Subject mm: fix UAF caused by race between ptdump and vmap pgtable freeing
Author ljs@kernel.org
Date 2026-07-16 21:31:12 +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 den@virtuozzo.com 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 v4 1/4] mm/vmalloc: acquire init_mm lock on huge vmap to avoid ptdump UAF [Body]
[PATCH mm-hotfixes v4 2/4] x86/mm/pat: acquire init_mm write lock to avoid UAF [Body]
[PATCH mm-hotfixes v4 3/4] mm/ptdump: always stabilise against page table freeing using init_mm [Body]
[PATCH mm-hotfixes v4 4/4] arm64: remove redundant concurrent ptdump UAF mitigation [Body]
Series Summary
Passed
✓ All tests passed. No findings.
Sessions
Session 2026-07-16
Passed
ID (for dev) ae464d32-0bf2-4a1f-9af1-4bc75a6b8186
Status finished
Triaged OK [Log] [Trajectory]
Execution Log [Link]
Test Base Patched Verdict
[KASAN] Build Base e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] passed [Log]
[KASAN] Boot test: Base e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] passed [Log]
[KASAN] Build Patched e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] [patched] passed [Log]
[KASAN] Boot test: Patched e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] [patched] passed [Log]
[KASAN] Fuzz e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] e22254e9ddd8020130c4b806b6b4aa77b09c2560 [Config] [patched] passed [Log] [Artifacts]