WARNING in dev_change_net

WARNING in dev_change_net_namespace
Status: upstream: reported syz repro on 2020/02/11 16:06
Reported-by: syzbot+830c6dbfc71edc4f0b8f@syzkaller.appspotmail.com
First crash: 142d, last: 26d

Cause bisection: introduced by (bisect log):

commit 13dc4d836179444f0ca90188cfccd23f9cd9ff05
Author: Will Deacon <will@kernel.org>
Date: Tue Apr 21 14:29:18 2020 +0000

arm64: cpufeature: Remove redundant call to id_aa64pfr0_32bit_el0()

Crash: WARNING in dev_change_net_namespace (log)
Repro: syz .config

similar bugs (2):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
linux-4.19	WARNING in dev_change_net_namespace			4	7d14h	171d	0/1	upstream: reported on 2020/01/13 08:39
linux-4.14	WARNING in dev_change_net_namespace			1	21d	21d	0/1	upstream: reported on 2020/06/10 22:13

Sample crash report:

RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000000a04 R14: 00000000004cce0c R15: 00007f9ea16a16d4
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8201 at net/core/dev.c:10239 dev_change_net_namespace+0x15bb/0x1710 net/core/dev.c:10239
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8201 Comm: syz-executor.0 Not tainted 5.7.0-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:105 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:dev_change_net_namespace+0x15bb/0x1710 net/core/dev.c:10239
Code: 5f 00 03 01 48 c7 c7 2c 28 e9 88 48 c7 c6 6f 6d 07 89 ba a8 27 00 00 31 c0 e8 c1 76 de fa 0f 0b e9 f5 ea ff ff e8 85 b0 0c fb <0f> 0b e9 fb fd ff ff e8 79 b0 0c fb 0f 0b e9 1b fe ff ff e8 6d b0
RSP: 0018:ffffc9000a3f7160 EFLAGS: 00010293
RAX: ffffffff8667f2ab RBX: 00000000fffffff4 RCX: ffff88808f6d43c0
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: ffffc9000a3f7270 R08: ffffffff8667f096 R09: ffffed1015d270fc
R10: ffffed1015d270fc R11: 0000000000000000 R12: ffff8880888600b8
R13: ffff888088860b90 R14: dffffc0000000000 R15: dffffc0000000000
 do_setlink+0x196/0x3900 net/core/rtnetlink.c:2510
 __rtnl_newlink net/core/rtnetlink.c:3273 [inline]
 rtnl_newlink+0x1509/0x1c00 net/core/rtnetlink.c:3398
 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5461
 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+0x519/0x800 net/socket.c:2352
 ___sys_sendmsg net/socket.c:2406 [inline]
 __sys_sendmsg+0x2b1/0x360 net/socket.c:2439
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca69
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9ea16a0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000500f80 RCX: 000000000045ca69
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000000a04 R14: 00000000004cce0c R15: 00007f9ea16a16d4
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (6):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Maintainers
ci-upstream-kasan-gce-smack-root	2020/06/06 10:20	upstream	7ae77150	e6b89e4e	.config	log	report	syz	andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hawk@kernel.org, jiri@mellanox.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/06/06 09:19	upstream	7ae77150	e6b89e4e	.config	log	report		andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hawk@kernel.org, jiri@mellanox.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/05/25 00:49	upstream	caffb99b	bd28eb9d	.config	log	report		andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hawk@kernel.org, jiri@mellanox.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/05/15 04:24	upstream	8c1684bb	2d572622	.config	log	report		andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hawk@kernel.org, jiri@mellanox.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
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