BUG: unable to handle kernel paging request in check_preempt_wakeup (2)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: b41dae06 Merge tag 'xfs-5.4-merge-7' of git://git.kernel.o..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11c6ec7e600000
kernel config: https://syzkaller.appspot.com/x/.config?x=dfcf592db22b9132
dashboard link: https://syzkaller.appspot.com/bug?extid=644702ab8c16c3e6cf3f
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
CC: [gre...@linuxfoundation.org linux-...@vger.kernel.org
tg...@linutronix.de net...@vger.kernel.org]

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

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+644702...@syzkaller.appspotmail.com

BUG: unable to handle page fault for address: fffffffe00000017
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8e70067 P4D 8e70067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:check_preempt_wakeup+0xaa/0x850 kernel/sched/fair.c:6677
Code: bd d8 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 18 48 89 f9 48
c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e 87 06 00 00 <41> 8b 47 18 be
08 00 00 00 4c 89 ef 48 89 55 d0 89 45 cc e8 4e 35
RSP: 0018:ffff8880a990f9c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880a98b8300 RCX: 1fffffffc0000002
RDX: ffff8880a98b8280 RSI: ffff8880a98b8280 RDI: fffffffe00000017
RBP: ffff8880a990fa00 R08: ffff8880ae836220 R09: 1ffffffff0f57bd1
R10: fffffbfff138cfd0 R11: ffffffff89c67e87 R12: ffff8880a98a62c0
R13: ffff8880a98a6240 R14: ffff8880ae835840 R15: fffffffdffffffff
FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffe00000017 CR3: 00000000a13a2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_preempt_curr+0x153/0x3a0 kernel/sched/core.c:1421
ttwu_do_wakeup+0x1f/0x580 kernel/sched/core.c:2219
ttwu_do_activate+0xe1/0x130 kernel/sched/core.c:2265
ttwu_queue kernel/sched/core.c:2409 [inline]
try_to_wake_up+0xb23/0x1a80 kernel/sched/core.c:2643
wake_up_process+0x10/0x20 kernel/sched/core.c:2667
swake_up_locked.part.0+0x5d/0x190 kernel/sched/swait.c:30
swake_up_locked kernel/sched/swait.c:26 [inline]
swake_up_one+0x42/0x60 kernel/sched/swait.c:40
rcu_gp_kthread_wake kernel/rcu/tree.c:1241 [inline]
rcu_gp_kthread_wake+0x6d/0xa0 kernel/rcu/tree.c:1232
rcu_report_qs_rsp+0x6d/0xa0 kernel/rcu/tree.c:1825
rcu_report_qs_rnp+0x2cd/0x400 kernel/rcu/tree.c:1896
rcu_report_qs_rdp kernel/rcu/tree.c:1982 [inline]
rcu_check_quiescent_state kernel/rcu/tree.c:2019 [inline]
rcu_core+0xe59/0x1560 kernel/rcu/tree.c:2361
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2386
__do_softirq+0x262/0x98c kernel/softirq.c:292
run_ksoftirqd kernel/softirq.c:603 [inline]
run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595
smpboot_thread_fn+0x6a3/0xa40 kernel/smpboot.c:165
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: fffffffe00000017
---[ end trace 1bdfb380ce19435e ]---
RIP: 0010:check_preempt_wakeup+0xaa/0x850 kernel/sched/fair.c:6677
Code: bd d8 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 18 48 89 f9 48
c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e 87 06 00 00 <41> 8b 47 18 be
08 00 00 00 4c 89 ef 48 89 55 d0 89 45 cc e8 4e 35
RSP: 0018:ffff8880a990f9c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880a98b8300 RCX: 1fffffffc0000002
RDX: ffff8880a98b8280 RSI: ffff8880a98b8280 RDI: fffffffe00000017
RBP: ffff8880a990fa00 R08: ffff8880ae836220 R09: 1ffffffff0f57bd1
R10: fffffbfff138cfd0 R11: ffffffff89c67e87 R12: ffff8880a98a62c0
R13: ffff8880a98a6240 R14: ffff8880ae835840 R15: fffffffdffffffff
FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffe00000017 CR3: 00000000a13a2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.