WARNING in dev_change_net

WARNING in dev_change_net_namespace
Status: upstream: reported on 2020/02/11 16:06
Reported-by: syzbot+830c6dbfc71edc4f0b8f@syzkaller.appspotmail.com
First crash: 56d, last: 14h49m

similar bugs (1):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
linux-4.19	WARNING in dev_change_net_namespace			1	85d	85d	0/1	upstream: reported on 2020/01/13 08:39

Sample crash report:

R13: 00000000000009fc R14: 00000000004ccb5c R15: 0000000000000016
------------[ cut here ]------------
WARNING: CPU: 1 PID: 19049 at net/core/dev.c:10119 dev_change_net_namespace+0x15bb/0x1710 net/core/dev.c:10119
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 19049 Comm: syz-executor.2 Not tainted 5.6.0-syzkaller #0
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+0x1e9/0x30e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1ac/0x2d0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:dev_change_net_namespace+0x15bb/0x1710 net/core/dev.c:10119
Code: f1 0b 03 01 48 c7 c7 aa 0d e8 88 48 c7 c6 0e ff 05 89 ba 30 27 00 00 31 c0 e8 71 61 ec fa 0f 0b e9 f5 ea ff ff e8 a5 4d 1a fb <0f> 0b e9 fb fd ff ff e8 99 4d 1a fb 0f 0b e9 1b fe ff ff e8 8d 4d
RSP: 0018:ffffc900016b7170 EFLAGS: 00010246
RAX: ffffffff865bb32b RBX: 00000000fffffff4 RCX: 0000000000040000
RDX: ffffc9000e3c7000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900016b7280 R08: ffffffff865bb116 R09: fffffbfff1627f1a
R10: fffffbfff1627f1a R11: 0000000000000000 R12: ffff88809ed760b8
R13: ffff88809ed76bb8 R14: dffffc0000000000 R15: dffffc0000000000
 do_setlink+0x196/0x3900 net/core/rtnetlink.c:2503
 __rtnl_newlink net/core/rtnetlink.c:3266 [inline]
 rtnl_newlink+0x1509/0x1c00 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0x4f9/0x7c0 net/socket.c:2362
 ___sys_sendmsg net/socket.c:2416 [inline]
 __sys_sendmsg+0x2a6/0x360 net/socket.c:2449
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c879
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3066c80c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3066c816d4 RCX: 000000000045c879
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00000000000009fc R14: 00000000004ccb5c R15: 0000000000000016
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-smack-root	2020/04/07 06:17	upstream	7e634208	99a96044	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, hawk@kernel.org, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/02/11 08:44	upstream	0a679e13	084454ae	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, hawk@kernel.org, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kuba@kernel.org, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com