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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [x86_64, vsyscall] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
On Wed, Jul 30, 2014 at 07:58:13AM -0700, Andy Lutomirski wrote: > On Wed, Jul 30, 2014 at 7:29 AM, Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote: > > Greetings, > > > > 0day kernel testing robot got the below dmesg and the first bad commit is > > > > git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/vsyscall > > commit 442aba0c6131f0c41dfc5edb6bfb88335556523f > > Author: Andy Lutomirski <luto@xxxxxxxxxxxxxx> > > AuthorDate: Mon Jun 16 18:50:12 2014 -0700 > > Commit: Andy Lutomirski <luto@xxxxxxxxxxxxxx> > > CommitDate: Mon Jun 30 14:32:44 2014 -0700 > > Was this a merge? It's not a merge commit. > Is there an easy way to see exactly what was tested? This script may reproduce the error. Note that it's not 100% reproducible. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=yocto-minimal-x86_64.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd kvm=( qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel $kernel -initrd $initrd -m 320 -smp 1 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- > I had a buggy > commit called "x86: Split syscall_trace_enter > into two phases" that could have caused this problem. > 3f649f5658a163645e3ce15156176c325283762e was bad, but > 714cf438762d342673b3b131d5c90bc69ca921a9 (the newer version of that > commit) should be okay. Neither is an ancestor of the commit that the > bisect identified, though. Yeah that patch lies in another branch "luto/x86/seccomp-fastpath", so is not involved in this bug. Thanks, Fengguang > > x86_64,vsyscall: Make vsyscall emulation configurable > > > > This adds CONFIG_X86_VSYSCALL_EMULATION, guarded by CONFIG_EXPERT. > > Turning it off completely disables vsyscall emulation, saving ~3.5k > > for vsyscall_64.c, 4k for vsyscall_emu_64.S (the fake vsyscall > > page), some tiny amount of core mm code that supports a gate area, > > and possibly 4k for a wasted pagetable. The latter is because the > > vsyscall addresses are misaligned and fit poorly in the fixmap. > > > > Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx> > > > > =================================================== > > PARENT COMMIT NOT CLEAN. LOOK OUT FOR WRONG BISECT! > > =================================================== > > Attached dmesg for the parent commit, too, to help confirm whether it is a > > noise error. > > > > +-----------------------------------------------------------+------------+------------+------------------+ > > | | e1656ab2ad | > > 442aba0c61 | v3.16-rc4_071018 | > > +-----------------------------------------------------------+------------+------------+------------------+ > > | boot_successes | 1160 | > > 99 | 3 | > > | boot_failures | 160 | > > 231 | 8 | > > | BUG:kernel_boot_hang | 160 | > > 51 | 2 | > > | Kernel_panic-not_syncing:Attempted_to_kill_init_exitcode= | 0 | > > 180 | 6 | > > | INFO:suspicious_RCU_usage | 0 | > > 180 | 6 | > > +-----------------------------------------------------------+------------+------------+------------------+ > > > > mount: can't read '/proc/mounts': No such file or directory > > [ 33.736413] init[1]: segfault at ffffffffff600400 ip ffffffffff600400 sp > > 00007fff2894a8a8 error 15 > > [ 33.737608] init[1]: segfault at ffffffffff600400 ip ffffffffff600400 sp > > 00007fff28949eb8 error 15 > > [ 33.739046] Kernel panic - not syncing: Attempted to kill init! > > exitcode=0x0000000b > > [ 33.739046] > > [ 33.740015] CPU: 0 PID: 1 Comm: init Not tainted > > 3.16.0-rc3-00010-g442aba0 #4 > > [ 33.740015] 0000000000000000 ffff880000033cc0 ffffffff81ff485f > > ffff880000033d38 > > [ 33.740015] ffffffff81ff1342 ffff880000000010 ffff880000033d48 > > ffff880000033ce8 > > [ 33.740015] ffffffff82c440c0 000000000000000b 8c6318c6318c6320 > > 00000007db00a678 > > [ 33.740015] Call Trace: > > [ 33.740015] [<ffffffff81ff485f>] dump_stack+0x19/0x1b > > [ 33.740015] [<ffffffff81ff1342>] panic+0xcb/0x1fb > > [ 33.740015] [<ffffffff81093b2f>] do_exit+0x3dd/0x80f > > [ 33.740015] [<ffffffff810b071d>] ? local_clock+0x14/0x1d > > [ 33.740015] [<ffffffff81094002>] do_group_exit+0x75/0xb4 > > [ 33.740015] [<ffffffff8109c7e7>] get_signal_to_deliver+0x48a/0x4aa > > [ 33.740015] [<ffffffff8100231a>] do_signal+0x43/0x5ba > > [ 33.740015] [<ffffffff810b4b79>] ? lock_release_holdtime+0x6c/0x77 > > [ 33.740015] [<ffffffff810b83b5>] ? lock_release_non_nested+0xd0/0x21e > > [ 33.740015] [<ffffffff810b0646>] ? sched_clock_cpu+0x4e/0x62 > > [ 33.740015] [<ffffffff810fd465>] ? might_fault+0x4f/0x9c > > [ 33.740015] [<ffffffff810b6163>] ? trace_hardirqs_off_caller+0x36/0xa5 > > [ 33.740015] [<ffffffff82004298>] ? retint_signal+0x11/0x99 > > [ 33.740015] [<ffffffff810028b5>] do_notify_resume+0x24/0x53 > > [ 33.740015] [<ffffffff820042d4>] retint_signal+0x4d/0x99 > > [ 33.740015] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation > > range: 0xffffffff80000000-0xffffffff9fffffff) > > [ 33.740015] drm_kms_helper: panic occurred, switching back to text > > console > > [ 33.740015] > > [ 33.740015] =============================== > > [ 33.740015] [ INFO: suspicious RCU usage. ] > > [ 33.740015] 3.16.0-rc3-00010-g442aba0 #4 Not tainted > > [ 33.740015] ------------------------------- > > [ 33.740015] include/linux/rcupdate.h:539 Illegal context switch in RCU > > read-side critical section! > > [ 33.740015] > > [ 33.740015] other info that might help us debug this: > > [ 33.740015] > > [ 33.740015] > > [ 33.740015] rcu_scheduler_active = 1, debug_locks = 0 > > [ 33.740015] 3 locks held by init/1: > > [ 33.740015] #0: (panic_lock){....+.}, at: [<ffffffff81ff12ba>] > > panic+0x43/0x1fb > > [ 33.740015] #1: (rcu_read_lock){......}, at: [<ffffffff810ab879>] > > rcu_lock_acquire+0x0/0x23 > > [ 33.740015] #2: (&dev->mode_config.mutex){+.+.+.}, at: > > [<ffffffff814a74d7>] drm_fb_helper_panic+0x5d/0xab > > [ 33.740015] > > [ 33.740015] stack backtrace: > > [ 33.740015] CPU: 0 PID: 1 Comm: init Not tainted > > 3.16.0-rc3-00010-g442aba0 #4 > > [ 33.740015] 0000000000000000 ffff8800000339d0 ffffffff81ff485f > > ffff880000033a00 > > [ 33.740015] ffffffff810b8824 ffffffff82836248 000000000000024a > > 0000000000000000 > > [ 33.740015] ffff88001012e008 ffff880000033a10 ffffffff810adce3 > > ffff880000033a38 > > [ 33.740015] Call Trace: > > [ 33.740015] [<ffffffff81ff485f>] dump_stack+0x19/0x1b > > [ 33.740015] [<ffffffff810b8824>] lockdep_rcu_suspicious+0xf6/0xff > > [ 33.740015] [<ffffffff810adce3>] rcu_preempt_sleep_check+0x45/0x47 > > [ 33.740015] [<ffffffff810afedf>] __might_sleep+0x17/0x19a > > [ 33.740015] [<ffffffff8200019e>] mutex_lock_nested+0x2e/0x369 > > [ 33.740015] [<ffffffff810b8657>] ? lock_release+0x154/0x185 > > [ 33.740015] [<ffffffff810b61df>] ? trace_hardirqs_off+0xd/0xf > > [ 33.740015] [<ffffffff814b4ad3>] _object_find+0x25/0x6c > > [ 33.740015] [<ffffffff814b5283>] drm_mode_object_find+0x38/0x53 > > [ 33.740015] [<ffffffff81593f6e>] cirrus_connector_best_encoder+0x21/0x2f > > [ 33.740015] [<ffffffff814a5382>] drm_crtc_helper_set_config+0x38c/0x83c > > [ 33.740015] [<ffffffff814b6c44>] drm_mode_set_config_internal+0x53/0xca > > [ 33.740015] [<ffffffff814a731f>] restore_fbdev_mode+0x91/0xad > > [ 33.740015] [<ffffffff814a74e3>] drm_fb_helper_panic+0x69/0xab > > [ 33.740015] [<ffffffff810ab92c>] notifier_call_chain+0x61/0x8b > > [ 33.740015] [<ffffffff810aba4f>] __atomic_notifier_call_chain+0x7e/0xe6 > > [ 33.740015] [<ffffffff810abac6>] atomic_notifier_call_chain+0xf/0x11 > > [ 33.740015] [<ffffffff81ff1367>] panic+0xf0/0x1fb > > [ 33.740015] [<ffffffff81093b2f>] do_exit+0x3dd/0x80f > > [ 33.740015] [<ffffffff810b071d>] ? local_clock+0x14/0x1d > > [ 33.740015] [<ffffffff81094002>] do_group_exit+0x75/0xb4 > > [ 33.740015] [<ffffffff8109c7e7>] get_signal_to_deliver+0x48a/0x4aa > > [ 33.740015] [<ffffffff8100231a>] do_signal+0x43/0x5ba > > [ 33.740015] [<ffffffff810b4b79>] ? lock_release_holdtime+0x6c/0x77 > > [ 33.740015] [<ffffffff810b83b5>] ? lock_release_non_nested+0xd0/0x21e > > [ 33.740015] [<ffffffff810b0646>] ? sched_clock_cpu+0x4e/0x62 > > [ 33.740015] [<ffffffff810fd465>] ? might_fault+0x4f/0x9c > > [ 33.740015] [<ffffffff810b6163>] ? trace_hardirqs_off_caller+0x36/0xa5 > > [ 33.740015] [<ffffffff82004298>] ? retint_signal+0x11/0x99 > > [ 33.740015] [<ffffffff810028b5>] do_notify_resume+0x24/0x53 > > [ 33.740015] [<ffffffff820042d4>] retint_signal+0x4d/0x99 > > [ 33.740015] Rebooting in 10 seconds.. > > Elapsed time: 40 > > qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel > > /kernel/x86_64-randconfig-hsxa0-07110255/442aba0c6131f0c41dfc5edb6bfb88335556523f/vmlinuz-3.16.0-rc3-00010-g442aba0 > > -append 'hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug > > sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 > > softlockup_panic=1 nmi_watchdog=panic prompt_ramdisk=0 > > console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw > > link=/kbuild-tests/run-queue/kvm/x86_64-randconfig-hsxa0-07110255/linux-devel:devel-hourly-2014071018:442aba0c6131f0c41dfc5edb6bfb88335556523f:bisect-linux9/.vmlinuz-442aba0c6131f0c41dfc5edb6bfb88335556523f-20140711073043-10-ivb41 > > branch=linux-devel/devel-hourly-2014071018 > > BOOT_IMAGE=/kernel/x86_64-randconfig-hsxa0-07110255/442aba0c6131f0c41dfc5edb6bfb88335556523f/vmlinuz-3.16.0-rc3-00010-g442aba0 > > drbd.minor_count=8' -initrd /kernel-tests/initrd/yocto-minimal-x86_64.cgz > > -m 320 -smp 1 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc > > -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile > > /dev/shm/kboot/pid-yocto-ivb41-17 -serial > > file:/dev/shm/kboot/serial-yocto-ivb41-17 -daemonize -display none -monitor > > null > > > > git bisect start c80be3ae11770011071103d3e920864c275472a8 > > cd3de83f147601356395b57a8673e9c5ff1e59d1 -- > > git bisect bad 6e36d433610a3ebfdef000f1fb283e3f218a8a32 # 20:54 0- > > 19 Merge 'omap/omap-for-v3.16/fixes' into devel-hourly-2014071018 > > git bisect bad 14604ab36faba88a89cb2c9611509f5a1c1cac21 # 20:54 0- > > 222 Merge 'ulf.hansson-mmc/next' into devel-hourly-2014071018 > > git bisect good 9141a68d71aa193f78aac5306fc728fba8fb59f4 # 21:50 330+ > > 94 Merge 'm68k/for-linus' into devel-hourly-2014071018 > > git bisect bad 13987d1746951b727146fef187406b7be00a3fd0 # 22:12 0- > > 7 Merge 'luto/x86/vsyscall' into devel-hourly-2014071018 > > git bisect good 7104a2e08de8bddb52d4714fad63d8a7977ea7f2 # 23:19 330+ > > 22 x86_64: Move getcpu code from vsyscall_64.c to vdso/vma.c > > git bisect good e1656ab2adfd1891f62610abe3e85ad992ee0cbf # 23:26 330+ > > 113 arm64,ia64,ppc,s390,sh,tile,um,x86,mm: Remove default gate area > > git bisect bad 465c34985bb9823bb4536eb6751197f2d295ca32 # 23:29 54- > > 91 x86,vdso: Set VM_MAYREAD for the vvar vma > > git bisect bad 442aba0c6131f0c41dfc5edb6bfb88335556523f # 23:31 0- > > 37 x86_64,vsyscall: Make vsyscall emulation configurable > > # first bad commit: [442aba0c6131f0c41dfc5edb6bfb88335556523f] > > x86_64,vsyscall: Make vsyscall emulation configurable > > git bisect good e1656ab2adfd1891f62610abe3e85ad992ee0cbf # 12:09 990+ > > 160 arm64,ia64,ppc,s390,sh,tile,um,x86,mm: Remove default gate area > > git bisect bad c80be3ae11770011071103d3e920864c275472a8 # 12:10 0- > > 8 0day head guard for 'devel-hourly-2014071018' > > git bisect good 85d90faed31ec74fb28a450fbc368d982a785924 # 13:11 990+ > > 518 Merge branch 'drm-fixes' of > > git://people.freedesktop.org/~airlied/linux > > git bisect good 47cf0ce945c8310228ff2d4bd756e5313f4659c1 # 13:21 990+ > > 418 Add linux-next specific files for 20140710 > > > > > > > > Thanks, > > Fengguang > > > > _______________________________________________ > > LKP mailing list > > LKP@xxxxxxxxxxxxxxx > > > > > > -- > Andy Lutomirski > AMA Capital Management, LLC _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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