XPost: linux.debian.bugs.dist   
   From: carnil@debian.org   
      
   Control: tags -1 + moreinfo   
      
   Hi Reinhard,   
      
   On Tue, Jan 13, 2026 at 05:40:04PM +0100, Reinhard Eilmsteiner wrote:   
   > Package: src:linux   
   > Version: 6.12.63-1   
   > Severity: important   
   >   
   > Dear Maintainer,   
   >   
   > It used to work with kernel version 6.12.57+deb13-amd64 - after update   
   > it ceased working.   
   >   
   > When doing   
   >   
   > mount -t ceph -o name=... cn1,cn2,cn3:/directory /remote/mountpoint   
   > ls /remote/mountpoint results in   
   >   
   > Killed   
   >   
   > instead of   
   >   
   > A normal directory listing   
   >   
   >   
   > -- Package-specific info:   
   > ** Version:   
   > Linux version 6.12.63+deb13-amd64 (debian-kernel@lists.debian.org)   
   > (x86_64-linux-gnu-gcc-14 (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for   
   > Debian) 2.44) #1 SMP PREEMPT_DYNAMIC Debian 6.12.63-1 (2025-12-30)   
   >   
   > ** Command line:   
   > BOOT_IMAGE=/boot/vmlinuz-6.12.63+deb13-amd64   
   > root=UUID=2f64ca89-8847-4677-bd7b-924c24d36004 ro quiet   
   >   
   > ** Tainted: D (128)   
   > * kernel died recently, i.e. there was an OOPS or BUG   
   >   
   > ** Kernel log:   
   > [269737.358350] nfs: server uru.eilm.at not responding, timed out   
   > [269742.478091] nfs: server uru.eilm.at not responding, timed out   
   > [269746.062291] nfs: server uru.eilm.at not responding, timed out   
   > [269751.185972] nfs: server uru.eilm.at not responding, timed out   
   > [269756.301995] nfs: server uru.eilm.at not responding, timed out   
   > [269761.422136] nfs: server uru.eilm.at not responding, timed out   
   > [269766.541884] nfs: server uru.eilm.at not responding, timed out   
   > [269771.617882] nfs: server uru.eilm.at not responding, timed out   
   > [269782.157826] nfs: server uru.eilm.at not responding, timed out   
   > [269792.397717] nfs: server uru.eilm.at not responding, timed out   
   > [269802.637736] nfs: server uru.eilm.at not responding, timed out   
   > [269806.221818] nfs: server uru.eilm.at not responding, timed out   
   > [269811.341919] nfs: server uru.eilm.at not responding, timed out   
   > [269816.465888] nfs: server uru.eilm.at not responding, timed out   
   > [269821.581608] nfs: server uru.eilm.at not responding, timed out   
   > [269836.941722] nfs: server uru.eilm.at not responding, timed out   
   > [269847.437601] nfs: server uru.eilm.at not responding, timed out   
   > [269857.677476] nfs: server uru.eilm.at not responding, timed out   
   > [269866.349444] nfs: server uru.eilm.at not responding, timed out   
   > [269871.501459] nfs: server uru.eilm.at not responding, timed out   
   > [269876.621299] nfs: server uru.eilm.at not responding, timed out   
   > [269886.862133] nfs: server uru.eilm.at not responding, timed out   
   > [269902.221980] nfs: server uru.eilm.at not responding, timed out   
   > [269912.749841] nfs: server uru.eilm.at not responding, timed out   
   > [269922.958017] nfs: server uru.eilm.at not responding, timed out   
   > [269926.481796] nfs: server uru.eilm.at not responding, timed out   
   > [269931.629699] nfs: server uru.eilm.at not responding, timed out   
   > [269936.813886] nfs: server uru.eilm.at not responding, timed out   
