6.1.48 regression at boot : WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:572 apply_returns+0x1e4/0x210

[Toralf Förster]

I do get a

missing return thunk: 0xffffffff948a73fe-srso_untrain_ret+0x0/0x2: e9 7b 
92 35 ff
WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:572 
apply_returns+0x1e4/0x210
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G                T  6.1.48 #38
Hardware name: LENOVO 21J5002FGE/21J5002FGE, BIOS R23ET60W (1.30 ) 
09/14/2022
RIP: 0010:apply_returns+0x1e4/0x210
Code: 36 01 00 0f 85 f7 fe ff ff 49 89 d8 b9 05 00 00 00 4c 89 f2 48 89 
de 48 c7 c7 e8 7e ff 93 c6 05 22 7d 36 01 01 e8 8c a9 09 00 <0f> 0b e9 
cf fe ff ff c7 84 24 81 00 00 00 cc cc cc cc 42 c7 44 38
RSP: 0000:ffffffff94203e00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff948a73fe RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff9488601c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff948866e8
R13: cccccccccccccccc R14: ffffffff93c0067e R15: ffffffff94219118
FS:  0000000000000000(0000) GS:ffff97dcdee00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff97d6f4c01000 CR3: 0000000234210000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 <TASK>
 ? __warn+0x6f/0xc0
 ? apply_returns+0x1e4/0x210
 ? report_bug+0xdb/0x140
 ? handle_bug+0x3c/0x70
 ? exc_invalid_op+0x17/0x80
 ? asm_exc_invalid_op+0x1a/0x20
 ? retbleed_return_thunk+0x7e/0x7e
 ? apply_returns+0x1e4/0x210
 ? _raw_spin_unlock_irqrestore+0xd/0x30
 alternative_instructions+0x68/0x1e1
 arch_cpu_finalize_init+0x48/0x9a
 start_kernel+0x789/0x877
 secondary_startup_64_no_verify+0xd3/0xdb
 </TASK>
---[ end trace 0000000000000000 ]---

here at a

Linux p14s 6.1.48 #38 SMP Sat Aug 26 15:41:04 CEST 2023 x86_64 AMD Ryzen 
7 PRO 6850U with Radeon Graphics AuthenticAMD GNU/Linux

Otherwise the kernel seems to work fine.
--
Toralf

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