The patch titled Subject: mm: /proc/pid/smaps_rollup: fix no vma's null-deref has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-proc-pid-smaps_rollup-fix-no-vmas-null-deref.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Seth Jenkins sethjenkins@google.com Subject: mm: /proc/pid/smaps_rollup: fix no vma's null-deref Date: Mon, 3 Oct 2022 18:45:31 -0400

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.

Link: https://lkml.kernel.org/r/20221003224531.1930646-1-sethjenkins@google.com 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 Cc: Jann Horn jannh@google.com Cc: Vlastimil Babka vbabka@suse.cz Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/task_mmu.c~mm-proc-pid-smaps_rollup-fix-no-vmas-null-deref +++ a/fs/proc/task_mmu.c @@ -969,7 +969,7 @@ static int show_smaps_rollup(struct seq_ vma = vma->vm_next; }

- show_vma_header_prefix(m, priv->mm->mmap->vm_start, + show_vma_header_prefix(m, priv->mm->mmap ? priv->mm->mmap->vm_start : 0, last_vma_end, 0, 0, 0, 0); seq_pad(m, ' '); seq_puts(m, "[rollup]\n"); _

Patches currently in -mm which might be from sethjenkins@google.com are

mm-proc-pid-smaps_rollup-fix-no-vmas-null-deref.patch