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android_kernel_samsung_msm8976/kernel
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David Herrmann 10f3a4935d shm: add memfd_create() syscall 
memfd_create() is similar to mmap(MAP_ANON), but returns a file-descriptor
that you can pass to mmap().  It can support sealing and avoids any
connection to user-visible mount-points.  Thus, it's not subject to quotas
on mounted file-systems, but can be used like malloc()'ed memory, but with
a file-descriptor to it.

memfd_create() returns the raw shmem file, so calls like ftruncate() can
be used to modify the underlying inode.  Also calls like fstat() will
return proper information and mark the file as regular file.  If you want
sealing, you can specify MFD_ALLOW_SEALING.  Otherwise, sealing is not
supported (like on all other regular files).

Compared to O_TMPFILE, it does not require a tmpfs mount-point and is not
subject to a filesystem size limit.  It is still properly accounted to
memcg limits, though, and to the same overcommit or no-overcommit
accounting as all user memory.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Ryan Lortie <desrt@desrt.ca>
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Angelo G. Del Regno <kholk11@gmail.com>
 		2020-10-08 05:52:36 -07:00
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cpu sched/idle: Add missing checks to the exit condition of cpu_idle_poll() 2019-07-27 21:50:45 +02:00
debug mm: per-thread vma caching 2019-07-27 22:08:06 +02:00
events perf/core: Fix impossible ring-buffer sizes warning 2019-07-27 22:10:22 +02:00
gcov
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irq This is the 3.10.99 stable release 2017-04-18 17:17:46 +02:00
locking locking/lockdep: Use for_each_process_thread() for debug_show_all_locks() 2019-07-27 22:09:22 +02:00
power workqueues: Introduce new flag WQ_POWER_EFFICIENT for power oriented workqueues 2019-07-27 22:11:01 +02:00
rcu rcu: Do RCU GP kthread self-wakeup from softirq and interrupt 2019-07-27 22:11:18 +02:00
sched sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target 2019-07-27 22:11:08 +02:00
time tick: broadcast-hrtimer: Fix a race in bc_set_next 2019-12-21 20:02:36 +01:00
trace trace: Fix preempt_enable_no_resched() abuse 2019-07-27 22:10:40 +02:00
.gitignore
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Kconfig.freezer
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Kconfig.hz
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Kconfig.locks Import latest Samsung release 2017-04-18 03:43:52 +02:00
Kconfig.preempt
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Makefile UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
acct.c
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async.c kernel/async.c: revert "async: simplify lowest_in_progress()" 2019-07-27 21:49:48 +02:00
audit.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
audit.h Import latest Samsung release 2017-04-18 03:43:52 +02:00
audit_tree.c
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audit_watch.c audit: fix use-after-free in audit_add_watch 2019-07-27 21:51:40 +02:00
auditfilter.c
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auditsc.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
backtracetest.c
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bounds.c
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capability.c
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cgroup.c cgroup: prefer %pK to %p 2016-12-06 09:24:09 -08:00
cgroup_freezer.c
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compat.c
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configs.c
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context_tracking.c
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cpu.c cpu: send KOBJ_ONLINE event when enabling cpus 2017-07-24 01:09:04 -07:00
cpu_pm.c
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cpuset.c sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs 2019-07-27 22:08:19 +02:00
crash_dump.c
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cred.c
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delayacct.c
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dma.c
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elfcore.c
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exec_domain.c ANDROID: exec_domains: Disable request_module() call for personalities 2016-05-18 14:34:40 +05:30
exit.c wait/ptrace: assume __WALL if the child is traced 2019-07-27 22:09:56 +02:00
extable.c kernel/extable.c: mark core_kernel_text notrace 2019-07-27 21:44:25 +02:00
fork.c fork: Allow CLONE_PARENT after setns(CLONE_NEWPID) 2019-07-27 22:10:35 +02:00
freezer.c freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes 2019-07-27 22:09:18 +02:00
futex.c futex: Ensure that futex address is aligned in handle_futex_death() 2019-07-27 22:08:53 +02:00
futex_compat.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
groups.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
