CVE-2025-38569

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

benet: fix BUG when creating VFs

benet crashes as soon as SRIOV VFs are created:

kernel BUG at mm/vmalloc.c:3457! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 4 UID: 0 PID: 7408 Comm: test.sh Kdump: loaded Not tainted 6.16.0+ #1 PREEMPT(voluntary) [...] RIP: 0010:vunmap+0x5f/0x70 [...] Call Trace: <TASK> _iommudmafree+0xe8/0x1c0 becmdsetmaclist+0x3fe/0x640 [be2net] becmdsetmac+0xaf/0x110 [be2net] bevfethaddrconfig+0x19f/0x330 [be2net] bevfsetup+0x4f7/0x990 [be2net] bepcisriovconfigure+0x3a1/0x470 [be2net] sriovnumvfsstore+0x20b/0x380 kernfsfopwriteiter+0x354/0x530 vfswrite+0x9b9/0xf60 ksyswrite+0xf3/0x1d0 dosyscall64+0x8c/0x3d0

becmdsetmaclist() calls dmafreecoherent() under a spinlockbh. Fix it by freeing only after the lock has been released.