"Oliver O'Halloran" <ooh...@gmail.com> writes: > On Fri, Sep 20, 2019 at 6:28 AM Nathan Lynch <nath...@linux.ibm.com> wrote: >> >> Hello Sam, >> >> Sam Bobroff <sbobr...@linux.ibm.com> writes: >> >> With this change, I get a crash (use after free by the looks of it) when >> I remove and then add a pci device in qemu: >> >> $ qemu-system-ppc64 -M pseries -append 'debug console=hvc0' \ >> -nographic -vga none -m 1G,slots=32,maxmem=1024G -smp 2 \ >> -kernel vmlinux -initrd ~/b/br/ppc64le-initramfs/images/rootfs.cpio \ >> -nic model=e1000 > > is there anything special in your kernel config? I tested this with > pseries_le_defconfig and couldn't hit the crash.
My config is below; CONFIG_SLUB_DEBUG_ON=y probably makes the difference. CONFIG_SYSVIPC=y CONFIG_POSIX_MQUEUE=y CONFIG_AUDIT=y CONFIG_NO_HZ=y CONFIG_HIGH_RES_TIMERS=y CONFIG_TASKSTATS=y CONFIG_TASK_DELAY_ACCT=y CONFIG_TASK_XACCT=y CONFIG_TASK_IO_ACCOUNTING=y CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_LOG_BUF_SHIFT=18 CONFIG_LOG_CPU_MAX_BUF_SHIFT=13 CONFIG_NUMA_BALANCING=y CONFIG_CGROUPS=y CONFIG_MEMCG=y CONFIG_MEMCG_SWAP=y CONFIG_CGROUP_SCHED=y CONFIG_CGROUP_FREEZER=y CONFIG_CPUSETS=y CONFIG_CGROUP_DEVICE=y CONFIG_CGROUP_CPUACCT=y CONFIG_CGROUP_PERF=y CONFIG_CGROUP_BPF=y CONFIG_USER_NS=y CONFIG_BLK_DEV_INITRD=y CONFIG_INITRAMFS_SOURCE="rootfs.cpio" CONFIG_BPF_SYSCALL=y # CONFIG_COMPAT_BRK is not set CONFIG_PROFILING=y CONFIG_PPC64=y CONFIG_NR_CPUS=2048 CONFIG_CPU_LITTLE_ENDIAN=y CONFIG_PPC_SPLPAR=y CONFIG_DTL=y CONFIG_SCANLOG=y CONFIG_PPC_SMLPAR=y CONFIG_RTAS_FLASH=y CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y CONFIG_HZ_100=y CONFIG_PPC_TRANSACTIONAL_MEM=y CONFIG_KEXEC=y CONFIG_KEXEC_FILE=y CONFIG_IRQ_ALL_CPUS=y CONFIG_PPC_64K_PAGES=y CONFIG_PPC_SUBPAGE_PROT=y CONFIG_SCHED_SMT=y CONFIG_PM_DEBUG=y CONFIG_VIRTUALIZATION=y CONFIG_KVM_BOOK3S_64=y CONFIG_KVM_BOOK3S_64_HV=y CONFIG_VHOST_NET=y CONFIG_OPROFILE=y CONFIG_KPROBES=y CONFIG_JUMP_LABEL=y CONFIG_REFCOUNT_FULL=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y CONFIG_MODVERSIONS=y CONFIG_MODULE_SRCVERSION_ALL=y CONFIG_PARTITION_ADVANCED=y CONFIG_BINFMT_MISC=y CONFIG_MEMORY_HOTPLUG=y CONFIG_MEMORY_HOTREMOVE=y CONFIG_KSM=y CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_NET=y CONFIG_PACKET=y CONFIG_UNIX=y CONFIG_XFRM_USER=y