hrtimer.c hrtimer: Store cpu-number in struct hrtimer_cpu_base 2019-12-21 20:01:04 +01:00
hung_task.c kernel/hung_task.c: change hung_task.c to use for_each_process_thread() 2019-07-27 22:09:21 +02:00
irq_work.c irq_work: Remove BUG_ON in irq_work_run() 2016-01-07 00:42:12 -08:00
itimer.c
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jump_label.c
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kallsyms.c kernel: use macros from compiler.h instead of __attribute__((...)) 2019-07-27 22:10:27 +02:00
kcmp.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
kexec.c kernel: use macros from compiler.h instead of __attribute__((...)) 2019-07-27 22:10:27 +02:00
kmod.c
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kprobes.c
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ksysfs.c kernel: use macros from compiler.h instead of __attribute__((...)) 2019-07-27 22:10:27 +02:00
kthread.c kthread: Fix the race condition when kthread is parked 2015-06-04 17:43:41 -07:00
latencytop.c
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modsign_pubkey.c
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module-internal.h UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
module.c param: hand arguments after -- straight to init 2019-07-27 22:10:44 +02:00
module_signing.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
notifier.c
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nsproxy.c Rename nsproxy.pid_ns to nsproxy.pid_ns_for_children 2019-07-27 22:10:33 +02:00
padata.c padata: avoid race in reordering 2019-07-27 21:44:05 +02:00
panic.c printk: do cond_resched() between lines while outputting to consoles 2019-07-27 21:41:46 +02:00
params.c param: hand arguments after -- straight to init 2019-07-27 22:10:44 +02:00
pid.c kernel/fork.c:copy_process(): don't add the uninitialized child to thread/task/pid lists 2019-07-27 22:10:32 +02:00
pid_namespace.c Rename nsproxy.pid_ns to nsproxy.pid_ns_for_children 2019-07-27 22:10:33 +02:00
posix-cpu-timers.c posix-timers: Sanitize overrun handling 2019-07-27 21:53:21 +02:00
posix-timers.c posix-timers: Sanitize overrun handling 2019-07-27 21:53:21 +02:00
printk.c printk: use rcuidle console tracepoint 2019-07-27 21:44:09 +02:00
profile.c
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ptrace.c signal/ptrace: Don't leak unitialized kernel memory with PTRACE_PEEK_SIGINFO 2019-07-27 22:11:17 +02:00
range.c
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relay.c treewide: Fix typo in Documentation/DocBook 2019-07-27 22:10:20 +02:00
res_counter.c
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resource.c /proc/iomem: only expose physical resource addresses to privileged users 2019-07-27 22:05:58 +02:00
seccomp.c UPSTREAM: seccomp: always propagate NO_NEW_PRIVS on tsync 2019-07-27 21:51:01 +02:00
signal.c kernel: use macros from compiler.h instead of __attribute__((...)) 2019-07-27 22:10:27 +02:00
smp.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
smpboot.c smpboot: use kmemleak_not_leak for smpboot_thread_data 2015-05-11 17:07:29 +05:30
smpboot.h
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softirq.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
stacktrace.c
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stop_machine.c
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sys.c exit.c: unexport __set_special_pids() 2019-07-27 22:09:28 +02:00
sys_ni.c shm: add memfd_create() syscall 2020-10-08 05:52:36 -07:00
sysctl.c kernel/sysctl.c: add missing range check in do_proc_dointvec_minmax_conv 2019-07-27 22:11:27 +02:00
sysctl_binary.c
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system_certificates.S UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
system_keyring.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
task_work.c
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taskstats.c
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test_kprobes.c
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time.c time: Make sure jiffies_to_msecs() preserves non-zero time periods 2019-07-27 21:52:48 +02:00
timeconst.bc
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timer.c timers: Use proper base migration in add_timer_on() 2019-07-27 21:42:23 +02:00
tracepoint.c tracing: syscall_regfunc() should not skip kernel threads 2019-07-27 22:09:17 +02:00
tsacct.c
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uid16.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
up.c
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user-return-notifier.c
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user.c
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user_namespace.c userns: move user access out of the mutex 2019-07-27 21:51:26 +02:00
utsname.c
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utsname_sysctl.c
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watchdog.c
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workqueue.c workqueue: Add system wide power_efficient workqueues 2019-07-27 22:11:01 +02:00
workqueue_internal.h
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