> On 01 August 2014 at 03:25 Fengguang Wu <fengguang...@intel.com> 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/torvalds/linux.git master > commit dac52fc1826a788d2591a4f77e3c482b30f577e2 > Author: Fabian Frederick <f...@skynet.be> > AuthorDate: Thu Apr 3 14:50:23 2014 -0700 > Commit: Linus Torvalds <torva...@linux-foundation.org> > CommitDate: Thu Apr 3 16:21:25 2014 -0700 > > BEFS: logging cleanup > > Summary: > - all printk(KERN_foo converted to pr_foo() > - add pr_fmt and remove redundant prefixes > - convert befs_() to va_format (based on patch by Joe Perches) > - remove non standard %Lu > - use __func__ for all debugging > > [a...@linux-foundation.org: fix printk warnings, reported by Fengguang] > Signed-off-by: Fabian Frederick <f...@skynet.be> > Cc: Joe Perches <j...@perches.com> > Cc: Fengguang Wu <fengguang...@gmail.com> > Signed-off-by: Andrew Morton <a...@linux-foundation.org> > Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> > > +--------------------------------------------+------------+------------+---------------+ > | | 91a52ab7d6 | dac52fc182 | > next-20140730 | > +--------------------------------------------+------------+------------+---------------+ > | boot_successes | 1000 | 895 | 159 > | > | boot_failures | 0 | 5 | 2 > | > | BUG:unable_to_handle_kernel_paging_request | 0 | 5 | 2 > | > | Oops | 0 | 5 | 2 > | > | EIP_is_at_strnlen | 0 | 5 | 2 > | > | Kernel_panic-not_syncing:Fatal_exception | 0 | 5 | 2 > | > | backtrace:do_mount | 0 | 5 | 2 > | > | backtrace:SyS_mount | 0 | 5 | 2 > | > +--------------------------------------------+------------+------------+---------------+ > > [ 6.576645] power_supply test_battery: prop PRESENT=1 > [ 6.578273] power_supply test_usb: uevent > [ 6.579644] power_supply test_usb: POWER_SUPPLY_NAME=test_usb > [ 6.581395] BUG: unable to handle kernel paging request at cfc07000 > [ 6.583373] IP: [] strnlen+0x9/0x19 > [ 6.584678] *pde = 13bc1067 *pte = 0fc07060 > [ 6.584678] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > [ 6.584678] CPU: 0 PID: 483 Comm: mount Not tainted 3.14.0-07551-gdac52fc > #1 > [ 6.584678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > Bochs 01/01/2011 > [ 6.584678] task: d0d29500 ti: d006e000 task.ti: d006e000 > [ 6.584678] EIP: 0060:[] EFLAGS: 00010097 CPU: 0 > [ 6.584678] EIP is at strnlen+0x9/0x19 > [ 6.584678] EAX: cfc07000 EBX: d006fe40 ECX: cfc06200 EDX: fffff1fe > [ 6.584678] ESI: d006fe44 EDI: c2247728 EBP: d006fcb8 ESP: d006fcb8 > [ 6.584678] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 6.584678] CR0: 8005003b CR2: cfc07000 CR3: 10f33000 CR4: 000006d0 > [ 6.584678] Stack: > [ 6.584678] d006fcd4 c138e850 cfc06200 c2247361 d006fe40 d006fe44 c1acbda3 > d006fd1c > [ 6.584678] c138fa8f c1e13600 d006ffff c183ffff 879a3bef d006fcfc c10824cf > 000003ce > [ 6.584678] c224735a c1acbda3 c2247728 c2247361 ff0a0004 ffffffff c105ffff > c224735a > [ 6.584678] Call Trace: > [ 6.584678] [] string.isra.5+0x29/0x93 > [ 6.584678] [] vsnprintf+0x159/0x281 > [ 6.584678] [] ? _raw_spin_unlock_irq+0x5/0x3e > [ 6.584678] [] ? tick_program_event+0x22/0x26 > [ 