Martin KaFai Lau f3dda7a679 bpf: net: Avoid copying sk_user_data of reuseport_array during sk_clone ... It makes little sense for copying sk_user_data of reuseport_array during sk_clone_lock(). This patch reuses the SK_USER_DATA_NOCOPY bit introduced in commit f1ff5ce2cd ("net, sk_msg: Clear sk_user_data pointer on clone if tagged"). It is used to mark the sk_user_data is not supposed to be copied to its clone. Although the cloned sk's sk_user_data will not be used/freed in bpf_sk_reuseport_detach(), this change can still allow the cloned sk's sk_user_data to be used by some other means. Freeing the reuseport_array's sk_user_data does not require a rcu grace period. Thus, the existing rcu_assign_sk_user_data_nocopy() is not used. Fixes: 5dc4c4b7d4 ("bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY") Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20200709061104.4018798-1-kafai@fb.com		2020-07-09 22:03:31 +02:00
..
bpf	bpf: net: Avoid copying sk_user_data of reuseport_array during sk_clone	2020-07-09 22:03:31 +02:00
cgroup	cgroup: fix cgroup_sk_alloc() for sk_clone_lock()	2020-07-07 13:34:11 -07:00
configs
debug	maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault	2020-06-17 10:57:41 -07:00
dma	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2020-06-30 14:20:45 -07:00
events
gcov	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
irq	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
kcsan
livepatch
locking	The X86 entry, exception and interrupt code rework	2020-06-13 10:05:47 -07:00
power	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
printk	Revert "kernel/printk: add kmsg SEEK_CUR handling"	2020-06-21 20:47:20 -07:00
rcu
sched
time	The X86 entry, exception and interrupt code rework	2020-06-13 10:05:47 -07:00
trace	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-25 18:27:40 -07:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
cpu.c
cpu_pm.c
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c
extable.c
fail_function.c
fork.c
freezer.c
futex.c
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kcmp.c
Kconfig.freezer
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kcov.c
kexec.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	kretprobe: Prevent triggering kretprobe from within kprobe_flush_task	2020-06-16 21:21:01 -04:00
ksysfs.c
kthread.c	maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault	2020-06-17 10:57:41 -07:00
latencytop.c
Makefile	Notifications over pipes + Keyring notifications	2020-06-13 09:56:21 -07:00
module-internal.h
module.c
module_signature.c
module_signing.c
notifier.c
nsproxy.c	nsproxy: restore EINVAL for non-namespace file descriptor	2020-06-17 00:33:12 +02:00
padata.c
panic.c
params.c
pid.c
pid_namespace.c
profile.c
ptrace.c
range.c
reboot.c
relay.c
resource.c
rseq.c
scs.c
seccomp.c
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys.c	Add additional LSM hooks for SafeSetID	2020-06-14 11:39:31 -07:00
sys_ni.c
sysctl-test.c
sysctl.c
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watch_queue.c	Notifications over pipes + Keyring notifications	2020-06-13 09:56:21 -07:00
watchdog.c
watchdog_hld.c
workqueue.c	maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault	2020-06-17 10:57:41 -07:00
workqueue_internal.h