Re: [PATCH stable-4.4 v3] coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
On Mon, Jun 17, 2019 at 08:58:24AM +0200, Michal Hocko wrote:
From: Andrea Arcangeli aarcange@redhat.com
Upstream 04f5866e41fb70690e28397487d8bd8eea7d712a commit.
Signed-off-by: Michal Hocko mhocko@suse.com
drivers/android/binder.c | 6 ++++++ drivers/infiniband/hw/mlx4/main.c | 3 +++ fs/proc/task_mmu.c | 18 ++++++++++++++++++ fs/userfaultfd.c | 10 ++++++++-- include/linux/mm.h | 21 +++++++++++++++++++++ mm/mmap.c | 7 ++++++- 6 files changed, 62 insertions(+), 3 deletions(-)
I've queued this up now, as it looks like everyone agrees with it. What about a 4.9.y backport?
Greg, it's here please review. https://lore.kernel.org/stable/1561208539-29682-1-git-send-email-akaher@vmwa...
Michal, patched for binder code Thanks, would you like to suggest if mmget_still_valid check require anywhere for khugepaged code.
thanks, greg k-h
On Sat 22-06-19 06:30:37, Ajay Kaher wrote:
On Mon, Jun 17, 2019 at 08:58:24AM +0200, Michal Hocko wrote:
From: Andrea Arcangeli aarcange@redhat.com
Upstream 04f5866e41fb70690e28397487d8bd8eea7d712a commit.
Signed-off-by: Michal Hocko mhocko@suse.com
drivers/android/binder.c | 6 ++++++ drivers/infiniband/hw/mlx4/main.c | 3 +++ fs/proc/task_mmu.c | 18 ++++++++++++++++++ fs/userfaultfd.c | 10 ++++++++-- include/linux/mm.h | 21 +++++++++++++++++++++ mm/mmap.c | 7 ++++++- 6 files changed, 62 insertions(+), 3 deletions(-)
I've queued this up now, as it looks like everyone agrees with it. What about a 4.9.y backport?
Greg, it's here please review. https://lore.kernel.org/stable/1561208539-29682-1-git-send-email-akaher@vmwa...
Michal, patched for binder code Thanks, would you like to suggest if mmget_still_valid check require anywhere for khugepaged code.
khugepaged patch has gone its own way. See 59ea6d06cfa9 ("coredump: fix race condition between collapse_huge_page() and core dumping")
linux-stable-mirror@lists.linaro.org
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Ajay Kaher -
Michal Hocko