* [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac
@ 2022-10-01 14:26 syzbot
2022-10-02 20:02 ` Johannes Berg
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2022-10-01 14:26 UTC (permalink / raw)
To: davem, edumazet, johannes, kuba, linux-kernel, linux-wireless,
netdev, pabeni, syzkaller-bugs
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@syzkaller.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
---
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac
2022-10-01 14:26 [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac syzbot
@ 2022-10-02 20:02 ` Johannes Berg
2022-10-03 8:00 ` Dmitry Vyukov
0 siblings, 1 reply; 3+ messages in thread
From: Johannes Berg @ 2022-10-02 20:02 UTC (permalink / raw)
To: syzbot, davem, edumazet, kuba, linux-kernel, linux-wireless,
netdev, pabeni, syzkaller-bugs
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@syzkaller.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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac
2022-10-02 20:02 ` Johannes Berg
@ 2022-10-03 8:00 ` Dmitry Vyukov
0 siblings, 0 replies; 3+ messages in thread
From: Dmitry Vyukov @ 2022-10-03 8:00 UTC (permalink / raw)
To: Johannes Berg
Cc: syzbot, davem, edumazet, kuba, linux-kernel, linux-wireless,
netdev, pabeni, syzkaller-bugs
On Sun, 2 Oct 2022 at 22:02, Johannes Berg <johannes@sipsolutions.net> wrote:
>
> 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@syzkaller.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
Let's tell syzbot about the fix:
#syz fix:
wifi: mac80211: unlock on error in ieee80211_can_powered_addr_change()
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-10-03 8:28 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-10-01 14:26 [syzbot] WARNING: lock held when returning to user space in ieee80211_change_mac syzbot
2022-10-02 20:02 ` Johannes Berg
2022-10-03 8:00 ` Dmitry Vyukov
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