do_group_exit+0xd5/0x2a0 kernel/exit.c:1119
 __do_sys_exit_group kernel/exit.c:1130 [inline]
 __se_sys_exit_group kernel/exit.c:1128 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1128
 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232
 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
------------[ cut here ]------------
kernel BUG at ./include/linux/page-flags.h:351!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 809 Comm: syz.0.5445 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:const_folio_flags include/linux/page-flags.h:351 [inline]
RIP: 0010:folio_test_idle include/linux/page-flags.h:673 [inline]
RIP: 0010:set_ps_flags+0x321/0x390 mm/util.c:1219
Code: f6 0f 84 9e fe ff ff e8 6d 3b b8 ff 49 83 ed 01 e9 98 fe ff ff e8 5f 3b b8 ff 48 c7 c6 c0 75 be 8b 48 89 df e8 d0 80 05 00 90 <0f> 0b e8 d8 fd 24 00 e9 0e fd ff ff e8 fe fd 24 00 e9 78 fd ff ff
RSP: 0018:ffffc90003baf900 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea00014d7b40 RCX: ffffc90010a79000
RDX: 0000000000080000 RSI: ffffffff8255ab88 RDI: ffff8880324ba384
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003baf9d0
R13: 0000000000000000 R14: ffffea00014d7b74 R15: ffffc90003baf9d0
FS:  00007f2c8f0b76c0(0000) GS:ffff888124314000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43e5347e20 CR3: 0000000055014000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 snapshot_page+0x49a/0x660 mm/util.c:1255
 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: 0033:0x7f2c8e19c819
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:00007f2c8f0b7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f2c8e416090 RCX: 00007f2c8e19c819
RDX: 0000000100000007 RSI: 00002000000001c0 RDI: 0000000000000003
RBP: 00007f2c8e232c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c8e416128 R14: 00007f2c8e416090 R15: 00007ffe8b969488
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:const_folio_flags include/linux/page-flags.h:351 [inline]
RIP: 0010:folio_test_idle include/linux/page-flags.h:673 [inline]
RIP: 0010:set_ps_flags+0x321/0x390 mm/util.c:1219
Code: f6 0f 84 9e fe ff ff e8 6d 3b b8 ff 49 83 ed 01 e9 98 fe ff ff e8 5f 3b b8 ff 48 c7 c6 c0 75 be 8b 48 89 df e8 d0 80 05 00 90 <0f> 0b e8 d8 fd 24 00 e9 0e fd ff ff e8 fe fd 24 00 e9 78 fd ff ff
RSP: 0018:ffffc90003baf900 EFLAGS: 00010246
RAX: 0000000000080000 RBX: ffffea00014d7b40 RCX: ffffc90010a79000
RDX: 0000000000080000 RSI: ffffffff8255ab88 RDI: ffff8880324ba384
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003baf9d0
R13: 0000000000000000 R14: ffffea00014d7b74 R15: ffffc90003baf9d0
FS:  00007f2c8f0b76c0(0000) GS:ffff888124314000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562fafe15ee8 CR3: 0000000055014000 CR4: 00000000003526f0