[syzbot] [tomoyo?] INFO: rcu detected stall in security_file_ioctl (8)

[Eric Dumazet]

On Fri, Aug 2, 2024 at 5:07 AM syzbot
<syzbot+67defecaa74f7dd0a5d3 at syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit e634134180885574d1fe7aa162777ba41e7fcd5b
> Author: Vladimir Oltean <vladimir.oltean at nxp.com>
> Date:   Mon May 27 15:39:54 2024 +0000
>
>     net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16a9066d980000
> start commit:   0450d2083be6 Merge tag '6.10-rc-smb-fix' of git://git.samb..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=17ffd15f654c98ba
> dashboard link: https://syzkaller.appspot.com/bug?extid=67defecaa74f7dd0a5d3
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17109b3f180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10bcb2a4980000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

This seems legit, according to the repro.

#syz fix: net/sched: taprio: make q->picos_per_byte available to
fill_sched_entry()