arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1444!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5682 Comm: syz.1.64 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:folio_get include/linux/mm.h:1444 [inline]
RIP: 0010:get_page include/linux/mm.h:1450 [inline]
RIP: 0010:iter_folioq_get_pages lib/iov_iter.c:1030 [inline]
RIP: 0010:__iov_iter_get_pages_alloc+0x1d10/0x2230 lib/iov_iter.c:1201
Code: d1 8b 48 89 df e8 c0 6a 45 fd 90 0f 0b 49 89 c5 e9 99 f6 ff ff e8 10 aa ff fc 48 c7 c6 40 3b d1 8b 4c 89 e7 e8 a1 6a 45 fd 90 <0f> 0b e8 f9 a9 ff fc 4c 8b 64 24 48 49 83 ec 01 e9 94 fd ff ff 4c
RSP: 0018:ffffc900036f6c08 EFLAGS: 00010283
RAX: 0000000000022fd3 RBX: 0000000000000000 RCX: ffffc90006211000
RDX: 0000000000040000 RSI: ffffffff848ddeef RDI: ffff888023158444
RBP: ffffea000130c774 R08: 0000000000000001 R09: fffffbfff2dc49b4
R10: ffffffff96e24da7 R11: ffffffff815fbe4e R12: ffffea000130c740
R13: ffff88802848f000 R14: 0000000000001000 R15: 0000000000001000
FS:  00007fe895b616c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c381088 CR3: 0000000049a20000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iov_iter_get_pages_alloc2+0x53/0xf0 lib/iov_iter.c:1225
 p9_get_mapped_pages.part.0.constprop.0+0x4ca/0x7d0 net/9p/trans_virtio.c:333
 p9_get_mapped_pages net/9p/trans_virtio.c:318 [inline]
 p9_virtio_zc_request+0x1be/0x1390 net/9p/trans_virtio.c:439
 p9_client_zc_rpc.constprop.0+0x29a/0x880 net/9p/client.c:808
 p9_client_write+0x447/0x680 net/9p/client.c:1631
 v9fs_issue_write+0xe2/0x180 fs/9p/vfs_addr.c:59
 netfs_do_issue_write+0x92/0x110 fs/netfs/write_issue.c:233
 netfs_issue_write fs/netfs/write_issue.c:260 [inline]
 netfs_advance_write+0x164/0xc80 fs/netfs/write_issue.c:284
 netfs_write_folio+0xc19/0x1930 fs/netfs/write_issue.c:485
 netfs_writepages+0x2ba/0xb90 fs/netfs/write_issue.c:557
 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683
 filemap_fdatawrite_wbc mm/filemap.c:398 [inline]
 filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:388
 v9fs_mmap_vm_close+0x1ff/0x250 fs/9p/vfs_file.c:502
 remove_vma+0xa8/0x1a0 mm/vma.c:330
 vms_complete_munmap_vmas+0x59d/0x9a0 mm/vma.c:1156
 do_vmi_align_munmap+0x61b/0x890 mm/vma.c:1349
 do_vmi_munmap+0x20b/0x3e0 mm/vma.c:1397
 do_munmap+0xbe/0x100 mm/mmap.c:1357
 mremap_to mm/mremap.c:911 [inline]
 __do_sys_mremap+0x1361/0x15b0 mm/mremap.c:1069
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe894d7dff9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe895b61038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007fe894f35f80 RCX: 00007fe894d7dff9
RDX: 0000000000400000 RSI: 0000000000001000 RDI: 0000000020a96000
RBP: 00007fe894df0296 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe894f35f80 R15: 00007ffdc1246148
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_get include/linux/mm.h:1444 [inline]
RIP: 0010:get_page include/linux/mm.h:1450 [inline]
RIP: 0010:iter_folioq_get_pages lib/iov_iter.c:1030 [inline]
RIP: 0010:__iov_iter_get_pages_alloc+0x1d10/0x2230 lib/iov_iter.c:1201
Code: d1 8b 48 89 df e8 c0 6a 45 fd 90 0f 0b 49 89 c5 e9 99 f6 ff ff e8 10 aa ff fc 48 c7 c6 40 3b d1 8b 4c 89 e7 e8 a1 6a 45 fd 90 <0f> 0b e8 f9 a9 ff fc 4c 8b 64 24 48 49 83 ec 01 e9 94 fd ff ff 4c
RSP: 0018:ffffc900036f6c08 EFLAGS: 00010283
RAX: 0000000000022fd3 RBX: 0000000000000000 RCX: ffffc90006211000
RDX: 0000000000040000 RSI: ffffffff848ddeef RDI: ffff888023158444
RBP: ffffea000130c774 R08: 0000000000000001 R09: fffffbfff2dc49b4
R10: ffffffff96e24da7 R11: ffffffff815fbe4e R12: ffffea000130c740
R13: ffff88802848f000 R14: 0000000000001000 R15: 0000000000001000
FS:  00007fe895b616c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31af1ff8 CR3: 0000000049a20000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400