Alexei Starovoitov abf2e7d6e2 bpf: add missing rcu protection when releasing programs from prog_array ... Normally the program attachment place (like sockets, qdiscs) takes care of rcu protection and calls bpf_prog_put() after a grace period. The programs stored inside prog_array may not be attached anywhere, so prog_array needs to take care of preserving rcu protection. Otherwise bpf_tail_call() will race with bpf_prog_put(). To solve that introduce bpf_prog_put_rcu() helper function and use it in 3 places where unattached program can decrement refcnt: closing program fd, deleting/replacing program in prog_array. Fixes: 04fd61ab36 ("bpf: allow bpf programs to tail-call other bpf programs") Reported-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-05-31 00:27:51 -07:00
..
bpf	bpf: add missing rcu protection when releasing programs from prog_array	2015-05-31 00:27:51 -07:00
configs	…
debug	…
events	perf: Annotate inherited event ctx->mutex recursion	2015-05-08 11:59:40 +02:00
gcov	gcov: fix softlockups	2015-04-17 09:04:08 -04:00
irq	genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip	2015-04-24 20:57:06 +02:00
livepatch	…
locking	sched: Handle priority boosted tasks proper in setscheduler()	2015-05-08 11:53:55 +02:00
power	…
printk	TTY/Serial patches for 4.1-rc1	2015-04-21 09:33:10 -07:00
rcu	…
sched	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2015-05-22 15:15:30 -07:00
time	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-05-09 14:57:49 -07:00
trace	bpf: allow bpf programs to tail-call other bpf programs	2015-05-21 17:07:59 -04:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	…
Kconfig.preempt	…
Makefile	modsign: change default key details	2015-04-30 09:35:41 -07:00
acct.c	…
async.c	…
audit.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
audit.h	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	2015-04-22 14:49:23 -07:00
audit_tree.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
audit_watch.c	…
auditfilter.c	…
auditsc.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
backtracetest.c	…
bounds.c	…
capability.c	…
cgroup.c	…
cgroup_freezer.c	…
compat.c	…
configs.c	…
context_tracking.c	…
cpu.c	…
cpu_pm.c	…
cpuset.c	…
crash_dump.c	…
cred.c	…
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	…
extable.c	…
fork.c	oprofile: reduce mmap_sem hold for mm->exe_file	2015-04-17 09:04:11 -04:00
freezer.c	…
futex.c	…
futex_compat.c	…
groups.c	…
hung_task.c	…
irq_work.c	…
jump_label.c	…
kallsyms.c	…
kcmp.c	…
kexec.c	kexec: allocate the kexec control page with KEXEC_CONTROL_MEMORY_GFP	2015-04-23 16:52:01 +02:00
kmod.c	…
kprobes.c	…
ksysfs.c	…
kthread.c	…
latencytop.c	…
module-internal.h	…
module.c	Quentin opened a can of worms by adding extable entry checking to modpost,	2015-04-22 09:49:24 -07:00
module_signing.c	…
notifier.c	…
nsproxy.c	…
padata.c	…
panic.c	…
params.c	…
pid.c	fork: report pid reservation failure properly	2015-04-17 09:04:06 -04:00
pid_namespace.c	…
profile.c	…
ptrace.c	ptrace: ptrace_detach() can no longer race with SIGKILL	2015-04-17 09:04:06 -04:00
range.c	…
reboot.c	…
relay.c	…
resource.c	…
seccomp.c	seccomp, filter: add and use bpf_prog_create_from_user from seccomp	2015-05-09 17:35:05 -04:00
signal.c	signal: remove warning about using SI_TKILL in rt_[tg]sigqueueinfo	2015-04-17 09:04:06 -04:00
smp.c	smp: Fix error case handling in smp_call_function_*()	2015-04-19 13:19:23 -07:00
smpboot.c	…
smpboot.h	…
softirq.c	…
stacktrace.c	…
stop_machine.c	…
sys.c	prctl: avoid using mmap_sem for exe_file serialization	2015-04-17 09:04:07 -04:00
sys_ni.c	…
sysctl.c	kernel/sysctl.c: detect overflows when converting to int	2015-04-17 09:04:08 -04:00
sysctl_binary.c	…
system_certificates.S	…
system_keyring.c	…
task_work.c	…
taskstats.c	…
test_kprobes.c	…
torture.c	…
tracepoint.c	…
tsacct.c	…
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	…
watchdog.c	watchdog: fix double lock in watchdog_nmi_enable_all	2015-05-19 10:57:03 -07:00
workqueue.c	…
workqueue_internal.h	…