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Eric Dumazet 5611a00697 ipmr,ip6mr: acquire RTNL before calling ip[6]mr_free_table() on failure path 
ip[6]mr_free_table() can only be called under RTNL lock.

RTNL: assertion failed at net/core/dev.c (10367)
WARNING: CPU: 1 PID: 5890 at net/core/dev.c:10367 unregister_netdevice_many+0x1246/0x1850 net/core/dev.c:10367
Modules linked in:
CPU: 1 PID: 5890 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller-11627-g422ee58dc0ef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unregister_netdevice_many+0x1246/0x1850 net/core/dev.c:10367
Code: 0f 85 9b ee ff ff e8 69 07 4b fa ba 7f 28 00 00 48 c7 c6 00 90 ae 8a 48 c7 c7 40 90 ae 8a c6 05 6d b1 51 06 01 e8 8c 90 d8 01 <0f> 0b e9 70 ee ff ff e8 3e 07 4b fa 4c 89 e7 e8 86 2a 59 fa e9 ee
RSP: 0018:ffffc900046ff6e0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888050f51d00 RSI: ffffffff815fa008 RDI: fffff520008dfece
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815f3d6e R11: 0000000000000000 R12: 00000000fffffff4
R13: dffffc0000000000 R14: ffffc900046ff750 R15: ffff88807b7dc000
FS:  00007f4ab736e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fee0b4f8990 CR3: 000000001e7d2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mroute_clean_tables+0x244/0xb40 net/ipv6/ip6mr.c:1509
 ip6mr_free_table net/ipv6/ip6mr.c:389 [inline]
 ip6mr_rules_init net/ipv6/ip6mr.c:246 [inline]
 ip6mr_net_init net/ipv6/ip6mr.c:1306 [inline]
 ip6mr_net_init+0x3f0/0x4e0 net/ipv6/ip6mr.c:1298
 ops_init+0xaf/0x470 net/core/net_namespace.c:140
 setup_net+0x54f/0xbb0 net/core/net_namespace.c:331
 copy_net_ns+0x318/0x760 net/core/net_namespace.c:475
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178
 copy_process+0x2e0c/0x7300 kernel/fork.c:2167
 kernel_clone+0xe7/0xab0 kernel/fork.c:2555
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2672
 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: 0033:0x7f4ab89f9059
Code: Unable to access opcode bytes at RIP 0x7f4ab89f902f.
RSP: 002b:00007f4ab736e118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f4ab8b0bf60 RCX: 00007f4ab89f9059
RDX: 0000000020000280 RSI: 0000000020000270 RDI: 0000000040200000
RBP: 00007f4ab8a5308d R08: 0000000020000300 R09: 0000000020000300
R10: 00000000200002c0 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffc3977cc1f R14: 00007f4ab736e300 R15: 0000000000022000
 </TASK>

Fixes: f243e5a7859a ("ipmr,ip6mr: call ip6mr_free_table() on failure path")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Cong Wang <cong.wang@bytedance.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Link: https://lore.kernel.org/r/20220208053451.2885398-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-08 20:49:52 -08:00
..
bpfilter
net: Revert "net: optimize the sockptr_t for unified kernel/user address spaces"
2020-08-10 12:06:44 -07:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
2022-01-27 18:53:02 -08:00
af_inet.c
net: bpf: Handle return value of BPF_CGROUP_RUN_PROG_INET{4,6}_POST_BIND()
2022-01-06 17:08:35 -08:00
ah4.c
Networking changes for 5.14.
