On Mon, Sep 30, 2019 at 9:17 AM syzbot <syzbot+a5765ed8cdb1cca4d249@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: Thank you Mr Syzcaller. I am on it. /Magnus > HEAD commit: a3c0e7b1 Merge tag 'libnvdimm-fixes-5.4-rc1' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=14f05435600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6ffbfa7e4a36190f > dashboard link: https://syzkaller.appspot.com/bug?extid=a5765ed8cdb1cca4d249 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1096d835600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129f15f3600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+a5765ed8cdb1cca4d249@xxxxxxxxxxxxxxxxxxxxxxxxx > > IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready > 8021q: adding VLAN 0 to HW filter on device batadv0 > BUG: kernel NULL pointer dereference, address: 0000000000000000 > #PF: supervisor instruction fetch in kernel mode > #PF: error_code(0x0010) - not-present page > PGD 99226067 P4D 99226067 PUD 8fa47067 PMD 0 > Oops: 0010 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 8719 Comm: syz-executor502 Not tainted 5.3.0+ #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:0x0 > Code: Bad RIP value. > RSP: 0018:ffff88809dd4f848 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: ffff88808c06d740 RCX: 1ffff1101180db7c > RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88809a190b00 > RBP: ffff88809dd4f880 R08: ffff8880921924c0 R09: ffffed101180db31 > R10: ffffed101180db30 R11: ffff88808c06d987 R12: 0000000000000002 > R13: 0000000000000304 R14: ffff88809a190b00 R15: 0000000000000000 > FS: 0000000001b27880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffffffffffd6 CR3: 00000000a307a000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > xsk_poll+0x1e7/0x5a0 net/xdp/xsk.c:430 > sock_poll+0x15e/0x480 net/socket.c:1256 > vfs_poll include/linux/poll.h:90 [inline] > do_pollfd fs/select.c:859 [inline] > do_poll fs/select.c:907 [inline] > do_sys_poll+0x63c/0xdd0 fs/select.c:1001 > __do_sys_ppoll fs/select.c:1101 [inline] > __se_sys_ppoll fs/select.c:1081 [inline] > __x64_sys_ppoll+0x259/0x310 fs/select.c:1081 > do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x441bd9 > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffd48824e98 EFLAGS: 00000246 ORIG_RAX: 000000000000010f > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441bd9 > RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000020000040 > RBP: 00007ffd48824eb0 R08: 0000000000000000 R09: 0000000001bbbbbb > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000403170 R14: 0000000000000000 R15: 0000000000000000 > Modules linked in: > CR2: 0000000000000000 > ---[ end trace e262cafe88422aec ]--- > RIP: 0010:0x0 > Code: Bad RIP value. > RSP: 0018:ffff88809dd4f848 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: ffff88808c06d740 RCX: 1ffff1101180db7c > RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88809a190b00 > RBP: ffff88809dd4f880 R08: ffff8880921924c0 R09: ffffed101180db31 > R10: ffffed101180db30 R11: ffff88808c06d987 R12: 0000000000000002 > R13: 0000000000000304 R14: ffff88809a190b00 R15: 0000000000000000 > FS: 0000000001b27880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffffffffffd6 CR3: 00000000a307a000 CR4: 00000000001406f0 > 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@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches
