sh-5.2# echo a | grep a > /dev/null
[  137.724183] BUG: kernel NULL pointer dereference, address: 0000000000000000
[  137.726038] #PF: supervisor read access in kernel mode
[  137.727408] #PF: error_code(0x0000) - not-present page
[  137.728757] PGD 0 P4D 0
[  137.729454] Oops: 0000 [#1] PREEMPT SMP PTI
[  137.730574] CPU: 1 PID: 227 Comm: grep Not tainted 6.4.0-12317-g1b28a3c9606a-dirty #1
[  137.732638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  137.735124] RIP: 0010:splice_from_pipe_next+0x6e/0x180
[  137.736514] Code: 80 fe 01 75 04 85 c9 75 62 8b 43 5c 44 8b 73 54 83 e8 01 44 21 f0 48 8d 14 80 48 8b 83 98 00 00 00 4c 8d 24 d0 49 8b 44 24 10 <48> 8b 00 48 85 c0 74 16
[  137.741360] RSP: 0018:ffff93c28037fd68 EFLAGS: 00010202
[  137.742755] RAX: 0000000000000000 RBX: ffff8ed7012bc600 RCX: 0000000000000000
[  137.744647] RDX: 0000000000000005 RSI: 0000000000000000 RDI: ffff8ed7012bc600
[  137.746525] RBP: ffff93c28037fde0 R08: 0000000000000001 R09: ffffffffa6228df0
[  137.748414] R10: 0000000000018000 R11: 0000000000000000 R12: ffff8ed701e04828
[  137.750288] R13: ffff8ed701d68000 R14: 0000000000000001 R15: ffff93c28037fde0
[  137.752178] FS:  00007fe8d094d740(0000) GS:ffff8ed71d900000(0000) knlGS:0000000000000000
[  137.754293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  137.755845] CR2: 0000000000000000 CR3: 0000000002aba000 CR4: 00000000000006e0
[  137.757734] Call Trace:
[  137.758436]  <TASK>
[  137.759035]  ? __die+0x1e/0x60
[  137.759893]  ? page_fault_oops+0x17c/0x470
[  137.760989]  ? search_module_extables+0x14/0x50
[  137.762201]  ? exc_page_fault+0x67/0x150
[  137.763251]  ? asm_exc_page_fault+0x26/0x30
[  137.764378]  ? __pfx_pipe_to_null+0x10/0x10
[  137.765494]  ? splice_from_pipe_next+0x6e/0x180
[  137.766703]  __splice_from_pipe+0x39/0x1c0
[  137.767807]  ? __pfx_pipe_to_null+0x10/0x10
[  137.768922]  ? __pfx_pipe_to_null+0x10/0x10
[  137.770039]  splice_from_pipe+0x5c/0x90
[  137.771069]  do_splice+0x35c/0x840
[  137.772002]  __do_splice+0x1eb/0x210
[  137.772975]  __x64_sys_splice+0xad/0x120
[  137.774027]  do_syscall_64+0x3e/0x90
[  137.774999]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[  137.776363] RIP: 0033:0x7fe8d0a58dd3
[  137.777335] Code: 64 89 02 48 c7 c0 ff ff ff ff eb b9 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d 11 18 0d 00 00 49 89 ca 74 14 b8 13 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 74
[  137.781970] RSP: 002b:00007ffe3e611af8 EFLAGS: 00000202 ORIG_RAX: 0000000000000113
[  137.783801] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe8d0a58dd3
[  137.785516] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
[  137.787229] RBP: 0000558b41c02000 R08: 0000000000018000 R09: 0000000000000001
[  137.788954] R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
[  137.790666] R13: 0000558b41c02002 R14: 0000558b41c02000 R15: 0000000000000000
[  137.792280]  </TASK>
[  137.792767] Modules linked in:
[  137.793445] CR2: 0000000000000000
[  137.794224] ---[ end trace 0000000000000000 ]---
[  137.795235] RIP: 0010:splice_from_pipe_next+0x6e/0x180
[  137.796378] Code: 80 fe 01 75 04 85 c9 75 62 8b 43 5c 44 8b 73 54 83 e8 01 44 21 f0 48 8d 14 80 48 8b 83 98 00 00 00 4c 8d 24 d0 49 8b 44 24 10 <48> 8b 00 48 85 c0 74 16
[  137.800291] RSP: 0018:ffff93c28037fd68 EFLAGS: 00010202
[  137.801430] RAX: 0000000000000000 RBX: ffff8ed7012bc600 RCX: 0000000000000000
[  137.802958] RDX: 0000000000000005 RSI: 0000000000000000 RDI: ffff8ed7012bc600
[  137.804462] RBP: ffff93c28037fde0 R08: 0000000000000001 R09: ffffffffa6228df0
[  137.805915] R10: 0000000000018000 R11: 0000000000000000 R12: ffff8ed701e04828
[  137.807389] R13: ffff8ed701d68000 R14: 0000000000000001 R15: ffff93c28037fde0
[  137.808837] FS:  00007fe8d094d740(0000) GS:ffff8ed71d900000(0000) knlGS:0000000000000000
[  137.810467] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  137.811662] CR2: 0000000000000000 CR3: 0000000002aba000 CR4: 00000000000006e0