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reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607090088 On 7/9/26 16:16, Paolo Abeni wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On 7/9/26 8:56 AM, Yun Zhou wrote: >> erspan_xmit() re-enters the network stack via ip_tunnel_xmit(), causing >> nested acquisition of _xmit_lock on the underlay device while already >> holding the ERSPAN device's _xmit_lock. Both are ARPHRD_ETHER and share >> the same lockdep class, creating an ABBA deadlock: >> >> sch_direct_xmit [lock erspan] -> erspan_xmit -> ip_tunnel_xmit -> >> ip_output -> __dev_queue_xmit -> sch_direct_xmit [lock underlay] >> >> Set dev->lltx = true so HARD_TX_LOCK() skips the spinlock for ERSPAN. >> This is safe as erspan_xmit() has no shared mutable state: o_seqno is >> atomic, stats use atomic_long_inc, and dst_cache is per-CPU. GRETAP, >> the sibling device with identical xmit structure, already sets lltx. >> >> Closes: https://syzkaller.appspot.com/bug?extid=9bda1b9fbb7fbdf9b62b >> Reported-by: syzbot+9bda1b9fbb7fbdf9b62b@syzkaller.appspotmail.com >> Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") >> Signed-off-by: Yun Zhou > So this is actually a v2 of: > > 20260630183702.170798-2-hemendranaik@gmail.com/20260630183702.170798-2-hemendranaik@gmail.com/ > > right? > > please have a look at: > > https://elixir.bootlin.com/linux/v7.1/source/Documentation/process/maintainer-netdev.rst#L434 > > any kind of re-submission matters, no matter how trivial is the reason. > > /P > I sincerely apologize for the duplicate patch submission. It was a minor oversight caused by a misconfigured Git in my new environment. However, it seems this email was sent to hemendranaik@gmail.com, right? BR, Yun