R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f2423e16038 R14: 00007f2423e15fa0 R15: 00007ffe913517d8
 </TASK>
------------[ cut here ]------------
anon_vma->num_active_vmas
WARNING: mm/rmap.c:528 at unlink_anon_vmas+0x6c5/0x730 mm/rmap.c:528, CPU#0: syz.9.3065/17678
Modules linked in:
CPU: 0 UID: 0 PID: 17678 Comm: syz.9.3065 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:unlink_anon_vmas+0x6c5/0x730 mm/rmap.c:528
Code: 08 00 48 3b 6c 24 18 74 29 e8 87 38 aa ff 49 89 ee e9 cf fd ff ff e8 7a 38 aa ff 90 0f 0b 90 e9 4d fe ff ff e8 6c 38 aa ff 90 <0f> 0b 90 e9 81 fe ff ff e8 5e 38 aa ff eb 05 e8 57 38 aa ff 48 83
RSP: 0018:ffffc90004b17648 EFLAGS: 00010293
RAX: ffffffff821c6a94 RBX: ffff8880771ae948 RCX: ffff88801e791e80
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: ffff88805d1b4170 R08: ffff8880771ae957 R09: 1ffff1100ee35d2a
R10: dffffc0000000000 R11: ffffed100ee35d2b R12: ffffffffffffffff
R13: 1ffff11004ec91c2 R14: ffff888027648e10 R15: ffff8880771ae948
FS:  0000000000000000(0000) GS:ffff888125436000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555594c80a28 CR3: 00000000470fc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 free_pgtables+0x836/0xb70 mm/memory.c:414
 exit_mmap+0x490/0xa10 mm/mmap.c:1314
 __mmput+0x118/0x430 kernel/fork.c:1180
 exit_mm+0x18e/0x250 kernel/exit.c:581
 do_exit+0x8b9/0x2490 kernel/exit.c:962
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1116
 get_signal+0x1284/0x1330 kernel/signal.c:3035
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2423b9c799
Code: Unable to access opcode bytes at 0x7f2423b9c76f.
RSP: 002b:00007f2424a3b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f2423e15fa8 RCX: 00007f2423b9c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f2423e15fac
RBP: 00007f2423e15fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2423e16038 R14: 00007ffe913516f0 R15: 00007ffe913517d8
 </TASK>