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Date:   Mon, 18 Sep 2023 22:11:43 +0800
From:   kernel test robot <oliver.sang@intel.com>
To:     Thomas =?iso-8859-1?Q?Wei=DFschuh?= <linux@weissschuh.net>
CC:     <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
        Sebastian Ott <sebott@redhat.com>, <linux-mm@kvack.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>,
        "Eric Biederman" <ebiederm@xmission.com>,
        Kees Cook <keescook@chromium.org>,
        "Mark Brown" <broonie@kernel.org>, Willy Tarreau <w@1wt.eu>,
        <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <stable@vger.kernel.org>,
        Thomas =?iso-8859-1?Q?Wei=DFschuh?= <linux@weissschuh.net>,
        <oliver.sang@intel.com>
Subject: Re: [PATCH RFC] binfmt_elf: fully allocate bss pages
Message-ID: <202309181644.1932ad53-oliver.sang@intel.com>
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Hello,

kernel test robot noticed "segfault_at_ip_sp_error" on:

commit: 13bd7a228b281e5cef2f51a236cafaa3400592a5 ("[PATCH RFC] binfmt_elf: fully allocate bss pages")
url: https://github.com/intel-lab-lkp/linux/commits/Thomas-Wei-schuh/binfmt_elf-fully-allocate-bss-pages/20230915-000102
patch link: https://lore.kernel.org/all/20230914-bss-alloc-v1-1-78de67d2c6dd@weissschuh.net/
patch subject: [PATCH RFC] binfmt_elf: fully allocate bss pages

in testcase: boot

compiler: gcc-12
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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202309181644.1932ad53-oliver.sang@intel.com


[   11.004901][    T1] ### dt-test ### EXPECT_NOT / : WARNING: <<all>>
[   11.005947][    T1] ### dt-test ### EXPECT_NOT / : ------------[ cut here ]------------
[   11.006784][    T1] ### dt-test ### pass of_unittest_lifecycle():3252
[   11.008735][    T1] ### dt-test ### pass of_unittest_lifecycle():3253
[   11.009666][    T1] ### dt-test ### pass of_unittest_check_tree_linkage():271
[   11.010598][    T1] ### dt-test ### pass of_unittest_check_tree_linkage():272
[   11.011531][    T1] ### dt-test ### FAIL of_unittest_overlay_high_level():3542 overlay_base_root not initialized
[   11.012852][    T1] ### dt-test ### end of unittest - 303 passed, 1 failed
[   11.022721][   T39] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[   11.042019][    T1] Sending DHCP requests ., OK
[   12.032757][    T1] IP-Config: Got DHCP answer from 10.0.2.2, my address is 10.0.2.15
[   12.033736][    T1] IP-Config: Complete:
[   12.034229][    T1]      device=eth0, hwaddr=52:54:00:12:34:56, ipaddr=10.0.2.15, mask=255.255.255.0, gw=10.0.2.2
[   12.035554][    T1]      host=vm-meta-36, domain=, nis-domain=(none)
[   12.036331][    T1]      bootserver=10.0.2.2, rootserver=10.0.2.2, rootpath=
[   12.036337][    T1]      nameserver0=10.0.2.3
[   12.038817][    T1] clk: Disabling unused clocks
[   12.041570][    T1] Freeing unused kernel image (initmem) memory: 1036K
[   12.059292][    T1] Write protecting kernel text and read-only data: 10632k
[   12.075444][    T1] Run /init as init process
[   12.075883][    T1]   with arguments:
[   12.076211][    T1]     /init
[   12.076481][    T1]   with environment:
[   12.076818][    T1]     HOME=/
[   12.077095][    T1]     TERM=linux
[   12.077397][    T1]     RESULT_ROOT=/result/boot/1/vm-snb/debian-11.1-i386-20220923.cgz/i386-randconfig-016-20230915/gcc-12/13bd7a228b281e5cef2f51a236cafaa3400592a5/5
[   12.078684][    T1]     BOOT_IMAGE=/pkg/linux/i386-randconfig-016-20230915/gcc-12/13bd7a228b281e5cef2f51a236cafaa3400592a5/vmlinuz-6.6.0-rc1-00073-g13bd7a228b28
[   12.079910][    T1]     branch=linux-review/Thomas-Wei-schuh/binfmt_elf-fully-allocate-bss-pages/20230915-000102
[   12.080775][    T1]     job=/lkp/jobs/scheduled/vm-meta-36/boot-1-debian-11.1-i386-20220923.cgz-i386-randconfig-016-20230915-13bd7a228b28-20230917-97632-11h3y6y-5.yaml
[   12.082051][    T1]     user=lkp
[   12.082345][    T1]     ARCH=i386
[   12.082639][    T1]     kconfig=i386-randconfig-016-20230915
[   12.083177][    T1]     commit=13bd7a228b281e5cef2f51a236cafaa3400592a5
[   12.083743][    T1]     max_uptime=600
[   12.084074][    T1]     LKP_SERVER=internal-lkp-server
[   12.084522][    T1]     selinux=0
[   12.084820][    T1]     softlockup_panic=1
[   12.085181][    T1]     prompt_ramdisk=0
[   12.085551][    T1]     vga=normal
[   12.117728][    T1] [1]: RTC configured in localtime, applying delta of 0 minutes to system time.

