Alexei Starovoitov af86ca4e30 bpf: Prevent memory disambiguation attack ...

Detect code patterns where malicious 'speculative store bypass' can be used
and sanitize such patterns.

 39: (bf) r3 = r10
 40: (07) r3 += -216
 41: (79) r8 = *(u64 *)(r7 +0)   // slow read
 42: (7a) *(u64 *)(r10 -72) = 0  // verifier inserts this instruction
 43: (7b) *(u64 *)(r8 +0) = r3   // this store becomes slow due to r8
 44: (79) r1 = *(u64 *)(r6 +0)   // cpu speculatively executes this load
 45: (71) r2 = *(u8 *)(r1 +0)    // speculatively arbitrary 'load byte'
                                 // is now sanitized

Above code after x86 JIT becomes:
 e5: mov    %rbp,%rdx
 e8: add    $0xffffffffffffff28,%rdx
 ef: mov    0x0(%r13),%r14
 f3: movq   $0x0,-0x48(%rbp)
 fb: mov    %rdx,0x0(%r14)
 ff: mov    0x0(%rbx),%rdi
103: movzbq 0x0(%rdi),%rsi

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2018-05-19 20:44:24 +02:00

..

bpf

bpf: Prevent memory disambiguation attack

2018-05-19 20:44:24 +02:00

cgroup

Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2018-04-03 18:00:13 -07:00

configs

Merge tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2018-02-10 13:16:35 -08:00

debug

Merge tag 'for_linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb

2018-04-12 10:21:19 -07:00

events

perf: Remove superfluous allocation error check

2018-04-17 09:47:40 -03:00

gcov

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

irq

genirq/affinity: Spread irq vectors among present CPUs as far as possible

2018-04-06 12:19:51 +02:00

livepatch

livepatch: Allow to call a custom callback when freeing shadow variables

2018-04-17 13:42:48 +02:00

locking

locking/rwsem: Add DEBUG_RWSEMS to look for lock/unlock mismatches

2018-03-31 07:30:50 +02:00

power

PM / QoS: mark expected switch fall-throughs

2018-04-09 13:49:40 +02:00

printk

Merge tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2018-04-10 11:27:30 -07:00

rcu

Merge branches 'fixes.2018.02.23a', 'srcu.2018.02.20a' and 'torture.2018.02.20a' into HEAD

2018-02-23 15:15:41 -08:00

sched

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-04-15 12:43:30 -07:00

time

Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME

2018-04-26 14:53:32 +02:00

trace

Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-04-29 09:03:25 -07:00

.gitignore

…

acct.c

kernel/acct.c: fix the acct->needcheck check in check_free_space()

2018-01-04 16:45:09 -08:00

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-06 18:32:44 -08:00

audit_fsnotify.c

…

audit_tree.c

audit: track the owner of the command mutex ourselves

2018-02-23 11:22:22 -05:00

audit_watch.c

Merge tag 'audit-pr-20170816' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

2017-08-16 16:48:34 -07:00

audit.c

Merge tag 'audit-pr-20180403' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

2018-04-06 15:01:25 -07:00

audit.h

audit: track the owner of the command mutex ourselves

2018-02-23 11:22:22 -05:00

auditfilter.c

audit: deprecate the AUDIT_FILTER_ENTRY filter

2018-02-15 14:36:29 -05:00

auditsc.c

audit: bail before bug check if audit disabled

2018-02-15 14:40:25 -05:00

backtracetest.c

…

bounds.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

capability.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat.c

mm: add kernel_move_pages() helper, move compat syscall to mm/migrate.c

2018-04-02 20:15:32 +02:00

configs.c

…

context_tracking.c

…

cpu_pm.c

PM / CPU: replace raw_notifier with atomic_notifier

2017-07-31 13:09:49 +02:00

cpu.c

cpu/hotplug: Fix unused function warning

2018-03-15 20:34:40 +01:00

crash_core.c

kexec: export PG_swapbacked to VMCOREINFO

2018-04-13 17:10:27 -07:00

crash_dump.c

…

cred.c

…

delayacct.c

delayacct: Account blkio completion on the correct task

2018-01-16 03:29:36 +01:00

dma.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

elfcore.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

exec_domain.c

get rid of pointless includes of fs_struct.h

2018-02-22 14:28:50 -05:00

exit.c

kernel: use kernel_wait4() instead of sys_wait4()

2018-04-02 20:14:51 +02:00

extable.c

extable: Make init_kernel_text() global

2018-02-21 16:54:06 +01:00

fail_function.c

error-injection: Fix to prohibit jump optimization

2018-03-12 16:16:00 +01:00

fork.c

fork: unconditionally clear stack on fork

2018-04-20 17:18:35 -07:00

freezer.c

…

futex_compat.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

futex.c

pids: introduce find_get_task_by_vpid() helper

2018-02-06 18:32:46 -08:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2017-12-14 16:00:49 -08:00

hung_task.c

…

irq_work.c

irq/work: Improve the flag definitions

2018-01-08 19:43:15 +01:00

jump_label.c

jump_label: Disable jump labels in __exit code

2018-03-20 08:57:17 +01:00

kallsyms.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk

2018-02-01 13:36:15 -08:00

kcmp.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: detect double association with a single task

