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android_kernel_motorola_sm6375/kernel
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Filename Latest commit message Latest commit date
Andrey Ignatov 088ec26d9c bpf: Reject indirect var_off stack access in unpriv mode 
Proper support of indirect stack access with variable offset in
unprivileged mode (!root) requires corresponding support in Spectre
masking for stack ALU in retrieve_ptr_limit().

There are no use-case for variable offset in unprivileged mode though so
make verifier reject such accesses for simplicity.

Pointer arithmetics is one (and only?) way to cause variable offset and
it's already rejected in unpriv mode so that verifier won't even get to
helper function whose argument contains variable offset, e.g.:

  0: (7a) *(u64 *)(r10 -16) = 0
  1: (7a) *(u64 *)(r10 -8) = 0
  2: (61) r2 = *(u32 *)(r1 +0)
  3: (57) r2 &= 4
  4: (17) r2 -= 16
  5: (0f) r2 += r10
  variable stack access var_off=(0xfffffffffffffff0; 0x4) off=-16 size=1R2
  stack pointer arithmetic goes out of range, prohibited for !root

Still it looks like a good idea to reject variable offset indirect stack
access for unprivileged mode in check_stack_boundary() explicitly.

Fixes: 2011fccfb6 ("bpf: Support variable offset stack access from helpers")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-04-05 16:50:07 +02:00
..
bpf bpf: Reject indirect var_off stack access in unpriv mode 2019-04-05 16:50:07 +02:00
cgroup Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
configs
debug kdb: use bool for binary state indicators 2018-12-30 08:31:52 +00:00
dma memblock: drop memblock_alloc_*_nopanic() variants 2019-03-12 10:04:02 -07:00
events perf/core improvements and fixes: 2019-03-22 22:50:41 +01:00
gcov kernel/gcov/gcc_3_4.c: use struct_size() in kzalloc() 2019-03-07 18:32:02 -08:00
irq genirq: Mark expected switch case fall-through 2019-03-23 12:32:01 +01:00
livepatch Merge branch 'for-5.1/atomic-replace' into for-linus 2019-03-05 15:56:59 +01:00
locking locking/lockdep: Only call init_rcu_head() after RCU has been initialized 2019-03-09 14:15:51 +01:00
power treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
printk fbdev changes for v5.1: 2019-03-15 14:22:59 -07:00
rcu Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-06 07:59:36 -08:00
sched Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-24 11:42:10 -07:00
time time/jiffies: Make refined_jiffies static 2019-03-22 13:38:26 +01:00
trace ftrace: Fix warning using plain integer as NULL & spelling corrections 2019-03-26 08:35:36 -04:00
.gitignore kernel/configs: use .incbin directive to embed config_data.gz 2019-03-07 18:32:02 -08:00
acct.c
async.c async: Add support for queueing on specific NUMA node 2019-01-31 14:20:54 +01:00
audit.c audit: remove audit_context when CONFIG_ AUDIT and not AUDITSYSCALL 2019-02-03 17:49:35 -05:00
audit.h audit: hide auditsc_get_stamp and audit_serial prototypes 2019-02-07 21:44:27 -05:00
audit_fsnotify.c audit: add syscall information to CONFIG_CHANGE records 2019-01-18 17:53:29 -05:00
audit_tree.c audit: hand taken context to audit_kill_trees for syscall logging 2019-01-14 18:01:05 -05:00
audit_watch.c audit: add syscall information to CONFIG_CHANGE records 2019-01-18 17:53:29 -05:00
auditfilter.c audit: mark expected switch fall-through 2019-02-12 20:17:13 -05:00
auditsc.c audit: remove audit_context when CONFIG_ AUDIT and not AUDITSYSCALL 2019-02-03 17:49:35 -05:00
backtracetest.c
bounds.c kbuild: fix kernel/bounds.c 'W=1' warning 2018-10-31 08:54:14 -07:00
capability.c LSM: add SafeSetID module that gates setid calls 2019-01-25 11:22:43 -08:00
compat.c time: make adjtime compat handling available for 32 bit 2019-02-07 00:13:27 +01:00
configs.c kernel/configs: use .incbin directive to embed config_data.gz 2019-03-07 18:32:02 -08:00
context_tracking.c
cpu.c Linux 5.0-rc5 2019-02-04 08:57:24 +01:00
cpu_pm.c
crash_core.c kexec: export PG_offline to VMCOREINFO 2019-03-05 21:07:14 -08:00
crash_dump.c
cred.c SELinux: Remove cred security blob poisoning 2019-01-08 13:18:44 -08:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c Merge branch 'for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2019-03-07 10:11:41 -08:00
