[syzbot] [mm?] [io-uring?] WARNING in get_pte_pfn

syzbot
2023-12-22T08:11:22Z

Hello,

syzbot found the following issue on:

HEAD commit: 0e389834672c Merge tag 'for-6.7-rc5-tag' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1454824ee80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f21aff374937e60e
dashboard link: https://syzkaller.appspot.com/bug?extid=03fd9b3f71641f0ebf2d
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13b4ef49e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118314d6e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e58cd74e152a/disk-0e389834.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/45d17ccb34bc/vmlinux-0e389834.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b9b7105d4e08/bzImage-0e389834.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+03fd9b3f71641f0ebf2d@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5066 at mm/vmscan.c:3242 get_pte_pfn+0x1b5/0x3f0 mm/vmscan.c:3242
Modules linked in:
CPU: 1 PID: 5066 Comm: syz-executor668 Not tainted 6.7.0-rc5-syzkaller-00270-g0e389834672c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:get_pte_pfn+0x1b5/0x3f0 mm/vmscan.c:3242
Code: f3 74 2a e8 6d 78 cb ff 31 ff 48 b8 00 00 00 00 00 00 00 02 48 21 c5 48 89 ee e8 e6 73 cb ff 48 85 ed 74 4e e8 4c 78 cb ff 90 <0f> 0b 90 48 c7 c3 ff ff ff ff e8 3c 78 cb ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc900041e6878 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000007891d RCX: ffffffff81bbf6e3
RDX: ffff88807d813b80 RSI: ffffffff81bbf684 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000003 R12: 0000000000000200
R13: 1ffff9200083cd0f R14: 0000000000010b21 R15: 0000000020ffc000
FS: 0000555555f4d480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005fbfa000 CR4: 0000000000350ef0
Call Trace:
<TASK>
lru_gen_look_around+0x70d/0x11a0 mm/vmscan.c:4001
folio_referenced_one+0x5a2/0xf70 mm/rmap.c:843
rmap_walk_anon+0x225/0x570 mm/rmap.c:2485
rmap_walk mm/rmap.c:2562 [inline]
rmap_walk mm/rmap.c:2557 [inline]
folio_referenced+0x28a/0x4b0 mm/rmap.c:960
folio_check_references mm/vmscan.c:829 [inline]
shrink_folio_list+0x1ace/0x3f00 mm/vmscan.c:1160
evict_folios+0x6e7/0x1b90 mm/vmscan.c:4499
try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4704
lru_gen_shrink_lruvec mm/vmscan.c:4849 [inline]
shrink_lruvec+0x314/0x2990 mm/vmscan.c:5622
shrink_node_memcgs mm/vmscan.c:5842 [inline]
shrink_node+0x811/0x3710 mm/vmscan.c:5877
shrink_zones mm/vmscan.c:6116 [inline]
do_try_to_free_pages+0x36c/0x1940 mm/vmscan.c:6178
try_to_free_mem_cgroup_pages+0x31a/0x770 mm/vmscan.c:6493
try_charge_memcg+0x3d3/0x11f0 mm/memcontrol.c:2742
obj_cgroup_charge_pages mm/memcontrol.c:3255 [inline]
__memcg_kmem_charge_page+0xdd/0x2a0 mm/memcontrol.c:3281
__alloc_pages+0x263/0x2420 mm/page_alloc.c:4585
alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
__get_free_pages+0xc/0x40 mm/page_alloc.c:4615
io_mem_alloc+0x33/0x60 io_uring/io_uring.c:2789
io_allocate_scq_urings io_uring/io_uring.c:3842 [inline]
io_uring_create io_uring/io_uring.c:4019 [inline]
io_uring_setup+0x13ed/0x2430 io_uring/io_uring.c:4131
__do_sys_io_uring_setup io_uring/io_uring.c:4158 [inline]
__se_sys_io_uring_setup io_uring/io_uring.c:4152 [inline]
__x64_sys_io_uring_setup+0x98/0x140 io_uring/io_uring.c:4152
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f4b0e4778a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 1a 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff814fe868 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4b0e4778a9
RDX: 0000000020000700 RSI: 0000000020000640 RDI: 0000000000005a19
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000020000700
R10: 00007fff814fe8d0 R11: 0000000000000202 R12: 0000000020000640
R13: 0000000000000000 R14: 0000000000005a19 R15: 0000000020000700
</TASK>

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup