linux-kernel - [linus:master] [x86/srso] fb3bd914b3: WARNING:at_arch/x86/kernel/alternative.c:#apply

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Date:   Mon, 14 Aug 2023 16:30:45 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <oliver.sang@...el.com>
Subject: [linus:master] [x86/srso]  fb3bd914b3:
 WARNING:at_arch/x86/kernel/alternative.c:#apply_returns



Hello,

kernel test robot noticed "WARNING:at_arch/x86/kernel/alternative.c:#apply_returns" on:

commit: fb3bd914b3ec28f5fb697ac55c4846ac2d542855 ("x86/srso: Add a Speculative RAS Overflow mitigation")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master v6.5-rc6]
[test failed on linux-next/master 21ef7b1e17d039053edaeaf41142423810572741]

in testcase: boot

compiler: clang-16
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202308141043.79d160a1-oliver.sang@intel.com



[   13.866672][    T0] ------------[ cut here ]------------
[   13.867512][    T0] missing return thunk: __ret+0x5/0x7e-__ret+0x0/0x7e: e9 f6 ff ff ff
[   13.868538][    T0] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:755 apply_returns+0x351/0x700
[   13.870993][    T0] Modules linked in:
[   13.871543][    T0] CPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0-rc2-00002-gfb3bd914b3ec #1
[   13.872689][    T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[   13.874057][    T0] RIP: 0010:apply_returns+0x351/0x700
[   13.874615][    T0] Code: e9 4d ff ff ff c6 05 15 cc 49 03 01 48 c7 c7 60 bf 01 83 4c 89 ea b9 05 00 00 00 90 48 8b 74 24 08 49 89 f0 e8 50 97 0e 00 90 <0f> 0b 90
 90 e9 1f ff ff ff 4d 85 ed 0f 84 4c ff ff ff 48 8b 74 24
[   13.877395][    T0] RSP: 0000:ffffffff83a07de0 EFLAGS: 00010246
[   13.878236][    T0] RAX: 0000000000000000 RBX: ffffffff82d32545 RCX: 0000000000000000
[   13.879355][    T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   13.880389][    T0] RBP: ffffffff83a07ed0 R08: 0000000000000000 R09: 0000000000000000
[   13.881461][    T0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[   13.882527][    T0] R13: ffffffff82d32540 R14: ffffffff846e9a58 R15: 1ffffffff0740fc9
[   13.883644][    T0] FS:  0000000000000000(0000) GS:ffffffff83ad5000(0000) knlGS:0000000000000000
[   13.884632][    T0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.885529][    T0] CR2: ffff88843ffff000 CR3: 0000000003ab6000 CR4: 00000000000406f0
[   13.886637][    T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   13.887727][    T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   13.888814][    T0] Call Trace:
[   13.889281][    T0]  <TASK>
[   13.889711][    T0]  ? show_regs+0x5b/0x70
[   13.890324][    T0]  ? __warn+0xe6/0x1f0
[   13.890942][    T0]  ? apply_returns+0x351/0x700
[   13.891612][    T0]  ? report_bug+0x15f/0x380
[   13.892229][    T0]  ? apply_returns+0x351/0x700
[   13.892920][    T0]  ? handle_bug+0x42/0x70
[   13.893544][    T0]  ? exc_invalid_op+0x1f/0x60
[   13.894618][    T0]  ? asm_exc_invalid_op+0x1f/0x30
[   13.895327][    T0]  ? zen_untrain_ret+0x1/0x1
[   13.895941][    T0]  ? __ret+0x5/0x7e
[   13.896491][    T0]  ? apply_returns+0x351/0x700
[   13.897131][    T0]  ? do_nanosleep+0x2ae/0x380
[   13.897766][    T0]  ? __ret+0x5/0x7e
[   13.898332][    T0]  ? __ret+0x5/0x7e
[   13.898872][    T0]  ? __ret+0x14/0x7e
[   13.899433][    T0]  ? __ret+0xa/0x7e
[   13.899974][    T0]  ? unregister_die_notifier+0x17/0x30
[   13.900751][    T0]  alternative_instructions+0x4b/0xa0
[   13.901514][    T0]  arch_cpu_finalize_init+0x3e/0xb0
[   13.902220][    T0]  start_kernel+0x2ff/0x3c0
[   13.902833][    T0]  x86_64_start_reservations+0x3c/0x40
[   13.903624][    T0]  x86_64_start_kernel+0x63/0x70
[   13.904627][    T0]  secondary_startup_64_no_verify+0x102/0x10b
[   13.905488][    T0]  </TASK>
[   13.905909][    T0] irq event stamp: 110211
[   13.906494][    T0] hardirqs last  enabled at (110219): [<ffffffff8121f433>] __up_console_sem+0xa3/0x100
[   13.907867][    T0] hardirqs last disabled at (110226): [<ffffffff8121f418>] __up_console_sem+0x88/0x100
[   13.909256][    T0] softirqs last  enabled at (110192): [<ffffffff82d31d74>] __do_softirq+0x4d4/0x631
[   13.910544][    T0] softirqs last disabled at (110185): [<ffffffff81148b49>] irq_exit_rcu+0x89/0xc0
[   13.914615][    T0] ---[ end trace 0000000000000000 ]---



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230814/202308141043.79d160a1-oliver.sang@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki