$ cp a b
[1] 14158 killed cp -i a

$ sudo dmesg|rg -A 5 -B 5 14158
[23137.918971] BUG: kernel NULL pointer dereference, address: 0000000000000000
[23137.918977] #PF: supervisor read access in kernel mode
[23137.918980] #PF: error_code(0x0000) - not-present page
[23137.918981] PGD 0 P4D 0
[23137.918984] Oops: 0000 [#3] PREEMPT SMP PTI
[23137.918987] CPU: 4 PID: 14158 Comm: cp Tainted: G D 6.1.69-1-lts #1 eff0ddd5227e209a32919e73ae84ae76aa3926a1
[23137.918991] Hardware name: Dell Inc. OptiPlex 9020/01PCY1, BIOS A07 04/25/2014
[23137.918992] RIP: 0010:cifs_flush_folio+0x3f/0x100 [cifs]
[23137.919130] Code: d2 41 54 49 89 cc 31 c9 55 48 89 f5 48 c1 ee 0c 53 48 83 ec 08 48 8b 7f 30 e8 bd 12 a2 cb 48 3d 00 f0 ff ff 0f 87 a5 00 00 00 <48> 8b 10 48 89 c3 b8 00 10 00 00 f7 c2 00 00 01 00 74 07 0f b6 4b
[23137.919132] RSP: 0018:ffffaf44c829fc28 EFLAGS: 00010207
[23137.919134] RAX: 0000000000000000 RBX: 0000000000002cdd RCX: 0000000000000000
--
FROM 42.228.55.*