SLAB + UML : WARNING: at mm/page_alloc.c:2386

DISCUSSION Toralf Förster 3 participants 8 messages Mar 14, 2013 – Mar 15, 2013

Subsystems (2)

Memory management MM core

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Toralf Förster

author

2013-03-14 19:07 UTC #0 lore raw

The following WARNING: can be triggered sometimes with trinity [1] under a user mode linux image using the SLUB allocator (and not with SLAB)

2013-03-14T19:09:51.071+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T19:09:51.071+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe30:  [<080dec76>] memdup_user+0x26/0x70
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe4c:  [<080dee7e>] strndup_user+0x3e/0x60
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe68:  [<0811b440>] copy_mount_string+0x30/0x50
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899feac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899ffec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T19:09:51.076+01:00 trinity kernel: 
2013-03-14T19:09:51.076+01:00 trinity kernel: ---[ end trace fd6f346f805efdbe ]---

for an UML guest (stable Gentoo x86) with kernel version 3.9-rc2-.... running at a host which is a stable x86 Gentoo with kernel 3.7.10

The kernel config of the UML guest is attached.

[1] http://codemonkey.org.uk/

Signature · 3 lines

MfG/Sincerely
Toralf FA?rster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

#
# Automatically generated file; DO NOT EDIT. # User Mode Linux/x86 3.9.0-rc2 Kernel Configuration # CONFIG_DEFCONFIG_LIST="arch/$ARCH/defconfig" CONFIG_UML=y
CONFIG_MMU=y
CONFIG_NO_IOMEM=y
# CONFIG_TRACE_IRQFLAGS_SUPPORT is not set CONFIG_LOCKDEP_SUPPORT=y
# CONFIG_STACKTRACE_SUPPORT is not set CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_GENERIC_BUG=y
CONFIG_HZ=100

#
# UML-specific options
#

#
# Host processor type and features
#
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MELAN is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
CONFIG_MCORE2=y
# CONFIG_MATOM is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=5
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_TRANSMETA_32=y
CONFIG_UML_X86=y
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_3_LEVEL_PGTABLES is not set
CONFIG_ARCH_HAS_SC_SIGNALS=y
CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_STATIC_LINK is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=0
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_CROSS_MEMORY_ATTACH=y
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CLEANCACHE is not set
# CONFIG_FRONTSWAP is not set
CONFIG_LD_SCRIPT_DYN=y
CONFIG_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
CONFIG_BINFMT_MISC=y
CONFIG_COREDUMP=y
CONFIG_HOSTFS=y
# CONFIG_HPPFS is not set
CONFIG_MCONSOLE=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_KERNEL_STACK_ORDER=2
# CONFIG_MMAPPER is not set
CONFIG_NO_DMA=y
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=128
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_FHANDLE is not set
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_WATCH=y
CONFIG_AUDIT_TREE=y
# CONFIG_AUDIT_LOGINUID_IMMUTABLE is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_SHOW=y
# CONFIG_ALWAYS_USE_PERSISTENT_CLOCK is not set
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set

#
# RCU Subsystem
#
CONFIG_TINY_RCU=y
# CONFIG_PREEMPT_RCU is not set
# CONFIG_RCU_STALL_COMMON is not set
# CONFIG_TREE_RCU_TRACE is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
# CONFIG_CGROUP_FREEZER is not set
# CONFIG_CGROUP_DEVICE is not set
# CONFIG_CPUSETS is not set
# CONFIG_CGROUP_CPUACCT is not set
# CONFIG_RESOURCE_COUNTERS is not set
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
# CONFIG_CFS_BANDWIDTH is not set
# CONFIG_RT_GROUP_SCHED is not set
# CONFIG_BLK_CGROUP is not set
# CONFIG_CHECKPOINT_RESTORE is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_IPC_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_NET_NS is not set
CONFIG_UIDGID_CONVERTED=y
# CONFIG_UIDGID_STRICT_TYPE_CHECKS is not set
CONFIG_SCHED_AUTOGROUP=y
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_HAVE_UID16=y
CONFIG_UID16=y
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set

#
# Kernel Performance Events And Counters
#
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_PROFILING is not set
# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_MODULES_USE_ELF_REL=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_OLD_SIGACTION=y

#
# GCOV-based kernel profiling
#
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
# CONFIG_MODULES is not set
CONFIG_BLOCK=y
CONFIG_LBDAF=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_EFI_PARTITION=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
# CONFIG_FREEZER is not set

