Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:bnxt_en: Fix memory corruption when FW resources change during ifdownbnxt_set_dflt_rings() assumes that it is always called before any TC hasbeen created. So it doesn't take bp->num_tc into account and assumesthat it is always 0 or 1.In the FW resource or capability change scenario, the FW will returnflags in bnxt_hwrm_if_change() that will cause the driver toreinitialize and call bnxt_cancel_reservations(). This will lead tobnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp->num_tcmay be greater than 1. This will cause bp->tx_ring[] to be sized toosmall and cause memory corruption in bnxt_alloc_cp_rings().Fix it by properly scaling the TX rings by bp->num_tc in the codepaths mentioned above. Add 2 helper functions to determinebp->tx_nr_rings and bp->tx_nr_rings_per_tc.
No PoCs from references.
- https://github.com/w4zu/Debian_security