I love 0day! That is all. On Wed, Aug 27, 2014 at 10:09 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/djbw/usb.git td-fragments-v1 > > commit e65e21a542cab81d794db4e5fe919c4e1d624ea7 > Author: Dan Williams <dan.j.williams@xxxxxxxxx> > AuthorDate: Tue Jul 22 00:08:51 2014 -0700 > Commit: Dan Williams <dan.j.williams@xxxxxxxxx> > CommitDate: Fri Aug 22 10:06:50 2014 -0700 > > xhci: unit test ring enqueue/dequeue routines > > Given the complexity of satisfying xhci 1.0+ host trb boundary > constraints, provide a test case that exercises inserting mid-segment > links into a ring. > > The linker --wrap= option is used to not pollute the global identifier > space and to make it clear which standard xhci driver routines are being > mocked-up. The --wrap= option does not come into play when both > xhci-hcd and xhci-test are built-in to the kernel, so namespace > collisions are prevented by excluding xhci-test from the build when > xhci-hcd is built-in. > > It's unfortunate that this is an in-kernel test rather than userspace > and that the infrastructure is custom rather than generic. That said, > it serves its purpose of exercising the corner cases of the scatterlist > parsing implementation in xhci. > > Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> > > +------------------------------------------------------+------------+------------+ > | | fb6fa3e625 | e65e21a542 | > +------------------------------------------------------+------------+------------+ > | boot_successes | 60 | 0 | > | boot_failures | 0 | 20 | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference | 0 | 20 | > | Oops | 0 | 20 | > | RIP:setup_test_skip64 | 0 | 20 | > | Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | > | backtrace:do_test | 0 | 20 | > | backtrace:xhci_test_init | 0 | 20 | > | backtrace:kernel_init_freeable | 0 | 20 | > +------------------------------------------------------+------------+------------+ > > [ 12.405859] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver > [ 12.406471] ohci-pci: OHCI PCI platform driver > [ 12.406906] ohci-platform: OHCI generic platform driver > [ 12.407510] BUG: unable to handle kernel NULL pointer dereference at (null) > [ 12.408218] IP: [<ffffffff81968843>] setup_test_skip64+0x183/0x270 > [ 12.408781] PGD 0 > [ 12.409010] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC > [ 12.409450] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.16.0-rc5-00225-ge65e21a #6 > [ 12.410102] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 > [ 12.410599] task: ffff880012128000 ti: ffff880012130000 task.ti: ffff880012130000 > [ 12.410950] RIP: 0010:[<ffffffff81968843>] [<ffffffff81968843>] setup_test_skip64+0x183/0x270 > [ 12.410950] RSP: 0000:ffff880012133d08 EFLAGS: 00010202 > [ 12.410950] RAX: ffff880012117000 RBX: 0000000000000000 RCX: 000000078000000f > [ 12.410950] RDX: 0000000000000040 RSI: 0000000000000f01 RDI: 0000000000000000 > [ 12.410950] RBP: ffff880012133d48 R08: 0000000000000fe0 R09: 0000000000000000 > [ 12.410950] R10: 00000000000f0000 R11: 0000000000000001 R12: 0000000080000000 > [ 12.410950] R13: 0000000000000000 R14: 000000000000ffe0 R15: 000000000000ffe0 > [ 12.410950] FS: 0000000000000000(0000) GS:ffff880012400000(0000) knlGS:0000000000000000 > [ 12.410950] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 12.410950] CR2: 0000000000000000 CR3: 0000000002568000 CR4: 00000000000006b0 > [ 12.410950] Stack: > [ 12.410950] ffff880012133ddc ffff880012133de8 ffff880012133e10 0000000000000000 > [ 12.410950] 0000000000000000 ffff88000b1a2400 0000000000000000 0000000000000000 > [ 12.410950] ffff880012133e48 ffffffff81d71168 0000000000000000 0000303a35343200 > [ 12.410950] Call Trace: > [ 12.410950] [<ffffffff81d71168>] do_test.constprop.70+0x47/0x894 > [ 12.410950] [<ffffffff819686c0>] ? setup_test_32_248_8+0x340/0x340 > [ 12.410950] [<ffffffff81826630>] ? device_create_groups_vargs+0xe0/0x1a0 > [ 12.410950] [<ffffffff82d3a394>] ? ohci_platform_init+0x60/0x60 > [ 12.410950] [<ffffffff82d3a585>] xhci_test_init+0x1f1/0x2a5 > [ 12.410950] [<ffffffff819686c0>] ? setup_test_32_248_8+0x340/0x340 > [ 12.410950] [<ffffffff81968380>] ? setup_test_wrap64+0x320/0x320 > [ 12.410950] [<ffffffff81968060>] ? setup_test_dont_trim+0x2f0/0x2f0 > [ 12.410950] [<ffffffff81967d70>] ? xhci_ring_free+0x1d0/0x1d0 > [ 12.410950] [<ffffffff82d3a394>] ? ohci_platform_init+0x60/0x60 > [ 12.410950] [<ffffffff82ce2695>] do_one_initcall+0x143/0x24d > [ 12.410950] [<ffffffff810dab7b>] ? parse_args+0x2fb/0x530 > [ 12.410950] [<ffffffff82ce297b>] kernel_init_freeable+0x1dc/0x2aa > [ 12.410950] [<ffffffff82ce19d5>] ? do_early_param+0xc3/0xc3 > [ 12.410950] [<ffffffff81d4b250>] ? rest_init+0xd0/0xd0 > [ 12.410950] [<ffffffff81d4b25e>] kernel_init+0xe/0x160 > [ 12.410950] [<ffffffff81d88d3c>] ret_from_fork+0x7c/0xb0 > [ 12.410950] [<ffffffff81d4b250>] ? rest_init+0xd0/0xd0 > [ 12.410950] Code: 48 85 ff 40 0f 94 c6 44 0f b6 ce 49 83 c1 02 4a 83 04 cd a0 e9 b3 82 01 45 31 c9 40 84 f6 75 0b 45 0f b6 ca 49 c1 e1 04 49 01 f9 <49> 8b 39 48 8b 30 48 c1 e1 06 4c 89 78 10 44 89 40 08 01 d3 89 > [ 12.410950] RIP [<ffffffff81968843>] setup_test_skip64+0x183/0x270 > [ 12.410950] RSP <ffff880012133d08> > [ 12.410950] CR2: 0000000000000000 > [ 12.410950] ---[ end trace 3157077290b0c2c1 ]--- > [ 12.410950] Kernel panic - not syncing: Fatal exception > > git bisect start 66e8dfa4e0d9600dedc08adcaac83c378b65351b 52addcf9d6669fa439387610bc65c92fa0980cef -- > git bisect good 511b6daa3a596ab5c54bee5dab56ed4f77337a40 # 22:39 20+ 0 Merge 'ipvs-next/master' into devel-hourly-2014082722 > git bisect bad 73e9ac542728ea03b8796cf9818950dc9e05d534 # 22:49 0- 20 Merge 'hid/for-3.18/upstream' into devel-hourly-2014082722 > git bisect good 513dd18bd1b397935660c01daa14e53e819b9270 # 23:00 20+ 0 Merge 'netdev-next/master' into devel-hourly-2014082722 > git bisect good a617416625136eec767df79308544cbb46fe0311 # 23:03 20+ 0 Merge 'kvm-ppc/kvm-ppc-queue' into devel-hourly-2014082722 > git bisect good 858bf88bf6175c80920daa8c9210b0209443b7e1 # 23:06 20+ 0 Merge 'spi/for-next' into devel-hourly-2014082722 > git bisect good cdb03bc488490bb364fa29ec292ecd3291ca5770 # 23:10 20+ 0 Merge 'regulator/for-next' into devel-hourly-2014082722 > git bisect bad 8f5a71eb299401d62562e7ab634665ff98850e8f # 23:13 0- 20 Merge 'djbw-usb/td-fragments-v1' into devel-hourly-2014082722 > git bisect good a75ef911cf100b8cf7d25baf6dac8052328a96e7 # 23:22 20+ 0 xhci: clarify "ring valid" checks > git bisect good 652b7ee36207f186f3d701675483df43b4845c5c # 23:26 20+ 0 xhci: kill ->num_trbs_free_temp in struct xhci_ring > git bisect good 1c11eb8545a3321e7ca27fc7ba8c56b6e6df2b57 # 23:31 20+ 0 xhci: add xhci_ring_reap_td() helper > git bisect bad e65e21a542cab81d794db4e5fe919c4e1d624ea7 # 23:54 0- 20 xhci: unit test ring enqueue/dequeue routines > git bisect good fb6fa3e625e1e453aea9eeb97d58bee30e1c0781 # 23:58 20+ 0 xhci: v1.0 scatterlist enqueue support (td-fragment rework) > # first bad commit: [e65e21a542cab81d794db4e5fe919c4e1d624ea7] xhci: unit test ring enqueue/dequeue routines > git bisect good fb6fa3e625e1e453aea9eeb97d58bee30e1c0781 # 00:00 60+ 0 xhci: v1.0 scatterlist enqueue support (td-fragment rework) > git bisect bad 66e8dfa4e0d9600dedc08adcaac83c378b65351b # 00:00 0- 11 0day head guard for 'devel-hourly-2014082722' > git bisect good 68e370289c29e3beac99d59c6d840d470af9dfcf # 00:19 60+ 2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux > git bisect good d05446ae2128064a4bb8f74c84f6901ffb5c94bc # 00:33 60+ 1 Add linux-next specific files for 20140827 > > > This script may reproduce the error. > > ---------------------------------------------------------------------------- > #!/bin/bash > > kernel=$1 > initrd=quantal-core-x86_64.cgz > > wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd > > kvm=( > qemu-system-x86_64 > -cpu kvm64 > -enable-kvm > -kernel $kernel > -initrd $initrd > -m 320 > -smp 2 > -net nic,vlan=1,model=e1000 > -net user,vlan=1 > -boot order=nc > -no-reboot > -watchdog i6300esb > -rtc base=localtime > -serial stdio > -display none > -monitor null > ) > > append=( > hung_task_panic=1 > earlyprintk=ttyS0,115200 > debug > apic=debug > sysrq_always_enabled > rcupdate.rcu_cpu_stall_timeout=100 > panic=-1 > softlockup_panic=1 > nmi_watchdog=panic > oops=panic > load_ramdisk=2 > prompt_ramdisk=0 > console=ttyS0,115200 > console=tty0 > vga=normal > root=/dev/ram0 > rw > drbd.minor_count=8 > ) > > "${kvm[@]}" --append "${append[*]}" > ---------------------------------------------------------------------------- > > Thanks, > Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