#
# UML Character Devices
#
CONFIG_STDERR_CONSOLE=y
CONFIG_STDIO_CONSOLE=y
CONFIG_SSL=y
CONFIG_NULL_CHAN=y
CONFIG_PORT_CHAN=y
CONFIG_PTY_CHAN=y
CONFIG_TTY_CHAN=y
CONFIG_XTERM_CHAN=y
# CONFIG_NOCONFIG_CHAN is not set
CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
CONFIG_CON_CHAN="xterm"
CONFIG_SSL_CHAN="pts"
CONFIG_UML_SOUND=y
CONFIG_SOUND=y
CONFIG_SOUND_OSS_CORE=y
CONFIG_HOSTAUDIO=y

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_FW_LOADER_USER_HELPER=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_GENERIC_CPU_DEVICES=y
# CONFIG_DMA_SHARED_BUFFER is not set

#
# Bus devices
#
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_UBD=y
# CONFIG_BLK_DEV_UBD_SYNC is not set
CONFIG_BLK_DEV_COW_COMMON=y
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_RBD is not set

#
# Misc devices
#
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set

#
# Texas Instruments shared transport line discipline #

#
# Altera FPGA firmware download module
#

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# CONFIG_SCSI_DMA is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_MD=y
# CONFIG_BLK_DEV_MD is not set
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=y
# CONFIG_DM_SNAPSHOT is not set
# CONFIG_DM_THIN_PROVISIONING is not set
# CONFIG_DM_CACHE is not set
# CONFIG_DM_MIRROR is not set
# CONFIG_DM_RAID is not set
# CONFIG_DM_ZERO is not set
# CONFIG_DM_MULTIPATH is not set
# CONFIG_DM_DELAY is not set
CONFIG_DM_UEVENT=y
# CONFIG_DM_FLAKEY is not set
# CONFIG_DM_VERITY is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_EQUALIZER is not set
# CONFIG_MII is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
CONFIG_TUN=y
# CONFIG_VETH is not set

#
# CAIF transport drivers
#

#
# Distributed Switch Architecture drivers
#
# CONFIG_NET_DSA_MV88E6XXX is not set
# CONFIG_NET_DSA_MV88E6060 is not set
# CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set
# CONFIG_NET_DSA_MV88E6131 is not set
# CONFIG_NET_DSA_MV88E6123_61_65 is not set
# CONFIG_ETHERNET is not set
# CONFIG_PHYLIB is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers #
# CONFIG_WAN is not set

#
# Character devices
#
CONFIG_TTY=y
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y
CONFIG_HW_RANDOM=y
CONFIG_UML_RANDOM=y
# CONFIG_R3964 is not set
# CONFIG_NSC_GPIO is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_I2C is not set
# CONFIG_HSI is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#
# CONFIG_PTP_1588_CLOCK is not set

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks. #
# CONFIG_PTP_1588_CLOCK_PCH is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_POWER_AVS is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
# CONFIG_REGULATOR is not set
# CONFIG_SOUND_OSS_CORE_PRECLAIM is not set
# CONFIG_USB_ARCH_HAS_OHCI is not set
# CONFIG_USB_ARCH_HAS_EHCI is not set
# CONFIG_USB_ARCH_HAS_XHCI is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set

#
# Virtio drivers
#

#
# Microsoft Hyper-V guest support
#
# CONFIG_STAGING is not set

#
# Hardware Spinlock drivers
#
# CONFIG_MAILBOX is not set
CONFIG_IOMMU_SUPPORT=y

#
# Remoteproc drivers
#

#
# Rpmsg drivers
#
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_PWM is not set
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_DIAG is not set
CONFIG_UNIX=y
# CONFIG_UNIX_DIAG is not set
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_NET_IPVTI is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
CONFIG_INET_UDP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
CONFIG_HAVE_NET_DSA=y
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETPRIO_CGROUP is not set
CONFIG_BQL=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set

#
# UML Network Devices
#
CONFIG_UML_NET=y
CONFIG_UML_NET_ETHERTAP=y
CONFIG_UML_NET_TUNTAP=y
# CONFIG_UML_NET_SLIP is not set
# CONFIG_UML_NET_DAEMON is not set
# CONFIG_UML_NET_VDE is not set
CONFIG_UML_NET_MCAST=y
# CONFIG_UML_NET_PCAP is not set
# CONFIG_UML_NET_SLIRP is not set