CONFIG_NET_KEY=y CONFIG_INET=y CONFIG_IP_MULTICAST=y CONFIG_NET_IPIP=y CONFIG_SYN_COOKIES=y CONFIG_INET_AH=y CONFIG_INET_ESP=y CONFIG_INET_IPCOMP=y # CONFIG_IPV6 is not set CONFIG_NETFILTER=y # CONFIG_NETFILTER_ADVANCED is not set CONFIG_NF_CONNTRACK=y CONFIG_NF_CONNTRACK_FTP=y CONFIG_NF_CONNTRACK_IRC=y CONFIG_NF_CONNTRACK_SIP=y CONFIG_NF_CT_NETLINK=y CONFIG_NETFILTER_XT_MARK=y CONFIG_NETFILTER_XT_TARGET_LOG=y CONFIG_NETFILTER_XT_TARGET_NFLOG=y CONFIG_NETFILTER_XT_TARGET_TCPMSS=y CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=y CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y CONFIG_NETFILTER_XT_MATCH_POLICY=y CONFIG_NETFILTER_XT_MATCH_STATE=y CONFIG_NF_LOG_ARP=y CONFIG_IP_NF_IPTABLES=y CONFIG_IP_NF_FILTER=y CONFIG_IP_NF_TARGET_REJECT=y CONFIG_IP_NF_NAT=y CONFIG_IP_NF_TARGET_MASQUERADE=y CONFIG_IP_NF_MANGLE=y CONFIG_BRIDGE=y CONFIG_VLAN_8021Q=y CONFIG_NET_SCHED=y CONFIG_NET_CLS_BPF=y CONFIG_NET_CLS_ACT=y CONFIG_NET_ACT_BPF=y CONFIG_BPF_JIT=y CONFIG_HOTPLUG_PCI=y CONFIG_HOTPLUG_PCI_RPA=y CONFIG_HOTPLUG_PCI_RPA_DLPAR=y CONFIG_UEVENT_HELPER=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y CONFIG_OF_UNITTEST=y CONFIG_PARPORT=y CONFIG_PARPORT_PC=y CONFIG_BLK_DEV_FD=y CONFIG_BLK_DEV_LOOP=y CONFIG_BLK_DEV_NBD=y CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_SIZE=65536 CONFIG_VIRTIO_BLK=y CONFIG_CXL=y CONFIG_OCXL=y CONFIG_BLK_DEV_SD=y CONFIG_CHR_DEV_ST=y CONFIG_BLK_DEV_SR=y CONFIG_BLK_DEV_SR_VENDOR=y CONFIG_CHR_DEV_SG=y CONFIG_SCSI_CONSTANTS=y CONFIG_SCSI_FC_ATTRS=y CONFIG_SCSI_CXGB3_ISCSI=y CONFIG_SCSI_CXGB4_ISCSI=y CONFIG_SCSI_BNX2_ISCSI=y CONFIG_BE2ISCSI=y CONFIG_CXLFLASH=y CONFIG_SCSI_MPT2SAS=y CONFIG_SCSI_IBMVSCSI=y CONFIG_SCSI_IBMVFC=y CONFIG_SCSI_SYM53C8XX_2=y CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=0 CONFIG_SCSI_IPR=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA_ISCSI=y CONFIG_SCSI_LPFC=y CONFIG_SCSI_VIRTIO=y CONFIG_SCSI_DH=y CONFIG_SCSI_DH_RDAC=y CONFIG_SCSI_DH_ALUA=y CONFIG_ATA=y CONFIG_SATA_AHCI=y CONFIG_PATA_AMD=y CONFIG_ATA_GENERIC=y CONFIG_MD=y CONFIG_BLK_DEV_MD=y CONFIG_MD_LINEAR=y CONFIG_MD_RAID0=y CONFIG_MD_RAID1=y CONFIG_MD_RAID10=y CONFIG_MD_RAID456=y CONFIG_MD_MULTIPATH=y CONFIG_MD_FAULTY=y CONFIG_BLK_DEV_DM=y CONFIG_DM_CRYPT=y CONFIG_DM_SNAPSHOT=y CONFIG_DM_THIN_PROVISIONING=y