On Fri, Jun 8, 2018 at 3:11 PM, syzbot <syzbot+772c951c5f15d2f1df03@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 7170e6045a6a strparser: Add __strp_unpause and use it in k.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15b5c8cf800000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a601a80fec461d44 > dashboard link: https://syzkaller.appspot.com/bug?extid=772c951c5f15d2f1df03 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=13ad0b6f800000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+772c951c5f15d2f1df03@xxxxxxxxxxxxxxxxxxxxxxxxx This seems to be same as the splash of other crashes in bpfilter: #syz fix: bpfilter: fix race in pipe access > 8021q: adding VLAN 0 to HW filter on device team0 > 8021q: adding VLAN 0 to HW filter on device team0 > bpfilter: read fail -512 > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 1 PID: 6572 Comm: syz-executor5 Not tainted 4.17.0-rc7+ #82 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:pipe_write+0xa49/0xeb0 fs/pipe.c:480 > RSP: 0000:ffff8801ac6b7858 EFLAGS: 00010206 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81c22b3b > RDX: 0000000000000005 RSI: ffffffff81c22b49 RDI: 0000000000000028 > RBP: ffff8801ac6b78d8 R08: ffff8801b3796080 R09: 0000000000000006 > R10: ffff8801b3796080 R11: 0000000000000000 R12: ffff8801cdbaa820 > R13: ffff8801cdb31a40 R14: 0000000000000000 R15: dffffc0000000000 > FS: 00007fe12b0e9700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fe01b0f9af0 CR3: 00000001c43e7000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > call_write_iter include/linux/fs.h:1784 [inline] > new_sync_write fs/read_write.c:474 [inline] > __vfs_write+0x64d/0x960 fs/read_write.c:487 > __kernel_write+0x10c/0x380 fs/read_write.c:506 > __bpfilter_process_sockopt+0x1d8/0x35b net/bpfilter/bpfilter_kern.c:66 > bpfilter_mbox_request+0x4d/0xb0 net/ipv4/bpfilter/sockopt.c:25 > bpfilter_ip_set_sockopt+0x33/0x40 net/ipv4/bpfilter/sockopt.c:31 > ip_setsockopt+0x124/0x140 net/ipv4/ip_sockglue.c:1250 > raw_setsockopt+0xe2/0x100 net/ipv4/raw.c:868 > sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3059 > __sys_setsockopt+0x1bd/0x390 net/socket.c:1903 > __do_sys_setsockopt net/socket.c:1914 [inline] > __se_sys_setsockopt net/socket.c:1911 [inline] > __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911 > do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x4559f9 > RSP: 002b:00007fe12b0e8c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 > RAX: ffffffffffffffda RBX: 00007fe12b0e96d4 RCX: 00000000004559f9 > RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000004 > RBP: 000000000072bf50 R08: 0000000000000370 R09: 0000000000000000 > R10: 00000000200003c0 R11: 0000000000000246 R12: 00000000ffffffff > R13: 00000000004c0d8b R14: 00000000004d0828 R15: 0000000000000001 > Code: 48 c1 ea 03 80 3c 02 00 0f 85 fc 03 00 00 48 8b 45 c8 48 8b 58 20 48 > b8 00 00 00 00 00 fc ff df 48 8d 7b 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > 85 ef 03 00 00 48 8b 7b 28 31 d2 be 01 00 00 00 > RIP: pipe_write+0xa49/0xeb0 fs/pipe.c:480 RSP: ffff8801ac6b7858 > ---[ end trace 7e44f4b8135e2e72 ]--- > > > --- > 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@xxxxxxxxxxxxxxxx. > > 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 > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000c109af056e2121a4%40google.com. > For more options, visit https://groups.google.com/d/optout.
