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netdev: fix double-free in netdev_nl_bind_rx_doit()

In the Linux kernel, the following vulnerability has been resolved: netdev: fix double-free in netdev_nl_bind_rx_doit() Sashiko flags that genlmsg_reply() always consumes the skb. The error path calls nlmsg_free(rsp) so we can't jump directly to it. Let's not unbind, just propagate the error to the user. This is the typical way of handling genlmsg_reply() failures. They shouldn't happen unless user does something silly like calling the kernel with an already-full rcvbuf.

Affected products

Linux
  • <e055ca9205d3eb6aec3e5fe4ecc18abbbf18c599
  • <9b019376cbee10c4f9184d1745fa37d156e36f30
  • =<6.18.*
  • ==6.12
  • <c299321bc6232770ce378d6fa6bc46004d2d7fdb
  • <c849de7d8757a7af801fc4a4058f71d481d367f2
  • =<6.12.*
  • =<7.0.*
  • <6.12
  • =<*