Re: [PATCH stable 4.19-5.19] mm: /proc/pid/smaps_rollup: fix no vma's null-deref

On Thu, Oct 27, 2022 at 11:36:52AM -0400, Seth Jenkins wrote:

Commit 258f669e7e88 ("mm: /proc/pid/smaps_rollup: convert to single value seq_file") introduced a null-deref if there are no vma's in the task in show_smaps_rollup.

Fixes: 258f669e7e88 ("mm: /proc/pid/smaps_rollup: convert to single value seq_file") Signed-off-by: Seth Jenkins sethjenkins@google.com Reviewed-by: Alexey Dobriyan adobriyan@gmail.com Tested-by: Alexey Dobriyan adobriyan@gmail.com

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c4c84f06285e on upstream resolves this issue as part of the switch to using maple trees for VMA lookups, but a fix must still be applied to stable trees 4.19-5.19.

Now queued up, thanks.

greg k-h