On Tue, Nov 19, 2019 at 1:35 PM syzbot <syzbot+e2e5c07bf353b2f79daa@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 1e8795b1 mscc.c: fix semicolon.cocci warnings > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15d77406e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e855e9c92c9474fe > dashboard link: https://syzkaller.appspot.com/bug?extid=e2e5c07bf353b2f79daa > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1537f46ae00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11359c6ae00000 > > The bug was bisected to: > > commit f366cd2a2e510b155e18b21a2d149332aa08eb61 > Author: Vadim Pasternak <vadimp@xxxxxxxxxxxx> > Date: Mon Oct 21 10:30:30 2019 +0000 > > mlxsw: reg: Add macro for getting QSFP module EEPROM page number > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=148945aae00000 > final crash: https://syzkaller.appspot.com/x/report.txt?x=168945aae00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=128945aae00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+e2e5c07bf353b2f79daa@xxxxxxxxxxxxxxxxxxxxxxxxx > Fixes: f366cd2a2e51 ("mlxsw: reg: Add macro for getting QSFP module EEPROM > page number") I'm working on this issue. I think the problem is related to ac03046ece2b "vsock/virtio: free packets during the socket release" I'll send a patch ASAP. Thanks, Stefano > > RDX: 0000000000000010 RSI: 00000000200000c0 RDI: 0000000000000004 > RBP: 0000000000000005 R08: 0000000000000001 R09: 00007ffd5b250031 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e00 > R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000 > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 8862 Comm: syz-executor079 Not tainted 5.4.0-rc6+ #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:virtio_transport_release+0x13b/0xcb0 > net/vmw_vsock/virtio_transport_common.c:826 > Code: e8 aa e6 2b fa 66 41 83 fd 01 0f 84 34 02 00 00 e8 3a e5 2b fa 48 8b > 95 30 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f > 85 22 0a 00 00 48 8b bb 98 00 00 00 48 b8 00 00 00 > RSP: 0018:ffff888092dbfaf0 EFLAGS: 00010202 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87474aa0 > RDX: 0000000000000013 RSI: ffffffff874747d6 RDI: 0000000000000001 > RBP: ffff888092dbfc00 R08: ffff88809245a380 R09: fffffbfff1555fe1 > R10: fffffbfff1555fe0 R11: 0000000000000003 R12: ffff888092dbfbd8 > R13: 0000000000000007 R14: 0000000000000007 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000200000c4 CR3: 0000000008e6d000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > __vsock_release+0x80/0x2d0 net/vmw_vsock/af_vsock.c:733 > vsock_release+0x35/0xa0 net/vmw_vsock/af_vsock.c:806 > __sock_release+0xce/0x280 net/socket.c:590 > sock_close+0x1e/0x30 net/socket.c:1268 > __fput+0x2ff/0x890 fs/file_table.c:280 > ____fput+0x16/0x20 fs/file_table.c:313 > task_work_run+0x145/0x1c0 kernel/task_work.c:113 > exit_task_work include/linux/task_work.h:22 [inline] > do_exit+0x904/0x2e60 kernel/exit.c:817 > do_group_exit+0x135/0x360 kernel/exit.c:921 > __do_sys_exit_group kernel/exit.c:932 [inline] > __se_sys_exit_group kernel/exit.c:930 [inline] > __x64_sys_exit_group+0x44/0x50 kernel/exit.c:930 > do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x43f1d8 > Code: Bad RIP value. > RSP: 002b:00007ffd5b25f838 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f1d8 > RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 > RBP: 00000000004befa8 R08: 00000000000000e7 R09: ffffffffffffffd0 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 > R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 > Modules linked in: > ---[ end trace 4b9b883ea3ab661f ]--- > RIP: 0010:virtio_transport_release+0x13b/0xcb0 > net/vmw_vsock/virtio_transport_common.c:826 > Code: e8 aa e6 2b fa 66 41 83 fd 01 0f 84 34 02 00 00 e8 3a e5 2b fa 48 8b > 95 30 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f > 85 22 0a 00 00 48 8b bb 98 00 00 00 48 b8 00 00 00 > RSP: 0018:ffff888092dbfaf0 EFLAGS: 00010202 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87474aa0 > RDX: 0000000000000013 RSI: ffffffff874747d6 RDI: 0000000000000001 > RBP: ffff888092dbfc00 R08: ffff88809245a380 R09: fffffbfff1555fe1 > R10: fffffbfff1555fe0 R11: 0000000000000003 R12: ffff888092dbfbd8 > R13: 0000000000000007 R14: 0000000000000007 R15: 0000000000000000 > FS: 00000000009db880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000043f1ae CR3: 0000000008e6d000 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. > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches >
