CVE-2025-38109

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix ECVF vports unload on shutdown flow

Fix shutdown flow UAF when a virtual function is created on the embedded chip (ECVF) of a BlueField device. In such case the vport acl ingress table is not properly destroyed.

ECVF functionality is independent of ecpfvportexists capability and thus functions mlx5eswitch(enable|disable)pfvf_vports() should not test it when enabling/disabling ECVF vports.

kernel log: [] refcount_t: underflow; use-after-free. [] WARNING: CPU: 3 PID: 1 at lib/refcount.c:28

refcountwarnsaturate+0x124/0x220

[] Call trace: [] refcountwarnsaturate+0x124/0x220 [] treeputnode+0x164/0x1e0 [mlx5core] [] mlx5destroyflowtable+0x98/0x2c0 [mlx5core] [] eswaclingresstabledestroy+0x28/0x40 [mlx5core] [] eswaclingresslgcycleanup+0x80/0xf4 [mlx5core] [] eswlegacyvportaclcleanup+0x44/0x60 [mlx5core] [] eswvportcleanup+0x64/0x90 [mlx5core] [] mlx5eswvportdisable+0xc0/0x1d0 [mlx5core] [] mlx5eswitchunloadecvfvports+0xcc/0x150 [mlx5core] [] mlx5eswitchdisablesriov+0x198/0x2a0 [mlx5core] [] mlx5devicedisablesriov+0xb8/0x1e0 [mlx5core] [] mlx5sriovdetach+0x40/0x50 [mlx5core] [] mlx5unload+0x40/0xc4 [mlx5core] [] mlx5unloadonedevllocked+0x6c/0xe4 [mlx5core] [] mlx5unloadone+0x3c/0x60 [mlx5core] [] shutdown+0x7c/0xa4 [mlx5core] [] pcideviceshutdown+0x3c/0xa0 [] deviceshutdown+0x170/0x340 [] _dosysreboot+0x1f4/0x2a0 [] _arm64sysreboot+0x2c/0x40 [] invokesyscall+0x78/0x100 [] el0svccommon.constprop.0+0x54/0x184 [] doel0svc+0x30/0xac [] el0svc+0x48/0x160 [] el0t64synchandler+0xa4/0x12c [] el0t64_sync+0x1a4/0x1a8 [] --[ end trace 9c4601d68c70030e ]---