Buildresult: linus/mips-defconfig/mips-gcc4.6 built on Aug 15 2018, 04:35

kisskb

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Status:	OK
Date/Time:	Aug 15 2018, 04:35
Duration:	0:01:46.045442
Builder:	ka4
Revision:	Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (`958f338e96f874a0d29442396d6adf9c1e17aa2d)`
Target:	linus/mips-defconfig/mips-gcc4.6
Branch:	linus
Compiler:	mips-gcc4.6 (mips-linux-gcc (GCC) 4.6.3)
Config:	defconfig (download)
Log:	Download original Possible warnings (8) kernel/rcu/srcutree.c:148:32: warning: 'levelspread[<U 1e0>]' may be used uninitialized in this function [-Wuninitialized] kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 958f338e96f874a0d29442396d6adf9c1e17aa2d^{commit} 958f338e96f874a0d29442396d6adf9c1e17aa2d already have revision, skipping fetch # git checkout -q -f -B kisskb 958f338e96f874a0d29442396d6adf9c1e17aa2d # git clean -qxdf # < git log -1 # commit 958f338e96f874a0d29442396d6adf9c1e17aa2d # Merge: 781fca5 07d981a # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Aug 14 09:46:06 2018 -0700 # # Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip # # Merge L1 Terminal Fault fixes from Thomas Gleixner: # "L1TF, aka L1 Terminal Fault, is yet another speculative hardware # engineering trainwreck. It's a hardware vulnerability which allows # unprivileged speculative access to data which is available in the # Level 1 Data Cache when the page table entry controlling the virtual # address, which is used for the access, has the Present bit cleared or # other reserved bits set. # # If an instruction accesses a virtual address for which the relevant # page table entry (PTE) has the Present bit cleared or other reserved # bits set, then speculative execution ignores the invalid PTE and loads # the referenced data if it is present in the Level 1 Data Cache, as if # the page referenced by the address bits in the PTE was still present # and accessible. # # While this is a purely speculative mechanism and the instruction will # raise a page fault when it is retired eventually, the pure act of # loading the data and making it available to other speculative # instructions opens up the opportunity for side channel attacks to # unprivileged malicious code, similar to the Meltdown attack. # # While Meltdown breaks the user space to kernel space protection, L1TF # allows to attack any physical memory address in the system and the # attack works across all protection domains. It allows an attack of SGX # and also works from inside virtual machines because the speculation # bypasses the extended page table (EPT) protection mechanism. # # The assoicated CVEs are: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646 # # The mitigations provided by this pull request include: # # - Host side protection by inverting the upper address bits of a non # present page table entry so the entry points to uncacheable memory. # # - Hypervisor protection by flushing L1 Data Cache on VMENTER. # # - SMT (HyperThreading) control knobs, which allow to 'turn off' SMT # by offlining the sibling CPU threads. The knobs are available on # the kernel command line and at runtime via sysfs # # - Control knobs for the hypervisor mitigation, related to L1D flush # and SMT control. The knobs are available on the kernel command line # and at runtime via sysfs # # - Extensive documentation about L1TF including various degrees of # mitigations. # # Thanks to all people who have contributed to this in various ways - # patches, review, testing, backporting - and the fruitful, sometimes # heated, but at the end constructive discussions. # # There is work in progress to provide other forms of mitigations, which # might be less horrible performance wise for a particular kind of # workloads, but this is not yet ready for consumption due to their # complexity and limitations" # # * 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits) # x86/microcode: Allow late microcode loading with SMT disabled # tools headers: Synchronise x86 cpufeatures.h for L1TF additions # x86/mm/kmmio: Make the tracer robust against L1TF # x86/mm/pat: Make set_memory_np() L1TF safe # x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert # x86/speculation/l1tf: Invert all not present mappings # cpu/hotplug: Fix SMT supported evaluation # KVM: VMX: Tell the nested hypervisor to skip L1D flush on vmentry # x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry # x86/speculation: Simplify sysfs report of VMX L1TF vulnerability # Documentation/l1tf: Remove Yonah processors from not vulnerable list # x86/KVM/VMX: Don't set l1tf_flush_l1d from vmx_handle_external_intr() # x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d # x86: Don't include linux/irq.h from asm/hardirq.h # x86/KVM/VMX: Introduce per-host-cpu analogue of l1tf_flush_l1d # x86/irq: Demote irq_cpustat_t::__softirq_pending to u16 # x86/KVM/VMX: Move the l1tf_flush_l1d test to vmx_l1d_flush() # x86/KVM/VMX: Replace 'vmx_l1d_flush_always' with 'vmx_l1d_flush_cond' # x86/KVM/VMX: Don't set l1tf_flush_l1d to true from vmx_l1d_flush() # cpu/hotplug: detect SMT disabled by BIOS # ... # < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-gcc --version # < git log --format=%s --max-count=1 958f338e96f874a0d29442396d6adf9c1e17aa2d # < make -s -j 120 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- defconfig # make -s -j 120 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- /kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25 /kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25 /kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields': /kisskb/src/kernel/rcu/srcutree.c:148:32: warning: 'levelspread[<U 1e0>]' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/rcu/srcutree.c:96:6: note: 'levelspread[<U 1e0>]' was declared here /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:339:21: note: 'pdeo' was declared here /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here /kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25 /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] FIT description: Linux 4.18.0-g958f338 Created: Wed Aug 15 04:37:18 2018 Image 0 (kernel@0) Description: Linux 4.18.0-g958f338 Created: Wed Aug 15 04:37:18 2018 Type: Kernel Image Compression: gzip compressed Data Size: 4237098 Bytes = 4137.79 kB = 4.04 MB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x807e7210 Hash algo: sha1 Hash value: fb75c3e99f71317fd4bbb05b852969dd4942b014 Image 1 (fdt@boston) Description: img,boston Device Tree Created: Wed Aug 15 04:37:18 2018 Type: Flat Device Tree Compression: uncompressed Data Size: 3668 Bytes = 3.58 kB = 0.00 MB Architecture: MIPS Hash algo: sha1 Hash value: 569c37cc891ce1e1f3a193cb41cc691a5d2debb5 Image 2 (fdt@ni169445) Description: NI 169445 device tree Created: Wed Aug 15 04:37:18 2018 Type: Flat Device Tree Compression: uncompressed Data Size: 1871 Bytes = 1.83 kB = 0.00 MB Architecture: MIPS Hash algo: sha1 Hash value: 51b89b31605ee62038c8468c429af091dfc75ec7 Image 3 (fdt@xilfpga) Description: MIPSfpga (xilfpga) Device Tree Created: Wed Aug 15 04:37:18 2018 Type: Flat Device Tree Compression: uncompressed Data Size: 2708 Bytes = 2.64 kB = 0.00 MB Architecture: MIPS Hash algo: sha1 Hash value: 509ce58e44c561d54539e64e9d4b47054e696fc6 Default Configuration: 'conf@default' Configuration 0 (conf@default) Description: Generic Linux kernel Kernel: kernel@0 Configuration 1 (conf@boston) Description: Boston Linux kernel Kernel: kernel@0 FDT: fdt@boston Configuration 2 (conf@ni169445) Description: NI 169445 Linux Kernel Kernel: kernel@0 FDT: fdt@ni169445 Configuration 3 (conf@xilfpga) Description: MIPSfpga Linux kernel Kernel: kernel@0 FDT: fdt@xilfpga Completed OK # rm -rf /kisskb/build/linus_mips-defconfig_mips # Build took: 0:01:46.045442

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