Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: c10e9d3441ddee43a36482980f1e39efbd5169e2 ("[PATCH v2 3/6] mm/mremap: Use pmd/pud_poplulate to update page table entries")
url: https://github.com/0day-ci/linux/commits/Aneesh-Kumar-K-V/Speedup-mremap-on-ppc64/20210315-194324
base: https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git next
in testcase: ltp
version: ltp-x86_64-14c1f76-1_20210318
with following parameters:
test: cve
ucode: 0xe2
test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features.
test-url: http://linux-test-project.github.io/
on test machine: 8 threads Intel(R) Core(TM) i7-6770HQ CPU @ 2.60GHz with 32G memory
caused below changes (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]>
[ 98.252964] INFO: creating /lkp/benchmarks/ltp/output directory
[ 98.252970]
[ 98.267491] INFO: creating /lkp/benchmarks/ltp/results directory
[ 98.267497]
[ 98.281384] Checking for required user/group ids
[ 98.281391]
[ 98.291431]
[ 98.291435]
[ 98.300185] 'nobody' user id and group found.
[ 98.300191]
[ 98.311932] 'bin' user id and group found.
[ 98.311939]
[ 98.323511] 'daemon' user id and group found.
[ 98.323518]
[ 98.335042] Users group found.
[ 98.335048]
[ 98.344952] Sys group found.
[ 98.344959]
[ 98.355096] Required users/groups exist.
[ 98.355102]
[ 98.368977] If some fields are empty or look unusual you may have an old version.
[ 98.368985]
[ 98.386687] Compare to the current minimal requirements in Documentation/Changes.
[ 98.386695]
[ 98.400203]
[ 98.400208]
[ 98.408018] /etc/os-release
[ 98.408024]
[ 98.417964] PRETTY_NAME="Debian GNU/Linux 10 (buster)"
[ 98.417970]
[ 98.429645] NAME="Debian GNU/Linux"
[ 98.429651]
[ 98.439140] VERSION_ID="10"
[ 98.439146]
[ 98.448259] VERSION="10 (buster)"
[ 98.448264]
[ 98.457722] VERSION_CODENAME=buster
[ 98.457727]
[ 98.466720] ID=debian
[ 98.466724]
[ 98.475508] HOME_URL="https://www.debian.org/"
[ 98.475513]
[ 98.486989] SUPPORT_URL="https://www.debian.org/support"
[ 98.486994]
[ 98.499083] BUG_REPORT_URL="https://bugs.debian.org/"
[ 98.499088]
[ 98.508857]
[ 98.508861]
[ 98.515024] uname:
[ 98.515029]
[ 98.526128] Linux lkp-skl-nuc2 5.12.0-rc2-00014-gc10e9d3441dd #1 SMP Thu Mar 18 13:26:11 CST 2021 x86_64 GNU/Linux
[ 98.526134]
[ 98.541084]
[ 98.541088]
[ 98.547140] /proc/cmdline
[ 98.547145]
[ 110.939655] ip=::::lkp-skl-nuc2::dhcp root=/dev/ram0 user=lkp job=/lkp/jobs/scheduled/lkp-skl-nuc2/ltp-cve-ucode=0xe2-debian-10.4-x86_64-20200603.cgz-c10e9d3441ddee43a36482980f1e39efbd5169e2-20210319-46118-1o3779n-5.yaml ARCH=x86_64 kconfig=x86_64-rhel-8.3 branch=linux-review/Aneesh-Kumar-K-V/Speedup-mremap-on-ppc64/20210315-194324 commit=c10e9d3441ddee43a36482980f1e39efbd5169e2 BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/c10e9d3441ddee43a36482980f1e39efbd5169e2/vmlinuz-5.12.0-rc2-00014-gc10e9d3441dd max_uptime=2100 RESULT_ROOT=/result/ltp/cve-ucode=0xe2/lkp-skl-nuc2/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/c10e9d3441ddee43a36482980f1e39efbd5169e2/1 LKP_SERVER=internal-lkp-server nokaslr selinux=0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk
[ 110.939673]
[ 111.035045]
[ 111.035051]
[ 111.428862] true: Corrupted page table at address 7ffce3c00000
[ 111.436435] PGD 80000008bb481067 P4D 80000008bb481067 PUD 8b23e0067 PMD ffe7a22cdb3c0067
[ 111.436442] BAD
