Andrew, can you pick up this patch? On 2019/07/01 19:52, Tetsuo Handa wrote: > Andrew, can you pick up this patch? We might miss next merge window, for > Eric Biederman seems to be offline for two weeks. > > On 2019/06/14 19:16, Tetsuo Handa wrote: >> syzbot found that a thread can stall for minutes inside kexec_load() after >> that thread was killed by SIGKILL [1]. It turned out that the reproducer >> was trying to allocate 2408MB of memory using kimage_alloc_page() from >> kimage_load_normal_segment(). Let's check for SIGKILL before doing memory >> allocation. >> >> [1] https://syzkaller.appspot.com/bug?id=a0e3436829698d5824231251fad9d8e998f94f5e >> >> Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> >> Reported-by: syzbot <syzbot+8ab2d0f39fb79fe6ca40@xxxxxxxxxxxxxxxxxxxxxxxxx> >> --- >> kernel/kexec_core.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c >> index fd5c95f..2b25d95 100644 >> --- a/kernel/kexec_core.c >> +++ b/kernel/kexec_core.c >> @@ -302,6 +302,8 @@ static struct page *kimage_alloc_pages(gfp_t gfp_mask, unsigned int order) >> { >> struct page *pages; >> >> + if (fatal_signal_pending(current)) >> + return NULL; >> pages = alloc_pages(gfp_mask & ~__GFP_ZERO, order); >> if (pages) { >> unsigned int count, i; >> > _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