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
# CONFIG_EXT2_FS_POSIX_ACL is not set
# CONFIG_EXT2_FS_SECURITY is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_EXT3_FS_XATTR=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
CONFIG_EXT4_FS=y
# CONFIG_EXT4_FS_POSIX_ACL is not set
# CONFIG_EXT4_FS_SECURITY is not set
CONFIG_EXT4_DEBUG=y
CONFIG_JBD=y
CONFIG_JBD2=y
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set
CONFIG_GENERIC_ACL=y

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set
# CONFIG_MISC_FILESYSTEMS is not set CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V2=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set CONFIG_NFS_V4=y
# CONFIG_NFS_SWAP is not set CONFIG_NFS_V4_1=y
CONFIG_PNFS_FILE_LAYOUT=y
CONFIG_PNFS_BLOCK=y CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org" # CONFIG_NFS_USE_LEGACY_DNS is not set CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
# CONFIG_NFSD_V3_ACL is not set CONFIG_NFSD_V4=y
# CONFIG_NFSD_FAULT_INJECTION is not set CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y CONFIG_SUNRPC_BACKCHANNEL=y
# CONFIG_SUNRPC_DEBUG is not set
# CONFIG_CEPH_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1" CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set CONFIG_NLS_CODEPAGE_850=y
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set CONFIG_NLS_ISO8859_15=y
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_MAC_ROMAN is not set
# CONFIG_NLS_MAC_CELTIC is not set
# CONFIG_NLS_MAC_CENTEURO is not set
# CONFIG_NLS_MAC_CROATIAN is not set
# CONFIG_NLS_MAC_CYRILLIC is not set
# CONFIG_NLS_MAC_GAELIC is not set
# CONFIG_NLS_MAC_GREEK is not set
# CONFIG_NLS_MAC_ICELAND is not set
# CONFIG_NLS_MAC_INUIT is not set
# CONFIG_NLS_MAC_ROMANIAN is not set
# CONFIG_NLS_MAC_TURKISH is not set CONFIG_NLS_UTF8=y

#
# Security options
#
CONFIG_KEYS=y
# CONFIG_ENCRYPTED_KEYS is not set
# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
CONFIG_SECURITY_DMESG_RESTRICT=y
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
# CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_AUTHENC is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
# CONFIG_CRYPTO_CRC32 is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_MD4 is not set
# CONFIG_CRYPTO_MD5 is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
CONFIG_CRYPTO_SHA256=y
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_586=y
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_586 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_586 is not set

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_HW is not set
# CONFIG_ASYMMETRIC_KEY_TYPE is not set
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_IO=y
# CONFIG_CRC_CCITT is not set
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
CONFIG_AUDIT_GENERIC=y
# CONFIG_XZ_DEC is not set
# CONFIG_XZ_DEC_BCJ is not set
CONFIG_DQL=y
CONFIG_NLATTR=y
# CONFIG_AVERAGE is not set
# CONFIG_CORDIC is not set
# CONFIG_DDR is not set

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
CONFIG_READABLE_ASM=y
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_LOCKUP_DETECTOR=y
# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
CONFIG_TIMER_STATS=y
# CONFIG_DEBUG_OBJECTS is not set
CONFIG_SLUB_DEBUG_ON=y
# CONFIG_SLUB_STATS is not set
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_PI_LIST=y
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
CONFIG_DEBUG_MUTEXES=y
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=y
# CONFIG_DEBUG_VM is not set
CONFIG_DEBUG_WRITECOUNT=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_DEBUG_LIST=y
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set

#
# RCU Debugging
#
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_GPROF is not set
# CONFIG_GCOV is not set
CONFIG_EARLY_PRINTK=y

richard -rw- weinberger

2013-03-14 19:53 UTC #1 lore raw

Quoted 14 lines · Toralf Förster

The following WARNING: can be triggered sometimes with trinity [1] under a user mode linux image using the SLUB allocator (and not with SLAB)

2013-03-14T19:09:51.071+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T19:09:51.071+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe30:  [<080dec76>] memdup_user+0x26/0x70
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe4c:  [<080dee7e>] strndup_user+0x3e/0x60

Quoted 8 lines

2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe68:  [<0811b440>] copy_mount_string+0x30/0x50
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899feac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899ffec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T19:09:51.076+01:00 trinity kernel:
2013-03-14T19:09:51.076+01:00 trinity kernel: ---[ end trace fd6f346f805efdbe ]---

Looks like strndup_user() triggers the issue.
In another trace also strndup_user() appeared.