CONFIG_DM_MIRROR=y CONFIG_DM_ZERO=y CONFIG_DM_MULTIPATH=y CONFIG_DM_MULTIPATH_QL=y CONFIG_DM_MULTIPATH_ST=y CONFIG_DM_UEVENT=y CONFIG_BONDING=y CONFIG_DUMMY=y CONFIG_MACVLAN=y CONFIG_MACVTAP=y CONFIG_VXLAN=y CONFIG_NETCONSOLE=y CONFIG_TUN=y CONFIG_VETH=y CONFIG_VIRTIO_NET=y CONFIG_VORTEX=y CONFIG_ACENIC=y CONFIG_ACENIC_OMIT_TIGON_I=y CONFIG_PCNET32=y CONFIG_TIGON3=y CONFIG_BNX2X=y CONFIG_CHELSIO_T1=y CONFIG_BE2NET=y CONFIG_IBMVETH=y CONFIG_E100=y CONFIG_E1000=y CONFIG_E1000E=y CONFIG_IXGB=y CONFIG_IXGBE=y CONFIG_I40E=y CONFIG_MLX4_EN=y CONFIG_MYRI10GE=y CONFIG_S2IO=y CONFIG_QLGE=y CONFIG_NETXEN_NIC=y CONFIG_PPP=y CONFIG_PPP_BSDCOMP=y CONFIG_PPP_DEFLATE=y CONFIG_PPPOE=y CONFIG_PPP_ASYNC=y CONFIG_PPP_SYNC_TTY=y CONFIG_INPUT_EVDEV=y CONFIG_INPUT_MISC=y CONFIG_INPUT_PCSPKR=y # CONFIG_SERIO_SERPORT is not set CONFIG_SERIAL_8250=y CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_ICOM=y CONFIG_SERIAL_JSM=y CONFIG_HVC_CONSOLE=y CONFIG_HVC_RTAS=y CONFIG_HVCS=y CONFIG_VIRTIO_CONSOLE=y CONFIG_IBM_BSR=y CONFIG_POWERNV_OP_PANEL=y CONFIG_HW_RANDOM=y CONFIG_RAW_DRIVER=y CONFIG_MAX_RAW_DEVS=1024 CONFIG_I2C_CHARDEV=y CONFIG_FB=y CONFIG_FIRMWARE_EDID=y CONFIG_FB_OF=y CONFIG_FB_MATROX=y CONFIG_FB_MATROX_MILLENIUM=y CONFIG_FB_MATROX_MYSTIQUE=y CONFIG_FB_MATROX_G=y CONFIG_FB_RADEON=y CONFIG_FB_IBM_GXT4500=y CONFIG_LCD_CLASS_DEVICE=y CONFIG_LCD_PLATFORM=y # CONFIG_VGA_CONSOLE is not set CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_LOGO=y CONFIG_HID_GYRATION=y CONFIG_HID_PANTHERLORD=y CONFIG_HID_PETALYNX=y CONFIG_HID_SAMSUNG=y CONFIG_HID_SUNPLUS=y CONFIG_USB_HIDDEV=y CONFIG_USB=y CONFIG_USB_MON=y CONFIG_USB_XHCI_HCD=y CONFIG_USB_EHCI_HCD=y # CONFIG_USB_EHCI_HCD_PPC_OF is not set CONFIG_USB_OHCI_HCD=y CONFIG_USB_STORAGE=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y CONFIG_LEDS_POWERNV=y CONFIG_INFINIBAND=y CONFIG_INFINIBAND_USER_MAD=y CONFIG_INFINIBAND_USER_ACCESS=y CONFIG_INFINIBAND_MTHCA=y CONFIG_INFINIBAND_CXGB3=y CONFIG_INFINIBAND_CXGB4=y CONFIG_MLX4_INFINIBAND=y CONFIG_INFINIBAND_IPOIB=y CONFIG_INFINIBAND_IPOIB_CM=y CONFIG_INFINIBAND_SRP=y CONFIG_INFINIBAND_ISER=y CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_GENERIC=y CONFIG_VIRTIO_PCI=y CONFIG_VIRTIO_BALLOON=y CONFIG_VALIDATE_FS_PARSER=y CONFIG_EXT2_FS=y CONFIG_EXT2_FS_XATTR=y