Hi Richard, On Mon, Aug 01, 2011 at 15:41 +0200, Richard Weinberger wrote: > 5774ed01 (shm: handle separate PID namespaces case) > b34a6b1d (ipc: introduce shm_rmid_forced sysctl) > 4c677e2e (shm: optimize locking and ipc_namespace getting) > > broke UML on i386. > It crashes while starting up by SIGSEGV. > exit_shm() seems to be the evil doer.
I was reported 20 mins ago that it's reproducable on MIPS too. > Reverting all three patches make UML work again. Can you confirm that 5774ed01 breaks the boot? (it is for MIPS) > Commit 5774ed01 removed the !ns->shm_rmid_forced check, maybe this is wrong? No, it's not the reason. > ---cut--- > #13 0x08067efb in hard_handler (sig=11) at > arch/um/os-Linux/sys-i386/signal.c:12 > #14 <signal handler called> > #15 __list_add (sem=0x824cc98, subclass=0) at include/linux/list.h:44 > #16 list_add_tail (sem=0x824cc98, subclass=0) at include/linux/list.h:76 > #17 __down_write_nested (sem=0x824cc98, subclass=0) at > lib/rwsem-spinlock.c:232 > #18 0x081c7ba1 in __down_write (sem=0x824cc98) at lib/rwsem-spinlock.c:252 > #19 0x081c74a3 in down_write (sem=0x824cc98) at kernel/rwsem.c:51 > #20 0x08139913 in exit_shm (task=0x9c73b60) at ipc/shm.c:308 > #21 0x08075649 in do_exit (code=0) at kernel/exit.c:983 > #22 0x08081dd2 in ____call_usermodehelper (data=0x9c6bce0) at > kernel/kmod.c:187 > #23 0x08065c18 in run_kernel_thread (fn=0x8081ce4 <____call_usermodehelper>, > arg=0x9c6bce0, > jmp_ptr=0x9c73d94) > at arch/um/os-Linux/process.c:268 > #24 0x080588cb in new_thread_handler () at arch/um/kernel/process.c:153 > #25 0x00000000 in ?? () > ---cut--- Can you post the whole oops message? I'd want to see what pointer is NULL. Thanks, -- Vasiliy Kulikov http://www.openwall.com - bringing security into open computing environments ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
