John Fastabend 3d9e952697 bpf: sockmap, fix leaking maps with attached but not detached progs ... When a program is attached to a map we increment the program refcnt to ensure that the program is not removed while it is potentially being referenced from sockmap side. However, if this same program also references the map (this is a reasonably common pattern in my programs) then the verifier will also increment the maps refcnt from the verifier. This is to ensure the map doesn't get garbage collected while the program has a reference to it. So we are left in a state where the map holds the refcnt on the program stopping it from being removed and releasing the map refcnt. And vice versa the program holds a refcnt on the map stopping it from releasing the refcnt on the prog. All this is fine as long as users detach the program while the map fd is still around. But, if the user omits this detach command we are left with a dangling map we can no longer release. To resolve this when the map fd is released decrement the program references and remove any reference from the map to the program. This fixes the issue with possibly dangling map and creates a user side API constraint. That is, the map fd must be held open for programs to be attached to a map. Fixes: 174a79ff95 ("bpf: sockmap with sk redirect support") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-02-06 11:39:32 +01:00
..
bpf	bpf: sockmap, fix leaking maps with attached but not detached progs	2018-02-06 11:39:32 +01:00
cgroup	string: drop __must_check from strscpy() and restore strscpy() usages in cgroup	2018-01-19 08:51:36 -08:00
configs	PM: Provide a config snippet for disabling PM	2017-12-04 15:14:48 +01:00
debug	signal: Simplify and fix kdb_send_sig	2018-01-03 18:01:08 -06:00
events	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-01-31 14:31:10 -08:00
gcov	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
irq	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-02-04 11:41:31 -08:00
livepatch	Merge branch 'for-4.16/remove-immediate' into for-linus	2018-01-31 16:36:38 +01:00
locking	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-01-30 10:44:56 -08:00
power	x86/power: Fix swsusp_arch_resume prototype	2018-02-02 23:33:50 +01:00
printk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
rcu	SCSI misc on 20180131	2018-01-31 11:23:28 -08:00
sched	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
time	Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-30 17:58:07 -08:00
trace	Mostly clean ups and small fixes	2018-02-01 13:15:23 -08:00
.gitignore
acct.c	kernel/acct.c: fix the acct->needcheck check in check_free_space()	2018-01-04 16:45:09 -08:00
async.c
audit_fsnotify.c
audit_tree.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:08:20 -08:00
audit_watch.c	audit/stable-4.13 PR 20170816	2017-08-16 16:48:34 -07:00
audit.c	Audit: remove unused audit_log_secctx function	2017-11-10 16:08:47 -05:00
audit.h	audit/stable-4.15 PR 20171113	2017-11-15 13:28:48 -08:00
auditfilter.c	audit: filter PATH records keyed on filesystem magic	2017-11-10 16:08:56 -05:00
auditsc.c	audit/stable-4.15 PR 20171113	2017-11-15 13:28:48 -08:00
backtracetest.c
bounds.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
capability.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c	sched_rr_get_interval(): move compat to native, get rid of set_fs()	2017-09-20 00:30:57 -04:00
configs.c
context_tracking.c
cpu_pm.c	PM / CPU: replace raw_notifier with atomic_notifier	2017-07-31 13:09:49 +02:00
cpu.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-12-31 12:30:34 -08:00
crash_core.c	kdump: write correct address of mem_section into vmcoreinfo	2018-01-13 10:42:48 -08:00
crash_dump.c
cred.c
delayacct.c	delayacct: Account blkio completion on the correct task	2018-01-16 03:29:36 +01:00
dma.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
elfcore.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exec_domain.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exit.c	kernel/exit.c: export abort() to modules	2018-01-04 16:45:09 -08:00
extable.c	kprobes, x86/alternatives: Use text_mutex to protect smp_alt_modules	2017-11-07 12:20:09 +01:00
fail_function.c	error-injection: Support fault injection framework	2018-01-12 17:33:38 -08:00
fork.c	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
freezer.c
