I encountered the same problem with qemu/kvm but can't even login, I get random segfaults and even failed malloc assertions in /sbin/init, /sbin/rc or /bin/login (never past this).
But it works fine with CONFIG_PAX_MEMORY_UDEREF disabled. Config that reproduces the problem. $ grep -P "(GRK|PAX)" linux-3.15.8-hardened/.config CONFIG_PAX_KERNEXEC_PLUGIN=y CONFIG_PAX_PER_CPU_PGD=y CONFIG_PAX_USERCOPY_SLABS=y CONFIG_GRKERNSEC=y CONFIG_GRKERNSEC_CONFIG_AUTO=y # CONFIG_GRKERNSEC_CONFIG_CUSTOM is not set CONFIG_GRKERNSEC_CONFIG_SERVER=y # CONFIG_GRKERNSEC_CONFIG_DESKTOP is not set # CONFIG_GRKERNSEC_CONFIG_VIRT_NONE is not set CONFIG_GRKERNSEC_CONFIG_VIRT_GUEST=y # CONFIG_GRKERNSEC_CONFIG_VIRT_HOST is not set CONFIG_GRKERNSEC_CONFIG_VIRT_EPT=y # CONFIG_GRKERNSEC_CONFIG_VIRT_SOFT is not set # CONFIG_GRKERNSEC_CONFIG_VIRT_XEN is not set # CONFIG_GRKERNSEC_CONFIG_VIRT_VMWARE is not set CONFIG_GRKERNSEC_CONFIG_VIRT_KVM=y # CONFIG_GRKERNSEC_CONFIG_VIRT_VIRTUALBOX is not set # CONFIG_GRKERNSEC_CONFIG_PRIORITY_PERF is not set CONFIG_GRKERNSEC_CONFIG_PRIORITY_SECURITY=y CONFIG_GRKERNSEC_PROC_GID=10 CONFIG_GRKERNSEC_TPE_UNTRUSTED_GID=100 CONFIG_GRKERNSEC_SYMLINKOWN_GID=100 CONFIG_PAX=y # CONFIG_PAX_SOFTMODE is not set CONFIG_PAX_PT_PAX_FLAGS=y CONFIG_PAX_XATTR_PAX_FLAGS=y # CONFIG_PAX_NO_ACL_FLAGS is not set CONFIG_PAX_HAVE_ACL_FLAGS=y # CONFIG_PAX_HOOK_ACL_FLAGS is not set CONFIG_PAX_NOEXEC=y CONFIG_PAX_PAGEEXEC=y CONFIG_PAX_EMUTRAMP=y CONFIG_PAX_MPROTECT=y # CONFIG_PAX_MPROTECT_COMPAT is not set # CONFIG_PAX_ELFRELOCS is not set CONFIG_PAX_KERNEXEC=y CONFIG_PAX_KERNEXEC_PLUGIN_METHOD_BTS=y CONFIG_PAX_KERNEXEC_PLUGIN_METHOD="bts" CONFIG_PAX_ASLR=y # CONFIG_PAX_RANDKSTACK is not set CONFIG_PAX_RANDUSTACK=y CONFIG_PAX_RANDMMAP=y CONFIG_PAX_MEMORY_SANITIZE=y CONFIG_PAX_MEMORY_STACKLEAK=y CONFIG_PAX_MEMORY_STRUCTLEAK=y CONFIG_PAX_MEMORY_UDEREF=y CONFIG_PAX_REFCOUNT=y CONFIG_PAX_CONSTIFY_PLUGIN=y CONFIG_PAX_USERCOPY=y # CONFIG_PAX_USERCOPY_DEBUG is not set CONFIG_PAX_SIZE_OVERFLOW=y CONFIG_PAX_LATENT_ENTROPY=y CONFIG_GRKERNSEC_KMEM=y CONFIG_GRKERNSEC_IO=y CONFIG_GRKERNSEC_PERF_HARDEN=y CONFIG_GRKERNSEC_RAND_THREADSTACK=y CONFIG_GRKERNSEC_PROC_MEMMAP=y CONFIG_GRKERNSEC_KSTACKOVERFLOW=y CONFIG_GRKERNSEC_BRUTE=y CONFIG_GRKERNSEC_HIDESYM=y