Subject: linux-next boot error: WARNING in prepare_kswapd_sleep

From: syzbot <[email-masked]>
Date: Mon, 23 Nov 2020 23:54:20 -0800

Hello,

syzbot found the following issue on:

HEAD commit:    d9137320 Add linux-next specific files for 20201124
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17b14079500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2ac6081150c8eac
dashboard link: https://syzkaller.appspot.com/bug?extid=ce635500093181f39c1c
compiler:       gcc (GCC) 10.1.0-syz 20200507

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

------------[ cut here ]------------
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 arch_static_branch arch/x86/include/asm/jump_label.h:25 [inline]
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 mem_cgroup_disabled include/linux/memcontrol.h:504 [inline]
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 mem_cgroup_lruvec include/linux/memcontrol.h:616 [inline]
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 clear_pgdat_congested mm/vmscan.c:3443 [inline]
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 prepare_kswapd_sleep mm/vmscan.c:3480 [inline]
WARNING: CPU: 1 PID: 2192 at include/linux/memcontrol.h:621 prepare_kswapd_sleep+0xed/0x250 mm/vmscan.c:3456
Modules linked in:
CPU: 1 PID: 2192 Comm: kswapd0 Not tainted 5.10.0-rc5-next-20201124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:621 [inline]
RIP: 0010:clear_pgdat_congested mm/vmscan.c:3443 [inline]
RIP: 0010:prepare_kswapd_sleep mm/vmscan.c:3480 [inline]
RIP: 0010:prepare_kswapd_sleep+0xed/0x250 mm/vmscan.c:3456
Code: 89 ee 48 89 df e8 73 d3 ff ff 31 ff 41 89 c4 89 c6 e8 87 19 d7 ff 45 84 e4 74 cc e8 6d 21 d7 ff 0f 1f 44 00 00 e8 63 21 d7 ff <0f> 0b 48 c7 c0 28 8d ee 8c 48 ba 00 00 00 00 00 fc ff df 48 c1 e8
RSP: 0000:ffffc900085bfda0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88813fffb000 RCX: ffffffff81998e19
RDX: ffff8880168c1ac0 RSI: ffffffff81998e2d RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000ab3 R09: 0000000000000f89
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000b08e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kswapd_try_to_sleep mm/vmscan.c:3784 [inline]
 kswapd+0x37d/0xdb0 mm/vmscan.c:3899
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 2192 Comm: kswapd0 Not tainted 5.10.0-rc5-next-20201124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 panic+0x306/0x73d kernel/panic.c:231
 __warn.cold+0x35/0x44 kernel/panic.c:605
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:259
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:578
RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:621 [inline]
RIP: 0010:clear_pgdat_congested mm/vmscan.c:3443 [inline]
RIP: 0010:prepare_kswapd_sleep mm/vmscan.c:3480 [inline]
RIP: 0010:prepare_kswapd_sleep+0xed/0x250 mm/vmscan.c:3456
Code: 89 ee 48 89 df e8 73 d3 ff ff 31 ff 41 89 c4 89 c6 e8 87 19 d7 ff 45 84 e4 74 cc e8 6d 21 d7 ff 0f 1f 44 00 00 e8 63 21 d7 ff <0f> 0b 48 c7 c0 28 8d ee 8c 48 ba 00 00 00 00 00 fc ff df 48 c1 e8
RSP: 0000:ffffc900085bfda0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88813fffb000 RCX: ffffffff81998e19
RDX: ffff8880168c1ac0 RSI: ffffffff81998e2d RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000ab3 R09: 0000000000000f89
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000003
 kswapd_try_to_sleep mm/vmscan.c:3784 [inline]
 kswapd+0x37d/0xdb0 mm/vmscan.c:3899
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Kernel Offset: disabled
Rebooting in 86400 seconds..

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