Yonghong Song 239946314e bpf: possibly avoid extra masking for narrower load in verifier ... Commit 31fd85816d ("bpf: permits narrower load from bpf program context fields") permits narrower load for certain ctx fields. The commit however will already generate a masking even if the prog-specific ctx conversion produces the result with narrower size. For example, for __sk_buff->protocol, the ctx conversion loads the data into register with 2-byte load. A narrower 2-byte load should not generate masking. For __sk_buff->vlan_present, the conversion function set the result as either 0 or 1, essentially a byte. The narrower 2-byte or 1-byte load should not generate masking. To avoid unnecessary masking, prog-specific *_is_valid_access now passes converted_op_size back to verifier, which indicates the valid data width after perceived future conversion. Based on this information, verifier is able to avoid unnecessary marking. Since we want more information back from prog-specific *_is_valid_access checking, all of them are packed into one data structure for more clarity. Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-06-23 14:04:11 -04:00
..
bpf	bpf: possibly avoid extra masking for narrower load in verifier	2017-06-23 14:04:11 -04:00
cgroup	cpuset: consider dying css as offline	2017-05-24 12:43:30 -04:00
configs	config: android-base: enable hardened usercopy and kernel ASLR	2017-02-27 18:43:46 -08:00
debug	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
events	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-06-15 11:59:32 -04:00
gcov	gcov: support GCC 7.1	2017-05-12 15:57:15 -07:00
irq	genirq: Release resources in __setup_irq() error path	2017-06-13 00:40:39 +02:00
livepatch	livepatch: Fix stacking of patches with respect to RCU	2017-06-20 10:42:19 +02:00
locking	futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock()	2017-05-22 21:57:18 +02:00
power	Merge branches 'intel_pstate' and 'pm-sleep'	2017-06-09 01:25:16 +02:00
printk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2017-06-08 10:50:04 -07:00
rcu	srcu: Allow use of Classic SRCU from both process and interrupt context	2017-06-08 08:25:19 -07:00
sched	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-06-18 18:45:17 +09:00
time	tick/broadcast: Make tick_broadcast_setup_oneshot() static	2017-06-12 18:56:01 +02:00
trace	bpf: possibly avoid extra masking for narrower load in verifier	2017-06-23 14:04:11 -04:00
.gitignore
acct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
async.c
audit.c	Merge branch 'stable-4.12' of git://git.infradead.org/users/pcmoore/audit	2017-05-03 09:21:59 -07:00
audit.h	audit: Use timespec64 to represent audit timestamps	2017-05-02 10:16:05 -04:00
audit_fsnotify.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
audit_tree.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
audit_watch.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
auditfilter.c	audit: kernel generated netlink traffic should have a portid of 0	2017-05-02 10:16:05 -04:00
auditsc.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
backtracetest.c
bounds.c
capability.c	capability: export has_capability	2017-01-12 07:01:56 -07:00
compat.c	time: Change k_clock nsleep() to use timespec64	2017-04-14 21:49:56 +02:00
configs.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
context_tracking.c
cpu.c	cpu/hotplug: Drop the device lock on error	2017-06-03 09:35:04 +02:00
cpu_pm.c
crash_core.c	ia64: reuse append_elf_note() and final_note() functions	2017-05-08 17:15:11 -07:00
crash_dump.c
cred.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>	2017-03-02 08:42:28 +01:00
delayacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
dma.c
elfcore.c
exec_domain.c
exit.c	userfaultfd: non-cooperative: rollback userfaultfd_exit	2017-03-09 17:01:09 -08:00
extable.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-02-22 10:15:09 -08:00
fork.c	Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-27 08:52:27 -07:00
freezer.c
futex.c	futex: Clarify mark_wake_futex memory barrier usage	2017-04-15 16:03:46 +02:00
futex_compat.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
groups.c	mm, vmalloc: use __GFP_HIGHMEM implicitly	2017-05-08 17:15:13 -07:00
hung_task.c	kernel/hung_task.c: defer showing held locks	2017-05-08 17:15:10 -07:00
irq_work.c
jump_label.c	This release has no new tracing features, just clean ups, minor fixes	2017-02-27 13:26:17 -08:00
