linux-kernel - [syzbot] memory leak in cfg80211_inform_single_bss_frame

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Date:   Wed, 02 Jun 2021 09:37:27 -0700
From:   syzbot <syzbot+7a942657a255a9d9b18a@...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 cfg80211_inform_single_bss_frame_data

Hello,

syzbot found the following issue on:

HEAD commit:    b90e90f4 Merge branch 'i2c/for-current' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13bd382fd00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b8c23f7848d1c696
dashboard link: https://syzkaller.appspot.com/bug?extid=7a942657a255a9d9b18a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=131ce883d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7a942657a255a9d9b18a@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888119584780 (size 96):
  comm "kworker/u4:0", pid 8670, jiffies 4295047890 (age 8.810s)
  hex dump (first 32 bytes):
    fd f0 0a 3d 90 c3 05 00 00 00 00 00 00 00 00 00  ...=............
    00 00 00 00 00 00 00 00 28 00 00 00 01 00 06 10  ........(.......
  backtrace:
    [<ffffffff83e52709>] cfg80211_inform_single_bss_frame_data+0x139/0x640 net/wireless/scan.c:2376
    [<ffffffff83e52c5b>] cfg80211_inform_bss_frame_data+0x4b/0x470 net/wireless/scan.c:2437
    [<ffffffff83ef1d43>] ieee80211_bss_info_update+0x183/0x470 net/mac80211/scan.c:190
    [<ffffffff83eff43b>] ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline]
    [<ffffffff83eff43b>] ieee80211_rx_mgmt_probe_beacon+0x60b/0x950 net/mac80211/ibss.c:1615
    [<ffffffff83effe8c>] ieee80211_ibss_rx_queued_mgmt+0x23c/0x6e0 net/mac80211/ibss.c:1642
    [<ffffffff83f01d76>] ieee80211_iface_work+0x476/0x5f0 net/mac80211/iface.c:1437
    [<ffffffff8125f9d9>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2276
    [<ffffffff812602c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff81267bf8>] kthread+0x178/0x1b0 kernel/kthread.c:313
    [<ffffffff810022ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff888119584680 (size 96):
  comm "kworker/u4:0", pid 8670, jiffies 4295048012 (age 7.590s)
  hex dump (first 32 bytes):
    f4 b0 1d 3d 90 c3 05 00 00 00 00 00 00 00 00 00  ...=............
    00 00 00 00 00 00 00 00 28 00 00 00 01 00 06 10  ........(.......
  backtrace:
    [<ffffffff83e52709>] cfg80211_inform_single_bss_frame_data+0x139/0x640 net/wireless/scan.c:2376
    [<ffffffff83e52c5b>] cfg80211_inform_bss_frame_data+0x4b/0x470 net/wireless/scan.c:2437
    [<ffffffff83ef1d43>] ieee80211_bss_info_update+0x183/0x470 net/mac80211/scan.c:190
    [<ffffffff83eff43b>] ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline]
    [<ffffffff83eff43b>] ieee80211_rx_mgmt_probe_beacon+0x60b/0x950 net/mac80211/ibss.c:1615
    [<ffffffff83effe8c>] ieee80211_ibss_rx_queued_mgmt+0x23c/0x6e0 net/mac80211/ibss.c:1642
    [<ffffffff83f01d76>] ieee80211_iface_work+0x476/0x5f0 net/mac80211/iface.c:1437
    [<ffffffff8125f9d9>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2276
    [<ffffffff812602c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff81267bf8>] kthread+0x178/0x1b0 kernel/kthread.c:313
    [<ffffffff810022ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff888119584400 (size 96):
  comm "kworker/u4:0", pid 8670, jiffies 4295048012 (age 7.590s)
  hex dump (first 32 bytes):
    f5 b0 1d 3d 90 c3 05 00 00 00 00 00 00 00 00 00  ...=............
    00 00 00 00 00 00 00 00 28 00 00 00 01 00 06 10  ........(.......
  backtrace:
    [<ffffffff83e52709>] cfg80211_inform_single_bss_frame_data+0x139/0x640 net/wireless/scan.c:2376
    [<ffffffff83e52c5b>] cfg80211_inform_bss_frame_data+0x4b/0x470 net/wireless/scan.c:2437
    [<ffffffff83ef1d43>] ieee80211_bss_info_update+0x183/0x470 net/mac80211/scan.c:190
    [<ffffffff83eff43b>] ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline]
    [<ffffffff83eff43b>] ieee80211_rx_mgmt_probe_beacon+0x60b/0x950 net/mac80211/ibss.c:1615
    [<ffffffff83effe8c>] ieee80211_ibss_rx_queued_mgmt+0x23c/0x6e0 net/mac80211/ibss.c:1642
    [<ffffffff83f01d76>] ieee80211_iface_work+0x476/0x5f0 net/mac80211/iface.c:1437
    [<ffffffff8125f9d9>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2276
    [<ffffffff812602c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff81267bf8>] kthread+0x178/0x1b0 kernel/kthread.c:313
    [<ffffffff810022ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff8881196dda80 (size 96):
  comm "kworker/u4:1", pid 8689, jiffies 4295048023 (age 7.480s)
  hex dump (first 32 bytes):
    e4 40 1f 3d 90 c3 05 00 00 00 00 00 00 00 00 00  .@..............
    00 00 00 00 00 00 00 00 28 00 00 00 01 00 06 10  ........(.......
  backtrace:
    [<ffffffff83e52709>] cfg80211_inform_single_bss_frame_data+0x139/0x640 net/wireless/scan.c:2376
    [<ffffffff83e52c5b>] cfg80211_inform_bss_frame_data+0x4b/0x470 net/wireless/scan.c:2437
    [<ffffffff83ef1d43>] ieee80211_bss_info_update+0x183/0x470 net/mac80211/scan.c:190
    [<ffffffff83eff43b>] ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline]
    [<ffffffff83eff43b>] ieee80211_rx_mgmt_probe_beacon+0x60b/0x950 net/mac80211/ibss.c:1615
    [<ffffffff83effe8c>] ieee80211_ibss_rx_queued_mgmt+0x23c/0x6e0 net/mac80211/ibss.c:1642
    [<ffffffff83f01d76>] ieee80211_iface_work+0x476/0x5f0 net/mac80211/iface.c:1437
    [<ffffffff8125f9d9>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2276
    [<ffffffff812602c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff81267bf8>] kthread+0x178/0x1b0 kernel/kthread.c:313
    [<ffffffff810022ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294



---
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