CVE-2025-38569

Published: August 21, 2025Last modified: August 21, 2025

Description

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> __iommu_dma_free+0xe8/0x1c0 be_cmd_set_mac_list+0x3fe/0x640 [be2net] be_cmd_set_mac+0xaf/0x110 [be2net] be_vf_eth_addr_config+0x19f/0x330 [be2net] be_vf_setup+0x4f7/0x990 [be2net] be_pci_sriov_configure+0x3a1/0x470 [be2net] sriov_numvfs_store+0x20b/0x380 kernfs_fop_write_iter+0x354/0x530 vfs_write+0x9b9/0xf60 ksys_write+0xf3/0x1d0 do_syscall_64+0x8c/0x3d0 be_cmd_set_mac_list() calls dma_free_coherent() under a spin_lock_bh. Fix it by freeing only after the lock has been released.

Status

References

• https://git.kernel.org/stable/c/0ddfe8b127ef1149fddccb79db6e6eaba7738e7d
• https://git.kernel.org/stable/c/3697e37e012bbd2bb5a5b467689811ba097b2eff
• https://git.kernel.org/stable/c/46d44a23a3723a89deeb65b13cddb17f8d9f2700
• https://git.kernel.org/stable/c/5a40f8af2ba1b9bdf46e2db10e8c9710538fbc63
• https://git.kernel.org/stable/c/975e73b9102d844a3dc3f091ad631c56145c8b4c
• https://git.kernel.org/stable/c/c377ba2be9430d165a98e4b782902ed630bc7546
• https://git.kernel.org/stable/c/d5dc09ee5d74277bc47193fe28ce8703e229331b
• https://git.kernel.org/stable/c/f4e4e0c4bc4d799d6fa39055acdbc3af066cd13e
• https://git.kernel.org/stable/c/f80b34ebc579216407b128e9d155bfcae875c30f