CONFIG_GRKERNSEC_RANDSTRUCT=y # CONFIG_GRKERNSEC_RANDSTRUCT_PERFORMANCE is not set # CONFIG_GRKERNSEC_KERN_LOCKOUT is not set CONFIG_GRKERNSEC_NO_RBAC=y CONFIG_GRKERNSEC_ACL_HIDEKERN=y CONFIG_GRKERNSEC_ACL_MAXTRIES=3 CONFIG_GRKERNSEC_ACL_TIMEOUT=30 CONFIG_GRKERNSEC_PROC=y # CONFIG_GRKERNSEC_PROC_USER is not set CONFIG_GRKERNSEC_PROC_USERGROUP=y CONFIG_GRKERNSEC_PROC_ADD=y CONFIG_GRKERNSEC_LINK=y CONFIG_GRKERNSEC_SYMLINKOWN=y CONFIG_GRKERNSEC_FIFO=y CONFIG_GRKERNSEC_SYSFS_RESTRICT=y # CONFIG_GRKERNSEC_ROFS is not set CONFIG_GRKERNSEC_DEVICE_SIDECHANNEL=y CONFIG_GRKERNSEC_CHROOT=y CONFIG_GRKERNSEC_CHROOT_MOUNT=y CONFIG_GRKERNSEC_CHROOT_DOUBLE=y CONFIG_GRKERNSEC_CHROOT_PIVOT=y CONFIG_GRKERNSEC_CHROOT_CHDIR=y CONFIG_GRKERNSEC_CHROOT_CHMOD=y CONFIG_GRKERNSEC_CHROOT_FCHDIR=y CONFIG_GRKERNSEC_CHROOT_MKNOD=y CONFIG_GRKERNSEC_CHROOT_SHMAT=y CONFIG_GRKERNSEC_CHROOT_UNIX=y CONFIG_GRKERNSEC_CHROOT_FINDTASK=y CONFIG_GRKERNSEC_CHROOT_NICE=y CONFIG_GRKERNSEC_CHROOT_SYSCTL=y CONFIG_GRKERNSEC_CHROOT_CAPS=y # CONFIG_GRKERNSEC_AUDIT_GROUP is not set CONFIG_GRKERNSEC_EXECLOG=y CONFIG_GRKERNSEC_RESLOG=y CONFIG_GRKERNSEC_CHROOT_EXECLOG=y # CONFIG_GRKERNSEC_AUDIT_PTRACE is not set # CONFIG_GRKERNSEC_AUDIT_CHDIR is not set # CONFIG_GRKERNSEC_AUDIT_MOUNT is not set CONFIG_GRKERNSEC_SIGNAL=y # CONFIG_GRKERNSEC_FORKFAIL is not set CONFIG_GRKERNSEC_TIME=y CONFIG_GRKERNSEC_PROC_IPADDR=y CONFIG_GRKERNSEC_RWXMAP_LOG=y CONFIG_GRKERNSEC_DMESG=y CONFIG_GRKERNSEC_HARDEN_PTRACE=y CONFIG_GRKERNSEC_PTRACE_READEXEC=y CONFIG_GRKERNSEC_SETXID=y CONFIG_GRKERNSEC_HARDEN_IPC=y CONFIG_GRKERNSEC_TPE=y # CONFIG_GRKERNSEC_TPE_ALL is not set # CONFIG_GRKERNSEC_TPE_INVERT is not set CONFIG_GRKERNSEC_TPE_GID=100 CONFIG_GRKERNSEC_RANDNET=y CONFIG_GRKERNSEC_BLACKHOLE=y CONFIG_GRKERNSEC_NO_SIMULT_CONNECT=y # CONFIG_GRKERNSEC_SOCKET is not set # CONFIG_GRKERNSEC_SYSCTL is not set CONFIG_GRKERNSEC_FLOODTIME=10 CONFIG_GRKERNSEC_FLOODBURST=6 On Tue, 26 Aug 2014 11:24:26 +0100 Marcin Mirosław <[email protected]> wrote: > Hello! > I suspect that I've got problem with hardened-sources in KVM VM. I'm > not sure if I should fill a bug for this. I'd like to post it here > before using b.g.o. > I've got VM (it's KVM with qemu-2.0.0-r1), with > hardened-sources-3.15.