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Remi Pommarel 64453d60e6 batman-adv: Fix batadv_v_ogm_aggr_send memory leak 
commit 421d467dc2d483175bad4fb76a31b9e5a3d744cf upstream.

When batadv_v_ogm_aggr_send is called for an inactive interface, the skb
is silently dropped by batadv_v_ogm_send_to_if() but never freed causing
the following memory leak:

  unreferenced object 0xffff00000c164800 (size 512):
    comm "kworker/u8:1", pid 2648, jiffies 4295122303 (age 97.656s)
    hex dump (first 32 bytes):
      00 80 af 09 00 00 ff ff e1 09 00 00 75 01 60 83  ............u.`.
      1f 00 00 00 b8 00 00 00 15 00 05 00 da e3 d3 64  ...............d
    backtrace:
      [<0000000007ad20f6>] __kmalloc_track_caller+0x1a8/0x310
      [<00000000d1029e55>] kmalloc_reserve.constprop.0+0x70/0x13c
      [<000000008b9d4183>] __alloc_skb+0xec/0x1fc
      [<00000000c7af5051>] __netdev_alloc_skb+0x48/0x23c
      [<00000000642ee5f5>] batadv_v_ogm_aggr_send+0x50/0x36c
      [<0000000088660bd7>] batadv_v_ogm_aggr_work+0x24/0x40
      [<0000000042fc2606>] process_one_work+0x3b0/0x610
      [<000000002f2a0b1c>] worker_thread+0xa0/0x690
      [<0000000059fae5d4>] kthread+0x1fc/0x210
      [<000000000c587d3a>] ret_from_fork+0x10/0x20

Free the skb in that case to fix this leak.

Cc: stable@vger.kernel.org
Fixes: 0da0035942 ("batman-adv: OGMv2 - add basic infrastructure")
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-30 16:31:55 +02:00
..
bat_algo.c
bat_algo.h
bat_iv_ogm.c batman-adv: Avoid WARN_ON timing related checks 2021-06-30 08:48:15 -04:00
bat_iv_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bat_v.c
bat_v.h
bat_v_elp.c batman-adv: Do not get eth header before batadv_check_management_packet 2023-08-30 16:31:55 +02:00
bat_v_elp.h
bat_v_ogm.c batman-adv: Fix batadv_v_ogm_aggr_send memory leak 2023-08-30 16:31:55 +02:00
bat_v_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bitarray.c
bitarray.h
bridge_loop_avoidance.c net: batman-adv: fix error handling 2021-11-02 18:26:45 +01:00
bridge_loop_avoidance.h batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh 2020-10-01 13:14:52 +02:00
debugfs.c Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux 2018-07-20 21:17:12 -07:00
debugfs.h
distributed-arp-table.c batman-adv: Broken sync while rescheduling delayed work 2023-06-14 10:57:13 +02:00
distributed-arp-table.h
fragmentation.c batman-adv: Don't skb_split skbuffs with frag_list 2022-05-18 09:42:47 +02:00
fragmentation.h
gateway_client.c batman-adv: Avoid uninitialized chaddr when handling DHCP 2020-09-09 19:04:24 +02:00
gateway_client.h
gateway_common.c
gateway_common.h
hard-interface.c batman-adv: Don't increase MTU when set by user 2023-08-30 16:31:55 +02:00
hard-interface.h
hash.c
hash.h
icmp_socket.c
icmp_socket.h
Kconfig batman-adv: Remove "default n" in Kconfig 2018-06-23 10:30:06 +02:00
log.c batman-adv: set .owner to THIS_MODULE 2020-12-02 08:48:10 +01:00
log.h
main.c net: batman-adv: fix error handling 2021-11-02 18:26:45 +01:00
main.h batman-adv: Increase version number to 2018.3 2018-09-14 17:59:20 +02:00
Makefile
multicast.c batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN 2021-11-26 11:36:24 +01:00
multicast.h batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN 2021-11-26 11:36:24 +01:00
netlink.c batman-adv: fix uninit-value in batadv_netlink_get_ifindex() 2019-09-16 08:21:41 +02:00
netlink.h
network-coding.c net: batman-adv: fix error handling 2021-11-02 18:26:45 +01:00
network-coding.h
originator.c batman-adv: Join batadv_purge_orig_ref and _batadv_purge_orig 2018-07-07 22:02:17 +02:00
originator.h
routing.c batman-adv: mcast/TT: fix wrongly dropped or rerouted packets 2020-10-01 13:14:51 +02:00
routing.h
send.c
send.h
soft-interface.c batman-adv: Don't increase MTU when set by user 2023-08-30 16:31:55 +02:00
soft-interface.h
sysfs.c batman-adv: Fix refcnt leak in batadv_store_throughput_override 2020-05-14 07:57:22 +02:00
sysfs.h
tp_meter.c
tp_meter.h
translation-table.c batman-adv: Fix TT global entry leak when client roamed back 2023-08-30 16:31:55 +02:00
translation-table.h
tvlv.c batman-adv: Prevent duplicated tvlv handler 2018-09-06 14:37:13 +02:00
tvlv.h
types.h batman-adv: Don't increase MTU when set by user 2023-08-30 16:31:55 +02:00