2018-02-06 18:32:46 -08:00

kexec_core.c

x86/mm, kexec: Allow kexec to be used with SME

2017-07-18 11:38:04 +02:00

kexec_file.c

kernel/kexec_file.c: allow archs to set purgatory load address

2018-04-13 17:10:28 -07:00

kexec_internal.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kexec.c

kexec: call do_kexec_load() in compat syscall directly

2018-04-02 20:15:01 +02:00

kmod.c

kmod: move #ifdef CONFIG_MODULES wrapper to Makefile

2017-09-08 18:26:51 -07:00

kprobes.c

kprobes: Fix random address output of blacklist file

2018-04-25 10:27:56 -04:00

ksysfs.c

kexec: move vmcoreinfo out of the kernel's .bss section

2017-07-12 16:25:59 -07:00

kthread.c

treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts

2017-11-21 16:35:54 -08:00

latencytop.c

…

Makefile

error-injection: Support fault injection framework

2018-01-12 17:33:38 -08:00

memremap.c

kernel/memremap: Remove stale devres_free() call

2018-03-06 10:58:54 -08:00

module_signing.c

…

module-internal.h

…

module.c

module: Fix display of wrong module .text address

2018-04-18 22:59:46 +02:00

notifier.c

…

nsproxy.c

…

padata.c

padata: add SPDX identifier

2018-01-05 18:43:00 +11:00

panic.c

taint: add taint for randstruct

2018-04-11 10:28:35 -07:00

params.c

kernel/params.c: downgrade warning for unsafe parameters

2018-04-11 10:28:37 -07:00

pid_namespace.c

Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2018-04-03 19:15:32 -07:00

pid.c

xarray: add the xa_lock to the radix_tree_root

2018-04-11 10:28:39 -07:00

profile.c

…

ptrace.c

pids: introduce find_get_task_by_vpid() helper

2018-02-06 18:32:46 -08:00

range.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

reboot.c

kernel/reboot.c: add devm_register_reboot_notifier()

2017-11-17 16:10:04 -08:00

relay.c

kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE

2018-02-21 15:35:43 -08:00

resource.c

resource: fix integer overflow at reallocation

2018-04-13 17:10:27 -07:00

seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-05 00:51:44 +02:00

signal.c

Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2018-04-07 11:11:41 -07:00

smp.c

smp/core: Use lockdep to assert IRQs are disabled/enabled

2017-11-08 11:13:50 +01:00

smpboot.c

watchdog/core, powerpc: Lock cpus across reconfiguration

2017-10-04 10:53:54 +02:00

smpboot.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

softirq.c

softirq: Consolidate common code in tasklet_[hi]_action()

2018-03-09 11:50:55 +01:00

stacktrace.c

…

stop_machine.c

…

sys_ni.c

syscalls/core: Prepare CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y for compat syscalls

2018-04-05 16:59:38 +02:00

sys.c

nospec: Allow getting/setting on non-current task

2018-05-03 13:55:51 +02:00

sysctl_binary.c

staging: irda: remove remaining remants of irda code removal

2018-04-16 11:26:49 +02:00

sysctl.c

kernel/sysctl.c: add kdoc comments to do_proc_do{u}intvec_minmax_conv_param

2018-04-11 10:28:38 -07:00

task_work.c

locking/barriers: Convert users of lockless_dereference() to READ_ONCE()

2017-12-17 13:57:15 +01:00

taskstats.c

pids: introduce find_get_task_by_vpid() helper

2018-02-06 18:32:46 -08:00

test_kprobes.c

kprobes: Disable the jprobes test code

2017-10-20 11:02:54 +02:00

torture.c

torture: Save a line in stutter_wait(): while -> for

2017-12-11 09:18:30 -08:00

tracepoint.c

tracepoint: Remove smp_read_barrier_depends() from comment

2017-12-04 10:52:56 -08:00

tsacct.c

…

ucount.c

headers: untangle kmemleak.h from mm.h

2018-04-05 21:36:27 -07:00

uid16.c

fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers

2018-04-02 20:15:59 +02:00

uid16.h

kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c

2018-04-02 20:15:30 +02:00

umh.c

kernel: use kernel_wait4() instead of sys_wait4()

2018-04-02 20:14:51 +02:00

up.c

smp: Avoid using two cache lines for struct call_single_data

2017-08-29 15:14:38 +02:00

user_namespace.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2017-11-16 12:20:15 -08:00

user-return-notifier.c

…

user.c

efivarfs: Limit the rate for non-root to read files

2018-02-22 10:21:02 -08:00

utsname_sysctl.c

…

utsname.c

uts: create "struct uts_namespace" from kmem_cache

2018-04-11 10:28:35 -07:00

watchdog_hld.c

Merge branch 'linus' into core/urgent, to pick up dependent commits

2017-11-04 08:53:04 +01:00

watchdog.c

Merge branch 'linus' into sched/core, to pick up fixes

2017-11-08 10:17:15 +01:00

workqueue_internal.h

Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2017-11-06 12:26:49 -08:00

workqueue.c

Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2018-04-03 18:00:13 -07:00