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Message-ID: <026ada86847b6f5a9f89cf005b5d75d035ff6a19.camel@sipsolutions.net> Date: Sun, 02 Oct 2022 22:02:28 +0200 From: Johannes Berg <johannes@...solutions.net> To: syzbot <syzbot+4ef359e6b423499fa4e1@...kaller.appspotmail.com>, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac 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@...kaller.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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