diff options
| author | Seth Jenkins <sethjenkins@google.com> | 2022-10-27 11:36:52 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-30 09:41:19 +0100 |
| commit | a50ed2d28727ff605d95fb9a53be8ff94e8eaaf4 (patch) | |
| tree | 582a5d35c7c69df262502970bd7f637fa06fe2fe | |
| parent | 31b1570677e8bf85f48be8eb95e21804399b8295 (diff) | |
mm: /proc/pid/smaps_rollup: fix no vma's null-deref
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/proc/task_mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index ef18f0d71b11..8b75a04836b6 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -951,7 +951,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v) 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"); |