CONFIG_EXT2_FS_POSIX_ACL=y CONFIG_EXT2_FS_SECURITY=y CONFIG_EXT4_FS=y CONFIG_EXT4_FS_POSIX_ACL=y CONFIG_EXT4_FS_SECURITY=y CONFIG_JFS_FS=y CONFIG_JFS_POSIX_ACL=y CONFIG_JFS_SECURITY=y CONFIG_XFS_FS=y CONFIG_XFS_POSIX_ACL=y CONFIG_BTRFS_FS=y CONFIG_BTRFS_FS_POSIX_ACL=y CONFIG_NILFS2_FS=y CONFIG_FS_DAX=y CONFIG_AUTOFS4_FS=y CONFIG_FUSE_FS=y CONFIG_OVERLAY_FS=y CONFIG_ISO9660_FS=y CONFIG_UDF_FS=y CONFIG_MSDOS_FS=y CONFIG_VFAT_FS=y CONFIG_PROC_KCORE=y CONFIG_TMPFS=y CONFIG_TMPFS_POSIX_ACL=y CONFIG_HUGETLBFS=y CONFIG_CRAMFS=y CONFIG_SQUASHFS=y CONFIG_SQUASHFS_XATTR=y CONFIG_SQUASHFS_LZO=y CONFIG_SQUASHFS_XZ=y CONFIG_PSTORE=y CONFIG_NFS_FS=y CONFIG_NFS_V3_ACL=y CONFIG_NFS_V4=y CONFIG_NFSD=y CONFIG_NFSD_V3_ACL=y CONFIG_NFSD_V4=y CONFIG_CIFS=y CONFIG_CIFS_XATTR=y CONFIG_CIFS_POSIX=y CONFIG_NLS_DEFAULT="utf8" CONFIG_NLS_CODEPAGE_437=y CONFIG_NLS_ASCII=y CONFIG_NLS_ISO8859_1=y CONFIG_NLS_UTF8=y CONFIG_CRYPTO_TEST=m CONFIG_CRYPTO_PCBC=y CONFIG_CRYPTO_CRC32C_VPMSUM=y CONFIG_CRYPTO_MD5_PPC=y CONFIG_CRYPTO_MICHAEL_MIC=y CONFIG_CRYPTO_SHA1_PPC=y CONFIG_CRYPTO_TGR192=y CONFIG_CRYPTO_WP512=y CONFIG_CRYPTO_ANUBIS=y CONFIG_CRYPTO_ARC4=y CONFIG_CRYPTO_BLOWFISH=y CONFIG_CRYPTO_CAST6=y CONFIG_CRYPTO_KHAZAD=y CONFIG_CRYPTO_SALSA20=y CONFIG_CRYPTO_SERPENT=y CONFIG_CRYPTO_TEA=y CONFIG_CRYPTO_TWOFISH=y CONFIG_CRYPTO_LZO=y CONFIG_CRYPTO_DEV_NX=y CONFIG_CRYPTO_DEV_VMX=y CONFIG_CRYPTO_DEV_VMX_ENCRYPT=y CONFIG_CRYPTO_DEV_VIRTIO=y CONFIG_PRINTK_TIME=y CONFIG_DYNAMIC_DEBUG=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_REDUCED=y CONFIG_GDB_SCRIPTS=y CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_PAGE_EXTENSION=y CONFIG_PAGE_POISONING=y CONFIG_SLUB_DEBUG_ON=y CONFIG_DEBUG_STACK_USAGE=y CONFIG_DEBUG_VM=y CONFIG_DEBUG_PER_CPU_MAPS=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_DEBUG_SHIRQ=y CONFIG_SOFTLOCKUP_DETECTOR=y CONFIG_HARDLOCKUP_DETECTOR=y CONFIG_WQ_WATCHDOG=y CONFIG_PANIC_ON_OOPS=y CONFIG_SCHED_STACK_END_CHECK=y CONFIG_PROVE_LOCKING=y CONFIG_DEBUG_ATOMIC_SLEEP=y CONFIG_DEBUG_LIST=y CONFIG_DEBUG_SG=y CONFIG_DEBUG_NOTIFIERS=y CONFIG_DEBUG_WQ_FORCE_RR_CPU=y CONFIG_LATENCYTOP=y CONFIG_FUNCTION_TRACER=y CONFIG_SCHED_TRACER=y CONFIG_BLK_DEV_IO_TRACE=y CONFIG_CODE_PATCHING_SELFTEST=y CONFIG_FTR_FIXUP_SELFTEST=y CONFIG_MSI_BITMAP_SELFTEST=y CONFIG_PPC_IRQ_SOFT_MASK_DEBUG=y