extable.c
fail_function.c kernel/fail_function.c: remove meaningless null pointer check before debugfs_remove_recursive 2018-10-31 08:54:12 -07:00
fork.c 5.1 Merge Window Pull Request 2019-03-09 15:53:03 -08:00
freezer.c
futex.c futex: Ensure that futex address is aligned in handle_futex_death() 2019-03-22 13:05:26 +01:00
groups.c
hung_task.c kernel/hung_task.c: Use continuously blocked time when reporting. 2019-03-07 18:31:59 -08:00
iomem.c
irq_work.c
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
kallsyms.c bpf: Add module name [bpf] to ksymbols for bpf programs 2019-01-21 17:38:56 -03:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks bpf: introduce bpf_spin_lock 2019-02-01 20:55:38 +01:00
Kconfig.preempt kconfig: warn no new line at end of file 2018-12-15 17:44:35 +09:00
kcov.c kcov: convert kcov.refcount to refcount_t 2019-03-07 18:32:02 -08:00
kexec.c
kexec_core.c mm: convert totalram_pages and totalhigh_pages variables to atomic 2018-12-28 12:11:47 -08:00
kexec_file.c kexec_file: kexec_walk_memblock() only walks a dedicated region at kdump 2018-12-06 14:38:50 +00:00
kexec_internal.h
kmod.c
kprobes.c kprobes: Search non-suffixed symbol in blacklist 2019-02-13 08:16:40 +01:00
ksysfs.c
kthread.c Merge branch 'akpm' (patches from Andrew) 2019-03-06 10:31:36 -08:00
latencytop.c
Makefile kernel/configs: use .incbin directive to embed config_data.gz 2019-03-07 18:32:02 -08:00
memremap.c mm/hmm: fix memremap.h, move dev_page_fault_t callback to hmm 2018-12-28 12:11:52 -08:00
module-internal.h
module.c dynamic_debug: add static inline stub for ddebug_add_module 2019-03-07 18:32:00 -08:00
module_signing.c modsign: use all trusted keys to verify module signature 2018-11-07 14:41:41 +01:00
notifier.c
nsproxy.c
padata.c padata: clean an indentation issue, remove extraneous space 2018-11-16 14:11:04 +08:00
panic.c kernel/panic.c: taint: fix debugfs_simple_attr.cocci warnings 2019-03-07 18:31:59 -08:00
params.c
pid.c Fix failure path in alloc_pid() 2018-12-28 12:42:30 -08:00
pid_namespace.c
profile.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ptrace.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
range.c
reboot.c
relay.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:27:20 -07:00
resource.c device-dax for 5.1 2019-03-16 13:05:32 -07:00
rseq.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
seccomp.c Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-03-07 11:44:01 -08:00
signal.c pidfd patches for v5.1-rc1 2019-03-16 13:47:14 -07:00
smp.c cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM 2019-01-30 19:27:00 +01:00
smpboot.c
smpboot.h
softirq.c softirq: Don't skip softirq execution when softirq thread is parking 2019-02-10 21:51:39 +01:00
stackleak.c stackleak: Mark stackleak_track_stack() as notrace 2018-12-05 19:31:44 -08:00
stacktrace.c
stop_machine.c
sys.c Merge branch 'akpm' (patches from Andrew) 2019-03-07 19:25:37 -08:00
sys_ni.c pidfd patches for v5.1-rc1 2019-03-16 13:47:14 -07:00
sysctl.c kernel/sysctl.c: define minmax conv functions in terms of non-minmax versions 2019-03-12 10:04:00 -07:00
sysctl_binary.c kernel/sysctl: add panic_print into sysctl 2019-01-04 13:13:47 -08:00
task_work.c
taskstats.c genetlink: make policy common to family 2019-03-22 10:38:23 -04:00
test_kprobes.c
torture.c Merge branches 'doc.2019.01.26a', 'fixes.2019.01.26a', 'sil.2019.01.26a', 'spdx.2019.02.09a', 'srcu.2019.01.26a' and 'torture.2019.01.26a' into HEAD 2019-02-09 08:47:52 -08:00
tracepoint.c tracing: Replace synchronize_sched() and call_rcu_sched() 2018-11-27 09:21:41 -08:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c umh: add exit routine for UMH process 2019-01-11 18:05:40 -08:00
up.c
user-return-notifier.c
user.c
user_namespace.c userns: also map extents in the reverse map to kernel IDs 2018-11-07 23:51:16 -06:00
utsname.c
utsname_sysctl.c
watchdog.c watchdog/core: Make variables static 2019-03-22 13:40:17 +01:00
watchdog_hld.c
workqueue.c workqueue: Only unregister a registered lockdep key 2019-03-21 12:00:18 +01:00
workqueue_internal.h psi: fix aggregation idle shut-off 2019-02-01 15:46:23 -08:00