6.584678] [] ? load_balance+0x3fc/0x681 > [ 6.584678] [] pointer.isra.16+0x220/0x37e > [ 6.584678] [] ? string.isra.5+0x29/0x93 > [ 6.584678] [] vsnprintf+0x194/0x281 > [ 6.584678] [] ? _raw_spin_lock_irq+0x62/0x72 > [ 6.584678] [] ? load_balance+0x3fc/0x681 > [ 6.584678] [] ? pc_clock_adjtime+0x33/0x4b > [ 6.584678] [] vscnprintf+0x14/0x25 > [ 6.584678] [] vprintk_emit+0x249/0x451 > [ 6.584678] [] printk+0x38/0x3a > [ 6.584678] [] befs_debug+0x37/0x39 > [ 6.584678] [] befs_dump_super_block+0x30/0x28d > [ 6.584678] [] ? befs_load_sb+0x127/0x13b > [ 6.584678] [] befs_fill_super+0x22d/0x384 > [ 6.584678] [] ? disk_name+0x30/0x81 > [ 6.584678] [] ? ns_test_super+0x11/0x11 > [ 6.584678] [] mount_bdev+0x113/0x15b > [ 6.584678] [] ? arch_local_irq_save+0x12/0x17 > [ 6.584678] [] ? __kmalloc_track_caller+0x103/0x127 > [ 6.584678] [] befs_mount+0x1a/0x1f > [ 6.584678] [] ? __ilog2_u32+0xf/0xf > [ 6.584678] [] mount_fs+0x16/0xaf > [ 6.584678] [] ? __alloc_percpu+0xa/0xc > [ 6.584678] [] ? alloc_vfsmnt+0x93/0x134 > [ 6.584678] [] vfs_kern_mount+0x43/0x9f > [ 6.584678] [] do_mount+0x5b7/0x6c4 > [ 6.584678] [] ? strndup_user+0x2c/0x3d > [ 6.584678] [] SyS_mount+0x77/0xa4 > [ 6.584678] [] syscall_call+0x7/0xb > [ 6.584678] Code: 00 00 4f eb 02 31 ff 89 f8 5f 5d c3 55 85 c9 89 e5 57 89 > c7 74 07 89 d0 f2 ae 75 01 4f 89 f8 5f 5d c3 55 89 c1 89 e5 89 c8 eb 06 <80> > 38 00 74 07 40 4a 83 fa ff 75 f4 29 c8 5d c3 55 83 c9 ff 89 > [ 6.584678] EIP: [] strnlen+0x9/0x19 SS:ESP 0068:d006fcb8 > [ 6.584678] CR2: 00000000cfc07000 > [ 6.584678] ---[ end trace d80bc704897c976c ]--- > [ 6.584678] Kernel panic - not syncing: Fatal exception > > git bisect start v3.15 v3.14 -- > git bisect bad 674366e90e5a2430e3ddef40ce51512d681944e4 # 22:06 0- > 2 Merge tag 'pci-v3.15-fixes-1' of > git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci > git bisect bad 9f800363bb0ea459e15bef0928a72c88d374e489 # 22:06 0- > 1 Merge tag 'fixes-non-critical-3.15' of > git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc > git bisect good 1aabc5990d205cdb0789a1c26143c53601e9bb07 # 22:46 900+ > 0 x86: Fix dumpstack_64 to keep state of "used" variable in loop > git bisect good d0cb5f71c5cde8e1ef6d03983641366800ceabdb # 23:44 900+ > 0 Merge tag 'vfio-v3.15-rc1' of git://github.com/awilliam/linux-vfio > git bisect bad d15fee814d8d30bbb4859ef8fef7a1f96327635b # 23:44 0- > 2 Merge branch 'for-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse > git bisect bad 4a4389abdd9822fdf3cc2ac6ed87eb811fd43acc # 23:44 0- > 4 Merge branch 'linux_next' of > git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac > git bisect bad 3cf59142bcd391680beb6932838fe09a73947705 # 23:44 0- > 1 Merge tag 'hwmon-for-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging > git bisect bad 76ca7d1cca761bb9712dfcad9a27d70b520874ae # 23:44 0- > 2 Merge branch 'akpm' (incoming from Andrew) > git bisect good 70d14fcf365c1b20d380d542ec53906f2b5e2435 # 00:29 900+ > 0 MAINTAINERS: add backlight co-maintainers > git bisect good 98e2d21faaf96d879e2746cedd96f5c38c04f9b3 # 02:11 900+ > 1 rtc: rtc-sirfsoc: remove unnecessary OOM