futex_compat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
futex.c	futex: Fix OWNER_DEAD fixup	2018-01-24 09:58:18 +01:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-14 16:00:49 -08:00
hung_task.c
irq_work.c	irq/work: Improve the flag definitions	2018-01-08 19:43:15 +01:00
jump_label.c	sched/core: Fix cpu.max vs. cpuhotplug deadlock	2018-01-24 10:03:44 +01:00
kallsyms.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
kcmp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: fix comparison callback signature	2017-12-14 16:00:48 -08:00
kexec_core.c	x86/mm, kexec: Allow kexec to be used with SME	2017-07-18 11:38:04 +02:00
kexec_file.c	resource: Provide resource struct in resource walk callback	2017-11-07 15:35:57 +01:00
kexec_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kexec.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
kmod.c	kmod: move #ifdef CONFIG_MODULES wrapper to Makefile	2017-09-08 18:26:51 -07:00
kprobes.c	error-injection: Separate error-injection from kprobe	2018-01-12 17:33:38 -08:00
ksysfs.c	kexec: move vmcoreinfo out of the kernel's .bss section	2017-07-12 16:25:59 -07:00
kthread.c	treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts	2017-11-21 16:35:54 -08:00
latencytop.c
Makefile	error-injection: Support fault injection framework	2018-01-12 17:33:38 -08:00
memremap.c	memremap: add scheduling point to devm_memremap_pages	2017-10-03 17:54:25 -07:00
module_signing.c
module-internal.h
module.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
notifier.c
nsproxy.c
padata.c	padata: add SPDX identifier	2018-01-05 18:43:00 +11:00
panic.c	kernel/panic.c: add TAINT_AUX	2017-11-17 16:10:04 -08:00
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid_namespace.c	pid: remove pidhash	2017-11-17 16:10:04 -08:00
pid.c	init_task out-of-lining	2018-01-29 09:08:34 -08:00
profile.c
ptrace.c	Merge branch 'next-seccomp' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-01-31 13:44:45 -08:00
range.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
reboot.c	kernel/reboot.c: add devm_register_reboot_notifier()	2017-11-17 16:10:04 -08:00
relay.c	ipc, kernel, mm: annotate ->poll() instances	2017-11-27 16:20:05 -05:00
resource.c	x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages	2017-11-07 15:35:58 +01:00
seccomp.c	Merge branch 'next-seccomp' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-01-31 13:44:45 -08:00
signal.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2018-01-31 13:02:18 -08:00
smp.c	smp/core: Use lockdep to assert IRQs are disabled/enabled	2017-11-08 11:13:50 +01:00
smpboot.c	watchdog/core, powerpc: Lock cpus across reconfiguration	2017-10-04 10:53:54 +02:00
smpboot.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
softirq.c	softirq: Eliminate cond_resched_rcu_qs() in favor of cond_resched()	2017-12-04 10:28:58 -08:00
stacktrace.c
stop_machine.c
sys_ni.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sys.c	fix typo in assignment of fs default overflow gid	2017-12-14 16:01:45 -06:00
sysctl_binary.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysctl.c	mm, hugetlb: remove hugepages_treat_as_movable sysctl	2018-01-31 17:18:37 -08:00
task_work.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-17 13:57:15 +01:00
taskstats.c
test_kprobes.c	kprobes: Disable the jprobes test code	2017-10-20 11:02:54 +02:00
torture.c	torture: Save a line in stutter_wait(): while -> for	2017-12-11 09:18:30 -08:00
tracepoint.c	tracepoint: Remove smp_read_barrier_depends() from comment	2017-12-04 10:52:56 -08:00
tsacct.c
ucount.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-14 16:00:49 -08:00
umh.c	kernel/umh.c: optimize 'proc_cap_handler()'	2017-11-17 16:10:01 -08:00
up.c	smp: Avoid using two cache lines for struct call_single_data	2017-08-29 15:14:38 +02:00
user_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2017-11-16 12:20:15 -08:00
user-return-notifier.c
user.c	userns: use union in {g,u}idmap struct	2017-10-31 17:22:58 -05:00
utsname_sysctl.c
utsname.c
watchdog_hld.c	Merge branch 'linus' into core/urgent, to pick up dependent commits	2017-11-04 08:53:04 +01:00
watchdog.c	Merge branch 'linus' into sched/core, to pick up fixes	2017-11-08 10:17:15 +01:00
workqueue_internal.h	Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2017-11-06 12:26:49 -08:00
workqueue.c	Staging/IIO patches for 4.16-rc1	2018-02-01 09:51:57 -08:00