2021-06-30 15:51:09 -07:00
arp.c
arp: Remove #ifdef CONFIG_PROC_FS
2021-11-22 14:34:07 +00:00
bpf_tcp_ca.c
Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-10 15:56:13 -08:00
cipso_ipv4.c
NET: IPV4: fix error "do not initialise globals to 0"
2021-09-19 12:43:56 +01:00
datagram.c
net/ipv4/datagram.c: remove superfluous header files from datagram.c
2021-09-29 11:39:33 +01:00
devinet.c
ipv4: add net device refcount tracker to struct in_device
2021-12-06 16:05:11 -08:00
esp4_offload.c
net: move gro definitions to include/net/gro.h
2021-11-16 13:16:54 +00:00
esp4.c
ipsec: Remove unneeded extra variable in esp4 esp_ssg_unref()
2021-07-20 16:14:23 +02:00
fib_frontend.c
ipv4: convert fib_num_tclassid_users to atomic_t
2021-12-02 11:56:04 +00:00
fib_lookup.h
ipv4: Fix spelling mistakes
2021-06-07 14:08:30 -07:00
fib_notifier.c
net: ipv4: remove superfluous header files from fib_notifier.c
2021-09-28 17:32:56 -07:00
fib_rules.c
fib: rules: remove duplicated nla policies
2021-12-16 07:18:35 -08:00
fib_semantics.c
ipv4: add net_hash_mix() dispersion to fib_info_laddrhash keys
2022-01-19 08:14:40 -08:00
fib_trie.c
memcg: enable accounting for IP address and routing-related objects
2021-07-20 06:00:38 -07:00
fou.c
gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers
2021-11-24 17:21:42 -08:00
gre_demux.c
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
gre_offload.c
gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers
2021-11-24 17:21:42 -08:00
icmp.c
icmp: fix icmp_ext_echo_iio parsing in icmp_build_probe
2021-10-14 07:54:47 -07:00
igmp.c
ipv4: drop unused assignment
2021-11-14 12:20:44 +00:00
inet_connection_sock.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-12-09 13:23:02 -08:00
inet_diag.c
inet_diag: fix kernel-infoleak for UDP sockets
2021-12-10 21:14:49 -08:00
inet_fragment.c
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-13 13:06:05 +00:00
inet_hashtables.c
bpf: Add ingress_ifindex to bpf_sk_lookup
2021-11-10 16:29:58 -08:00
inet_timewait_sock.c
net: Use generic ns_common::count
2020-08-19 14:06:36 +02:00
inetpeer.c
inetpeer: use div64_ul() and clamp_val() calculate inet_peer_threshold
2021-03-01 13:32:12 -08:00
ip_forward.c
…
ip_fragment.c
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-13 13:06:05 +00:00
ip_gre.c
gre: Don't accidentally set RTO_ONLINK in gre_fill_metadata_dst()
2022-01-11 20:36:08 -08:00
ip_input.c
net: use indirect call helpers for dst_input
2021-02-03 14:51:39 -08:00
ip_options.c
net: clean up codestyle for net/ipv4
2020-08-25 06:28:02 -07:00
ip_output.c
ipv4: tcp: send zero IPID in SYNACK messages
2022-01-27 08:37:02 -08:00
ip_sockglue.c
ipv4: Exposing __ip_sock_set_tos() in ip.h
2021-11-20 14:11:00 +00:00
ip_tunnel_core.c
net: ip_tunnel: clean up endianness conversions
2021-01-08 19:25:35 -08:00
ip_tunnel.c
ip: use dev_addr_set() in tunnels
2021-10-13 09:41:37 -07:00
ip_vti.c
ip: use dev_addr_set() in tunnels
2021-10-13 09:41:37 -07:00
ipcomp.c
Networking changes for 5.14.
2021-06-30 15:51:09 -07:00
ipconfig.c
net: ipconfig: Release the rtnl_lock while waiting for carrier
2021-10-28 14:36:41 +01:00
ipip.c
ip: use dev_addr_set() in tunnels
2021-10-13 09:41:37 -07:00
ipmr_base.c
…
ipmr.c
ipmr,ip6mr: acquire RTNL before calling ip[6]mr_free_table() on failure path
2022-02-08 20:49:52 -08:00
Kconfig
net: ipv4: remove duplicate "the the" phrase in Kconfig text
2020-08-18 16:02:16 -07:00
Makefile
bpf: Clean up sockmap related Kconfigs
2021-02-26 12:28:03 -08:00
metrics.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
netfilter.c
netfilter: Dissect flow after packet mangling
2021-04-18 22:04:16 +02:00
netlink.c
…
nexthop.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
ping.c
ping: fix the sk_bound_dev_if match in ping_lookup
2022-01-24 12:30:12 +00:00
proc.c
Revert "net: snmp: add statistics for tcp small queue check"
2021-12-01 19:06:09 -08:00
protocol.c
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
raw_diag.c
net: Use nlmsg_unicast() instead of netlink_unicast()
2021-07-13 09:28:29 -07:00
raw.c
Networking fixes for 5.17-rc2, including fixes from netfilter and can.
