netdev - [syzbot] memory leak in reg_copy

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Date:   Wed, 21 Jul 2021 23:12:17 -0700
From:   syzbot <syzbot+1638e7c770eef6b6c0d0@...kaller.appspotmail.com>
To:     davem@...emloft.net, johannes@...solutions.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] memory leak in reg_copy_regd

Hello,

syzbot found the following issue on:

HEAD commit:    d980cc0620ae Merge tag 'devicetree-fixes-for-5.14-1' of gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=142c634a300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7280943fd0476e5a
dashboard link: https://syzkaller.appspot.com/bug?extid=1638e7c770eef6b6c0d0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=131de45a300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=118cea5c300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1638e7c770eef6b6c0d0@...kaller.appspotmail.com

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



---
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