linux-kernel - Re: [linus:master] [cfi] 8b8ca9c25f: CFI_failure_at_do_basic

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Message-ID: <CAH5fLggdtev=scJ1C9EefZf-fVrMvgMbfD+b_T5vFfHqNTn8Kw@mail.gmail.com>
Date: Mon, 28 Oct 2024 09:33:47 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Sami Tolvanen <samitolvanen@...gle.com>
Cc: oe-lkp@...ts.linux.dev, lkp@...el.com, linux-kernel@...r.kernel.org, 
	kernel test robot <oliver.sang@...el.com>, Miguel Ojeda <ojeda@...nel.org>
Subject: Re: [linus:master] [cfi] 8b8ca9c25f: CFI_failure_at_do_basic_setup

On Mon, Oct 28, 2024 at 7:24 AM kernel test robot <oliver.sang@...el.com> wrote:
>
> Hello,
>
> by this change, the config has below difference with parent after building.
>
> --- /pkg/linux/x86_64-randconfig-003-20241025/clang-19/af0121c2d303111d363c62e40413ffb39d5dc0f1/.config 2024-10-26 03:31:02.494416152 +0800
> +++ /pkg/linux/x86_64-randconfig-003-20241025/clang-19/8b8ca9c25fe69c2162e3235c7d6c341127abeed6/.config 2024-10-25 23:52:03.899366299 +0800
> @@ -661,6 +661,8 @@ CONFIG_LTO_NONE=y
>  CONFIG_ARCH_SUPPORTS_CFI_CLANG=y
>  CONFIG_ARCH_USES_CFI_TRAPS=y
>  CONFIG_CFI_CLANG=y
> +CONFIG_CFI_ICALL_NORMALIZE_INTEGERS=y
> +CONFIG_HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG=y
>  # CONFIG_CFI_PERMISSIVE is not set
>  CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
>  CONFIG_HAVE_CONTEXT_TRACKING_USER=y
>
> then we noticed the boot jobs which can pass on parent, failed now.
>
> =========================================================================================
> tbox_group/testcase/rootfs/kconfig/compiler/sleep:
>   vm-snb/boot/yocto-x86_64-minimal-20190520.cgz/x86_64-randconfig-003-20241025/clang-19/1
>
> af0121c2d303111d 8b8ca9c25fe69c2162e3235c7d6
> ---------------- ---------------------------
>        fail:runs  %reproduction    fail:runs
>            |             |             |
>            :6          100%           6:6     dmesg.CFI_failure_at_do_basic_setup
>            :6          100%           6:6     dmesg.Kernel_panic-not_syncing:Fatal_exception
>            :6          100%           6:6     dmesg.Oops:invalid_opcode:#[##]PREEMPT_KASAN
>            :6          100%           6:6     dmesg.RIP:do_basic_setup
>            :6          100%           6:6     dmesg.boot_failures
>
>
> below report just FYI what we observed in our tests. thanks
>
>
> kernel test robot noticed "CFI_failure_at_do_basic_setup" on:
>
> commit: 8b8ca9c25fe69c2162e3235c7d6c341127abeed6 ("cfi: fix conditions for HAVE_CFI_ICALL_NORMALIZE_INTEGERS")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> [test failed on linus/master      c71f8fb4dc911022748a378b16aad1cc9b43aad8]
> [test failed on linux-next/master a39230ecf6b3057f5897bc4744a790070cfbe7a8]
>
> in testcase: boot
>
> config: x86_64-randconfig-003-20241025
> compiler: clang-19
> 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/202410281414.c351044e-oliver.sang@intel.com
>
>
>
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20241028/202410281414.c351044e-oliver.sang@intel.com
>
>
>
> [    7.616732][    T1] CFI failure at do_basic_setup+0x5b/0x90 (target: asan.module_ctor+0x0/0x20; expected type: 0xe5c47d60)
> [    7.617229][    T1] Oops: invalid opcode: 0000 [#1] PREEMPT KASAN
> [    7.617952][    T1] CPU: 0 UID: 0 PID: 1 Comm: swapper Not tainted 6.12.0-rc2-00005-g8b8ca9c25fe6 #1 c804d49ce32901c4caca8ebfe1766898b63e48de
> [    7.619334][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> [    7.620488][    T1] RIP: 0010:do_basic_setup+0x5b/0x90
