Hello, syzbot found the following issue on: HEAD commit: d4d016caa4b8 alpha: move __udiv_qrnnd library function to .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1564ae79300000 kernel config: https://syzkaller.appspot.com/x/.config?x=6d93fe4341f98704 dashboard link: https://syzkaller.appspot.com/bug?extid=afe1d3c5ccb5940c372a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+afe1d3c5ccb5940c372a@xxxxxxxxxxxxxxxxxxxxxxxxx io_mem_free.part.0+0xf7/0x140 fs/io_uring.c:8708 io_mem_free fs/io_uring.c:8703 [inline] io_ring_ctx_free fs/io_uring.c:9250 [inline] io_ring_exit_work+0xf20/0x1980 fs/io_uring.c:9408 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:1073! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: mm_percpu_wq vmstat_update RIP: 0010:__free_one_page+0xa10/0xe30 mm/page_alloc.c:1073 Code: 43 34 85 c0 0f 84 79 f9 ff ff 48 c7 c6 80 1b 97 89 48 89 ef e8 61 dd f6 ff 0f 0b 48 c7 c6 60 1a 97 89 4c 89 ef e8 50 dd f6 ff <0f> 0b 0f 0b 48 c7 c6 c0 1a 97 89 4c 89 ef e8 3d dd f6 ff 0f 0b 48 RSP: 0018:ffffc90000ca7968 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffffc90000ca7a60 RCX: 0000000000000000 RDX: ffff888010e40000 RSI: ffffffff81b2f6b0 RDI: 0000000000000003 RBP: 0000000000152200 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff88f44b19 R11: 00000000ffffffff R12: 0000000000000009 R13: ffffea0005488000 R14: 0000000000000000 R15: ffff88823fff8e00 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000036db1000 CR4: 00000000001526f0 Call Trace: free_pcppages_bulk+0x533/0x8a0 mm/page_alloc.c:1537 drain_zone_pages+0x173/0x440 mm/page_alloc.c:3079 refresh_cpu_vm_stats+0x355/0x5d0 mm/vmstat.c:874 vmstat_update+0xe/0xa0 mm/vmstat.c:1910 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace e038b7c668ec2f59 ]--- RIP: 0010:__free_one_page+0xa10/0xe30 mm/page_alloc.c:1073 Code: 43 34 85 c0 0f 84 79 f9 ff ff 48 c7 c6 80 1b 97 89 48 89 ef e8 61 dd f6 ff 0f 0b 48 c7 c6 60 1a 97 89 4c 89 ef e8 50 dd f6 ff <0f> 0b 0f 0b 48 c7 c6 c0 1a 97 89 4c 89 ef e8 3d dd f6 ff 0f 0b 48 RSP: 0018:ffffc90000ca7968 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffffc90000ca7a60 RCX: 0000000000000000 RDX: ffff888010e40000 RSI: ffffffff81b2f6b0 RDI: 0000000000000003 RBP: 0000000000152200 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff88f44b19 R11: 00000000ffffffff R12: 0000000000000009 R13: ffffea0005488000 R14: 0000000000000000 R15: ffff88823fff8e00 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000036db1000 CR4: 00000000001526f0 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
