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I might > try to force it uninstalled anyway. > > Sorry to have to keep asking you to repro but for now the only way sadly :( > > Hopefully this final patch that I set should give us the final bits of > information we need, can't be sure though. > > This is certainly a very strange thing! I wonder whether a driver is > relying on old mmap() MAP_FIXED behaviour... I realise (being tired) I missed one thing... if you have a sec could you add this to the previously included patch? Thanks! Rather important, as this is the main munmap() entry point... Again, hugely appreciate all your help! ----8<---- >From 200301df3dbd1ca5b3ab2e9238af15602d72e839 Mon Sep 17 00:00:00 2001 From: Lorenzo Stoakes Date: Wed, 2 Oct 2024 22:09:21 +0100 Subject: [PATCH] munmap fix --- mm/mmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/mmap.c b/mm/mmap.c index 8a1d5c0da86f..68817f83263c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1658,6 +1658,8 @@ static int __vm_munmap(unsigned long start, size_t len, bool unlock) LIST_HEAD(uf); VMA_ITERATOR(vmi, mm, start); + ljs_dump(mm, start, start + len, 0, true); + if (mmap_write_lock_killable(mm)) return -EINTR; -- 2.46.2