CVE-2024-26595

In the Linux kernel, the following vulnerability has been resolved: mlxsw:
spectrum_acl_tcam: Fix NULL pointer dereference in error path When calling
mlxsw_sp_acl_tcam_region_destroy() from an error path after failing to
attach the region to an ACL group, we hit a NULL pointer dereference upon
‘region->group->tcam’ [1]. Fix by retrieving the ‘tcam’ pointer using
mlxsw_sp_acl_to_tcam(). [1] BUG: kernel NULL pointer dereference, address:
0000000000000000 […] RIP: 0010:mlxsw_sp_acl_tcam_region_destroy+0xa0/0xd0
[…] Call Trace: mlxsw_sp_acl_tcam_vchunk_get+0x88b/0xa20
mlxsw_sp_acl_tcam_ventry_add+0x25/0xe0 mlxsw_sp_acl_rule_add+0x47/0x240
mlxsw_sp_flower_replace+0x1a9/0x1d0 tc_setup_cb_add+0xdc/0x1c0
fl_hw_replace_filter+0x146/0x1f0 fl_change+0xc17/0x1360
tc_new_tfilter+0x472/0xb90 rtnetlink_rcv_msg+0x313/0x3b0
netlink_rcv_skb+0x58/0x100 netlink_unicast+0x244/0x390
netlink_sendmsg+0x1e4/0x440 ____sys_sendmsg+0x164/0x260
___sys_sendmsg+0x9a/0xe0 __sys_sendmsg+0x7a/0xc0 do_syscall_64+0x40/0xe0
entry_SYSCALL_64_after_hwframe+0x63/0x6b

Notes