linux-kernel - [syzbot] KMSAN: uninit-value in ieee80211_sta_tx

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Date:   Sat, 20 Nov 2021 04:17:16 -0800
From:   syzbot <syzbot+614e82b88a1a4973e534@...kaller.appspotmail.com>
To:     davem@...emloft.net, glider@...gle.com, 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] KMSAN: uninit-value in ieee80211_sta_tx_notify (2)

Hello,

syzbot found the following issue on:

HEAD commit:    412af9cd936d ioremap.c: move an #include around
git tree:       https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=14d990eeb00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2d142cdf4204061
dashboard link: https://syzkaller.appspot.com/bug?extid=614e82b88a1a4973e534
compiler:       clang version 14.0.0 (git@...hub.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+614e82b88a1a4973e534@...kaller.appspotmail.com

=====================================================
BUG: KMSAN: uninit-value in ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
 ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
 ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_tx_status_ext+0x11f0/0x54d0 net/mac80211/status.c:1147
 ieee80211_tx_status+0x221/0x270 net/mac80211/status.c:1090
 ieee80211_tasklet_handler+0x30d/0x380 net/mac80211/main.c:239
 tasklet_action_common+0x5dd/0x810 kernel/softirq.c:783
 tasklet_action+0x30/0x40 kernel/softirq.c:804
 __do_softirq+0x1c9/0x6ec kernel/softirq.c:558
 do_softirq+0x120/0x1c0 kernel/softirq.c:459
 __local_bh_enable_ip+0xab/0xb0 kernel/softirq.c:383
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 __ieee80211_tx_skb_tid_band+0x297/0x3a0 net/mac80211/tx.c:5672
 ieee80211_tx_skb_tid net/mac80211/ieee80211_i.h:2185 [inline]
 ieee80211_tx_skb net/mac80211/ieee80211_i.h:2194 [inline]
 ieee80211_send_nullfunc+0x535/0x630 net/mac80211/mlme.c:1095
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3227 [inline]
 __kmalloc_node_track_caller+0xa3b/0x13c0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x4db/0xe40 net/core/skbuff.c:427
 __netdev_alloc_skb+0x48f/0x840 net/core/skbuff.c:494
 netdev_alloc_skb include/linux/skbuff.h:2877 [inline]
 dev_alloc_skb include/linux/skbuff.h:2890 [inline]
 ieee80211_nullfunc_get+0x2c1/0x870 net/mac80211/tx.c:5386
 ieee80211_send_nullfunc+0x132/0x630 net/mac80211/mlme.c:1077
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
 ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
 ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_tx_status_ext+0x11f0/0x54d0 net/mac80211/status.c:1147
 ieee80211_tx_status+0x221/0x270 net/mac80211/status.c:1090
 ieee80211_tasklet_handler+0x30d/0x380 net/mac80211/main.c:239
 tasklet_action_common+0x5dd/0x810 kernel/softirq.c:783
 tasklet_action+0x30/0x40 kernel/softirq.c:804
 __do_softirq+0x1c9/0x6ec kernel/softirq.c:558
 do_softirq+0x120/0x1c0 kernel/softirq.c:459
 __local_bh_enable_ip+0xab/0xb0 kernel/softirq.c:383
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 __ieee80211_tx_skb_tid_band+0x297/0x3a0 net/mac80211/tx.c:5672
 ieee80211_tx_skb_tid net/mac80211/ieee80211_i.h:2185 [inline]
 ieee80211_tx_skb net/mac80211/ieee80211_i.h:2194 [inline]
 ieee80211_send_nullfunc+0x535/0x630 net/mac80211/mlme.c:1095
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3227 [inline]
 __kmalloc_node_track_caller+0xa3b/0x13c0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x4db/0xe40 net/core/skbuff.c:427
 __netdev_alloc_skb+0x48f/0x840 net/core/skbuff.c:494
 netdev_alloc_skb include/linux/skbuff.h:2877 [inline]
 dev_alloc_skb include/linux/skbuff.h:2890 [inline]
 ieee80211_nullfunc_get+0x2c1/0x870 net/mac80211/tx.c:5386
 ieee80211_send_nullfunc+0x132/0x630 net/mac80211/mlme.c:1077
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
BUG: KMSAN: uninit-value in ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_ac_from_tid net/mac80211/ieee80211_i.h:2216 [inline]
 ieee80211_sta_tx_wmm_ac_notify net/mac80211/mlme.c:2450 [inline]
 ieee80211_sta_tx_notify+0x3b8/0x950 net/mac80211/mlme.c:2482
 ieee80211_tx_status_ext+0x11f0/0x54d0 net/mac80211/status.c:1147
 ieee80211_tx_status+0x221/0x270 net/mac80211/status.c:1090
 ieee80211_tasklet_handler+0x30d/0x380 net/mac80211/main.c:239
 tasklet_action_common+0x5dd/0x810 kernel/softirq.c:783
 tasklet_action+0x30/0x40 kernel/softirq.c:804
 __do_softirq+0x1c9/0x6ec kernel/softirq.c:558
 do_softirq+0x120/0x1c0 kernel/softirq.c:459
 __local_bh_enable_ip+0xab/0xb0 kernel/softirq.c:383
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 __ieee80211_tx_skb_tid_band+0x297/0x3a0 net/mac80211/tx.c:5672
 ieee80211_tx_skb_tid net/mac80211/ieee80211_i.h:2185 [inline]
 ieee80211_tx_skb net/mac80211/ieee80211_i.h:2194 [inline]
 ieee80211_send_nullfunc+0x535/0x630 net/mac80211/mlme.c:1095
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3227 [inline]
 __kmalloc_node_track_caller+0xa3b/0x13c0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x4db/0xe40 net/core/skbuff.c:427
 __netdev_alloc_skb+0x48f/0x840 net/core/skbuff.c:494
 netdev_alloc_skb include/linux/skbuff.h:2877 [inline]
 dev_alloc_skb include/linux/skbuff.h:2890 [inline]
 ieee80211_nullfunc_get+0x2c1/0x870 net/mac80211/tx.c:5386
 ieee80211_send_nullfunc+0x132/0x630 net/mac80211/mlme.c:1077
 ieee80211_mgd_probe_ap_send+0x6e7/0xa30 net/mac80211/mlme.c:2544
 ieee80211_mgd_probe_ap+0x4ee/0x6c0 net/mac80211/mlme.c:2620
 ieee80211_beacon_connection_loss_work+0x1a3/0x420 net/mac80211/mlme.c:2753
 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
 kthread+0x66b/0x780 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
=====================================================


---
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