{5-r2,8}. I'm observing a kind of memory > corruption. After a couple of hours of uptime I'm starting seeing > random segfaults, general protection traps especially when process > uses a lot of CPU and do many I/O operations (masscheck scripts > written in perl for spamassasin rules). > In log I've got e.g.: > > 2014-08-25T13:05:23.243062+02:00 mohikanin kernel: [45571.239703] PAX: > >From 88.198.102.195: execution attempt in: (null), 00000000-00000000 > 00000000 > 2014-08-25T13:05:23.243088+02:00 mohikanin kernel: [45571.239707] PAX: > terminating task: /usr/libexec/dovecot/pop3-login(pop3-login):2507, > uid/euid: 105/105, PC: (nil), SP: 000003a8574e4c00 > 2014-08-25T13:05:23.243093+02:00 mohikanin kernel: [45571.239709] PAX: > bytes at > PC: ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? > 2014-08-25T13:05:23.243095+02:00 mohikanin kernel: [45571.239735] > PAX: bytes at SP-8: 0000000000000000 0000000000000000 > 00000059c6deceb0 0000000000000000 00000316027bc540 0000000000000001 > 000003160271dbb5 0000000000000000 0000000000000000 0000000000000000 > 0000000000000000 2014-08-25T13:24:42.943001+02:00 mohikanin kernel: > [46730.931353] traps: spamd child[19681] general protection > ip:2c572b6e163 sp:3ca7d000be0 error:0 in > libc-2.19.so[2c572aee000+19e000] 2014-08-25T13:24:42.943007+02:00 > mohikanin kernel: [46730.931371] grsec: Segmentation fault occurred > at (nil) in /usr/sbin/spamd[spamd child:19681] > uid/euid:999/999 gid/egid:100/100, > parent /usr/sbin/spamd[/usr/sbin/spamd:1255] uid/euid:0/0 > gid/egid:0/0 2014-08-25T13:55:22.383032+02:00 mohikanin kernel: > [48570.375917] traps: freshclam[6594] general protection > ip:344cceb368d sp:3d5f5ced520 error:0 in > libclamav.so.6.1.23[344ccdf1000+9d1000] > 2014-08-25T13:55:22.383050+02:00 mohikanin kernel: [48570.375968] > grsec: Segmentation fault occurred at (nil) > in /usr/bin/freshclam[freshclam:6594] uid/euid:104/104 > gid/egid:115/115, parent /usr/bin/freshclam[freshclam:1159] > uid/euid:104/104 gid/egid:115/115 > > Yesterday I switched kernel to gentoo-sources-3.14.14 and I don't see > any unwanted behavior. This is why I suspect hardened-sources. Should > I fill a bug? What should I do help find out the root of problem? > (gcc is: gcc version 4.7.3 (Gentoo Hardened 4.7.3-r1 p1.4, > pie-0.5.5) , with