messages > git bisect good fda9909ddaab13fb7b35b94f204623c1f9571fc7 # 02:47 900+ > 0 rtc: pm8xxx: move device_init_wakeup() before rtc_register > git bisect bad 2cc88f3a5f16ae9a3c8f54de1b2fd4a397b36075 # 02:53 0- > 1 nilfs2: implementation of NILFS_IOCTL_SET_SUINFO ioctl > git bisect good 84ee353df07e9beec200da44ac70f583449fffb1 # 05:13 900+ > 0 fs/minix/inode.c: add __init to init_inodecache() > git bisect bad 5f356fd4d75fd66e62c803fc7a684863c4b38e59 # 05:33 104- > 1 fs/coda/inode.c: add __init to init_inodecache() > git bisect good 91a52ab7d664a1c8972a0ecb30955d34aea54d7f # 07:03 900+ > 0 fs/befs/linuxvfs.c: add __init to befs_init_inodecache() > git bisect bad dac52fc1826a788d2591a4f77e3c482b30f577e2 # 07:09 0- > 1 BEFS: logging cleanup > # first bad commit: [dac52fc1826a788d2591a4f77e3c482b30f577e2] BEFS: logging > cleanup > git bisect good 91a52ab7d664a1c8972a0ecb30955d34aea54d7f # 07:15 1000+ > 0 fs/befs/linuxvfs.c: add __init to befs_init_inodecache() > git bisect bad fcf6395d41087217d4b88d5b2ad7a1ce66ca6ced # 07:15 0- > 2 Add linux-next specific files for 20140730 > git bisect bad 7c909b09372d5b064651202bf236b63caddd1777 # 07:39 219- > 1 Merge tag 'clk-fixes-for-linus' of > git://git.linaro.org/people/mike.turquette/linux > git bisect bad 5c159783e8086645dd7aa42e35c531ad0e8dd16d # 07:51 9- > 1 Add linux-next specific files for 20140731 > > > This script may reproduce the error. > > ---------------------------------------------------------------------------- > #!/bin/bash > > kernel=$1 > initrd=yocto-minimal-i386.cgz > > wget --no-clobber > https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd > > kvm=( > qemu-system-x86_64 > -cpu kvm64 > -enable-kvm > -kernel $kernel > -initrd $initrd > -m 320 > -smp 1 > -net nic,vlan=1,model=e1000 > -net user,vlan=1 > -boot order=nc > -no-reboot > -watchdog i6300esb > -rtc base=localtime > -serial stdio > -display none > -monitor null > ) > > append=( > hung_task_panic=1 > earlyprintk=ttyS0,115200 > debug > apic=debug > sysrq_always_enabled > rcupdate.rcu_cpu_stall_timeout=100 > panic=10 > softlockup_panic=1 > nmi_watchdog=panic > load_ramdisk=2 > prompt_ramdisk=0 > console=ttyS0,115200 > console=tty0 > vga=normal > root=/dev/ram0 > rw > drbd.minor_count=8 > ) > > "${kvm[@]}" --append "${append[*]}" > ---------------------------------------------------------------------------- > > Thanks, > Fengguang
Hello Fengguang, I've tried the script above with attached config file on both linux/linux-next but I was unable to reproduce the problem. The difference I see is on the id. I have ram0 (see below) where you have nullb0 / nullb1. Did I miss a script to run the same configuration ? befs: (ram0): ---> befs_fill_super [ 7.545246] befs: (ram0): Using x86 superblock location [ 7.548084] befs: (ram0): befs_super_block information [ 7.550871] befs: (ram0): name ... Problem could come from the double mount operation or a bad name pointer bugging %pV in befs_debug. Regards, Fabian > _______________________________________________ > LKP mailing list > l...@linux.intel.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
