Hello,
kernel test robot noticed "WARNING:at_arch/x86/kernel/ftrace.c:#ftrace_verify_code" on:
commit: b1580354498f38290d1d5b94bd3f58562d6b8647 ("x86: Use PIE codegen for the core kernel")
git://git.kernel.org/cgit/linux/kernel/git/ardb/linux.git x86-pie
in testcase: boot
compiler: gcc-11
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, kindly add following tag
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-lkp/[email protected]
[ 0.004000][ T0] ------------[ cut here ]------------
[ 0.004000][ T0] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/ftrace.c:99 ftrace_verify_code (ftrace.c:?)
[ 0.004000][ T0] Modules linked in:
[ 0.004000][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 6.3.0-rc4-00016-gb1580354498f #1
[ 0.004000][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014
[ 0.004000][ T0] RIP: 0010:ftrace_verify_code (ftrace.c:?)
[ 0.004000][ T0] Code: 00 48 85 c0 74 09 0f 0b b8 f2 ff ff ff eb 22 ba 05 00 00 00 48 89 de 48 89 ef e8 61 63 a9 00 85 c0 74 0e 48 89 1d 66 27 fe 01 <0f> 0b b8 ea ff ff ff 48 8b 54 24 08 65 48 2b 15 a2 65 e7 01 74 05
All code
========
0: 00 48 85 add %cl,-0x7b(%rax)
3: c0 74 09 0f 0b shlb $0xb,0xf(%rcx,%rcx,1)
8: b8 f2 ff ff ff mov $0xfffffff2,%eax
d: eb 22 jmp 0x31
f: ba 05 00 00 00 mov $0x5,%edx
14: 48 89 de mov %rbx,%rsi
17: 48 89 ef mov %rbp,%rdi
1a: e8 61 63 a9 00 callq 0xa96380
1f: 85 c0 test %eax,%eax
21: 74 0e je 0x31
23: 48 89 1d 66 27 fe 01 mov %rbx,0x1fe2766(%rip) # 0x1fe2790
2a:* 0f 0b ud2 <-- trapping instruction
2c: b8 ea ff ff ff mov $0xffffffea,%eax
31: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
36: 65 48 2b 15 a2 65 e7 sub %gs:0x1e765a2(%rip),%rdx # 0x1e765e0
3d: 01
3e: 74 05 je 0x45
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: b8 ea ff ff ff mov $0xffffffea,%eax
7: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
c: 65 48 2b 15 a2 65 e7 sub %gs:0x1e765a2(%rip),%rdx # 0x1e765b6
13: 01
14: 74 05 je 0x1b
[ 0.004000][ T0] RSP: 0000:ffffffff82403e70 EFLAGS: 00010082
[ 0.004000][ T0] RAX: 00000000ffffff7f RBX: ffffffff82f0f228 RCX: 0000000000000001
[ 0.004000][ T0] RDX: 0000000000000005 RSI: ffffffff82f0f228 RDI: ffffffff82403e73
[ 0.004000][ T0] RBP: ffffffff82403e73 R08: 00000000000000e8 R09: ffffffff81001004
[ 0.004000][ T0] R10: 0000000000000001 R11: ffffffff82eec640 R12: 0000000000000000
[ 0.004000][ T0] R13: ffff88810c854000 R14: 0000000000000000 R15: ffffffff81046320
[ 0.004000][ T0] FS: 0000000000000000(0000) GS:ffff8884acd44000(0000) knlGS:0000000000000000
[ 0.004000][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.004000][ T0] CR2: ffff88843ffff000 CR3: 000000000241a000 CR4: 00000000000406b0
[ 0.004000][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.004000][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 0.004000][ T0] Call Trace:
[ 0.004000][ T0] <TASK>
[ 0.004000][ T0] ftrace_modify_code_direct (ftrace.c:?)
[ 0.004000][ T0] ? __traceiter_initcall_level (??:?)
[ 0.004000][ T0] ftrace_process_locs (ftrace.c:?)
[ 0.004000][ T0] ftrace_init (??:?)
[ 0.004000][ T0] start_kernel (??:?)
[ 0.004000][ T0] secondary_startup_64_no_verify (??:?)
[ 0.004000][ T0] </TASK>
[ 0.004000][ T0] ---[ end trace 0000000000000000 ]---
[ 0.004000][ T0] ------------[ ftrace bug ]------------
[ 0.004000][ T0] ftrace failed to modify
[ 0.004000][ T0] __traceiter_initcall_level (??:?)
[ 0.004000][ T0] actual: 67:e8:16:53:04
[ 0.004000][ T0] expected: e8:17:53:04:00
[ 0.004000][ T0] Initializing ftrace call sites
[ 0.004000][ T0] ftrace record flags: 0
[ 0.004000][ T0] (0)
[ 0.004000][ T0] expected tramp: ffffffff81046330
To reproduce:
# build kernel
cd linux
cp config-6.3.0-rc4-00016-gb1580354498f .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests