memory leak in reg_copy

memory leak in reg_copy_regd
Status: upstream: reported C repro on 2021/07/22 06:12
Reported-by: syzbot+1638e7c770eef6b6c0d0@syzkaller.appspotmail.com
Fix commit: e53e9828a8d2 cfg80211: always free wiphy specific regdomain
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 184d, last: 184d

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/07/26 09:42	16m	mudongliangabcd@gmail.com	patch	upstream	OK
2021/07/26 09:32	3m	mudongliangabcd@gmail.com	patch	upstream	error
2021/07/26 07:22	6m	mudongliangabcd@gmail.com	patch	upstream	error
2021/07/22 15:07	14m	mudongliangabcd@gmail.com	patch	upstream	OK
2021/07/22 07:53	3m	mudongliangabcd@gmail.com	patch	upstream	error
2021/07/22 07:21	3m	mudongliangabcd@gmail.com	patch	upstream	error

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888111969200 (size 512):
  comm "syz-executor817", pid 8828, jiffies 4294955311 (age 19.340s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    05 00 00 00 39 39 00 00 00 00 00 00 d0 a6 24 00  ....99........$.
  backtrace:
    [<ffffffff83e971f0>] kmalloc include/linux/slab.h:596 [inline]
    [<ffffffff83e971f0>] kzalloc include/linux/slab.h:721 [inline]
    [<ffffffff83e971f0>] reg_copy_regd+0x30/0x120 net/wireless/reg.c:444
    [<ffffffff83e98e21>] wiphy_apply_custom_regulatory+0x101/0x1a0 net/wireless/reg.c:2582
    [<ffffffff82b31e27>] mac80211_hwsim_new_radio+0x897/0x1300 drivers/net/wireless/mac80211_hwsim.c:3344
    [<ffffffff82b32cb5>] hwsim_new_radio_nl+0x425/0x5f0 drivers/net/wireless/mac80211_hwsim.c:3924
    [<ffffffff83867aa3>] genl_family_rcv_msg_doit+0x113/0x180 net/netlink/genetlink.c:739
    [<ffffffff83868184>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
    [<ffffffff83868184>] genl_rcv_msg+0x174/0x2c0 net/netlink/genetlink.c:800
    [<ffffffff83866857>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2504
    [<ffffffff83867164>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
    [<ffffffff83865a42>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
    [<ffffffff83865a42>] netlink_unicast+0x392/0x4c0 net/netlink/af_netlink.c:1340
    [<ffffffff83865edb>] netlink_sendmsg+0x36b/0x6b0 net/netlink/af_netlink.c:1929
    [<ffffffff836cf446>] sock_sendmsg_nosec net/socket.c:703 [inline]
    [<ffffffff836cf446>] sock_sendmsg+0x56/0x80 net/socket.c:723
    [<ffffffff836cf9ac>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2392
    [<ffffffff836d39fb>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2446
    [<ffffffff836d3af8>] __sys_sendmsg+0x88/0x100 net/socket.c:2475
    [<ffffffff843af915>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff843af915>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Crashes (1):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-gce-leak	2021/07/18 06:02	upstream	d980cc0620ae	f115ae98	.config	log	report	syz	C		memory leak in reg_copy_regd