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

calipso: fix memory leak in netlbl_calipso_add_pass()

If IPv6 support is disabled at boot (ipv6.disable=1),
the calipso_init() -> netlbl_calipso_ops_register() function isn't called,
and the netlbl_calipso_ops_get() function always returns NULL.
In this case, the netlbl_calipso_add_pass() function allocates memory
for the doi_def variable but doesn't free it with the calipso_doi_free().

BUG: memory leak
unreferenced object 0xffff888011d68180 (size 64):
  comm "syz-executor.1", pid 10746, jiffies 4295410986 (age 17.928s)
  hex dump (first 32 bytes):
    00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<...>] kmalloc include/linux/slab.h:552 [inline]
    [<...>] netlbl_calipso_add_pass net/netlabel/netlabel_calipso.c:76 [inline]
    [<...>] netlbl_calipso_add+0x22e/0x4f0 net/netlabel/netlabel_calipso.c:111
    [<...>] genl_family_rcv_msg_doit+0x22f/0x330 net/netlink/genetlink.c:739
    [<...>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
    [<...>] genl_rcv_msg+0x341/0x5a0 net/netlink/genetlink.c:800
    [<...>] netlink_rcv_skb+0x14d/0x440 net/netlink/af_netlink.c:2515
    [<...>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:811
    [<...>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
    [<...>] netlink_unicast+0x54b/0x800 net/netlink/af_netlink.c:1339
    [<...>] netlink_sendmsg+0x90a/0xdf0 net/netlink/af_netlink.c:1934
    [<...>] sock_sendmsg_nosec net/socket.c:651 [inline]
    [<...>] sock_sendmsg+0x157/0x190 net/socket.c:671
    [<...>] ____sys_sendmsg+0x712/0x870 net/socket.c:2342
    [<...>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2396
    [<...>] __sys_sendmsg+0xea/0x1b0 net/socket.c:2429
    [<...>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46
    [<...>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with Syzkaller

[PM: merged via the LSM tree at Jakub Kicinski request]

kernel.org https://git.kernel.org/stable/c/321b3a5592c8a9d6b654c7c64833ea67dbb33149 [No types assigned]

kernel.org https://git.kernel.org/stable/c/36e19f84634aaa94f543fedc0a07588949638d53 [No types assigned]

kernel.org https://git.kernel.org/stable/c/408bbd1e1746fe33e51f4c81c2febd7d3841d031 [No types assigned]

kernel.org https://git.kernel.org/stable/c/44a88650ba55e6a7f2ec485d2c2413ba7e216f01 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9a8f811a146aa2a0230f8edb2e9f4b6609aab8da [No types assigned]

kernel.org https://git.kernel.org/stable/c/a4529a08d3704c17ea9c7277d180e46b99250ded [No types assigned]

kernel.org https://git.kernel.org/stable/c/ec4e9d630a64df500641892f4e259e8149594a99 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f14d36e6e97fe935a20e0ceb159c100f90b6627c [No types assigned]