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linux/kernel
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Jann Horn 58fd0749b4 ptrace: restore smp_rmb() in __ptrace_may_access() 
commit f6581f5b55 upstream.

Restore the read memory barrier in __ptrace_may_access() that was deleted
a couple years ago. Also add comments on this barrier and the one it pairs
with to explain why they're there (as far as I understand).

Fixes: bfedb58925 ("mm: Add a user_ns owner to mm_struct and fix ptrace permission checks")
Cc: stable@vger.kernel.org
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 08:00:03 +02:00
..
bpf
bpf: fix undefined behavior in narrow load handling
2019-06-15 11:52:54 +02:00
cgroup
mm, memcg: consider subtrees in memory.events
2019-06-09 09:16:13 +02:00
configs
kvm_config: add CONFIG_VIRTIO_MENU
2018-10-24 20:55:56 -04:00
debug
kdb: use bool for binary state indicators
2018-12-30 08:31:52 +00:00
dma
dma-debug: only skip one stackframe entry
2019-04-11 19:29:50 +02:00
events
perf/ring_buffer: Fix AUX software double buffering
2019-05-03 12:46:10 +02:00
gcov
kernel/gcov/gcc_3_4.c: use struct_size() in kzalloc()
2019-03-07 18:32:02 -08:00
irq
genirq: Prevent use-after-free and work list corruption
2019-05-11 07:49:54 +02:00
livepatch
Merge branch 'for-5.1/atomic-replace' into for-linus
2019-03-05 15:56:59 +01:00
locking
locking/rwsem: Prevent decrement of reader count before increment
2019-05-22 07:39:38 +02:00
power
x86/power: Fix 'nosmt' vs hibernation triple fault during resume
2019-06-11 12:19:17 +02:00
printk
Merge tag 'fbdev-v5.1' of git://github.com/bzolnier/linux
2019-03-15 14:22:59 -07:00
rcu
rcuperf: Fix cleanup path for invalid perf_type strings
2019-05-31 06:43:47 -07:00
sched
sched/core: Handle overflow in cpu_shares_write_u64
2019-05-31 06:43:29 -07:00
time
ntp: Allow TAI-UTC offset to be set to zero
2019-06-15 11:52:55 +02:00
trace
tracing: Avoid memory leak in predicate_parse()
2019-06-09 09:16:09 +02:00
.gitignore
kernel/configs: use .incbin directive to embed config_data.gz
2019-03-07 18:32:02 -08:00
acct.c
acct_on(): don't mess with freeze protection
2019-05-31 06:43:13 -07:00
async.c
async: Add support for queueing on specific NUMA node
2019-01-31 14:20:54 +01:00
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
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
auditfilter.c
audit: fix a memory leak bug
2019-05-31 06:43:28 -07:00
auditsc.c
audit: fix a memleak caused by auditing load module
2019-05-31 06:43:55 -07:00
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_pm.c
…
cpu.c
x86/power: Fix 'nosmt' vs hibernation triple fault during resume
2019-06-11 12:19:17 +02:00
crash_core.c
kexec: export PG_offline to VMCOREINFO
2019-03-05 21:07:14 -08:00
crash_dump.c
…
cred.c
ptrace: restore smp_rmb() in __ptrace_may_access()
2019-06-19 08:00:03 +02:00
delayacct.c
delayacct: track delays from thrashing cache pages
2018-10-26 16:26:32 -07:00
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
userfaultfd: use RCU to free the task struct when fork fails
2019-05-22 07:39:51 +02:00
freezer.c
…
futex.c
locking/futex: Allow low-level atomic operations to return -EAGAIN
2019-05-11 07:49:56 +02:00
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
irq_work: Do not raise an IPI when queueing work on the local CPU
2019-05-31 06:43:30 -07:00
jump_label.c
locking/static_key: Fix false positive warnings on concurrent dec/inc
2019-05-31 06:43:41 -07:00
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_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
…
kexec.c
…
kmod.c
…
kprobes.c
kprobes: Fix error check when reusing optimized probes
2019-04-16 09:38:16 +02:00
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_signing.c
modsign: use all trusted keys to verify module signature
2018-11-07 14:41:41 +01:00
module-internal.h
…
module.c
x86/modules: Avoid breaking W^X while loading modules
2019-05-31 06:43:19 -07:00
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_namespace.c
signal: Use group_send_sig_info to kill all processes in a pid namespace
2018-09-16 16:08:25 +02:00
pid.c
Fix failure path in alloc_pid()
2018-12-28 12:42:30 -08:00
profile.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
ptrace.c
ptrace: restore smp_rmb() in __ptrace_may_access()
2019-06-19 08:00:03 +02:00
range.c
…
reboot.c
kernel/reboot.c: export pm_power_off_prepare
2018-09-11 16:13:24 +01:00
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
Merge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
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 tag 'seccomp-v5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2019-04-29 13:24:34 -07:00
signal.c
kernel/signal.c: trace_signal_deliver when signal_group_exit
2019-06-09 09:16:13 +02:00
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_ni.c
Merge tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
2019-03-16 13:47:14 -07:00
sys.c
kernel/sys.c: prctl: fix false positive in validate_prctl_map()
2019-06-15 11:52:52 +02:00
sysctl_binary.c
kernel/sysctl: add panic_print into sysctl
2019-01-04 13:13:47 -08:00
sysctl.c
sysctl: return -EINVAL if val violates minmax
2019-06-15 11:52:50 +02:00
task_work.c
…
taskstats.c
…
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
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
user_namespace.c
userns: also map extents in the reverse map to kernel IDs
2018-11-07 23:51:16 -06:00
user-return-notifier.c
…
user.c
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
utsname_sysctl.c
…
utsname.c
…
watchdog_hld.c
kernel/watchdog_hld.c: hard lockup message should end with a newline
2019-04-19 09:46:05 -07:00
watchdog.c
watchdog: Respect watchdog cpumask on CPU hotplug
2019-03-28 13:32:01 +01:00
workqueue_internal.h
psi: fix aggregation idle shut-off
2019-02-01 15:46:23 -08:00
workqueue.c
workqueue: Only unregister a registered lockdep key
2019-03-21 12:00:18 +01:00