From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: BUG: unable to handle kernel paging request in bpf_int_jit_compile Date: Sat, 23 Jun 2018 21:09:02 -0700 Message-ID: <000000000000d48c8e056f5b6c67@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes To: ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net, hpa@zytor.com, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, mingo@redhat.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org, yoshfuji@linux-ipv6.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 5e2204832b20 Merge tag 'powerpc-4.18-2' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=148b5a90400000 kernel config: https://syzkaller.appspot.com/x/.config?x=befbcd7305e41bb0 dashboard link: https://syzkaller.appspot.com/bug?extid=a4eb8c7766952a1ca872 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=10ee22d4400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a4eb8c7766952a1ca872@syzkaller.appspotmail.com RAX: ffffffffffffffda RBX: 0000000001429914 RCX: 0000000000455a99 RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004bb7d5 R14: 00000000004c8508 R15: 0000000000000023 BUG: unable to handle kernel paging request at ffffffffa0008002 PGD 8e6d067 P4D 8e6d067 PUD 8e6e063 PMD 1b4528067 PTE 1d433d161 Oops: 0003 [#1] SMP KASAN CPU: 1 PID: 4811 Comm: syz-executor0 Not tainted 4.18.0-rc1+ #114 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bpf_jit_binary_lock_ro include/linux/filter.h:703 [inline] RIP: 0010:bpf_int_jit_compile+0xc36/0xf30 arch/x86/net/bpf_jit_comp.c:1168 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 a0 02 00 00 48 8b 85 00 ff ff ff <80> 60 02 fe e9 c7 fb ff ff e8 ac 00 36 00 48 8b 8d 30 ff ff ff 48 RSP: 0018:ffff8801cfca7998 EFLAGS: 00010246 RAX: ffffffffa0008000 RBX: 0000000000000046 RCX: ffffffff81460e4a RDX: 0000000000000002 RSI: ffffffff81460e58 RDI: 0000000000000005 RBP: ffff8801cfca7ab8 R08: ffff8801aa2121c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90001938002 R13: ffff8801cfca7a90 R14: ffffffffa0008002 R15: 00000000fffffff4 FS: 0000000001429940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa0008002 CR3: 00000001d2c40000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_prog_select_runtime+0x7db/0xa60 kernel/bpf/core.c:1505 bpf_prog_load+0x1194/0x1c60 kernel/bpf/syscall.c:1356 __do_sys_bpf kernel/bpf/syscall.c:2360 [inline] __se_sys_bpf kernel/bpf/syscall.c:2322 [inline] __x64_sys_bpf+0x36c/0x510 kernel/bpf/syscall.c:2322 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a99 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd396676f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000001429914 RCX: 0000000000455a99 RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004bb7d5 R14: 00000000004c8508 R15: 0000000000000023 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: ffffffffa0008002 ---[ end trace fa548fc30dca8c15 ]--- RIP: 0010:bpf_jit_binary_lock_ro include/linux/filter.h:703 [inline] RIP: 0010:bpf_int_jit_compile+0xc36/0xf30 arch/x86/net/bpf_jit_comp.c:1168 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 a0 02 00 00 48 8b 85 00 ff ff ff <80> 60 02 fe e9 c7 fb ff ff e8 ac 00 36 00 48 8b 8d 30 ff ff ff 48 RSP: 0018:ffff8801cfca7998 EFLAGS: 00010246 RAX: ffffffffa0008000 RBX: 0000000000000046 RCX: ffffffff81460e4a RDX: 0000000000000002 RSI: ffffffff81460e58 RDI: 0000000000000005 RBP: ffff8801cfca7ab8 R08: ffff8801aa2121c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90001938002 R13: ffff8801cfca7a90 R14: ffffffffa0008002 R15: 00000000fffffff4 FS: 0000000001429940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa0008002 CR3: 00000001d2c40000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches