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| author | Sebastian Ott <sebott@redhat.com> | 2023-09-29 19:19:41 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-06 23:11:38 +0200 |
| commit | e0f81ab1e4f42ffece6440dc78f583eb352b9a71 (patch) | |
| tree | e1dd4a6ade832ee3794efcfd2f6713e6d0863b20 /mm/page_reporting.h | |
| parent | mm/mempolicy: fix set_mempolicy_home_node() previous VMA pointer (diff) | |
| download | linux-e0f81ab1e4f42ffece6440dc78f583eb352b9a71.tar.xz linux-e0f81ab1e4f42ffece6440dc78f583eb352b9a71.zip | |
mm: fix vm_brk_flags() to not bail out while holding lock
Calling vm_brk_flags() with flags set other than VM_EXEC will exit the
function without releasing the mmap_write_lock.
Just do the sanity check before the lock is acquired. This doesn't fix an
actual issue since no caller sets a flag other than VM_EXEC.
Link: https://lkml.kernel.org/r/20230929171937.work.697-kees@kernel.org
Fixes: 2e7ce7d354f2 ("mm/mmap: change do_brk_flags() to expand existing VMA and add do_brk_munmap()")
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_reporting.h')
0 files changed, 0 insertions, 0 deletions