linux-kernel - BUG: using __this_cpu_read() in preemptible code in trace_hardirqs

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Message-ID: <000000000000e921b305b18ba0a7@google.com>
Date:   Tue, 13 Oct 2020 04:22:21 -0700
From:   syzbot <syzbot+53f8ce8bbc07924b6417@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, mingo@...hat.com,
        rostedt@...dmis.org, syzkaller-bugs@...glegroups.com
Subject: BUG: using __this_cpu_read() in preemptible code in trace_hardirqs_on

Hello,

syzbot found the following issue on:

HEAD commit:    865c50e1 x86/uaccess: utilize CONFIG_CC_HAS_ASM_GOTO_OUTPUT
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15112ef0500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c829313274207568
dashboard link: https://syzkaller.appspot.com/bug?extid=53f8ce8bbc07924b6417
compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+53f8ce8bbc07924b6417@...kaller.appspotmail.com

BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor.0/8265
caller is lockdep_hardirqs_on_prepare+0x56/0x620 kernel/locking/lockdep.c:4060
CPU: 0 PID: 8265 Comm: syz-executor.0 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 check_preemption_disabled+0x13c/0x140 lib/smp_processor_id.c:48
 lockdep_hardirqs_on_prepare+0x56/0x620 kernel/locking/lockdep.c:4060
 trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49
 __bad_area_nosemaphore+0x89/0x510 arch/x86/mm/fault.c:797
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x129/0x240 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538
RIP: 0033:0x402d28
Code: 00 00 48 89 7c 24 f8 48 89 74 24 f0 48 89 54 24 e8 48 89 4c 24 e0 48 8b 74 24 f8 4c 8b 4c 24 f0 48 8b 4c 24 e8 48 8b 54 24 e0 <8b> 86 0c 01 00 00 44 8b 86 08 01 00 00 c1 e0 04 8d b8 7f 01 00 00
RSP: 002b:00007fce5827ec68 EFLAGS: 00010216
RAX: 0000000000402d00 RBX: 000000000118bfc8 RCX: 0000000020000200
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000118c010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffea2de495f R14: 00007fce5827f9c0 R15: 000000000118bfd4
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor.0/8265
caller is lockdep_hardirqs_on+0x36/0x110 kernel/locking/lockdep.c:4129
CPU: 0 PID: 8265 Comm: syz-executor.0 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 check_preemption_disabled+0x13c/0x140 lib/smp_processor_id.c:48
 lockdep_hardirqs_on+0x36/0x110 kernel/locking/lockdep.c:4129
 __bad_area_nosemaphore+0x89/0x510 arch/x86/mm/fault.c:797
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x129/0x240 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538
RIP: 0033:0x402d28
Code: 00 00 48 89 7c 24 f8 48 89 74 24 f0 48 89 54 24 e8 48 89 4c 24 e0 48 8b 74 24 f8 4c 8b 4c 24 f0 48 8b 4c 24 e8 48 8b 54 24 e0 <8b> 86 0c 01 00 00 44 8b 86 08 01 00 00 c1 e0 04 8d b8 7f 01 00 00
RSP: 002b:00007fce5827ec68 EFLAGS: 00010216
RAX: 0000000000402d00 RBX: 000000000118bfc8 RCX: 0000000020000200
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000118c010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffea2de495f R14: 00007fce5827f9c0 R15: 000000000118bfd4


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