On Wed, Aug 29, 2018 at 7:17 PM, syzbot <syzbot+21016130b0580a9de...@syzkaller.appspotmail.com> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 817e60a7a2bb Merge branch 'nfp-add-NFP5000-support' > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1536d296400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=531a917630d2a492 > dashboard link: https://syzkaller.appspot.com/bug?extid=21016130b0580a9de3b5 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+21016130b0580a9de...@syzkaller.appspotmail.com
Hi John, Tyler, I've switched syzbot from selinux to apparmor as we discussed on lss: https://github.com/google/syzkaller/commit/2c6cb254ae6c06f61e3aba21bb89ffb05b5db946 As expedited fix for this as possible would be nice to get, because we are currently getting 1 machine crash/minute on this bug: https://syzkaller.appspot.com/bug?extid=ab1882df6ecbb06d59be > ------------[ cut here ]------------ > AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): > WARNING: CPU: 0 PID: 14826 at security/apparmor/secid.c:82 > apparmor_secid_to_secctx+0x2b5/0x2f0 security/apparmor/secid.c:82 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 14826 Comm: syz-executor1 Not tainted 4.19.0-rc1+ #193 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > panic+0x238/0x4e7 kernel/panic.c:184 > __warn.cold.8+0x163/0x1ba kernel/panic.c:536 > report_bug+0x252/0x2d0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:178 [inline] > do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993 > RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 security/apparmor/secid.c:82 > Code: c7 c7 40 66 58 87 e8 6a 6d 0f fe 0f 0b e9 6c fe ff ff e8 3e aa 44 fe > 48 c7 c6 80 67 58 87 48 c7 c7 a0 65 58 87 e8 4b 6d 0f fe <0f> 0b e9 3f fe ff > ff 48 89 df e8 fc a7 83 fe e9 ed fe ff ff bb f4 > RSP: 0018:ffff8801ba1bed10 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: ffff8801ba1beed0 RCX: ffffc9000227e000 > RDX: 0000000000018482 RSI: ffffffff8163ac01 RDI: 0000000000000001 > RBP: ffff8801ba1bed30 R08: ffff8801b80ec080 R09: ffffed003b603eca > R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801ba1beed0 > security_secid_to_secctx+0x63/0xc0 security/security.c:1314 > ctnetlink_secctx_size net/netfilter/nf_conntrack_netlink.c:621 [inline] > ctnetlink_nlmsg_size net/netfilter/nf_conntrack_netlink.c:659 [inline] > ctnetlink_conntrack_event+0x303/0x1470 > net/netfilter/nf_conntrack_netlink.c:706 > nf_conntrack_eventmask_report+0x55f/0x930 > net/netfilter/nf_conntrack_ecache.c:151 > nf_conntrack_event_report include/net/netfilter/nf_conntrack_ecache.h:112 > [inline] > nf_ct_delete+0x33c/0x5d0 net/netfilter/nf_conntrack_core.c:601 > nf_ct_iterate_cleanup+0x48c/0x5e0 net/netfilter/nf_conntrack_core.c:1892 > nf_ct_iterate_cleanup_net+0x23c/0x2d0 > net/netfilter/nf_conntrack_core.c:1974 > ctnetlink_flush_conntrack net/netfilter/nf_conntrack_netlink.c:1226 > [inline] > ctnetlink_del_conntrack+0x66c/0x850 > net/netfilter/nf_conntrack_netlink.c:1258 > nfnetlink_rcv_msg+0xd88/0x1070 net/netfilter/nfnetlink.c:228 > netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454 > nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560 > netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] > netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1343 > netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908 > sock_sendmsg_nosec net/socket.c:621 [inline] > sock_sendmsg+0xd5/0x120 net/socket.c:631 > ___sys_sendmsg+0x7fd/0x930 net/socket.c:2114 > __sys_sendmsg+0x11d/0x290 net/socket.c:2152 > __do_sys_sendmsg net/socket.c:2161 [inline] > __se_sys_sendmsg net/socket.c:2159 [inline] > __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2159 > do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x457089 > Code: fd b4 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f7bc6e03c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 00007f7bc6e046d4 RCX: 0000000000457089 > RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 > RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff > R13: 00000000004d4588 R14: 00000000004c8d5c R15: 0000000000000000 > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > 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 syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot.