Signature · 8 lines

Thanks,
//richard

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richard -rw- weinberger

2013-03-14 20:51 UTC #2 lore raw

In reply to Toralf Förster

Quoted 24 lines · Toralf Förster

The following WARNING: can be triggered sometimes with trinity [1] under a user mode linux image using the SLUB allocator (and not with SLAB)

2013-03-14T19:09:51.071+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T19:09:51.071+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe30:  [<080dec76>] memdup_user+0x26/0x70
2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe4c:  [<080dee7e>] strndup_user+0x3e/0x60
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe68:  [<0811b440>] copy_mount_string+0x30/0x50
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899feac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899ffec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T19:09:51.076+01:00 trinity kernel:
2013-03-14T19:09:51.076+01:00 trinity kernel: ---[ end trace fd6f346f805efdbe ]---

Quoted 4 lines

for an UML guest (stable Gentoo x86) with kernel version 3.9-rc2-.... running at a host which is a stable x86 Gentoo with kernel 3.7.10
The kernel config of the UML guest is attached.

Can you please re-run with the attached patch.
I'm wondering how much memory is requested.

Quoted 1 line

From reading the source I'd say it must be less than PAGE_SIZE.

But such a small allocation would not trigger the WARN_ON()...

Signature · 2 lines

Thanks,
//richard

mm/util.c +2 -0

index ab1424d..86e8e92 100644
@@ -89,6 +89,8 @@ void *memdup_user(const void __user *src, size_t len)
 {
 	void *p;
 
+	printk(KERN_ERR "memdup_user: %i\n", len);
+
 	/*
 	 * Always use GFP_KERNEL, since copy_from_user() can sleep and
 	 * cause pagefault, which makes it pointless to use GFP_NOFS

Toralf Förster

author

2013-03-14 20:58 UTC #3 lore raw

Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

Quoted 4 lines · richard -rw- weinberger

Can you please re-run with the attached patch.
I'm wondering how much memory is requested.
Quoted 1 line
From reading the source I'd say it must be less than PAGE_SIZE.
But such a small allocation would not trigger the WARN_ON()...

2013-03-14T21:56:58.000+01:00 trinity sshd[1158]: pam_unix(sshd:session): session opened for user tfoerste by (uid=0)
2013-03-14T21:56:59.852+01:00 trinity kernel: memdup_user: -14
2013-03-14T21:56:59.852+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T21:56:59.852+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbe30:  [<080dec82>] memdup_user+0x32/0x70
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe4c:  [<080dee7e>] strndup_user+0x3e/0x60
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe68:  [<0811b440>] copy_mount_string+0x30/0x50
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbeac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbfec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T21:56:59.853+01:00 trinity kernel:
2013-03-14T21:56:59.853+01:00 trinity kernel: ---[ end trace 5bf182a223bd623c ]---
2013-03-14T21:56:59.853+01:00 trinity kernel: memdup_user: -14
2013-03-14T21:56:59.942+01:00 trinity kernel: VFS: Warning: trinity-child0 using old stat() call. Recompile your binary.
2013-03-14T21:56:59.942+01:00 trinity kernel: VFS: Warning: trinity-child0 using old stat() call. Recompile your binary.
2013-03-14T21:56:59.942+01:00 trinity kernel: VFS: Warning: trinity-child0 using old stat() call. Recompile your binary.
2013-03-14T21:57:01.000+01:00 trinity sshd[1160]: Received disconnect from 192.168.0.254: 11: disconnected by user
2013-03-14T21:57:01.000+01:00 trinity sshd[1158]: pam_unix(sshd:session): session closed for user tfoerste
2013-03-14T21:57:09.087+01:00 trinity kernel: memdup_user: -14
2013-03-14T21:57:18.191+01:00 trinity kernel: memdup_user: 4089
2013-03-14T21:57:26.236+01:00 trinity kernel: memdup_user: 28

Signature · 9 lines

MfG/Sincerely
Toralf FA?rster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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Dave Jones

2013-03-14 21:21 UTC #4 lore raw

Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

Quoted 20 lines · Toralf Forster

Quoted 4 lines · richard -rw- weinberger

Can you please re-run with the attached patch.
I'm wondering how much memory is requested.
Quoted 1 line
From reading the source I'd say it must be less than PAGE_SIZE.
But such a small allocation would not trigger the WARN_ON()...

