RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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.0.2923/15965
Modules linked in:
CPU: 0 UID: 0 PID: 15965 Comm: syz.0.2923 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 e7 22 aa ff 49 89 ee e9 cf fd ff ff e8 da 22 aa ff 90 0f 0b 90 e9 4d fe ff ff e8 cc 22 aa ff 90 <0f> 0b 90 e9 81 fe ff ff e8 be 22 aa ff eb 05 e8 b7 22 aa ff 48 83
RSP: 0000:ffffc9000e76f608 EFLAGS: 00010293
RAX: ffffffff821b7ae4 RBX: ffff888062a0f000 RCX: ffff88805b1d9e80
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: ffff88807cf32cb0 R08: ffff888062a0f00f R09: 1ffff1100c541e01
R10: dffffc0000000000 R11: ffffed100c541e02 R12: ffffffffffffffff
R13: 1ffff11008412210 R14: ffff888042091080 R15: ffff888062a0f000
FS:  0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f53b3ff4 CR3: 00000000361ac000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 free_pgtables+0x836/0xb70 mm/memory.c:427
 exit_mmap+0x490/0xa10 mm/mmap.c:1314
 __mmput+0x118/0x430 kernel/fork.c:1174
 exit_mm+0x168/0x220 kernel/exit.c:581
 do_exit+0x6a2/0x23c0 kernel/exit.c:964
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 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:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 __do_fast_syscall_32+0x415/0x640 arch/x86/entry/syscall_32.c:310
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70aef6c
Code: Unable to access opcode bytes at 0xf70aef42.
RSP: 002b:00000000f549d5cc EFLAGS: 00000206 ORIG_RAX: 00000000000000f0
RAX: 0000000000000001 RBX: 00000000f74a4f8c RCX: 0000000000000081
RDX: 00000000000f4240 RSI: 0000000020646165 RDI: 0000000063617473
RBP: 0000000000203a6b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>