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Stanislav Fomichev 551a26668c bpf: Don't EFAULT for getsockopt with optval=NULL 
[ Upstream commit 00e74ae0863827d944e36e56a4ce1e77e50edb91 ]

Some socket options do getsockopt with optval=NULL to estimate the size
of the final buffer (which is returned via optlen). This breaks BPF
getsockopt assumptions about permitted optval buffer size. Let's enforce
these assumptions only when non-NULL optval is provided.

Fixes: 0d01da6afc ("bpf: implement getsockopt and setsockopt hooks")
Reported-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/ZD7Js4fj5YyI2oLd@google.com/T/#mb68daf700f87a9244a15d01d00c3f0e5b08f49f7
Link: https://lore.kernel.org/bpf/20230418225343.553806-2-sdf@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-11 23:03:26 +09:00
..
bpf
bpf: Don't EFAULT for getsockopt with optval=NULL
2023-05-11 23:03:26 +09:00
cgroup
cgroup/cpuset: Add cpuset_can_fork() and cpuset_cancel_fork() methods
2023-04-20 12:35:14 +02:00
configs
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debug
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dma
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entry
entry/rcu: Check TIF_RESCHED _after_ delayed RCU wake-up
2023-03-30 12:49:13 +02:00
events
perf/core: Fix the same task check in perf_event_set_output
2023-04-13 16:55:32 +02:00
futex
futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error
2023-01-04 11:28:58 +01:00
gcov
gcov: add support for checksum field
2022-12-31 13:33:11 +01:00
irq
genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()
2023-03-11 13:55:29 +01:00
kcsan
kcsan: avoid passing -g for test
2023-04-06 12:10:35 +02:00
livepatch
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locking
locking/rwsem: Prevent non-first waiter from spinning in down_write() slowpath
2023-03-10 09:34:06 +01:00
module
module: Don't wait for GOING modules
2023-02-01 08:34:37 +01:00
power
PM: EM: fix memory leak with using debugfs_lookup()
2023-03-10 09:33:53 +01:00
printk
kernel/printk/index.c: fix memory leak with using debugfs_lookup()
2023-03-11 13:55:32 +01:00
rcu
rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
2023-05-11 23:03:02 +09:00
sched
sched/fair: Fixes for capacity inversion detection
2023-04-26 14:28:42 +02:00
time
tick/common: Align tick period with the HZ tick.
2023-05-11 23:03:16 +09:00
trace
tracing: Fix permissions for the buffer_percent file
2023-05-11 23:03:04 +09:00
.gitignore
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acct.c
acct: fix potential integer overflow in encode_comp_t()
2022-12-31 13:32:58 +01:00
async.c
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audit_fsnotify.c
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audit_tree.c
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audit_watch.c
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audit.c
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audit.h
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auditfilter.c
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auditsc.c
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backtracetest.c
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bounds.c
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capability.c
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cfi.c
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compat.c
sched_getaffinity: don't assume 'cpumask_size()' is fully initialized
2023-04-06 12:10:40 +02:00
configs.c
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context_tracking.c
context_tracking: Fix noinstr vs KASAN
2023-03-10 09:33:45 +01:00
cpu_pm.c
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cpu.c
cpu/hotplug: Do not bail-out in DYING/STARTING sections
2022-12-31 13:31:59 +01:00
crash_core.c
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crash_dump.c
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cred.c
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delayacct.c
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dma.c
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exec_domain.c
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exit.c
exit: Detect and fix irq disabled state in oops
2023-03-10 09:33:45 +01:00
extable.c
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fail_function.c
kernel/fail_function: fix memory leak with using debugfs_lookup()
2023-03-11 13:55:39 +01:00
fork.c
mm: enable maple tree RCU mode by default.
2023-04-13 16:55:40 +02:00
freezer.c
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gen_kheaders.sh
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groups.c
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hung_task.c
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iomem.c
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irq_work.c
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jump_label.c
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kallsyms_internal.h
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kallsyms.c
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kcmp.c
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Kconfig.freezer
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Kconfig.hz
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Kconfig.locks
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Kconfig.preempt
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kcov.c
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kexec_core.c
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kexec_elf.c
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kexec_file.c
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kexec_internal.h
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kexec.c
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kheaders.c
kheaders: Use array declaration instead of char
2023-05-11 23:03:02 +09:00
kmod.c
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kprobes.c
kprobes: Fix to handle forcibly unoptimized kprobes on freeing_list
2023-03-10 09:34:27 +01:00
ksysfs.c
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kthread.c
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latencytop.c
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Makefile
cfi: Fix CFI failure with KASAN
2022-12-31 13:33:08 +01:00
module_signature.c
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notifier.c
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nsproxy.c
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padata.c
padata: Fix list iterator in padata_do_serial()
2022-12-31 13:32:34 +01:00
panic.c
panic: fix the panic_print NMI backtrace setting
2023-03-10 09:34:25 +01:00
params.c
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pid_namespace.c
rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes()
2023-03-10 09:32:52 +01:00
pid.c
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profile.c
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ptrace.c
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range.c
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reboot.c
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regset.c
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relay.c
relayfs: fix out-of-bounds access in relay_file_read
2023-05-11 23:03:03 +09:00
resource_kunit.c
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resource.c
dax/kmem: Fix leak of memory-hotplug resources
2023-03-10 09:34:25 +01:00
rseq.c
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scftorture.c
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scs.c
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seccomp.c
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signal.c
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smp.c
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smpboot.c
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smpboot.h
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softirq.c
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stackleak.c
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stacktrace.c
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static_call_inline.c
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static_call.c
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stop_machine.c
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sys_ni.c
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sys.c
kernel/sys.c: fix and improve control flow in __sys_setres[ug]id()
2023-04-26 14:28:39 +02:00
sysctl-test.c
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sysctl.c
proc: proc_skip_spaces() shouldn't think it is working on C strings
2022-12-05 12:09:06 -08:00
task_work.c
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taskstats.c
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torture.c
torture: Fix hang during kthread shutdown phase
2023-03-10 09:34:07 +01:00
tracepoint.c
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tsacct.c
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ucount.c
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uid16.c
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uid16.h
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umh.c
freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL
2023-02-22 12:59:50 +01:00
up.c
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user_namespace.c
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user-return-notifier.c
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user.c
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usermode_driver.c
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utsname_sysctl.c
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utsname.c
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watch_queue.c
watch_queue: fix IOC_WATCH_QUEUE_SET_SIZE alloc error paths
2023-03-17 08:50:30 +01:00
watchdog_hld.c
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watchdog.c
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workqueue_internal.h
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workqueue.c
workqueue: Protects wq_unbound_cpumask with wq_pool_attach_mutex
2023-03-10 09:32:53 +01:00