2013-03-14T21:56:58.000+01:00 trinity sshd[1158]: pam_unix(sshd:session): session opened for user tfoerste by (uid=0)
2013-03-14T21:56:59.852+01:00 trinity kernel: memdup_user: -14
2013-03-14T21:56:59.852+01:00 trinity kernel: ------------[ cut here ]------------
2013-03-14T21:56:59.852+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd14:  [<08342dd8>] dump_stack+0x22/0x24
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd2c:  [<0807d0da>] warn_slowpath_common+0x5a/0x80
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd54:  [<0807d1a3>] warn_slowpath_null+0x23/0x30
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbd64:  [<080d3213>] __alloc_pages_nodemask+0x153/0x750
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbdf0:  [<080d3838>] __get_free_pages+0x28/0x50
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbe08:  [<080fc48f>] __kmalloc_track_caller+0x3f/0x180
2013-03-14T21:56:59.852+01:00 trinity kernel: 38bfbe30:  [<080dec82>] memdup_user+0x32/0x70
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe4c:  [<080dee7e>] strndup_user+0x3e/0x60
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe68:  [<0811b440>] copy_mount_string+0x30/0x50

Quoted 8 lines

2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbe7c:  [<0811be0a>] sys_mount+0x1a/0xe0
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbeac:  [<08062a92>] handle_syscall+0x82/0xb0
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbef4:  [<08074e7d>] userspace+0x46d/0x590
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbfec:  [<0805f7cc>] fork_handler+0x6c/0x70
2013-03-14T21:56:59.853+01:00 trinity kernel: 38bfbffc:  [<5a5a5a5a>] 0x5a5a5a5a
2013-03-14T21:56:59.853+01:00 trinity kernel:
2013-03-14T21:56:59.853+01:00 trinity kernel: ---[ end trace 5bf182a223bd623c ]---
2013-03-14T21:56:59.853+01:00 trinity kernel: memdup_user: -14

hah, strndup_user taking a signed long instead of a size_t as it's length arg.

either it needs to change, or it needs an explicit check for < 1

I wonder how many other paths make it possible to pass negative numbers here.

Dave

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Toralf Förster

author

2013-03-14 21:24 UTC #5 lore raw

Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

Quoted 5 lines · Dave Jones

hah, strndup_user taking a signed long instead of a size_t as it's length arg.
either it needs to change, or it needs an explicit check for < 1
I wonder how many other paths make it possible to pass negative numbers here.

just for the statistics - currently -14 rules :

2013-03-14T22:06:21.618+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: 28
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:37.533+01:00 trinity kernel: memdup_user: 3
2013-03-14T22:08:03.379+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:09:34.668+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:12:33.277+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:13:15.214+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:14:18.874+01:00 trinity kernel: trinity-watchdo[1169]: segfault at 244 ip 0804c956 sp bf836c9c error 4 in trinity[8048000+1d000]
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:50.351+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:59.411+01:00 trinity kernel: memdup_user: -14

:-D

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MfG/Sincerely
Toralf FA?rster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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richard -rw- weinberger

2013-03-14 23:10 UTC #6 lore raw

Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

Quoted 9 lines · Toralf Förster

Quoted 5 lines · Dave Jones
hah, strndup_user taking a signed long instead of a size_t as it's length arg.
either it needs to change, or it needs an explicit check for < 1
I wonder how many other paths make it possible to pass negative numbers here.
just for the statistics - currently -14 rules :

Quoted 14 lines

2013-03-14T22:06:21.618+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: 28
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:37.533+01:00 trinity kernel: memdup_user: 3
2013-03-14T22:08:03.379+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:09:34.668+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:12:33.277+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:13:15.214+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:14:18.874+01:00 trinity kernel: trinity-watchdo[1169]: segfault at 244 ip 0804c956 sp bf836c9c error 4 in trinity[8048000+1d000]
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:50.351+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:59.411+01:00 trinity kernel: memdup_user: -14

-14 is -EFAULT.
Time to look at UML's __get_user().

Signature · 8 lines

Thanks,
//richard

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Toralf Förster

author

2013-03-15 18:44 UTC #7 lore raw

Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

Quoted 1 line · richard -rw- weinberger

Time to look at UML's __get_user().

