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Hajime Tazaki authored
When deleting a vma entry from a maple tree, it has to pass NULL to vma_iter_prealloc() in order to calculate internal state of the tree, but it passed a wrong argument. As a result, nommu kernels crashed upon accessing a vma iterator, such as acct_collect() reading the size of vma entries after do_munmap(). This commit fixes this issue by passing a right argument to the preallocation call. Link: https://lkml.kernel.org/r/20241108222834.3625217-1-thehajime@gmail.com Fixes: b5df0922 ("mm: set up vma iterator for vma_iter_prealloc() calls") Signed-off-by:
Hajime Tazaki <thehajime@gmail.com> Reviewed-by:
Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org>
Hajime Tazaki authoredWhen deleting a vma entry from a maple tree, it has to pass NULL to vma_iter_prealloc() in order to calculate internal state of the tree, but it passed a wrong argument. As a result, nommu kernels crashed upon accessing a vma iterator, such as acct_collect() reading the size of vma entries after do_munmap(). This commit fixes this issue by passing a right argument to the preallocation call. Link: https://lkml.kernel.org/r/20241108222834.3625217-1-thehajime@gmail.com Fixes: b5df0922 ("mm: set up vma iterator for vma_iter_prealloc() calls") Signed-off-by:
