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Date: Sun, 31 Jul 2022 14:26:08 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC: 0day robot <lkp@...el.com>, Mike Galbraith <efault@....de>,
LKML <linux-kernel@...r.kernel.org>, <lkp@...ts.01.org>,
"Jason A. Donenfeld" <Jason@...c4.com>,
Theodore Ts'o <tytso@....edu>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
John Ogness <john.ogness@...utronix.de>,
Petr Mladek <pmladek@...e.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [random] 9fdfe09a52:
BUG:sleeping_function_called_from_invalid_context_at_include/linux/percpu-rwsem.h
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 9fdfe09a520b124c2fbe21ae8a00d496605548c6 ("[PATCH] random: Initialize vsprintf's pointer hash once the random core is ready.")
url: https://github.com/intel-lab-lkp/linux/commits/Sebastian-Andrzej-Siewior/random-Initialize-vsprintf-s-pointer-hash-once-the-random-core-is-ready/20220729-165432
base: git://git.kernel.org/cgit/linux/kernel/git/crng/random.git master
patch link: https://lore.kernel.org/lkml/YuOf6qu453dOkR%2BS@linutronix.de
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>
[ 11.543105][ C1] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:49
[ 11.544701][ C1] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: systemd
[ 11.546025][ C1] preempt_count: 102, expected: 0
[ 11.546859][ C1] CPU: 1 PID: 1 Comm: systemd Not tainted 5.19.0-rc6-00367-g9fdfe09a520b #1
[ 11.548264][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 11.549867][ C1] Call Trace:
[ 11.550511][ C1] <IRQ>
[ 11.551123][ C1] dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
[ 11.551905][ C1] __might_resched.cold (kernel/sched/core.c:9822)
[ 11.552730][ C1] ? _credit_init_bits (drivers/char/random.c:1168)
[ 11.553591][ C1] cpus_read_lock (include/linux/percpu-rwsem.h:49 kernel/cpu.c:310)
[ 11.554371][ C1] static_key_enable (kernel/jump_label.c:190)
[ 11.555175][ C1] vsprintf_init_hash_pointer (include/linux/spinlock.h:404 lib/vsprintf.c:768)
[ 11.556094][ C1] crng_reseed (drivers/char/random.c:234)
[ 11.556920][ C1] _credit_init_bits (drivers/char/random.c:659)
[ 11.557755][ C1] entropy_timer (drivers/char/random.c:1173)
[ 11.558534][ C1] call_timer_fn (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:207 include/trace/events/timer.h:127 kernel/time/timer.c:1475)
[ 11.559294][ C1] __run_timers+0x1de/0x280
[ 11.560175][ C1] ? enqueue_hrtimer (kernel/time/hrtimer.c:1092)
[ 11.561005][ C1] ? __hrtimer_run_queues (include/linux/seqlock.h:612 kernel/time/hrtimer.c:1711 kernel/time/hrtimer.c:1749)
[ 11.561842][ C1] run_timer_softirq (kernel/time/timer.c:1805)
[ 11.562629][ C1] __do_softirq (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:207 include/trace/events/irq.h:142 kernel/softirq.c:572)
[ 11.563373][ C1] __irq_exit_rcu (kernel/softirq.c:445 kernel/softirq.c:650)
[ 11.564214][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1106 (discriminator 14))
[ 11.565102][ C1] </IRQ>
[ 11.565622][ C1] <TASK>
[ 11.566195][ C1] asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:649)
[ 11.567139][ C1] RIP: 0010:__schedule (kernel/sched/core.c:6466)
[ 11.567979][ C1] Code: 83 e0 fc 41 89 84 24 98 09 00 00 83 f8 02 76 07 c7 45 c8 04 00 00 00 4c 89 ef 4c 89 fe e8 b9 93 2b ff 48 89 c7 e8 91 f3 3c ff <48> 8b 45 d0 65 48 2b 04 25 28 00 00 00 0f 85 de 03 00 00 48 83 c4
All code
========
0: 83 e0 fc and $0xfffffffc,%eax
3: 41 89 84 24 98 09 00 mov %eax,0x998(%r12)
a: 00
b: 83 f8 02 cmp $0x2,%eax
e: 76 07 jbe 0x17
10: c7 45 c8 04 00 00 00 movl $0x4,-0x38(%rbp)
17: 4c 89 ef mov %r13,%rdi
1a: 4c 89 fe mov %r15,%rsi
1d: e8 b9 93 2b ff callq 0xffffffffff2b93db
22: 48 89 c7 mov %rax,%rdi