   > [269941.901703] nfs: server uru.eilm.at not responding, timed out   
   > [269952.141759] nfs: server uru.eilm.at not responding, timed out   
   > [269963.219324] libceph: mon1 (1)192.168.0.23:6789 session established   
   > [269963.219593] libceph: client27727483 fsid   
   > dae8b6ab-51f8-4d68-8539-9998ea8d83d3   
   > [269963.767779] BUG: kernel NULL pointer dereference, address:   
   > 0000000000000000   
   > [269963.767818] #PF: supervisor read access in kernel mode   
   > [269963.767963] #PF: error_code(0x0000) - not-present page   
   > [269963.768102] PGD 0 P4D 0 [269963.768279] Oops: Oops: 0000 [#1] PREEMPT   
   > SMP PTI   
   > [269963.768439] CPU: 0 UID: 2000 PID: 527382 Comm: ls Not tainted   
   > 6.12.63+deb13-amd64 #1 Debian 6.12.63-1   
   > [269963.768482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS   
   > rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014   
   > [269963.768495] RIP: 0010:strcmp+0x1c/0x40   
   > [269963.771968] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa   
   > 31 c0 eb 10 0f 1f 84 00 00 00 00 00 48 83 c0 01 84 d2 74 13 0f b6 14 07 <3a>   
   > 14 06 74 ef 19 c0 83 c8 01 c3 cc cc cc cc 31 c0 c3 cc cc cc cc   
   > [269963.772140] RSP: 0018:ffffbe6dc8d07a80 EFLAGS: 00010246   
   > [269963.772158] RAX: 0000000000000000 RBX: ffff9a1eb73834c0 RCX:   
   > ffffffffb824c704   
   > [269963.772169] RDX: 0000000000000066 RSI: 0000000000000000 RDI:   
   > ffff9a1e87b34908   
   > [269963.772177] RBP: 00000000000007d0 R08: 0000000000000000 R09:   
   > 0000000000000000   
   > [269963.772184] R10: ffff9a1e80ac3000 R11: 0000000000000002 R12:   
   > 0000000000000000   
   > [269963.772192] R13: ffff9a1d83c72000 R14: ffff9a1ea1f8a000 R15:   
   > ffff9a1e8610b800   
   > [269963.772200] FS: 00007fc109279240(0000) GS:ffff9a1eb8c00000(0000)   
   > knlGS:0000000000000000   
   > [269963.772208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033   
   > [269963.772215] CR2: 0000000000000000 CR3: 0000000051722000 CR4:   
   > 00000000000006f0   
   > [269963.772226] Call Trace:   
   > [269963.772425]    
   > [269963.772449] ceph_mds_check_access+0x10c/0x790 [ceph]   
   > [269963.772496] ceph_open+0x171/0x5c0 [ceph]   
   > [269963.772654] ? __pfx_ceph_open+0x10/0x10 [ceph]   
   > [269963.772781] do_dentry_open+0x14f/0x440   
   > [269963.774839] vfs_open+0x2e/0xe0   
   > [269963.775250] path_openat+0x82e/0x12d0   
   > [269963.775849] ? __pte_offset_map+0x1b/0x180   
   > [269963.776581] do_filp_open+0xc4/0x170   
   > [269963.776692] do_sys_openat2+0xae/0xe0   
   > [269963.776798] __x64_sys_openat+0x55/0xa0   
   > [269963.776907] do_syscall_64+0x82/0x190   
   > [269963.777464] ? __count_memcg_events+0x53/0xf0   
   > [269963.777883] ? count_memcg_events.constprop.0+0x1a/0x30   
   > [269963.777993] ? handle_mm_fault+0x1bb/0x2c0   
   > [269963.778102] ? do_user_addr_fault+0x36c/0x620   
   > [269963.778711] ? arch_exit_to_user_mode_prepare.isra.0+0x16/0xa0   
   > [269963.779073] entry_SYSCALL_64_after_hwframe+0x76/0x7e   
   > [269963.779375] RIP: 0033:0x7fc10942db7c   
   > [269963.779509] Code: 4c 89 54 24 18 41 89 f2 41 83 e2 40 75 40 89 f0 f7 d0   
   > a9 00 00 41 00 74 35 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48>   
      
   [continued in next message]   
      
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