do_group_exit+0xd5/0x2a0 kernel/exit.c:1119
 get_signal+0x20ff/0x2210 kernel/signal.c:3037
 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x8b/0x4f0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x6f2/0xf80 arch/x86/entry/syscall_64.c:100
------------[ cut here ]------------
kernel BUG at ./include/linux/page-flags.h:345!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 20691 Comm: syz.2.3195 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:const_folio_flags include/linux/page-flags.h:345 [inline]
RIP: 0010:folio_test_idle include/linux/page-flags.h:667 [inline]
RIP: 0010:set_ps_flags+0x242/0x290 mm/util.c:1297
Code: 03 80 3c 02 00 0f 84 5f fe ff ff e8 28 19 24 00 e9 55 fe ff ff e8 de 4f b7 ff 48 c7 c6 c0 83 be 8b 48 89 df e8 af 78 05 00 90 <0f> 0b e8 d7 18 24 00 e9 ed fd ff ff e8 fd 18 24 00 e9 57 fe ff ff
RSP: 0018:ffffc900032178f8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea00025e92c0 RCX: ffffc90006233000
RDX: 0000000000080000 RSI: ffffffff82563428 RDI: ffff888035b384c4
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900032179d0
R13: 0000000000000001 R14: ffffea00025e8034 R15: dffffc0000000000
FS:  00007f0b021ee6c0(0000) GS:ffff888124374000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3250cff8 CR3: 0000000078e50000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 snapshot_page+0x463/0x560 mm/util.c:1333
 get_kpage_count+0x94/0x240 fs/proc/page.c:50
 kpage_read.isra.0+0x1b8/0x2b0 fs/proc/page.c:93
 pde_read fs/proc/inode.c:308 [inline]
 proc_reg_read+0x120/0x330 fs/proc/inode.c:318
 do_loop_readv_writev fs/read_write.c:849 [inline]
 do_loop_readv_writev fs/read_write.c:837 [inline]
 vfs_readv+0x5d8/0x8d0 fs/read_write.c:1022
 do_readv+0x13e/0x340 fs/read_write.c:1082
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b03f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0b021ee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f0b04215fa0 RCX: 00007f0b03f9ce59
RDX: 0000000100000007 RSI: 00002000000001c0 RDI: 0000000000000003
RBP: 00007f0b04032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b04216038 R14: 00007f0b04215fa0 R15: 00007ffd04bc4e58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:const_folio_flags include/linux/page-flags.h:345 [inline]
RIP: 0010:folio_test_idle include/linux/page-flags.h:667 [inline]
RIP: 0010:set_ps_flags+0x242/0x290 mm/util.c:1297
Code: 03 80 3c 02 00 0f 84 5f fe ff ff e8 28 19 24 00 e9 55 fe ff ff e8 de 4f b7 ff 48 c7 c6 c0 83 be 8b 48 89 df e8 af 78 05 00 90 <0f> 0b e8 d7 18 24 00 e9 ed fd ff ff e8 fd 18 24 00 e9 57 fe ff ff
RSP: 0018:ffffc900032178f8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea00025e92c0 RCX: ffffc90006233000
RDX: 0000000000080000 RSI: ffffffff82563428 RDI: ffff888035b384c4
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900032179d0
R13: 0000000000000001 R14: ffffea00025e8034 R15: dffffc0000000000
FS:  00007f0b021ee6c0(0000) GS:ffff888124374000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc30c1ec4b8 CR3: 0000000078e50000 CR4: 00000000003526f0