5.5

CVE-2023-53190

vxlan: Fix memory leaks in error path

In the Linux kernel, the following vulnerability has been resolved:

vxlan: Fix memory leaks in error path

The memory allocated by vxlan_vnigroup_init() is not freed in the error
path, leading to memory leaks [1]. Fix by calling
vxlan_vnigroup_uninit() in the error path.

The leaks can be reproduced by annotating gro_cells_init() with
ALLOW_ERROR_INJECTION() and then running:

 # echo "100" > /sys/kernel/debug/fail_function/probability
 # echo "1" > /sys/kernel/debug/fail_function/times
 # echo "gro_cells_init" > /sys/kernel/debug/fail_function/inject
 # printf %#x -12 > /sys/kernel/debug/fail_function/gro_cells_init/retval
 # ip link add name vxlan0 type vxlan dstport 4789 external vnifilter
 RTNETLINK answers: Cannot allocate memory

[1]
unreferenced object 0xffff88810db84a00 (size 512):
  comm "ip", pid 330, jiffies 4295010045 (age 66.016s)
  hex dump (first 32 bytes):
    f8 d5 76 0e 81 88 ff ff 01 00 00 00 00 00 00 02  ..v.............
    03 00 04 00 48 00 00 00 00 00 00 01 04 00 01 00  ....H...........
  backtrace:
    [<ffffffff81a3097a>] kmalloc_trace+0x2a/0x60
    [<ffffffff82f049fc>] vxlan_vnigroup_init+0x4c/0x160
    [<ffffffff82ecd69e>] vxlan_init+0x1ae/0x280
    [<ffffffff836858ca>] register_netdevice+0x57a/0x16d0
    [<ffffffff82ef67b7>] __vxlan_dev_create+0x7c7/0xa50
    [<ffffffff82ef6ce6>] vxlan_newlink+0xd6/0x130
    [<ffffffff836d02ab>] __rtnl_newlink+0x112b/0x18a0
    [<ffffffff836d0a8c>] rtnl_newlink+0x6c/0xa0
    [<ffffffff836c0ddf>] rtnetlink_rcv_msg+0x43f/0xd40
    [<ffffffff83908ce0>] netlink_rcv_skb+0x170/0x440
    [<ffffffff839066af>] netlink_unicast+0x53f/0x810
    [<ffffffff839072d8>] netlink_sendmsg+0x958/0xe70
    [<ffffffff835c319f>] ____sys_sendmsg+0x78f/0xa90
    [<ffffffff835cd6da>] ___sys_sendmsg+0x13a/0x1e0
    [<ffffffff835cd94c>] __sys_sendmsg+0x11c/0x1f0
    [<ffffffff8424da78>] do_syscall_64+0x38/0x80
unreferenced object 0xffff88810e76d5f8 (size 192):
  comm "ip", pid 330, jiffies 4295010045 (age 66.016s)
  hex dump (first 32 bytes):
    04 00 00 00 00 00 00 00 db e1 4f e7 00 00 00 00  ..........O.....
    08 d6 76 0e 81 88 ff ff 08 d6 76 0e 81 88 ff ff  ..v.......v.....
  backtrace:
    [<ffffffff81a3162e>] __kmalloc_node+0x4e/0x90
    [<ffffffff81a0e166>] kvmalloc_node+0xa6/0x1f0
    [<ffffffff8276e1a3>] bucket_table_alloc.isra.0+0x83/0x460
    [<ffffffff8276f18b>] rhashtable_init+0x43b/0x7c0
    [<ffffffff82f04a1c>] vxlan_vnigroup_init+0x6c/0x160
    [<ffffffff82ecd69e>] vxlan_init+0x1ae/0x280
    [<ffffffff836858ca>] register_netdevice+0x57a/0x16d0
    [<ffffffff82ef67b7>] __vxlan_dev_create+0x7c7/0xa50
    [<ffffffff82ef6ce6>] vxlan_newlink+0xd6/0x130
    [<ffffffff836d02ab>] __rtnl_newlink+0x112b/0x18a0
    [<ffffffff836d0a8c>] rtnl_newlink+0x6c/0xa0
    [<ffffffff836c0ddf>] rtnetlink_rcv_msg+0x43f/0xd40
    [<ffffffff83908ce0>] netlink_rcv_skb+0x170/0x440
    [<ffffffff839066af>] netlink_unicast+0x53f/0x810
    [<ffffffff839072d8>] netlink_sendmsg+0x958/0xe70
    [<ffffffff835c319f>] ____sys_sendmsg+0x78f/0xa90
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.18 < 6.0.19
Linux ≫ Linux Kernel Version >= 6.1 < 6.1.5
Linux ≫ Linux Kernel Version6.2 Updaterc1
Linux ≫ Linux Kernel Version6.2 Updaterc2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.057
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/75c1ab900f7cf0485f0be1607c79c55f51faaa90
Patch
https://git.kernel.org/stable/c/5896f55810680391a32652ca2b91245a05c11e22
Patch
https://git.kernel.org/stable/c/06bf62944144a92d83dd14fd1378d2a288259561
Patch