Jann Horn 122be5afdf 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>

2019-06-22 08:17:18 +02:00

..

bpf

bpf: convert htab map to hlist_nulls

2019-05-16 19:43:40 +02:00

configs

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debug

kdb: use memmove instead of overlapping memcpy

2018-12-08 13:05:05 +01:00

events

perf/core: Restore mmap record type correctly

2019-04-20 09:07:46 +02:00

gcov

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irq

genirq: Prevent use-after-free and work list corruption

2019-05-10 17:52:10 +02:00

livepatch

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locking

locking/rwsem: Prevent decrement of reader count before increment

2019-05-21 18:48:55 +02:00

power

x86/power: Fix 'nosmt' vs hibernation triple fault during resume

2019-06-11 12:22:48 +02:00

printk

printk: Fix panic caused by passing log_buf_len to command line

2018-11-13 11:17:01 -08:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:48:30 -07:00

sched

sched/core: Handle overflow in cpu_shares_write_u64

2019-05-31 06:48:22 -07:00

time

ntp: Allow TAI-UTC offset to be set to zero

2019-06-22 08:17:14 +02:00

trace

fs: prevent page refcount overflow in pipe_buf_get

2019-06-11 12:22:45 +02:00

.gitignore

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acct.c

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

2018-01-10 09:29:51 +01:00

async.c

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

2018-02-17 13:21:18 +01:00

audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit: fix use-after-free in audit_add_watch

2018-09-26 08:36:37 +02:00

audit.c

audit: return on memory error to avoid null pointer dereference

2018-05-30 07:50:49 +02:00

audit.h

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auditfilter.c

audit: fix a memory leak bug

2019-05-31 06:48:20 -07:00

auditsc.c

audit: allow not equal op for audit by executable

2018-08-03 07:55:25 +02:00

backtracetest.c

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bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:16:57 -08:00

capability.c

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cgroup_freezer.c

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cgroup_pids.c

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cgroup.c

cgroup: Fix deadlock in cpu hotplug path

2018-10-13 09:18:56 +02:00

compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

x86/power: Fix 'nosmt' vs hibernation triple fault during resume

2019-06-11 12:22:48 +02:00

cpuset.c

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crash_dump.c

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cred.c

ptrace: restore smp_rmb() in __ptrace_may_access()

2019-06-22 08:17:18 +02:00

delayacct.c

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dma.c

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elfcore.c

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exec_domain.c

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exit.c

kernel/exit.c: release ptraced tasks before zap_pid_ns_processes

2019-02-06 17:33:29 +01:00

extable.c

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fork.c

fork: record start_time late

2019-01-13 10:03:51 +01:00

freezer.c

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futex_compat.c

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futex.c

futex: Ensure that futex address is aligned in handle_futex_death()

2019-03-27 14:13:03 +09:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:07:52 +02:00

irq_work.c

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jump_label.c

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kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:55:12 +02:00

kexec_core.c

objtool, x86: Add several functions and files to the objtool whitelist

2018-06-05 10:28:57 +02:00

kexec_file.c

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kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobes: Fix error check when reusing optimized probes

2019-04-27 09:34:45 +02:00

ksysfs.c

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kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:55:12 +02:00

latencytop.c

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Makefile

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membarrier.c

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memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:03:51 +01:00

module_signing.c

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module-internal.h

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module.c

module: exclude SHN_UNDEF symbols from kallsyms api

2018-10-03 17:01:48 -07:00

notifier.c

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nsproxy.c

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padata.c

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panic.c

panic: avoid deadlocks in re-entrant console drivers

2018-12-29 13:40:16 +01:00

params.c

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pid_namespace.c

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pid.c

pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

2018-04-13 19:47:53 +02:00

profile.c

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ptrace.c

ptrace: restore smp_rmb() in __ptrace_may_access()

2019-06-22 08:17:18 +02:00

range.c

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reboot.c

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relay.c

kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE

2018-05-30 07:50:29 +02:00

resource.c

resource: fix integer overflow at reallocation

2018-04-24 09:34:09 +02:00

seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 16:58:02 +02:00

signal.c

kernel/signal.c: trace_signal_deliver when signal_group_exit

2019-06-11 12:22:43 +02:00

smp.c

cpu/hotplug: Fix SMT supported evaluation

2018-08-15 18:14:53 +02:00

smpboot.c

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smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:14:42 +02:00

stacktrace.c

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stop_machine.c

stop_machine: Use raw spinlocks

2018-08-03 07:55:24 +02:00

sys_ni.c

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sys.c

kernel/sys.c: prctl: fix false positive in validate_prctl_map()

2019-06-22 08:17:13 +02:00

sysctl_binary.c

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sysctl.c

sysctl: return -EINVAL if val violates minmax

2019-06-22 08:17:11 +02:00

task_work.c

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taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:50:20 +02:00

tsacct.c

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ucount.c

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uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

up.c

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user_namespace.c

userns: move user access out of the mutex

2018-09-09 20:01:24 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

utsname.c

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watchdog_hld.c

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watchdog.c

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workqueue_internal.h

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workqueue.c

workqueue: use put_device() instead of kfree()

2018-05-30 07:50:36 +02:00