kallsyms.c	bpf: make jited programs visible in traces	2017-02-17 13:40:05 -05:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: simplify interrupt check	2017-05-08 17:15:12 -07:00
kexec.c
kexec_core.c	ia64: reuse append_elf_note() and final_note() functions	2017-05-08 17:15:11 -07:00
kexec_file.c	kexec, x86/purgatory: Unbreak it and clean it up	2017-03-10 20:55:09 +01:00
kexec_internal.h	kexec, x86/purgatory: Unbreak it and clean it up	2017-03-10 20:55:09 +01:00
kmod.c	sched/headers, vfs/execve: Prepare to move the do_execve*() prototypes from <linux/sched.h> to <linux/binfmts.h>	2017-03-02 08:42:39 +01:00
kprobes.c	kprobes/x86: Fix to set RWX bits correctly before releasing trampoline	2017-05-26 22:37:00 -04:00
ksysfs.c	crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE	2017-05-08 17:15:11 -07:00
kthread.c	cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups	2017-03-17 10:18:47 -04:00
latencytop.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	2017-03-02 08:42:39 +01:00
Makefile	crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE	2017-05-08 17:15:11 -07:00
membarrier.c	Fix: Disable sys_membarrier when nohz_full is enabled	2017-01-23 11:32:16 -08:00
memremap.c	mm, zone_device: Replace {get, put}_zone_device_page() with a single reference to fix pmem crash	2017-05-01 09:15:53 +02:00
module-internal.h
module.c	kernel/module.c: use set_memory.h header	2017-05-08 17:15:14 -07:00
module_signing.c
notifier.c	kernel/notifier.c: simplify expression	2017-02-24 17:46:56 -08:00
nsproxy.c	perf: Add PERF_RECORD_NAMESPACES to include namespaces related info	2017-03-13 15:57:41 -03:00
padata.c	padata: get_next is never NULL	2017-04-21 20:30:46 +08:00
panic.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
params.c	boot/param: Move next_arg() function to lib/cmdline.c for later reuse	2017-04-18 10:37:13 +02:00
pid.c	pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()	2017-05-08 17:15:12 -07:00
pid_namespace.c	pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes	2017-05-13 17:26:01 -05:00
profile.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	2017-03-02 08:42:39 +01:00
ptrace.c	ptrace: Properly initialize ptracer_cred on fork	2017-05-23 07:40:44 -05:00
range.c
reboot.c
relay.c	Merge branch 'work.splice' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-05-02 11:38:06 -07:00
resource.c
seccomp.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
signal.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-10 10:30:46 -07:00
smp.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/idle.h>	2017-03-02 08:42:26 +01:00
smpboot.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	2017-03-02 08:42:35 +01:00
smpboot.h
softirq.c	sched/core: Remove 'task' parameter and rename tsk_restore_flags() to current_restore_flags()	2017-04-11 09:06:32 +02:00
stacktrace.c	stacktrace/x86: add function for detecting reliable stack traces	2017-03-08 09:18:02 +01:00
stop_machine.c	locking/core, stop_machine: Yield the CPU during stop machine()	2016-11-16 10:15:09 +01:00
sys.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2017-05-05 11:08:43 -07:00
sys_ni.c	move aio compat to fs/aio.c	2016-12-22 22:58:37 -05:00
sysctl.c	proc/sysctl: fix the int overflow for jiffies conversion	2017-05-08 17:15:10 -07:00
sysctl_binary.c	net: Remove NET_CORE_BUDGET_USECS from sysctl binary interface.	2017-04-21 15:59:52 -04:00
task_work.c
taskstats.c	taskstats: add e/u/stime for TGID command	2017-05-08 17:15:12 -07:00
test_kprobes.c
torture.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
tracepoint.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	2017-03-02 08:42:35 +01:00
tsacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
ucount.c	ucount: Remove the atomicity from ucount->count	2017-03-06 15:26:37 -06:00
uid16.c	sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>	2017-03-02 08:42:31 +01:00
up.c
user-return-notifier.c
user.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/user.h>	2017-03-02 08:42:29 +01:00
user_namespace.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
utsname.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
utsname_sysctl.c	sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>	2017-03-03 01:45:36 +01:00
watchdog.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
watchdog_hld.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
workqueue.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-01 19:12:53 -07:00
workqueue_internal.h