On Fri, Jan 29, 2016 at 10:16 AM, Dmitry Vyukov <dvyu...@google.com> 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 > [< inline >] SYSC_rt_sigsuspend kernel/signal.c:3533 > [<ffffffff81387d7c>] SyS_rt_sigsuspend+0xac/0xe0 kernel/signal.c:3523 > [<ffffffff86653236>] entry_SYSCALL_64_fastpath+0x16/0x7a > arch/x86/entry/entry_64.S:185 > ---[ end trace da5c27e3b7defd96 ]--- > > Unfortunately I cannot reproduce it. But the only two programs that > contain rt_sigsuspend that were executed before the warning are: > https://gist.githubusercontent.com/dvyukov/cacf219b67de2aa08733/raw/de22347ab1ebd0c90dc7f8af9b348ba143b7ba6c/gistfile1.txt > https://gist.githubusercontent.com/dvyukov/2b419fac83636e7ba0e3/raw/0b32b477180f385d6430b2186f1e474c3bb5a829/gistfile1.txt > Note that most syscalls there are redherring, because I don't have > /dev/audio7 nor /dev/fd5. So ioctls are fail, and shmget also fails. > These programs call exit(0) and can SIGSEGV concurrently, though. > > I am on commit 92e963f50fc74041b5e9e744c330dca48e04f08d
+syzkaller group
