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Yonghong Song 2310035fa0 bpf: fix incorrect kmalloc usage in lpm_trie MAP_GET_NEXT_KEY rcu region 
In commit b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE map"),
the implemented MAP_GET_NEXT_KEY callback function is guarded with rcu read lock.
In the function body, "kmalloc(size, GFP_USER | __GFP_NOWARN)" is used which may
sleep and violate rcu read lock region requirements. This patch fixed the issue
by using GFP_ATOMIC instead to avoid blocking kmalloc. Tested with
CONFIG_DEBUG_ATOMIC_SLEEP=y as suggested by Eric Dumazet.

Fixes: b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE map")
Signed-off-by: Yonghong Song <yhs@fb.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 17:33:57 +01:00
..
bpf
bpf: fix incorrect kmalloc usage in lpm_trie MAP_GET_NEXT_KEY rcu region
2018-01-23 17:33:57 +01:00
cgroup
cgroup: make cgroup.threads delegatable
2018-01-10 09:42:32 -08:00
configs
ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.
2017-08-22 18:43:23 -07:00
debug
kdb: Fix handling of kallsyms_symbol_next() return value
2017-12-06 16:12:43 -06:00
events
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2017-12-18 10:51:06 -05:00
gcov
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq
genirq/msi, x86/vector: Prevent reservation mode for non maskable MSI
2017-12-29 21:13:05 +01:00
livepatch
Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
2017-11-15 10:21:58 -08:00
locking
futex: Avoid violating the 10th rule of futex
2018-01-14 18:49:16 +01:00
power
Revert "cpuset: Make cpuset hotplug synchronous"
2017-12-04 14:41:11 -08:00
printk
remove task and stack pointer printout from oops dump
2017-12-05 08:23:20 -08:00
rcu
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
sched
delayacct: Account blkio completion on the correct task
2018-01-16 03:29:36 +01:00
time
timers: Unconditionally check deferrable base
2018-01-14 23:25:33 +01:00
trace
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2018-01-20 22:03:46 -05:00
.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
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-12-23 11:53:04 -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: Prevent overflow by strengthen input validation
2018-01-14 18:55:03 +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
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:33:11 -08:00
jump_label.c
jump_label: Invoke jump_label_test() via early_initcall()
2017-11-14 08:41:41 +01:00
kallsyms.c
kallsyms: take advantage of the new '%px' format
2017-11-29 10:30:13 -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
error-injection: Separate error-injection from kprobe
2018-01-12 17:33:38 -08:00
notifier.c
…
nsproxy.c
…
padata.c
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
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
pid: Handle failure to allocate the first pid in a pid namespace
2017-12-23 21:00:09 -06:00
profile.c
…
ptrace.c
signal: Remove kernel interal si_code magic
2017-07-24 14:30:28 -05:00
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
…
resource.c
x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages
2017-11-07 15:35:58 +01:00
seccomp.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-17 13:57:15 +01:00
signal.c
Merge branch 'akpm' (patches from Andrew)
2017-11-17 16:56:17 -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
kmemcheck: rip it out
2017-11-15 18:21:05 -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
arm64 updates for 4.15
2017-11-15 10:56:56 -08:00
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
kernel/sysctl.c: code cleanups
2017-11-17 16:10:03 -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: Fix typo suppressing CPU-hotplug statistics
2017-07-25 13:04:45 -07:00
tracepoint.c
…
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
workqueue: avoid hard lockups in show_workqueue_state()
2018-01-12 11:39:49 -08:00