> [    7.620842][    T1] Code: 00 fc ff df 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 6d 85 50 fb 4d 8b 5e f8 41 ba a0 82 3b 1a 45 03 53 fc 74 02 <0f> 0b 41 ff d3 49 81 fe 68 10 7e be 73 0f e8 8a eb 12 fb 48 83 c3
> [    7.620842][    T1] RSP: 0000:ffffc9000001fed0 EFLAGS: 00010286
> [    7.620842][    T1] RAX: 1ffffffff7cfb6de RBX: ffffffffbe7db6f0 RCX: 0000000000000000
> [    7.620842][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [    7.620842][    T1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
> [    7.620842][    T1] R10: 00000000bf7be9ac R11: ffffffffbbdc9360 R12: ffffffffbd039fc0
> [    7.620842][    T1] R13: 0000000000000000 R14: ffffffffbe7db6f8 R15: dffffc0000000000
> [    7.620842][    T1] FS:  0000000000000000(0000) GS:ffffffffbd0dc000(0000) knlGS:0000000000000000
> [    7.620842][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    7.620842][    T1] CR2: ffff88843ffff000 CR3: 000000042529e000 CR4: 00000000000406f0
> [    7.620842][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    7.620842][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [    7.620842][    T1] Call Trace:
> [    7.620842][    T1]  <TASK>
> [    7.620842][    T1]  ? __die_body+0x16/0x68
> [    7.620842][    T1]  ? die+0x34/0x58
> [    7.620842][    T1]  ? do_trap+0x111/0x1e8
> [    7.620842][    T1]  ? do_basic_setup+0x5b/0x90
> [    7.620842][    T1]  ? do_error_trap+0x11a/0x190
> [    7.620842][    T1]  ? do_basic_setup+0x5b/0x90
> [    7.620842][    T1]  ? handle_invalid_op+0x34/0x50
> [    7.620842][    T1]  ? do_basic_setup+0x5b/0x90
> [    7.620842][    T1]  ? exc_invalid_op+0x32/0x48
> [    7.620842][    T1]  ? asm_exc_invalid_op+0x16/0x20
> [    7.620842][    T1]  ? __cfi_asan.module_ctor+0x10/0x10
> [    7.620842][    T1]  ? do_basic_setup+0x5b/0x90
> [    7.620842][    T1]  kernel_init_freeable+0xf0/0x190
> [    7.620842][    T1]  ? __cfi_kernel_init+0x8/0x8
> [    7.620842][    T1]  kernel_init+0x19/0x198
> [    7.620842][    T1]  ? __cfi_kernel_init+0x8/0x8
> [    7.620842][    T1]  ret_from_fork+0x5a/0x88
> [    7.620842][    T1]  ? __cfi_kernel_init+0x8/0x8
> [    7.620842][    T1]  ret_from_fork_asm+0x11/0x20
> [    7.620842][    T1]  </TASK>
> [    7.620842][    T1] Modules linked in:
> [    7.620846][    T1] ---[ end trace 0000000000000000 ]---
> [    7.621487][    T1] RIP: 0010:do_basic_setup+0x5b/0x90
> [    7.622107][    T1] Code: 00 fc ff df 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 6d 85 50 fb 4d 8b 5e f8 41 ba a0 82 3b 1a 45 03 53 fc 74 02 <0f> 0b 41 ff d3 49 81 fe 68 10 7e be 73 0f e8 8a eb 12 fb 48 83 c3
> [    7.624206][    T1] RSP: 0000:ffffc9000001fed0 EFLAGS: 00010286
> [    7.624847][    T1] RAX: 1ffffffff7cfb6de RBX: ffffffffbe7db6f0 RCX: 0000000000000000
> [    7.625768][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [    7.626696][    T1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
> [    7.627602][    T1] R10: 00000000bf7be9ac R11: ffffffffbbdc9360 R12: ffffffffbd039fc0
> [    7.628513][    T1] R13: 0000000000000000 R14: ffffffffbe7db6f8 R15: dffffc0000000000
> [    7.629316][    T1] FS:  0000000000000000(0000) GS:ffffffffbd0dc000(0000) knlGS:0000000000000000
> [    7.630979][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    7.632216][    T1] CR2: ffff88843ffff000 CR3: 000000042529e000 CR4: 00000000000406f0
> [    7.633336][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    7.634842][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [    7.636376][    T1] Kernel panic - not syncing: Fatal exception
>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki

Hmm. This config has:

CONFIG_CLANG_VERSION=190102

Sami, is the fix not available as of llvm 19?


Alice