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Message-ID: <ZKIsoMOT71uwCIZX@xsang-OptiPlex-9020>
Date:   Mon, 3 Jul 2023 10:04:16 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     "Liam R. Howlett" <Liam.Howlett@...cle.com>
CC:     Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, <lkp@...ts.01.org>,
        <lkp@...el.com>, <oliver.sang@...el.com>
Subject: [mm]  408579cd62: WARNING:suspicious_RCU_usage



Greeting,

FYI, we noticed the following commit (built with clang-15):

commit: 408579cd627a15bd703fe3eeb8485fd02726e9d3 ("mm: Update do_vmi_align_munmap() return semantics")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: boot

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

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 <oliver.sang@...el.com>


[  215.088258][    T1] WARNING: suspicious RCU usage
[  215.089042][    T1] 6.4.0-09907-g408579cd627a #1 Not tainted
[  215.090018][    T1] -----------------------------
[  215.090877][    T1] lib/maple_tree.c:860 suspicious rcu_dereference_check() usage!
[  215.092160][    T1]
[  215.092160][    T1] other info that might help us debug this:
[  215.092160][    T1]
[  215.093936][    T1]
[  215.093936][    T1] rcu_scheduler_active = 2, debug_locks = 1
[  215.095232][    T1] no locks held by init/1.
[  215.095989][    T1]
[  215.095989][    T1] stack backtrace:
[  215.097067][    T1] CPU: 0 PID: 1 Comm: init Not tainted 6.4.0-09907-g408579cd627a #1
[  215.098372][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  215.099963][    T1] Call Trace:
[  215.100474][    T1]  <TASK>
[ 215.101027][ T1] dump_stack_lvl (lib/dump_stack.c:107) 
[ 215.101807][ T1] lockdep_rcu_suspicious (include/linux/context_tracking.h:122) 
[ 215.102688][ T1] mas_start (lib/maple_tree.c:?) 
[ 215.103355][ T1] mas_find (lib/maple_tree.c:3861 lib/maple_tree.c:4980 lib/maple_tree.c:5924 lib/maple_tree.c:5965) 
[ 215.104024][ T1] validate_mm (mm/mmap.c:301) 
[ 215.104777][ T1] do_vmi_align_munmap (mm/mmap.c:?) 
[ 215.105691][ T1] do_vmi_munmap (mm/mmap.c:2619) 
[ 215.106384][ T1] __vm_munmap (mm/mmap.c:2899) 
[ 215.107145][ T1] __x64_sys_munmap (mm/mmap.c:2916 mm/mmap.c:2913 mm/mmap.c:2913) 
[ 215.107962][ T1] do_syscall_64 (arch/x86/entry/common.c:?) 
[ 215.108784][ T1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) 
[  215.109733][    T1] RIP: 0033:0x7f5ef4577e07
[ 215.110443][ T1] Code: 0f 1f 00 f7 d8 89 05 60 03 01 00 48 c7 c0 ff ff ff ff eb 99 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 31 03 01 00 f7 d8 89 01 48 83
All code
========
   0:	0f 1f 00             	nopl   (%rax)
   3:	f7 d8                	neg    %eax
   5:	89 05 60 03 01 00    	mov    %eax,0x10360(%rip)        # 0x1036b
   b:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  12:	eb 99                	jmp    0xffffffffffffffad
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  23:	b8 0b 00 00 00       	mov    $0xb,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8d 0d 31 03 01 00 	lea    0x10331(%rip),%rcx        # 0x1036b
  3a:	f7 d8                	neg    %eax
  3c:	89 01                	mov    %eax,(%rcx)
  3e:	48                   	rex.W
  3f:	83                   	.byte 0x83

