Subject mm: fix UAF caused by race between ptdump and vmap pgtable freeing
Author ljs@kernel.org
Date 2026-07-12 10:42:24 +0000 UTC
Version
Cc akpm@linux-foundation.org bp@alien8.de bpf@vger.kernel.org catalin.marinas@arm.com dave.hansen@linux.intel.com david@kernel.org dev.jain@arm.com devnexen@gmail.com hpa@zytor.com kas@kernel.org liam@infradead.org linux-arm-kernel@lists.infradead.org linux-kernel@vger.kernel.org linux-mm@kvack.org ljs@kernel.org luto@kernel.org mhocko@suse.com mingo@redhat.com peterz@infradead.org rppt@kernel.org ryan.roberts@arm.com shakeel.butt@linux.dev stable@vger.kernel.org surenb@google.com syzbot@syzkaller.appspotmail.com tglx@kernel.org toshi.kani@hpe.com urezki@gmail.com vbabka@kernel.org will@kernel.org x86@kernel.org
Patches (4)
Name Content [All]
[PATCH mm-hotfixes v2 1/4] mm/vmalloc: acquire init_mm lock on huge vmap to avoid ptdump UAF [Body]
[PATCH mm-hotfixes v2 2/4] x86/mm/pat: acquire mmap lock on page table free to avoid ptdump UAF [Body]
[PATCH mm-hotfixes v2 3/4] mm/ptdump: always stabilise against page table freeing using init_mm [Body]
[PATCH mm-hotfixes v2 4/4] arm64: remove redundant concurrent ptdump UAF mitigation [Body]
Session 2026-07-12
ID (for dev) a482f02e-fa76-4cd9-b539-66e845419b0d
Status finished
Triaged OK [Log] [Trajectory]
Execution Log [Link]
Test Base Patched Verdict
[KASAN] Build Base 44696aa3a489d2baf58efa61b37833f100072bee [Config] passed [Log]
[KASAN] Boot test: Base 44696aa3a489d2baf58efa61b37833f100072bee [Config] passed [Log]
[KASAN] Build Patched 44696aa3a489d2baf58efa61b37833f100072bee [Config] [patched] passed [Log]
[KASAN] Boot test: Patched 44696aa3a489d2baf58efa61b37833f100072bee [Config] [patched] passed [Log]
[KASAN] Fuzz 44696aa3a489d2baf58efa61b37833f100072bee [Config] 44696aa3a489d2baf58efa61b37833f100072bee [Config] [patched] passed [Log] [Artifacts]