------------[ cut here ]------------
WARNING: CPU: 0 PID: 3813 at mm/mmap.c:1096 vma_merge+0x32a/0x870 mm/mmap.c:1096
Modules linked in:
CPU: 0 PID: 3813 Comm: syz-executor.0 Not tainted 5.19.0-rc2-next-20220615-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vma_merge+0x32a/0x870 mm/mmap.c:1096
Code: c4 ff 4c 89 ee 4c 89 e7 e8 c3 4b c4 ff 4d 39 ec 0f 86 13 04 00 00 e8 c5 4f c4 ff e8 c0 4f c4 ff 45 31 e4 eb a1 e8 b6 4f c4 ff <0f> 0b e9 49 fe ff ff e8 aa 4f c4 ff 48 8d bd 88 00 00 00 48 b8 00
RSP: 0018:ffffc900036ffc98 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802248bca8 RCX: 0000000000000000
RDX: ffff8880213557c0 RSI: ffffffff81b6739a RDI: 0000000000000006
RBP: ffff888079b4e510 R08: 0000000000000006 R09: 000000002041e000
R10: 0000000020718000 R11: 0000000000000001 R12: 0000000020718000
R13: 000000002041e000 R14: ffff88802248bca8 R15: 000000002041e000
FS:  0000555556615400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7379b9d090 CR3: 000000001ba82000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 userfaultfd_release+0x4c5/0x670 fs/userfaultfd.c:884
 __fput+0x277/0x9d0 fs/file_table.c:317
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f928403bd4b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fffeaca9980 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f928403bd4b
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f928419d960 R08: 0000000000000000 R09: 00007f92841a01a8
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000124b3
R13: 00007fffeaca9a80 R14: 00007f928419c030 R15: 0000000000000032
 </TASK>