Just FWIW the "memdup_user:" debug-patch-line is not only triggered by trinity. It happens even if I regularly boot a UML guest (stable Gentoo x86):

$ /usr/local/bin/linux-v3.9-rc2-292-ga2362d2 earlyprintk ubda=/home/tfoerste/virtual/uml/trinity ubdb=/mnt/ramdisk/swap_trinity eth0=tuntap,tap0,72:ef:3d:9f:c3:5a mem=768M con=pts con0=fd:0,fd:1 umid=uml 
Locating the bottom of the address space ... 0x1000
Locating the top of the address space ... 0xc0000000
Core dump limits :
        soft - NONE
        hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking for tmpfs mount on /dev/shm...OK
Checking PROT_EXEC mmap in /dev/shm/...OK
Checking for the skas3 patch in the host:
  - /proc/mm...not found: No such file or directory
  - PTRACE_FAULTINFO...not found
  - PTRACE_LDT...not found
UML running in SKAS0 mode
Adding 9842688 bytes to physical memory to account for exec-shield gap
bootconsole [earlycon0] enabled
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 768308k available
SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:15
Calibrating delay loop... 3461.12 BogoMIPS (lpj=17305600)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
Checking for host processor cmov support...Yes
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
memdup_user: 9
memdup_user: 9
devtmpfs: initialized
Using 2.6 host AIO
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
Switching to clocksource itimer
NET: Registered protocol family 2
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP: reno registered
UDP hash table entries: 512 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 512 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
mconsole (version 2) initialized on /home/tfoerste/.uml/uml/mconsole
Checking host MADV_REMOVE support...OK
UML Audio Relay (host dsp = /dev/sound/dsp, host mixer = /dev/sound/mixer)
Host TLS support detected
Detected host type: i386 (GDT indexes 6 to 9)
audit: initializing netlink socket (disabled)
type=2000 audit(1363372747.842:1): initialized
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
nfs4filelayout_init: NFSv4 File Layout Driver Registering...
Installing knfsd (copyright (C) 1996 [email protected]).
msgmni has been set to 1500
alg: No test for stdrng (krng)
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
io scheduler noop registered (default)
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <[email protected]>
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.24.0-ioctl (2013-01-15) initialised: [email protected]
TCP: cubic registered
NET: Registered protocol family 17
Key type dns_resolver registered
Initialized stdio console driver
Console initialized on /dev/tty0
                                console [tty0] enabled, bootconsole disabled
console [tty0] enabled, bootconsole disabled
                                            Initializing software serial port version 1
console [mc-1] enabled
 ubda: unknown partition table
 ubdb: unknown partition table
Netdevice 0 (72:ef:3d:9f:c3:5a) : 
TUN/TAP backend - 
memdup_user: 5
memdup_user: 10
EXT3-fs (ubda): error: couldn't mount because of unsupported optional features (240)
memdup_user: 5
memdup_user: 10
EXT2-fs (ubda): error: couldn't mount because of unsupported optional features (244)
memdup_user: 5
memdup_user: 10
EXT4-fs (ubda): INFO: recovery required on readonly filesystem
EXT4-fs (ubda): write access will be enabled during recovery
EXT4-fs (ubda): orphan cleanup on readonly fs
EXT4-fs (ubda): 60 orphan inodes deleted
EXT4-fs (ubda): recovery complete
EXT4-fs (ubda): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) readonly on device 98:0.
memdup_user: 9
memdup_user: 9
devtmpfs: mounted
memdup_user: 2
INIT: version 2.88 booting

OpenRC 0.11.8 is starting up Gentoo Linux (i686) [UML]

* Mounting /proc ...
memdup_user: 5
memdup_user: 5
[ ok ]
* Mounting /run ...
memdup_user: 6
memdup_user: 6
* /run/openrc: creating directory
* /run/lock: creating directory
* /run/lock: correcting owner
* Using /dev mounted from kernel ...
[ ok ]
* Mounting /dev/pts ...
memdup_user: 7
memdup_user: 7
[ ok ]
* Mounting /dev/shm ...
memdup_user: 6
memdup_user: 4
[ ok ]
* Mounting /sys ...
[ ok ]
* Mounting cgroup filesystem ...
[ ok ]
* Starting udev ...
[ ok ]
* Populating /dev with existing devices through uevents ... [ ok ]
* Waiting for uevents to be processed ...
[ ok ]
* Setting up dm-crypt mappings ...
* crypt-swap using: -c aes -h sha1 -d /dev/urandom create crypt-swap /dev/ubdb ...
[ ok ]
* pre_mount: mkswap ${dev} ...
[ ok ]
[ ok ]
* Checking local filesystems ...
stable: clean, 93039/122160 files, 318314/488281 blocks
[ ok ]
* Remounting root filesystem read/write ...

Signature · 9 lines

MfG/Sincerely
Toralf FA?rster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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