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linux/net/core
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Eric Dumazet f3c4961054 rtnetlink: use dev_isalive() in rtnl_getlink() 
rtnl_getlink() uses an RCU lookup to get the netdevice pointer.

When/If rtnl_lock() is used, we should check if the netdevice is not
being dismantled before potentially perform illegal actions.

Move dev_isalive() out of net/core/net-sysfs.c and make it available
in net/core/dev.h.

Return -ENODEV if rtnl_getlink() finds a device which is currently
being dismantled and RTNL is requested.

Fixes: e896e5c073 ("rtnetlink: do not acquire RTNL in rtnl_getlink() with RTEXT_FILTER_NAME_ONLY")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Link: https://patch.msgid.link/20260603180831.1024716-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-06-04 18:16:14 -07:00
..
bpf_sk_storage.c bpf: Fix sk_local_storage diag dumping uninitialized special fields 2026-04-24 11:21:34 -07:00
datagram.c net: datagram: introduce datagram_poll_queue for custom receive queues 2025-10-23 15:46:04 +02:00
dev_addr_lists_test.c net: cache snapshot entries for ndo_set_rx_mode_async 2026-04-21 12:50:13 +02:00
dev_addr_lists.c net: rename netdev_ops_assert_locked() 2026-06-04 14:04:55 -07:00
dev_api.c net: introduce ndo_set_rx_mode_async and netdev_rx_mode_work 2026-04-21 12:50:03 +02:00
dev_ioctl.c net: introduce ndo_set_rx_mode_async and netdev_rx_mode_work 2026-04-21 12:50:03 +02:00
dev.c net: rename netdev_ops_assert_locked() 2026-06-04 14:04:55 -07:00
dev.h rtnetlink: use dev_isalive() in rtnl_getlink() 2026-06-04 18:16:14 -07:00
devmem.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-05-21 15:09:02 -07:00
devmem.h net: devmem: support TX over NETMEM_TX_NO_DMA devices 2026-05-18 18:49:06 -07:00
drop_monitor.c net: constify sk_skb_reason_drop() sock parameter 2026-05-12 18:31:11 -07:00
dst_cache.c net: dst: annotate data-races around dst->obsolete 2025-07-02 14:32:29 -07:00
dst.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
failover.c net: net_failover: Fix the deadlock in slave register 2026-05-13 19:01:03 -07:00
fib_notifier.c net: Add SPDX ids to some source files 2026-03-09 18:32:45 -07:00
fib_rules.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-04-17 12:26:50 -07:00
filter.c bpf: sockmap: fix tail fragment offset in bpf_msg_push_data 2026-05-29 12:38:35 -07:00
flow_dissector.c flow_dissector: do not dissect PPPoE PFC frames 2026-04-20 11:35:16 -07:00
flow_offload.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
gen_estimator.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
gen_stats.c net/sched: add const qualifiers to gnet_stats helpers 2026-05-11 18:28:08 -07:00
gro_cells.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
gro.c net: gro: don't merge zcopy skbs 2026-05-21 08:21:33 -07:00
gso.c net: introduce struct net_hotdata 2024-03-07 21:12:41 -08:00
hotdata.c net: remove EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() macros 2026-03-29 11:21:22 -07:00
hwbm.c
ieee8021q_helpers.c net: ieee8021q: fix insufficient table-size assertion 2025-07-01 12:55:49 +02:00
link_watch.c net: rename netdev_ops_assert_locked() 2026-06-04 14:04:55 -07:00
lock_debug.c net: document NETDEV_CHANGENAME as ops locked 2026-06-04 14:04:55 -07:00
lwt_bpf.c bpf: remove ipv6_bpf_stub completely and use direct function calls 2026-03-29 11:21:24 -07:00
lwtunnel.c inet: Remove rtnl_is_held arg of lwtunnel_valid_encap_type(_attr)?(). 2025-05-20 19:18:24 -07:00
Makefile net: get rid of net/core/request_sock.c 2026-02-05 09:23:05 -08:00
mp_dmabuf_devmem.h memory-provider: dmabuf devmem memory provider 2024-09-11 20:44:31 -07:00
neighbour.c neigh: let neigh_xmit take skb ownership 2026-04-27 19:02:11 -07:00
net_namespace.c Networking changes for 7.1. 2026-04-14 18:36:10 -07:00
net_test.c pfcp: always set pfcp metadata 2024-04-01 10:49:28 +01:00
net-procfs.c net: add proper RCU protection to /proc/net/ptype 2026-02-03 19:20:30 -08:00
net-sysfs.c rtnetlink: use dev_isalive() in rtnl_getlink() 2026-06-04 18:16:14 -07:00
net-sysfs.h net: add skb_defer_disable_key static key 2026-03-12 19:25:33 -07:00
net-traces.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
netclassid_cgroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
netdev_config.c net: add queue config validation callback 2026-01-23 11:49:02 -08:00
netdev_queues.c net: rename netdev_ops_assert_locked() 2026-06-04 14:04:55 -07:00
netdev_rx_queue.c net: Rename ifq_idx to rxq_idx in netif_mp_* helpers 2026-04-12 09:12:07 -07:00
netdev-genl-gen.c net: page_pool: support dumping pps of a specific ifindex via Netlink 2026-05-08 14:54:55 -07:00
netdev-genl-gen.h net: Add queue-create operation 2026-04-09 18:21:45 -07:00
netdev-genl.c net: devmem: support TX over NETMEM_TX_NO_DMA devices 2026-05-18 18:49:06 -07:00
netevent.c
netmem_priv.h Revert "mm: introduce a new page type for page pool in page type" 2026-05-21 19:06:13 -07:00
netpoll.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-05-21 15:09:02 -07:00
netprio_cgroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
of_net.c net: Explicitly include correct DT includes 2023-07-27 20:33:16 -07:00
page_pool_priv.h net: page_pool: don't try to stash the napi id 2025-01-27 14:37:41 -08:00
page_pool_user.c net: make page_pool_get_stats() void 2026-05-28 18:10:03 -07:00
page_pool.c net: make page_pool_get_stats() void 2026-05-28 18:10:03 -07:00
pktgen.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
ptp_classifier.c
rtnetlink.c rtnetlink: use dev_isalive() in rtnl_getlink() 2026-06-04 18:16:14 -07:00
scm.c net: use ktime_t in struct scm_timestamping_internal 2026-03-04 17:53:34 -08:00
secure_seq.c tcp: secure_seq: add back ports to TS offset 2026-03-04 17:44:35 -08:00
selftests.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
skb_fault_injection.c net: Implement fault injection forcing skb reallocation 2024-11-12 12:05:33 +01:00
skbuff.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-01 13:42:12 +02:00
skmsg.c bpf, skmsg: fix verdict sk_data_ready racing with ktls rx 2026-05-20 17:21:21 -07:00
sock_diag.c net: Add SPDX ids to some source files 2026-03-09 18:32:45 -07:00
sock_map.c sockmap: Fix sk_psock_drop() race vs sock_map_{unhash,close,destroy}(). 2026-04-23 18:24:02 -07:00
sock_reuseport.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
sock.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-04 15:29:04 -07:00
stream.c net: stream: add description for sk_stream_write_space() 2025-07-18 16:57:21 -07:00
sysctl_net_core.c net: add skb_defer_disable_key static key 2026-03-12 19:25:33 -07:00
timestamping.c net: Add the possibility to support a selected hwtstamp in netdevice 2024-12-16 12:51:40 +00:00
tso.c net: tso: Introduce tso_dma_map and helpers 2026-04-12 10:54:31 -07:00
utils.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
xdp.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00