2022-01-27 20:58:39 +02:00
route.c
Namespaceify mtu_expires sysctl
2022-01-04 12:40:22 +00:00
syncookies.c
net: align static siphash keys
2021-11-16 19:07:54 -08:00
sysctl_net_ipv4.c
tcp: remove sk_{tr}x_skb_cache
2021-09-23 12:50:26 +01:00
tcp_bbr.c
bpf: Enable TCP congestion control kfunc from modules
2021-10-05 17:07:41 -07:00
tcp_bic.c
…
tcp_bpf.c
bpf, sockmap: Fix return codes from tcp_bpf_recvmsg_parser()
2022-01-05 20:43:08 +01:00
tcp_cdg.c
…
tcp_cong.c
net: Only allow init netns to set default tcp cong to a restricted algo
2021-05-04 11:58:28 -07:00
tcp_cubic.c
tcp_cubic: fix spurious Hystart ACK train detections for not-cwnd-limited flows
2021-11-24 17:26:05 -08:00
tcp_dctcp.c
bpf: Enable TCP congestion control kfunc from modules
2021-10-05 17:07:41 -07:00
tcp_dctcp.h
…
tcp_diag.c
…
tcp_fastopen.c
net/ipv4/tcp_fastopen.c: remove superfluous header files from tcp_fastopen.c
2021-09-20 13:09:06 +01:00
tcp_highspeed.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_htcp.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_hybla.c
…
tcp_illinois.c
…
tcp_input.c
tcp: add missing tcp_skb_can_collapse() test in tcp_shift_skb_data()
2022-02-02 16:22:37 -08:00
tcp_ipv4.c
Networking fixes for 5.17-rc2, including fixes from netfilter and can.
2022-01-27 20:58:39 +02:00
tcp_lp.c
ipv4: tcp_lp.c: Couple of typo fixes
2021-03-28 17:31:13 -07:00
tcp_metrics.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
tcp_minisocks.c
tcp: fix another uninit-value (sk_rx_queue_mapping)
2021-12-03 14:15:49 +00:00
tcp_nv.c
net/ipv4/tcp_nv.c: remove superfluous header files from tcp_nv.c
2021-09-27 12:47:39 +01:00
tcp_offload.c
net: move gro definitions to include/net/gro.h
2021-11-16 13:16:54 +00:00
tcp_output.c
Revert "net: snmp: add statistics for tcp small queue check"
2021-12-01 19:06:09 -08:00
tcp_rate.c
tcp: tracking packets with CE marks in BW rate sample
2021-09-24 14:16:40 +01:00
tcp_recovery.c
tcp: more accurately check DSACKs to grow RACK reordering window
2021-07-27 20:07:21 +01:00
tcp_scalable.c
net: ipv4: delete repeated words
2020-08-24 17:31:20 -07:00
tcp_timer.c
net: sock: introduce sk_error_report
2021-06-29 11:28:21 -07:00
tcp_ulp.c
…
tcp_vegas.c
tcp: use semicolons rather than commas to separate statements
2020-10-13 17:11:52 -07:00
tcp_vegas.h
…
tcp_veno.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_westwood.c
…
tcp_yeah.c
tcp_yeah: check struct yeah size at compile time
2021-06-29 11:54:36 -07:00
tcp.c
tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case
2022-02-04 20:07:12 -08:00
tunnel4.c
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
udp_bpf.c
net: Implement ->sock_is_readable() for UDP and AF_UNIX
2021-10-26 12:29:33 -07:00
udp_diag.c
net: Use nlmsg_unicast() instead of netlink_unicast()
2021-07-13 09:28:29 -07:00
udp_impl.h
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
udp_offload.c
gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers
2021-11-24 17:21:42 -08:00
udp_tunnel_core.c
net/ipv4/udp_tunnel_core.c: remove superfluous header files from udp_tunnel_core.c
2021-09-21 10:17:20 +01:00
udp_tunnel_nic.c
udp_tunnel: Fix udp_tunnel_nic work-queue type
2021-09-13 12:38:45 +01:00
udp_tunnel_stub.c
udp_tunnel: add central NIC RX port offload infrastructure
2020-07-10 13:54:00 -07:00
udp.c
proc: remove PDE_DATA() completely
2022-01-22 08:33:37 +02:00
udplite.c
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
xfrm4_input.c
…
xfrm4_output.c
xfrm: fix unused variable warning if CONFIG_NETFILTER=n
2020-05-11 15:12:27 +02:00
xfrm4_policy.c
xfrm: use net device refcount tracker helpers
2021-12-09 11:51:45 -08:00
xfrm4_protocol.c
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
xfrm4_state.c
…
xfrm4_tunnel.c
net/ipv4/xfrm4_tunnel.c: remove superfluous header files from xfrm4_tunnel.c
2021-09-23 10:10:00 +02:00