 R12: 
 > ffffffffc0bb61f0 
 > [Tue Sep  2 23:31:49 2025] R13: ffffa1f38f267c20 R14: ffff92a3ba386000 R15: 
 > 0000000000000010 
 > [Tue Sep  2 23:31:49 2025] FS:  00007fe43b074940(0000) 
 > GS:ffff92ab1db00000(0000) knlGS:0000000000000000 
 > [Tue Sep  2 23:31:49 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 
 0000000080050033 
 > [Tue Sep  2 23:31:49 2025] CR2: 0000000000000000 CR3: 000000030ae00001 CR4: 
 > 00000000003726f0 
 > [Tue Sep  2 23:31:49 2025] Call Trace: 
 > [Tue Sep  2 23:31:49 2025]   
 > [Tue Sep  2 23:31:49 2025]  nouveau_abi16_ioctl_getparam+0x2aa/0x350 
 [nouveau] 
 > [Tue Sep  2 23:31:49 2025]  ? tomoyo_init_request_info+0x99/0xc0 
 > [Tue Sep  2 23:31:49 2025]  drm_ioctl_kernel+0xad/0x100 [drm] 
 > [Tue Sep  2 23:31:49 2025]  drm_ioctl+0x277/0x4f0 [drm] 
 > [Tue Sep  2 23:31:49 2025]  ? __pfx_nouveau_abi16_ioctl_getparam+0x10/0x10 
 > [nouveau] 
 > [Tue Sep  2 23:31:49 2025]  nouveau_drm_ioctl+0x57/0xb0 [nouveau] 
 > [Tue Sep  2 23:31:49 2025]  __x64_sys_ioctl+0x91/0xd0 
 > [Tue Sep  2 23:31:49 2025]  do_syscall_64+0x82/0x190 
 > [Tue Sep  2 23:31:49 2025]  ? __pfx_nouveau_abi16_ioctl_getparam+0x10/0x10 
 > [nouveau] 
 > [Tue Sep  2 23:31:49 2025]  ? __pm_runtime_suspend+0x69/0xc0 
 > [Tue Sep  2 23:31:49 2025]  ? nouveau_drm_ioctl+0x7a/0xb0 [nouveau] 
 > [Tue Sep  2 23:31:49 2025]  ? syscall_exit_to_user_mode+0x4d/0x210 
 > [Tue Sep  2 23:31:49 2025]  ? do_syscall_64+0x8e/0x190 
 > [Tue Sep  2 23:31:49 2025]  ? syscall_exit_to_user_mode+0x4d/0x210 
 > [Tue Sep  2 23:31:49 2025]  ? do_syscall_64+0x8e/0x190 
 > [Tue Sep  2 23:31:49 2025]  ? exc_page_fault+0x7e/0x180 
 > [Tue Sep  2 23:31:49 2025]  entry_SYSCALL_64_after_hwframe+0x76/0x7e 
 > [Tue Sep  2 23:31:49 2025] RIP: 0033:0x7fe43d11988d 
 > [Tue Sep  2 23:31:49 2025] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 
 45 
 > 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 
 0f 
 > 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00 
 > [Tue Sep  2 23:31:49 2025] RSP: 002b:00007fff980905a0 EFLAGS: 00000246 
 > ORIG_RAX: 0000000000000010 
 > [Tue Sep  2 23:31:49 2025] RAX: ffffffffffffffda RBX: 00005630873e6e90 RCX: 
 > 00007fe43d11988d 
 > [Tue Sep  2 23:31:49 2025] RDX: 00007fff98090660 RSI: 00000000c0106440 RDI: 
 > 0000000000000012 
 > [Tue Sep  2 23:31:49 2025] RBP: 00007fff980905f0 R08: 0000000000002191 R09: 
 > 000017aa381e0000 
 > [Tue Sep  2 23:31:49 2025] R10: 00007fe3bff088c0 R11: 0000000000000246 R12: 
 > 00007fff98090660 
 > [Tue Sep  2 23:31:49 2025] R13: 00000000c0106440 R14: 0000000000000012 R15: 
 > 0000563087434560 
 > [Tue Sep  2 23:31:49 2025]   
 > [Tue Sep  2 23:31:49 2025] Modules linked in: uinput ccm snd_seq_dummy 
 > snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq 
 snd_seq_device 
 > rfcomm cmac algif_hash algif_skcipher af_alg bnep zram lz4hc_compress 
  
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