Welcome to Debian GNU/Linux 11 (bullseye)!

[   12.189049][   T58] process 58 ((sd-executor)) attempted a POSIX timer syscall while CONFIG_POSIX_TIMERS is not set
[   12.234253][   T63] systemd-getty-g[63]: segfault at 484771 ip 00480047 sp bffb6e4c error 7 in true[480000+1000] likely on CPU 0 (core 0, socket 0)
[ 12.242969][ T63] Code: 00 00 00 b8 82 00 00 00 00 00 00 34 00 20 00 0b 00 28 00 1e 00 1d 00 06 00 00 00 34 00 00 00 34 00 00 00 34 00 00 00 60 01 00 <00> 60 01 00 00 04 00 00 00 04 00 00 00 03 00 00 00 94 01 00 00 94
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 b8 82 00 00 00    	add    %bh,0x82(%rax)
   8:	00 00                	add    %al,(%rax)
   a:	00 34 00             	add    %dh,(%rax,%rax,1)
   d:	20 00                	and    %al,(%rax)
   f:	0b 00                	or     (%rax),%eax
  11:	28 00                	sub    %al,(%rax)
  13:	1e                   	(bad)  
  14:	00 1d 00 06 00 00    	add    %bl,0x600(%rip)        # 0x61a
  1a:	00 34 00             	add    %dh,(%rax,%rax,1)
  1d:	00 00                	add    %al,(%rax)
  1f:	34 00                	xor    $0x0,%al
  21:	00 00                	add    %al,(%rax)
  23:	34 00                	xor    $0x0,%al
  25:	00 00                	add    %al,(%rax)
  27:	60                   	(bad)  
  28:	01 00                	add    %eax,(%rax)
  2a:*	00 60 01             	add    %ah,0x1(%rax)		<-- trapping instruction
  2d:	00 00                	add    %al,(%rax)
  2f:	04 00                	add    $0x0,%al
  31:	00 00                	add    %al,(%rax)
  33:	04 00                	add    $0x0,%al
  35:	00 00                	add    %al,(%rax)
  37:	03 00                	add    (%rax),%eax
  39:	00 00                	add    %al,(%rax)
  3b:	94                   	xchg   %eax,%esp
  3c:	01 00                	add    %eax,(%rax)
  3e:	00                   	.byte 0x0
  3f:	94                   	xchg   %eax,%esp

Code starting with the faulting instruction
===========================================
   0:	00 60 01             	add    %ah,0x1(%rax)
   3:	00 00                	add    %al,(%rax)
   5:	04 00                	add    $0x0,%al
   7:	00 00                	add    %al,(%rax)
   9:	04 00                	add    $0x0,%al
   b:	00 00                	add    %al,(%rax)
   d:	03 00                	add    (%rax),%eax
   f:	00 00                	add    %al,(%rax)
  11:	94                   	xchg   %eax,%esp
  12:	01 00                	add    %eax,(%rax)
  14:	00                   	.byte 0x0
  15:	94                   	xchg   %eax,%esp
[   12.256651][   T62] systemd-fstab-g[62]: segfault at 0 ip 004a0004 sp bf81264b error 6 in systemd-fstab-generator[4a0000+2000] likely on CPU 0 (core 0, socket 0)
[ 12.257967][ T62] Code: Unable to access opcode bytes at 0x49ffda.

Code starting with the faulting instruction
===========================================
[   12.266578][   T60] systemd-cryptse[60]: segfault at 0 ip 00453004 sp bfeefa7b error 6 in systemd-cryptsetup-generator[453000+1000] likely on CPU 1 (core 1, socket 0)
[ 12.271885][ T60] Code: Unable to access opcode bytes at 0x452fda.

Code starting with the faulting instruction
===========================================
[   12.276875][   T61] systemd-debug-g[61]: segfault at fffff000 ip 00464004 sp bfd3675b error 7 in systemd-debug-generator[464000+1000] likely on CPU 1 (core 1, socket 0)
[ 12.278229][ T61] Code: Unable to access opcode bytes at 0x463fda.

Code starting with the faulting instruction
===========================================


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230918/202309181644.1932ad53-oliver.sang@intel.com


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