do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1040
 ia32_sys_call+0x13f8/0x1bb0 arch/x86/include/generated/asm/syscalls_32.h:253
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1460!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 1102 Comm: kworker/u32:7 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: writeback wb_workfn (flush-9p-7)
RIP: 0010:folio_get include/linux/mm.h:1460 [inline]
RIP: 0010:get_page include/linux/mm.h:1466 [inline]
RIP: 0010:iter_folioq_get_pages lib/iov_iter.c:1030 [inline]
RIP: 0010:__iov_iter_get_pages_alloc+0x1d1e/0x2240 lib/iov_iter.c:1201
Code: b0 8b 48 89 df e8 32 4b 4e fd 90 0f 0b 49 89 c5 e9 99 f6 ff ff e8 f2 db 09 fd 48 c7 c6 20 44 b0 8b 4c 89 e7 e8 13 4b 4e fd 90 <0f> 0b e8 db db 09 fd 4c 8b 64 24 48 49 83 ec 01 e9 94 fd ff ff 4c
RSP: 0018:ffffc900063aeb48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000000001b RCX: 0000000000000000
RDX: ffff888025a74880 RSI: ffffffff848148dd RDI: ffff888025a74cc4
RBP: ffffea0001b3f634 R08: 0000000000000001 R09: fffffbfff2d27916
R10: ffffffff9693c8b7 R11: ffff88802b828a40 R12: ffffea0001b3f600
R13: ffff88801200b400 R14: 0000000000001000 R15: 0000000000001000
FS:  0000000000000000(0000) GS:ffff88802b700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000056d7c448 CR3: 000000006295c000 CR4: 0000000000350ef0
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+0x1ac/0x1460 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:223
 netfs_issue_write fs/netfs/write_issue.c:250 [inline]
 netfs_advance_write fs/netfs/write_issue.c:291 [inline]
 netfs_advance_write+0x384/0xbd0 fs/netfs/write_issue.c:259
 netfs_write_folio+0xc44/0x18f0 fs/netfs/write_issue.c:469
 netfs_writepages+0x2ba/0xb90 fs/netfs/write_issue.c:541
 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683
 __writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1658
 writeback_sb_inodes+0x611/0xfb0 fs/fs-writeback.c:1954
 __writeback_inodes_wb+0xff/0x2e0 fs/fs-writeback.c:2025
 wb_writeback+0x721/0xb50 fs/fs-writeback.c:2136
 wb_check_background_flush fs/fs-writeback.c:2206 [inline]
 wb_do_writeback fs/fs-writeback.c:2294 [inline]
 wb_workfn+0x8c4/0xf40 fs/fs-writeback.c:2321
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_get include/linux/mm.h:1460 [inline]
RIP: 0010:get_page include/linux/mm.h:1466 [inline]
RIP: 0010:iter_folioq_get_pages lib/iov_iter.c:1030 [inline]
RIP: 0010:__iov_iter_get_pages_alloc+0x1d1e/0x2240 lib/iov_iter.c:1201
Code: b0 8b 48 89 df e8 32 4b 4e fd 90 0f 0b 49 89 c5 e9 99 f6 ff ff e8 f2 db 09 fd 48 c7 c6 20 44 b0 8b 4c 89 e7 e8 13 4b 4e fd 90 <0f> 0b e8 db db 09 fd 4c 8b 64 24 48 49 83 ec 01 e9 94 fd ff ff 4c
RSP: 0018:ffffc900063aeb48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000000001b RCX: 0000000000000000
RDX: ffff888025a74880 RSI: ffffffff848148dd RDI: ffff888025a74cc4
RBP: ffffea0001b3f634 R08: 0000000000000001 R09: fffffbfff2d27916
R10: ffffffff9693c8b7 R11: ffff88802b828a40 R12: ffffea0001b3f600
R13: ffff88801200b400 R14: 0000000000001000 R15: 0000000000001000
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000056d7c4ac CR3: 0000000059200000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400