Re: [syzbot] [batman?] [mm?] [ext4?] INFO: rcu detected stall in rescuer_thread

From: syzbot
Date: Sun Dec 01 2024 - 18:16:13 EST


syzbot has bisected this issue to:

commit b3e40fc85735b787ce65909619fcd173107113c2
Author: Oliver Neukum <oneukum@xxxxxxxx>
Date: Thu May 2 11:51:40 2024 +0000

USB: usb_parse_endpoint: ignore reserved bits

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10553d30580000
start commit: cfaaa7d010d1 Merge tag 'net-6.12-rc8' of git://git.kernel...
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=12553d30580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14553d30580000
kernel config: https://syzkaller.appspot.com/x/.config?x=d2aeec8c0b2e420c
dashboard link: https://syzkaller.appspot.com/bug?extid=76e180c757e9d589a79d
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14486b5f980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=112182e8580000

Reported-by: syzbot+76e180c757e9d589a79d@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: b3e40fc85735 ("USB: usb_parse_endpoint: ignore reserved bits")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection