linux-kernel - Re: [syzbot] [bpf?] possible deadlock in queue_stack_map_push

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Message-ID: <67f95599.050a0220.2c5fcf.0005.GAE@google.com>
Date: Fri, 11 Apr 2025 10:47:05 -0700
From: syzbot <syzbot+252bc5c744d0bba917e1@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, memxor@...il.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bpf?] possible deadlock in queue_stack_map_push_elem

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
unregister_netdevice: waiting for DEV to become free

unregister_netdevice: waiting for batadv0 to become free. Usage count = 3


Tested on:

commit:         e403941b bpf: Convert ringbuf.c to rqspinlock
git tree:       https://github.com/kkdwivedi/linux.git res-lock-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16b68a3f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ea2b297a0891c87e
dashboard link: https://syzkaller.appspot.com/bug?extid=252bc5c744d0bba917e1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.