syzbot

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WARNING: CPU: 0 PID: 4315 at include/linux/fs.h:532 i_mmap_assert_write_locked include/linux/fs.h:532 [inline]
WARNING: CPU: 0 PID: 4315 at include/linux/fs.h:532 hugetlb_split+0x237/0x2a0 mm/hugetlb.c:4182
Modules linked in:
CPU: 0 PID: 4315 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:i_mmap_assert_write_locked include/linux/fs.h:532 [inline]
RIP: 0010:hugetlb_split+0x237/0x2a0 mm/hugetlb.c:4182
Code: bf ff 4c 89 f7 48 89 de 4c 89 fa 31 c9 5b 41 5c 41 5d 41 5e 41 5f 5d eb 7a e8 65 ad bf ff 0f 0b e9 62 fe ff ff e8 59 ad bf ff <0f> 0b e9 2d ff ff ff 48 c7 c1 84 3a 8a 8d 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000312f8e0 EFLAGS: 00010293
RAX: ffffffff81b99b97 RBX: 0000200000400000 RCX: ffff888020e20000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802c7338bf R09: 1ffff110058e6717
R10: dffffc0000000000 R11: ffffed10058e6718 R12: ffff88807a8e2f10
R13: dffffc0000000000 R14: ffff88807a8e2e70 R15: ffff88802c31c1c0
FS:  0000555582c38500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 0000000024660000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __vma_adjust+0x2b6/0x1c10 mm/mmap.c:843
 vma_adjust include/linux/mm.h:2567 [inline]
 __split_vma+0x34b/0x410 mm/mmap.c:-1
 userfaultfd_register fs/userfaultfd.c:1443 [inline]
 userfaultfd_ioctl+0x2fa4/0x4170 fs/userfaultfd.c:1990
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2cb66a3e59
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:00007ffef9e694e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2cb691cfa0 RCX: 00007f2cb66a3e59
RDX: 0000200000000040 RSI: 00000000c020aa00 RDI: 0000000000000003
RBP: 00007f2cb6739d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2cb691cfac R14: 00007f2cb691cfa0 R15: 00007f2cb691cfa0
 </TASK>