On Fri, 29 Jan 2016 15:13:47 +0100 Oleg Nesterov <o...@redhat.com> wrote:
> On 01/29, Dmitry Vyukov wrote: > > > > Hello, > > > > I've got the following WARNING while running syzkaller fuzzer: > > > > ------------[ cut here ]------------ > > WARNING: CPU: 2 PID: 10905 at ./arch/x86/include/asm/thread_info.h:236 > > sigsuspend+0x18e/0x1f0() > > Modules linked in: > > CPU: 2 PID: 10905 Comm: syz-executor Not tainted 4.5.0-rc1+ #300 > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > > 00000000ffffffff ffff88006139fe38 ffffffff82be118d 0000000000000000 > > ffff88006d054740 ffffffff867387e0 ffff88006139fe78 ffffffff813536d9 > > ffffffff813839ce ffffffff867387e0 00000000000000ec 0000000020000000 > > Call Trace: > > [< inline >] __dump_stack lib/dump_stack.c:15 > > [<ffffffff82be118d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50 > > [<ffffffff813536d9>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482 > > [<ffffffff81353909>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515 > > [< inline >] set_restore_sigmask > > ./arch/x86/include/asm/thread_info.h:236 > > [<ffffffff813839ce>] sigsuspend+0x18e/0x1f0 kernel/signal.c:3513 > > See http://marc.info/?t=145373722000004 the patch is already in -mm tree. I'll get this into 4.5 as we now appear to have some code which actually triggers it. I wonder where that wakeup is coming from.