25: e8 91 f3 3c ff callq 0xffffffffff3cf3bb
2a:* 48 8b 45 d0 mov -0x30(%rbp),%rax <-- trapping instruction
2e: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax
35: 00 00
37: 0f 85 de 03 00 00 jne 0x41b
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c4 .byte 0xc4
Code starting with the faulting instruction
===========================================
0: 48 8b 45 d0 mov -0x30(%rbp),%rax
4: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax
b: 00 00
d: 0f 85 de 03 00 00 jne 0x3f1
13: 48 rex.W
14: 83 .byte 0x83
15: c4 .byte 0xc4
[ 11.570841][ C1] RSP: 0018:ffffb80c40013d68 EFLAGS: 00000282
[ 11.571833][ C1] RAX: 0000000000000004 RBX: 0000000000000000 RCX: ffff90c06fd2bf68
[ 11.573143][ C1] RDX: ffff90c06fd2bf68 RSI: ffff90c06fd2bf68 RDI: ffff90c06fd2b500
[ 11.574494][ C1] RBP: ffffb80c40013db8 R08: ffff90c06fd2bf68 R09: ffff90c06fd2bf68
[ 11.575843][ C1] R10: 0000000072fba847 R11: 000000006fc6435a R12: ffff90c06fd2b500
[ 11.577197][ C1] R13: ffff90bd40290000 R14: 0000000000000000 R15: ffff90bd40290000
[ 11.578536][ C1] ? __schedule (kernel/sched/core.c:5768 kernel/sched/core.c:6277 kernel/sched/core.c:6422)
[ 11.579300][ C1] schedule (arch/x86/include/asm/preempt.h:85 (discriminator 1) kernel/sched/core.c:6531 (discriminator 1))
[ 11.580036][ C1] try_to_generate_entropy (arch/x86/include/asm/msr.h:184 arch/x86/include/asm/timex.h:13 drivers/char/random.c:1205)
[ 11.580892][ C1] ? _credit_init_bits (drivers/char/random.c:1168)
[ 11.581684][ C1] urandom_read_iter.cold (drivers/char/random.c:1320)
[ 11.582508][ C1] new_sync_read (fs/read_write.c:402 (discriminator 1))
[ 11.583271][ C1] vfs_read (fs/read_write.c:482)
[ 11.583990][ C1] ksys_read (fs/read_write.c:620)
[ 11.584686][ C1] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[ 11.585426][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
[ 11.586408][ C1] RIP: 0033:0x7f1512769e8e
[ 11.587210][ C1] Code: c0 e9 b6 fe ff ff 50 48 8d 3d 6e 18 0a 00 e8 89 e8 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
All code
========
0: c0 e9 b6 shr $0xb6,%cl
3: fe (bad)
4: ff (bad)
5: ff 50 48 callq *0x48(%rax)
8: 8d 3d 6e 18 0a 00 lea 0xa186e(%rip),%edi # 0xa187c
e: e8 89 e8 01 00 callq 0x1e89c
13: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
1a: 00 00
1c: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax
23: 00
24: 85 c0 test %eax,%eax
26: 75 14 jne 0x3c
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 77 5a ja 0x8c
32: c3 retq
33: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
3a: 00 00
3c: 48 83 ec 28 sub $0x28,%rsp
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 5a ja 0x62
8: c3 retq
9: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
10: 00 00
12: 48 83 ec 28 sub $0x28,%rsp
[ 11.590175][ C1] RSP: 002b:00007ffea4616248 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 11.591590][ C1] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007f1512769e8e
[ 11.592936][ C1] RDX: 0000000000000010 RSI: 00007ffea46162e0 RDI: 000000000000000c
[ 11.594246][ C1] RBP: 000000000000000c R08: 0000000000000000 R09: 0000000000000001
[ 11.595573][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 11.596914][ C1] R13: 0000000000000001 R14: 00007ffea46162e0 R15: 0000000000000000
[ 11.598246][ C1] </TASK>
To reproduce:
# build kernel
cd linux
cp config-5.19.0-rc6-00367-g9fdfe09a520b .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://01.org/lkp
View attachment "config-5.19.0-rc6-00367-g9fdfe09a520b" of type "text/plain" (164082 bytes)
View attachment "job-script" of type "text/plain" (4823 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (15368 bytes)
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