On Mon, Aug 9, 2021 at 3:54 PM syzbot <syzbot+fafb46da3f65fdbacd16@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: c2eecaa193ff pktgen: Remove redundant clone_skb override > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1226099a300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=aba0c23f8230e048 > dashboard link: https://syzkaller.appspot.com/bug?extid=fafb46da3f65fdbacd16 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 > > 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+fafb46da3f65fdbacd16@xxxxxxxxxxxxxxxxxxxxxxxxx > > general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN > KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] Hi all, I think the crash can be fixed by [PATCH] ieee802154: hwsim: fix GPF in hwsim_new_edge_nl [1]. For now, it is in the wpan tree. [1] https://lkml.org/lkml/2021/7/8/66 > CPU: 1 PID: 1403 Comm: syz-executor.2 Not tainted 5.14.0-rc3-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:nla_len include/net/netlink.h:1148 [inline] > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline] > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425 > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87 > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000 > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0 > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8 > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698 > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000 > FS: 00007f8448923700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000032f4708 CR3: 0000000033eed000 CR4: 00000000001506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 > genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] > genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 > netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 > genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 > netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 > netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 > sock_sendmsg_nosec net/socket.c:704 [inline] > sock_sendmsg+0xcf/0x120 net/socket.c:724 > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403 > ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x4665e9 > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f8448923188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 > RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000004 > RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 > R13: 00007ffd8ac8e60f R14: 00007f8448923300 R15: 0000000000022000 > Modules linked in: > ---[ end trace d1679fe789931133 ]--- > RIP: 0010:nla_len include/net/netlink.h:1148 [inline] > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline] > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425 > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87 > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000 > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0 > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8 > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698 > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000 > FS: 00007f8448923700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055bb2ea2f160 CR3: 0000000033eed000 CR4: 00000000001506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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. > > -- > 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/0000000000007faf7505c91bb19d%40google.com.