[ 111.449812] Bad pagetable: 0009 [#1] SMP PTI
[ 111.455735] CPU: 2 PID: 3350 Comm: true Tainted: G I 5.12.0-rc2-00014-gc10e9d3441dd #1
[ 111.466839] Hardware name: /NUC6i7KYB, BIOS KYSKLi70.86A.0041.2016.0817.1130 08/17/2016
[ 111.476757] RIP: 0010:strnlen_user (kbuild/src/consumer/lib/strnlen_user.c:52 kbuild/src/consumer/lib/strnlen_user.c:113)
[ 111.483021] Code: 80 80 4c 09 da 45 31 db 48 8d 0c 1a 48 f7 d2 48 21 ca 4c 21 c2 75 2e 48 89 c1 49 8d 6a 08 4c 29 d1 48 83 f9 08 76 62 44 89 d9 <4a> 8b 54 17 08 85 c9 75 4b 48 8d 0c 1a 48 f7 d2 49 89 ea 48 21 ca
All code
========
0: 80 80 4c 09 da 45 31 addb $0x31,0x45da094c(%rax)
7: db 48 8d fisttpl -0x73(%rax)
a: 0c 1a or $0x1a,%al
c: 48 f7 d2 not %rdx
f: 48 21 ca and %rcx,%rdx
12: 4c 21 c2 and %r8,%rdx
15: 75 2e jne 0x45
17: 48 89 c1 mov %rax,%rcx
1a: 49 8d 6a 08 lea 0x8(%r10),%rbp
1e: 4c 29 d1 sub %r10,%rcx
21: 48 83 f9 08 cmp $0x8,%rcx
25: 76 62 jbe 0x89
27: 44 89 d9 mov %r11d,%ecx
2a:* 4a 8b 54 17 08 mov 0x8(%rdi,%r10,1),%rdx <-- trapping instruction
2f: 85 c9 test %ecx,%ecx
31: 75 4b jne 0x7e
33: 48 8d 0c 1a lea (%rdx,%rbx,1),%rcx
37: 48 f7 d2 not %rdx
3a: 49 89 ea mov %rbp,%r10
3d: 48 21 ca and %rcx,%rdx
Code starting with the faulting instruction
===========================================
0: 4a 8b 54 17 08 mov 0x8(%rdi,%r10,1),%rdx
5: 85 c9 test %ecx,%ecx
7: 75 4b jne 0x54
9: 48 8d 0c 1a lea (%rdx,%rbx,1),%rcx
d: 48 f7 d2 not %rdx
10: 49 89 ea mov %rbp,%r10
13: 48 21 ca and %rcx,%rdx
[ 111.505997] RSP: 0018:ffffc90002ecfcb8 EFLAGS: 00050202
[ 111.513206] RAX: 0000000000020002 RBX: fefefefefefefeff RCX: 0000000000000000
[ 111.522461] RDX: 0000000000000000 RSI: 0000000000020000 RDI: 00007ffce3bffaf0
[ 111.531682] RBP: 0000000000000510 R08: 8080808080808080 R09: 0000000000000002
[ 111.540826] R10: 0000000000000508 R11: 0000000000000000 R12: 00007ffce3a00d08
[ 111.550065] R13: 00007ffce3bffaf2 R14: ffff8888bca2a200 R15: 00000000000005fc
[ 111.559310] FS: 0000000000000000(0000) GS:ffff8888bec80000(0000) knlGS:0000000000000000
[ 111.569563] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 111.577436] CR2: 00007ffce3c00000 CR3: 00000008b2770001 CR4: 00000000003706e0
[ 111.586711] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 111.596002] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 111.605227] Call Trace:
[ 111.609613] create_elf_tables (kbuild/src/consumer/fs/binfmt_elf.c:331)
[ 111.616334] load_elf_binary (kbuild/src/consumer/fs/binfmt_elf.c:1257)
[ 111.622317] exec_binprm (kbuild/src/consumer/fs/exec.c:1722 kbuild/src/consumer/fs/exec.c:1761)
[ 111.627934] bprm_execve (kbuild/src/consumer/fs/exec.c:1831 kbuild/src/consumer/fs/exec.c:1792)
[ 111.633548] do_execveat_common+0x18f/0x1c0
[ 111.640406] __x64_sys_execve (kbuild/src/consumer/fs/exec.c:2058)
[ 111.646280] do_syscall_64 (kbuild/src/consumer/arch/x86/entry/common.c:46)
[ 111.651934] entry_SYSCALL_64_after_hwframe (kbuild/src/consumer/arch/x86/entry/entry_64.S:112)
[ 111.659119] RIP: 0033:0x7f58cf452a07
[ 111.664728] Code: Unable to access opcode bytes at RIP 0x7f58cf4529dd.
Code starting with the faulting instruction
===========================================
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml
bin/lkp run compatible-job.yaml
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation
Thanks,
Oliver Sang