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Tue, 08 Dec 2020 18:03:11 -0800 (PST) Date: Tue, 08 Dec 2020 18:03:11 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000015e0c705b5fe7627@google.com> Subject: WARNING in ieee80211_start_next_roc From: syzbot To: davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: e87297fa Merge tag 'drm-fixes-2020-12-04' of git://anongit.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17d9c9d3500000 kernel config: https://syzkaller.appspot.com/x/.config?x=e49433cfed49b7d9 dashboard link: https://syzkaller.appspot.com/bug?extid=c3a167b5615df4ccd7fb compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=171f77e3500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1603469b500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c3a167b5615df4ccd7fb@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8533 at net/mac80211/offchannel.c:401 ieee80211_start_next_roc+0x1f4/0x240 net/mac80211/offchannel.c:401 Modules linked in: CPU: 1 PID: 8533 Comm: kworker/u4:1 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy4 ieee80211_scan_work RIP: 0010:ieee80211_start_next_roc+0x1f4/0x240 net/mac80211/offchannel.c:401 Code: d0 21 00 00 48 89 ef 48 89 c2 e8 77 7f 0b 00 5b 5d e9 d0 f4 28 f9 e8 cb f4 28 f9 48 89 ef e8 c3 73 ff ff eb 8d e8 bc f4 28 f9 <0f> 0b eb 84 48 c7 c7 9c df ec 8c e8 1c 73 6a f9 e9 2f fe ff ff e8 RSP: 0018:ffffc9000167fb80 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff88470edd RDX: ffff88801f861a40 RSI: ffffffff88470fc4 RDI: 0000000000000001 RBP: ffff8880292c0c80 R08: 0000000000000001 R09: ffffffff8ebaf727 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880292c25b8 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff0e86f950 CR3: 000000001d954000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ieee80211_scan_completed+0x602/0xed0 net/mac80211/scan.c:477 ieee80211_scan_work+0x3dd/0x1a90 net/mac80211/scan.c:1119 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches