XPost: linux.debian.bugs.dist, linux.kernel 
 From: carnil@debian.org 
  
 Hi Benoit, 
  
 On Mon, Aug 18, 2025 at 02:31:30PM +0200, Salvatore Bonaccorso wrote: 
 > Hi, 
 > 
 > A user in Debian reported the following kernel oops when running on 
 > 6.12.41 (but apparently as well on older versions, though there were 
 > several netfs related similar issues, so including Max Kellermann as 
 > well in the recipients) 
 > 
 > The report from Benoit Panizzon is as follows: 
 > 
 > > From: Benoit Panizzon  
 > > Resent-From: Benoit Panizzon  
 > > Reply-To: Benoit Panizzon , 1111455@bugs.debian.org 
 > > X-Mailer: reportbug 13.2.0 
 > > Date: Mon, 18 Aug 2025 10:24:32 +0200 
 > > To: Debian Bug Tracking System  
 > > Subject: Bug#1111455: linux-image-6.12.41+deb13-amd64: kernel BUG at 
 fs/netfs/read_collect.c:316 netfs: Can't donate 
 > >  prior to front 
 > > Delivered-To: lists-debian-kernel@bendel.debian.org 
 > > Delivered-To: submit@bugs.debian.org 
 > > Message-ID: <175550547264.3745.5845128440223069497.reportbug@go.imp.ch> 
 > > 
 > > Package: src:linux 
 > > Version: 6.12.41-1 
 > > Severity: grave 
 > > Justification: renders package unusable 
 > > X-Debbugs-Cc: debian-amd64@lists.debian.org 
 > > User: debian-amd64@lists.debian.org 
 > > Usertags: amd64 
 > > 
 > > Dear Maintainer, 
 > > 
 > > Updated my workstation from Bookworm to Trixie. /home on NFS 
 > > 
 > > Applications accessing data on NFS shares become unresponsive one after 
 the other after a couple of minutes. 
 > > 
 > > Especially affected: 
 > > * Claws-Mail 
 > > * Chromium 
 > > 
 > > Suspected cachefsd being the culpit and disabled - issue persists. 
 > > 
 > > It looks like an invalid opcode is being used. Fairly recent CPU in use: 
 > > 
 > > vendor_id : AuthenticAMD 
 > > cpu family : 25 
 > > model  : 80 
 > > model name : AMD Ryzen 7 PRO 5750GE with Radeon Graphics 
 > > stepping : 0 
 > > microcode : 0xa500011 
 > > 
 > > Google found reports of others affected with similar kernel versions 
 mostly when accessing SMB shares. 
 > > 
 > > [Mo Aug 18 10:11:19 2025] netfs: Can't donate prior to front 
 > > [Mo Aug 18 10:11:19 2025] R=00001e07[4] s=6000-7fff 0/2000/2000 
 > > [Mo Aug 18 10:11:19 2025] folio: 4000-7fff 
 > > [Mo Aug 18 10:11:19 2025] donated: prev=0 next=0 
 > > [Mo Aug 18 10:11:19 2025] s=6000 av=2000 part=2000 
 > > [Mo Aug 18 10:11:19 2025] ------------[ cut here ]------------ 
 > > [Mo Aug 18 10:11:19 2025] kernel BUG at fs/netfs/read_collect.c:316! 
 > > [Mo Aug 18 10:11:19 2025] Oops: invalid opcode: 0000 [#1] PREEMPT SMP 
 NOPTI 
 > > [Mo Aug 18 10:11:19 2025] CPU: 5 UID: 0 PID: 115 Comm: kworker/u64:1 Not 
 tainted 6.12.41+deb13-amd64 #1  Debian 6.12.41-1 
 > > [Mo Aug 18 10:11:19 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS 
 M47KT26A 11/23/2022 
 > > [Mo Aug 18 10:11:19 2025] Workqueue: nfsiod rpc_async_release [sunrpc] 
 > > [Mo Aug 18 10:11:19 2025] RIP: 0010:netfs_consume_read_data. 
 sra.0+0xb79/0xb80 [netfs] 
 > > [Mo Aug 18 10:11:19 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 95 6f c2 e8 d0 
 8d a2 e1 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 95 6f c2 e8 b7 
 8d 
 a2 e1 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 
 > > [Mo Aug 18 10:11:19 2025] RSP: 0018:ffffb4234057bd58 EFLAGS: 00010246 
 > > [Mo Aug 18 10:11:19 2025] RAX: 0000000000000018 RBX: ffff9aed62651ec0 
 RCX: 
 0000000000000027 
 > > [Mo Aug 18 10:11:19 2025] RDX: 0000000000000000 RSI: 0000000000000001 
 RDI: 
 ffff9af04e4a1740 
 > > [Mo Aug 18 10:11:19 2025] RBP: 0000000000000000 R08: 0000000000000000 
 R09: 
 ffffb4234057bbe8 
 > > [Mo Aug 18 10:11:19 2025] R10: ffffffffa50b43a8 R11: 0000000000000003 
 R12: 
 ffff9aed6c9081e8 
 > > [Mo Aug 18 10:11:19 2025] R13: 0000000000004000 R14: ffff9aed6c9081e8 
 R15: 
 0000000000006000 
 > > [Mo Aug 18 10:11:19 2025] FS:  0000000000000000(0000) GS:fff 
 9af04e480000(0000) knlGS:0000000000000000 
 > > [Mo Aug 18 10:11:19 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 
 0000000080050033 
 > > [Mo Aug 18 10:11:19 2025] CR2: 00003d3407849020 CR3: 00000002f1822000 
 CR4: 
 0000000000f50ef0 
 > > [Mo Aug 18 10:11:19 2025] PKRU: 55555554 
 > > [Mo Aug 18 10:11:19 2025] Call Trace: 
 > > [Mo Aug 18 10:11:19 2025]   
 > > [Mo Aug 18 10:11:19 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 
 [netfs] 
 > > [Mo Aug 18 10:11:19 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs] 
 > > [Mo Aug 18 10:11:19 2025]  nfs_read_completion+0xf6/0x130 [nfs] 
 > > [Mo Aug 18 10:11:19 2025]  rpc_free_task+0x39/0x60 [sunrpc] 
 > > [Mo Aug 18 10:11:19 2025]  rpc_async_release+0x2f/0x40 [sunrpc] 
 > > [Mo Aug 18 10:11:19 2025]  process_one_work+0x177/0x330 
 > > [Mo Aug 18 10:11:19 2025]  worker_thread+0x251/0x390 
 > > [Mo Aug 18 10:11:19 2025]  ? __pfx_worker_thread+0x10/0x10 
 > > [Mo Aug 18 10:11:19 2025]  kthread+0xd2/0x100 
 > > [Mo Aug 18 10:11:19 2025]  ? __pfx_kthread+0x10/0x10 
 > > [Mo Aug 18 10:11:19 2025]  ret_from_fork+0x34/0x50 
 > > [Mo Aug 18 10:11:19 2025]  ? __pfx_kthread+0x10/0x10 
 > > [Mo Aug 18 10:11:19 2025]  ret_from_fork_asm+0x1a/0x30 
 > > [Mo Aug 18 10:11:19 2025]   
  
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