Andrew, can you pick up this patch? No response from Laura Abbott nor Sumit Semwal.
On 2019/06/21 18:58, Tetsuo Handa wrote: > From e0758655727044753399fb4f7c5f3eb25ac5cccd Mon Sep 17 00:00:00 2001 > From: Tetsuo Handa <[email protected]> > Date: Fri, 21 Jun 2019 11:22:51 +0900 > Subject: [PATCH] staging: android: ion: Bail out upon SIGKILL when allocating > memory. > > syzbot found that a thread can stall for minutes inside > ion_system_heap_allocate() after that thread was killed by SIGKILL [1]. > Let's check for SIGKILL before doing memory allocation. > > [1] > https://syzkaller.appspot.com/bug?id=a0e3436829698d5824231251fad9d8e998f94f5e > > Signed-off-by: Tetsuo Handa <[email protected]> > Reported-by: syzbot <[email protected]> > --- > drivers/staging/android/ion/ion_page_pool.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/staging/android/ion/ion_page_pool.c > b/drivers/staging/android/ion/ion_page_pool.c > index fd4995fb676e..f85ec5b16b65 100644 > --- a/drivers/staging/android/ion/ion_page_pool.c > +++ b/drivers/staging/android/ion/ion_page_pool.c > @@ -8,11 +8,14 @@ > #include <linux/list.h> > #include <linux/slab.h> > #include <linux/swap.h> > +#include <linux/sched/signal.h> > > #include "ion.h" > > static inline struct page *ion_page_pool_alloc_pages(struct ion_page_pool > *pool) > { > + if (fatal_signal_pending(current)) > + return NULL; > return alloc_pages(pool->gfp_mask, pool->order); > } > >
