Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space

From	mc36 <csmate@nop.hu>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space
Date	2025-10-21 17:40 +0200
Message-ID	<LImCR-6T1k-11@gated-at.bofh.it> (permalink)
References	(4 earlier) <LI5LH-6HIS-1@gated-at.bofh.it> <LImCR-6T1k-13@gated-at.bofh.it> <LImCR-6T1k-15@gated-at.bofh.it> <LHJBv-6stc-1@gated-at.bofh.it> <LImCR-6T1k-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

Show all headers | View raw

hi,

On 10/21/25 16:47, Maciej Fijalkowski wrote:

> However, I do not understand why setting mac addr on one veth interface
> triggers this path.
> 

just my 10 cents but imho i saw a check for promisc while walking through the call

stack's small epsilon surroundings, maybe there is a for-us check somewhere earlier?

recall that we're setting the interface hw-address to the packet's destination mac...

br,

cs

Back to linux.debian.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-20 06:50 +0200
  Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space Jason Xing <kerneljasonxing@gmail.com> - 2025-10-20 08:50 +0200
    Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-20 09:20 +0200
    Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-20 11:00 +0200
      Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space Jason Xing <kerneljasonxing@gmail.com> - 2025-10-20 11:10 +0200
        Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-20 12:00 +0200
        Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-20 23:40 +0200
          Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-21 15:10 +0200
            Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-21 15:50 +0200
          Bug#1118437: null pointer dereference in interrupt after receiving an ip packet on veth from xsk from user space mc36 <csmate@nop.hu> - 2025-10-21 17:40 +0200

csiph-web