2021-02-01 05:36:33

by syzbot

[permalink] [raw]
Subject: WARNING in sta_info_insert_check

Hello,

syzbot found the following issue on:

HEAD commit: bec4c296 Merge tag 'ecryptfs-5.11-rc6-setxattr-fix' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11991778d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=f75d66d6d359ef2f
dashboard link: https://syzkaller.appspot.com/bug?extid=8dcc087eb24227ded47e
userspace arch: arm64

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: [email protected]

------------[ cut here ]------------
WARNING: CPU: 0 PID: 118 at net/mac80211/sta_info.c:547 sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
Modules linked in:
CPU: 0 PID: 118 Comm: kworker/u4:3 Not tainted 5.11.0-rc5-syzkaller-00239-gbec4c2968fce #0
Hardware name: linux,dummy-virt (DT)
Workqueue: phy6 ieee80211_iface_work
pstate: 40400009 (nZcv daif +PAN -UAO -TCO BTYPE=--)
pc : sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
lr : sta_info_insert_rcu+0x34/0x90 net/mac80211/sta_info.c:725
sp : ffff800013f3bbf0
x29: ffff800013f3bbf0 x28: ffff8000132e4538
x27: f6ff00002070c998 x26: dead000000000100
x25: dead000000000122 x24: f6ff00002070d340
x23: f6ff00002070d280 x22: faff000020710800
x21: faff000020710df0 x20: f6ff00002070c940
x19: f7ff000020784000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000
x15: 0000ad1062c19046 x14: f7ff000020796098
x13: 000000000000044b x12: f6ff00002070c940
x11: 000000000000000c x10: 0000000000000000
x9 : faff000020713b90 x8 : 0000000000000fff
x7 : 0000000000000000 x6 : f6ff00002070c940
x5 : 0000000000000fff x4 : 0000000000000000
x3 : 0000000000000100 x2 : 00000000ffeeffff
x1 : 00000000ffffffff x0 : 00000000ffeefdf7
Call trace:
sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
sta_info_insert_rcu+0x34/0x90 net/mac80211/sta_info.c:725
ieee80211_ibss_finish_sta+0x84/0x140 net/mac80211/ibss.c:592
ieee80211_ibss_work+0xe4/0x560 net/mac80211/ibss.c:1700
ieee80211_iface_work+0x2b8/0x33c net/mac80211/iface.c:1445
process_one_work+0x1d8/0x360 kernel/workqueue.c:2275
worker_thread+0x74/0x440 kernel/workqueue.c:2421
kthread+0x178/0x180 kernel/kthread.c:292
ret_from_fork+0x10/0x30 arch/arm64/kernel/entry.S:958


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2021-02-01 09:13:59

by Johannes Berg

[permalink] [raw]
Subject: Re: WARNING in sta_info_insert_check

On Sun, 2021-01-31 at 21:26 -0800, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: bec4c296 Merge tag 'ecryptfs-5.11-rc6-setxattr-fix' of git..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11991778d00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f75d66d6d359ef2f
> dashboard link: https://syzkaller.appspot.com/bug?extid=8dcc087eb24227ded47e
> userspace arch: arm64
>
> 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: [email protected]

Looks like this is a dup.

#syz dup: WARNING in sta_info_insert_rcu

Just in this case sta_info_insert_check() didn't get inlined into
sta_info_insert_rcu().

johannes