------------[ cut here ]------------
WARNING: CPU: 0 PID: 8216 at mm/mmap.c:1072 vma_merge+0x428/0x950 mm/mmap.c:1072
Modules linked in:
CPU: 0 PID: 8216 Comm: syz-executor.4 Not tainted 5.18.0-rc4-next-20220427-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vma_merge+0x428/0x950 mm/mmap.c:1072
Code: 00 e8 5c 1f c4 ff e8 57 1f c4 ff 45 31 f6 e8 4f 1f c4 ff 4c 89 f0 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 38 1f c4 ff <0f> 0b e9 6c fd ff ff e8 2c 1f c4 ff 48 8d bd 88 00 00 00 48 b8 00
RSP: 0018:ffffc900058f7c90 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000008100077 RCX: 0000000000000000
RDX: ffff88801e6b8000 RSI: ffffffff81b62968 RDI: 0000000000000003
RBP: ffff88805400e6c0 R08: 0000000020600000 R09: 0000000000000000
R10: ffffffff81b626ce R11: 0000000000000000 R12: 0000000020ce2000
R13: 0000000020600000 R14: ffff88805400e438 R15: ffff88805400e438
FS:  0000555556d57400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d13c98e950 CR3: 000000004c695000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 userfaultfd_release+0x4c5/0x670 fs/userfaultfd.c:888
 __fput+0x277/0x9d0 fs/file_table.c:317
 task_work_run+0xdd/0x1a0 kernel/task_work.c:169
 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+0x44/0xae
RIP: 0033:0x7f4e0643bd2b
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:00007ffc56022ab0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f4e0643bd2b
RDX: 0000001b30f20000 RSI: 0000001b30f22ef0 RDI: 0000000000000004
RBP: 00007f4e0659d960 R08: 0000000000000000 R09: 00000000d14b317b
R10: 00007ffc5607e090 R11: 0000000000000293 R12: 0000000000043cad
R13: 00007ffc56022bb0 R14: 00007f4e0659c030 R15: 0000000000000032
 </TASK>