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8d 0d 31 03 01 00 	lea    0x10331(%rip),%rcx        # 0x10341
  10:	f7 d8                	neg    %eax
  12:	89 01                	mov    %eax,(%rcx)
  14:	48                   	rex.W
  15:	83                   	.byte 0x83
[  215.113442][    T1] RSP: 002b:00007fff4bee7608 EFLAGS: 00000202 ORIG_RAX: 000000000000000b
[  215.114734][    T1] RAX: ffffffffffffffda RBX: 0000008d3439883d RCX: 00007f5ef4577e07
[  215.115953][    T1] RDX: 0000008d00000000 RSI: 00000000000065e0 RDI: 00007f5ef42bf000
[  215.117299][    T1] RBP: 00007fff4bee78b0 R08: 0000000000000000 R09: 00007f5ef3fd6738
[  215.118541][    T1] R10: 00007f5ef4586f78 R11: 0000000000000202 R12: 0000008d2ecd462d
[  215.119813][    T1] R13: 00007f5ef4588180 R14: 00007f5ef4588180 R15: 00007f5ef38ef900
[  215.121130][    T1]  </TASK>
[  215.121750][    T1]
[  215.122149][    T1] =============================
[  215.122955][    T1] WARNING: suspicious RCU usage
[  215.123772][    T1] 6.4.0-09907-g408579cd627a #1 Not tainted
[  215.124752][    T1] -----------------------------
[  215.125549][    T1] lib/maple_tree.c:816 suspicious rcu_dereference_check() usage!
[  215.126747][    T1]
[  215.126747][    T1] other info that might help us debug this:
[  215.126747][    T1]
[  215.128401][    T1]
[  215.128401][    T1] rcu_scheduler_active = 2, debug_locks = 1
[  215.129720][    T1] no locks held by init/1.
[  215.130417][    T1]
[  215.130417][    T1] stack backtrace:
[  215.131392][    T1] CPU: 0 PID: 1 Comm: init Not tainted 6.4.0-09907-g408579cd627a #1
[  215.132633][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  215.134353][    T1] Call Trace:
[  215.134896][    T1]  <TASK>
[ 215.135380][ T1] dump_stack_lvl (lib/dump_stack.c:107) 
[ 215.136130][ T1] lockdep_rcu_suspicious (include/linux/context_tracking.h:122) 
[ 215.137047][ T1] mtree_range_walk (lib/maple_tree.c:?) 
[ 215.137865][ T1] mas_find (lib/maple_tree.c:3868 lib/maple_tree.c:4980 lib/maple_tree.c:5924 lib/maple_tree.c:5965) 
[ 215.138570][ T1] validate_mm (mm/mmap.c:301) 
[ 215.139322][ T1] do_vmi_align_munmap (mm/mmap.c:?) 
[ 215.140203][ T1] do_vmi_munmap (mm/mmap.c:2619) 
[ 215.140985][ T1] __vm_munmap (mm/mmap.c:2899) 
[ 215.141721][ T1] __x64_sys_munmap (mm/mmap.c:2916 mm/mmap.c:2913 mm/mmap.c:2913) 
[ 215.142511][ T1] do_syscall_64 (arch/x86/entry/common.c:?) 
[ 215.143276][ T1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) 
[  215.144276][    T1] RIP: 0033:0x7f5ef4577e07
[ 215.144998][ T1] Code: 0f 1f 00 f7 d8 89 05 60 03 01 00 48 c7 c0 ff ff ff ff eb 99 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 31 03 01 00 f7 d8 89 01 48 83
All code
========
   0:	0f 1f 00             	nopl   (%rax)
   3:	f7 d8                	neg    %eax
   5:	89 05 60 03 01 00    	mov    %eax,0x10360(%rip)        # 0x1036b
   b:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  12:	eb 99                	jmp    0xffffffffffffffad
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  23:	b8 0b 00 00 00       	mov    $0xb,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8d 0d 31 03 01 00 	lea    0x10331(%rip),%rcx        # 0x1036b
  3a:	f7 d8                	neg    %eax
  3c:	89 01                	mov    %eax,(%rcx)
  3e:	48                   	rex.W
  3f:	83                   	.byte 0x83

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8d 0d 31 03 01 00 	lea    0x10331(%rip),%rcx        # 0x10341
  10:	f7 d8                	neg    %eax
  12:	89 01                	mov    %eax,(%rcx)
  14:	48                   	rex.W
  15:	83                   	.byte 0x83
[  215.148009][    T1] RSP: 002b:00007fff4bee7608 EFLAGS: 00000202 ORIG_RAX: 000000000000000b
[  215.149494][    T1] RAX: ffffffffffffffda RBX: 0000008d3439883d RCX: 00007f5ef4577e07
[  215.150834][    T1] RDX: 0000008d00000000 RSI: 00000000000065e0 RDI: 00007f5ef42bf000
[  215.152031][    T1] RBP: 00007fff4bee78b0 R08: 0000000000000000 R09: 00007f5ef3fd6738
[  215.153251][    T1] R10: 00007f5ef4586f78 R11: 0000000000000202 R12: 0000008d2ecd462d
[  215.154510][    T1] R13: 00007f5ef4588180 R14: 00007f5ef4588180 R15: 00007f5ef38ef900
[  215.155756][    T1]  </TASK>
[  215.182678][    T1] systemd[1]: RTC configured in localtime, applying delta of 0 minutes to system time.

Welcome to Debian GNU/Linux 11 (bullseye)!

[  215.449392][   T79] process 79 ((sd-executor)) attempted a POSIX timer syscall while CONFIG_POSIX_TIMERS is not set
[  215.758912][   T84] systemd-getty-g (84) used greatest stack depth: 26896 bytes left
[  215.948756][   T80] systemd-bless-b (80) used greatest stack depth: 26864 bytes left
[  218.217378][    C1] random: crng init done



To reproduce:

        # build kernel
	cd linux
	cp config-6.4.0-09907-g408579cd627a .config
	make HOSTCC=clang-15 CC=clang-15 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=clang-15 CC=clang-15 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://01.org/lkp



View attachment "config-6.4.0-09907-g408579cd627a" of type "text/plain" (128204 bytes)

View attachment "job-script" of type "text/plain" (5026 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (14268 bytes)

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