bisecting fixing commit since 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
building syzkaller on c8e81ce4c7e3b59e7c83c6fab56c217916f3b3b6
testing commit 9a95f25269bd9257ab9fba7bb14355d50b5f39ec with gcc (GCC) 8.1.0
kernel signature: 1243bbbd9922fe342a8d0aa89bc7c44adb4a8f78e73741fb62bde5bea1813a38
all runs: crashed: invalid opcode in nft_bitwise_ops
testing current HEAD 01364dad1d4577e27a57729d41053f661bb8a5b9
testing commit 01364dad1d4577e27a57729d41053f661bb8a5b9 with gcc (GCC) 8.1.0
kernel signature: c0d698772cde17c2831d6b7fe6956a8a21d395161bc0dfe63da2f8b1c74925a2
all runs: crashed: invalid opcode in nft_bitwise_ops
revisions tested: 2, total time: 23m54.108166445s (build: 16m45.591161663s, test: 6m4.437755035s)
the crash still happens on HEAD
commit msg: Linux 4.14.174
crash: invalid opcode in nft_bitwise_ops
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_0
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7673 Comm: syz-executor.3 Not tainted 4.14.174-syzkaller #0
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808a06c000 task.stack: ffff88808a4c0000
RIP: 0010:nft_bitwise_ops+0x5/0x80
RSP: 0018:ffff88808a4c7098 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000005d
RDX: 1ffffffff1165f5d RSI: ffff88808a4c70d8 RDI: ffff88808a4c7138
RBP: ffff88808a4c71c0 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffed1011498e2c R11: ffff88808a4c7167 R12: ffff88808a4c7138
R13: ffff88808a0a4dc0 R14: ffffffff88b2fab0 R15: ffff88808a4c7198
FS:  00007f3d78cce700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 00000000a8092000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ctnetlink_parse_nat_setup+0x61/0x3d0 net/netfilter/nf_conntrack_netlink.c:1421
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1491 [inline]
 ctnetlink_create_conntrack+0x366/0xf10 net/netfilter/nf_conntrack_netlink.c:1840
 ctnetlink_new_conntrack+0x432/0xd30 net/netfilter/nf_conntrack_netlink.c:1964
 nfnetlink_rcv_msg+0x89a/0xa70 net/netfilter/nfnetlink.c:214
 netlink_rcv_skb+0x133/0x370 net/netlink/af_netlink.c:2433
 nfnetlink_rcv+0x176/0x1570 net/netfilter/nfnetlink.c:515
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x40b/0x600 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x730/0xbd0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:656
 ___sys_sendmsg+0x625/0x920 net/socket.c:2062
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
 __sys_sendmsg+0xc1/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0xd/0x20 net/socket.c:2103
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b349
RSP: 002b:00007f3d78ccdc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3d78cce6d4 RCX: 000000000045b349
RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000941 R14: 00000000004ca9f7 R15: 000000000075bf2c
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d1 4b 85 ff <ff> ff ff 00 00 00 00 00 00 00 00 30 00 00 00 00 00 00 00 30 d5 
RIP: nft_bitwise_ops+0x5/0x80 RSP: ffff88808a4c7098
---[ end trace 5ee8bacf88c98197 ]---
IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready