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    SubjectRe: [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac
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    On Sat, 2022-10-01 at 07:26 -0700, syzbot wrote:
    > Hello,
    >
    > syzbot found the following issue on:
    >
    > HEAD commit: 6627a2074d5c net/smc: Support SO_REUSEPORT
    > git tree: net-next
    > console output: https://syzkaller.appspot.com/x/log.txt?x=10183a70880000
    > kernel config: https://syzkaller.appspot.com/x/.config?x=d4d64087513b5aa1
    > dashboard link: https://syzkaller.appspot.com/bug?extid=4ef359e6b423499fa4e1
    > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
    >
    > Unfortunately, I don't have any reproducer for this issue yet.
    >
    > Downloadable assets:
    > disk image: https://storage.googleapis.com/syzbot-assets/9ecb75606956/disk-6627a207.raw.xz
    > vmlinux: https://storage.googleapis.com/syzbot-assets/1073865fcb40/vmlinux-6627a207.xz
    >
    > IMPORTANT: if you fix the issue, please add the following tag to the commit:
    > Reported-by: syzbot+4ef359e6b423499fa4e1@syzkaller.appspotmail.com
    >
    > ================================================
    > WARNING: lock held when returning to user space!
    > 6.0.0-rc6-syzkaller-01407-g6627a2074d5c #0 Not tainted
    > ------------------------------------------------
    > syz-executor.3/10164 is leaving the kernel with locks still held!
    > 1 lock held by syz-executor.3/10164:
    > #0: ffff888147acaa88 (&local->mtx){+.+.}-{3:3}, at: ieee80211_can_powered_addr_change net/mac80211/iface.c:217 [inline]
    > #0: ffff888147acaa88 (&local->mtx){+.+.}-{3:3}, at: ieee80211_change_mac+0x9b4/0xf40 net/mac80211/iface.c:264
    >

    Uh, right. Pretty sure this will fix it once I merge it:

    https://patchwork.kernel.org/project/linux-wireless/patch/Yx9LJFA7PDSRmb/M@kili/

    johannes

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