ld.gold) > > Marcin > > # grep -P "(GRK|PAX)" /boot/config-3.15.8-hardened > CONFIG_PAX_KERNEXEC_PLUGIN=y > CONFIG_PAX_PER_CPU_PGD=y > CONFIG_PAX_USERCOPY_SLABS=y > CONFIG_GRKERNSEC=y > CONFIG_GRKERNSEC_CONFIG_AUTO=y > # CONFIG_GRKERNSEC_CONFIG_CUSTOM is not set > CONFIG_GRKERNSEC_CONFIG_SERVER=y > # CONFIG_GRKERNSEC_CONFIG_DESKTOP is not set > # CONFIG_GRKERNSEC_CONFIG_VIRT_NONE is not set > CONFIG_GRKERNSEC_CONFIG_VIRT_GUEST=y > # CONFIG_GRKERNSEC_CONFIG_VIRT_HOST is not set > CONFIG_GRKERNSEC_CONFIG_VIRT_EPT=y > # CONFIG_GRKERNSEC_CONFIG_VIRT_SOFT is not set > # CONFIG_GRKERNSEC_CONFIG_VIRT_XEN is not set > # CONFIG_GRKERNSEC_CONFIG_VIRT_VMWARE is not set > CONFIG_GRKERNSEC_CONFIG_VIRT_KVM=y > # CONFIG_GRKERNSEC_CONFIG_VIRT_VIRTUALBOX is not set > CONFIG_GRKERNSEC_CONFIG_PRIORITY_PERF=y > # CONFIG_GRKERNSEC_CONFIG_PRIORITY_SECURITY is not set > CONFIG_GRKERNSEC_PROC_GID=55555 > CONFIG_GRKERNSEC_TPE_TRUSTED_GID=55555 > CONFIG_GRKERNSEC_SYMLINKOWN_GID=100 > CONFIG_PAX=y > # CONFIG_PAX_SOFTMODE is not set > # CONFIG_PAX_PT_PAX_FLAGS is not set > CONFIG_PAX_XATTR_PAX_FLAGS=y > # CONFIG_PAX_NO_ACL_FLAGS is not set > CONFIG_PAX_HAVE_ACL_FLAGS=y > # CONFIG_PAX_HOOK_ACL_FLAGS is not set > CONFIG_PAX_NOEXEC=y > CONFIG_PAX_PAGEEXEC=y > CONFIG_PAX_EMUTRAMP=y > CONFIG_PAX_MPROTECT=y > # CONFIG_PAX_MPROTECT_COMPAT is not set > # CONFIG_PAX_ELFRELOCS is not set > CONFIG_PAX_KERNEXEC=y > CONFIG_PAX_KERNEXEC_PLUGIN_METHOD_BTS=y > CONFIG_PAX_KERNEXEC_PLUGIN_METHOD="bts" > CONFIG_PAX_ASLR=y > CONFIG_PAX_RANDKSTACK=y > CONFIG_PAX_RANDUSTACK=y > CONFIG_PAX_RANDMMAP=y > # CONFIG_PAX_MEMORY_SANITIZE is not set > CONFIG_PAX_MEMORY_STACKLEAK=y > CONFIG_PAX_MEMORY_STRUCTLEAK=y > CONFIG_PAX_MEMORY_UDEREF=y > CONFIG_PAX_REFCOUNT=y > CONFIG_PAX_CONSTIFY_PLUGIN=y > CONFIG_PAX_USERCOPY=y > # CONFIG_PAX_USERCOPY_DEBUG is not set > CONFIG_PAX_SIZE_OVERFLOW=y > CONFIG_PAX_LATENT_ENTROPY=y > CONFIG_GRKERNSEC_KMEM=y > CONFIG_GRKERNSEC_IO=y > CONFIG_GRKERNSEC_JIT_HARDEN=y > CONFIG_GRKERNSEC_PERF_HARDEN=y > CONFIG_GRKERNSEC_RAND_THREADSTACK=y > CONFIG_GRKERNSEC_PROC_MEMMAP=y > CONFIG_GRKERNSEC_KSTACKOVERFLOW=y > # CONFIG_GRKERNSEC_BRUTE is not set > CONFIG_GRKERNSEC_MODHARDEN=y > CONFIG_GRKERNSEC_HIDESYM=y > CONFIG_GRKERNSEC_RANDSTRUCT=y > CONFIG_GRKERNSEC_RANDSTRUCT_PERFORMANCE=y > # CONFIG_GRKERNSEC_KERN_LOCKOUT is not set > CONFIG_GRKERNSEC_NO_RBAC=y > # CONFIG_GRKERNSEC_ACL_HIDEKERN is not set > CONFIG_GRKERNSEC_ACL_MAXTRIES=3 > CONFIG_GRKERNSEC_ACL_TIMEOUT=30 > CONFIG_GRKERNSEC_PROC=y > CONFIG_GRKERNSEC_PROC_USER=y > CONFIG_GRKERNSEC_PROC_ADD=y > CONFIG_GRKERNSEC_LINK=y > CONFIG_GRKERNSEC_SYMLINKOWN=y > CONFIG_GRKERNSEC_FIFO=y > CONFIG_GRKERNSEC_SYSFS_RESTRICT=y > # CONFIG_GRKERNSEC_ROFS is not set > CONFIG_GRKERNSEC_DEVICE_SIDECHANNEL=y > CONFIG_GRKERNSEC_CHROOT=y > CONFIG_GRKERNSEC_CHROOT_MOUNT=y > CONFIG_GRKERNSEC_CHROOT_DOUBLE=y > CONFIG_GRKERNSEC_CHROOT_PIVOT=y > CONFIG_GRKERNSEC_CHROOT_CHDIR=y > CONFIG_GRKERNSEC_CHROOT_CHMOD=y > CONFIG_GRKERNSEC_CHROOT_FCHDIR=y > CONFIG_GRKERNSEC_CHROOT_MKNOD=y > CONFIG_GRKERNSEC_CHROOT_SHMAT=y > CONFIG_GRKERNSEC_CHROOT_UNIX=y > CONFIG_GRKERNSEC_CHROOT_FINDTASK=y > CONFIG_GRKERNSEC_CHROOT_NICE=y > CONFIG_GRKERNSEC_CHROOT_SYSCTL=y > CONFIG_GRKERNSEC_CHROOT_CAPS=y > CONFIG_GRKERNSEC_CHROOT_INITRD=y > # CONFIG_GRKERNSEC_AUDIT_GROUP is not set > # CONFIG_GRKERNSEC_EXECLOG is not set > CONFIG_GRKERNSEC_RESLOG=y > # CONFIG_GRKERNSEC_CHROOT_EXECLOG is not set > # CONFIG_GRKERNSEC_AUDIT_PTRACE is not set > # CONFIG_GRKERNSEC_AUDIT_CHDIR is not set > CONFIG_GRKERNSEC_AUDIT_MOUNT=y > CONFIG_GRKERNSEC_SIGNAL=y > CONFIG_GRKERNSEC_FORKFAIL=y > CONFIG_GRKERNSEC_TIME=y > CONFIG_GRKERNSEC_PROC_IPADDR=y > CONFIG_GRKERNSEC_RWXMAP_LOG=y > CONFIG_GRKERNSEC_DMESG=y > CONFIG_GRKERNSEC_HARDEN_PTRACE=y > CONFIG_GRKERNSEC_PTRACE_READEXEC=y > CONFIG_GRKERNSEC_SETXID=y > CONFIG_GRKERNSEC_HARDEN_IPC=y > CONFIG_GRKERNSEC_TPE=y > CONFIG_GRKERNSEC_TPE_ALL=y > CONFIG_GRKERNSEC_TPE_INVERT=y > CONFIG_GRKERNSEC_TPE_GID=55555 > CONFIG_GRKERNSEC_RANDNET=y > CONFIG_GRKERNSEC_BLACKHOLE=y > CONFIG_GRKERNSEC_NO_SIMULT_CONNECT=y > # CONFIG_GRKERNSEC_SOCKET is not set > CONFIG_GRKERNSEC_SYSCTL=y > # CONFIG_GRKERNSEC_SYSCTL_DISTRO is not set > CONFIG_GRKERNSEC_SYSCTL_ON=y > CONFIG_GRKERNSEC_FLOODTIME=10 > CONFIG_GRKERNSEC_FLOODBURST=6 > -- André Aparício [email protected] Administração de Sistemas da Rede das Novas Licenciaturas Técnico Lisboa web: http://www.rnl.tecnico.ulisboa.pt email: [email protected] telefone: +351 218 41 77 71
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