CVE-2025-21675: In the Linux kernel, the following vulnerability has been resolved:  net/mlx5: Clear port select structure when fail to create  Clear the port select structure on error so no stale values left after definers are destroyed. That's because the mlx5_lag_destroy_definers() always try to destroy all lag definers in the tt_map, so in the flow below lag definers get double-destroyed and cause kernel crash:    mlx5_lag_port_sel_create()     mlx5_lag_create_definers()       mlx5_lag_create_definer()     <- Failed on tt 1         mlx5_lag_destroy_definers() <- definers[tt=0] gets destroyed   mlx5_lag_port_sel_create()     mlx5_lag_create_definers()       mlx5_lag_create_definer()     <- Failed on tt 0         mlx5_lag_destroy_definers() <- definers[tt=0] gets double-destroyed   Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008  Mem abort info:    ESR = 0x0000000096000005    EC = 0x25: DABT (current EL), IL = 32 bits    SET = 0, FnV = 0    EA = 0, S1PTW = 0    FSC = 0x05: level 1 translation fault  Data abort info:    ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000    CM = 0, WnR = 0, TnD = 0, TagAccess = 0    GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0  user pgtable: 64k pages, 48-bit VAs, pgdp=0000000112ce2e00  [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000  Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP  Modules linked in: iptable_raw bonding ip_gre ip6_gre gre ip6_tunnel tunnel6 geneve ip6_udp_tunnel udp_tunnel ipip tunnel4 ip_tunnel rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) ib_uverbs(OE) mlx5_fwctl(OE) fwctl(OE) mlx5_core(OE) mlxdevm(OE) ib_core(OE) mlxfw(OE) memtrack(OE) mlx_compat(OE) openvswitch nsh nf_conncount psample xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc netconsole overlay efi_pstore sch_fq_codel zram ip_tables crct10dif_ce qemu_fw_cfg fuse ipv6 crc_ccitt [last unloaded: mlx_compat(OE)]   CPU: 3 UID: 0 PID: 217 Comm: kworker/u53:2 Tainted: G           OE      6.11.0+ #2   Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE   Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015   Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core]   pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)   pc : mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]   lr : mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]   sp : ffff800085fafb00   x29: ffff800085fafb00 x28: ffff0000da0c8000 x27: 0000000000000000   x26: ffff0000da0c8000 x25: ffff0000da0c8000 x24: ffff0000da0c8000   x23: ffff0000c31f81a0 x22: 0400000000000000 x21: ffff0000da0c8000   x20: 0000000000000000 x19: 0000000000000001 x18: 0000000000000000   x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff8b0c9350   x14: 0000000000000000 x13: ffff800081390d18 x12: ffff800081dc3cc0   x11: 0000000000000001 x10: 0000000000000b10 x9 : ffff80007ab7304c   x8 : ffff0000d00711f0 x7 : 0000000000000004 x6 : 0000000000000190   x5 : ffff00027edb3010 x4 : 0000000000000000 x3 : 0000000000000000   x2 : ffff0000d39b8000 x1 : ffff0000d39b8000 x0 : 0400000000000000   Call trace:    mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]    mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]    mlx5_lag_destroy_definers+0xa0/0x108 [mlx5_core]    mlx5_lag_port_sel_create+0x2d4/0x6f8 [mlx5_core]    mlx5_activate_lag+0x60c/0x6f8 [mlx5_core]    mlx5_do_bond_work+0x284/0x5c8 [mlx5_core]    process_one_work+0x170/0x3e0    worker_thread+0x2d8/0x3e0    kthread+0x11c/0x128    ret_from_fork+0x10/0x20   Code: a9025bf5 aa0003f6 a90363f7 f90023f9 (f9400400)   ---[ end trace 0000000000000000 ]---