Jessica Yu f5b9595f03 module: exclude SHN_UNDEF symbols from kallsyms api ... [ Upstream commit 9f2d1e68cf ] Livepatch modules are special in that we preserve their entire symbol tables in order to be able to apply relocations after module load. The unwanted side effect of this is that undefined (SHN_UNDEF) symbols of livepatch modules are accessible via the kallsyms api and this can confuse symbol resolution in livepatch (klp_find_object_symbol()) and cause subtle bugs in livepatch. Have the module kallsyms api skip over SHN_UNDEF symbols. These symbols are usually not available for normal modules anyway as we cut down their symbol tables to just the core (non-undefined) symbols, so this should really just affect livepatch modules. Note that this patch doesn't affect the display of undefined symbols in /proc/kallsyms. Reported-by: Josh Poimboeuf <jpoimboe@redhat.com> Tested-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jessica Yu <jeyu@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-10-03 17:01:48 -07:00
..
bpf	bpf: fix references to free_bpf_prog_info() in comments	2018-08-03 07:55:23 +02:00
configs	config: android: enable CONFIG_SECCOMP	2016-10-11 15:06:32 -07:00
debug	kdb: make "mdr" command repeat	2018-05-30 07:50:51 +02:00
events	perf/core: Force USER_DS when recording user stack data	2018-09-26 08:36:37 +02:00
gcov	gcov: support GCC 7.1	2017-09-02 07:07:53 +02:00
irq	genirq: Make force irq threading setup more robust	2018-08-09 12:17:57 +02:00
livepatch	livepatch/module: make TAINT_LIVEPATCH module-specific	2016-08-26 14:42:08 +02:00
locking	locking/osq_lock: Fix osq_lock queue corruption	2018-09-19 22:47:11 +02:00
power	PM / sleep: wakeup: Fix build error caused by missing SRCU support	2018-09-09 20:01:23 +02:00
printk	printk/tracing: Do not trace printk_nmi_enter()	2018-09-09 20:01:25 +02:00
rcu	rcu: Call touch_nmi_watchdog() while printing stall warnings	2018-05-30 07:50:50 +02:00
sched	sched/fair: Fix vruntime_normalized() for remote non-migration wakeup	2018-09-29 03:07:34 -07:00
time	alarmtimer: Prevent overflow for relative nanosleep	2018-10-03 17:01:45 -07:00
trace	ring-buffer: Allow for rescheduling when removing pages	2018-09-29 03:07:32 -07:00
.gitignore
acct.c	kernel/acct.c: fix the acct->needcheck check in check_free_space()	2018-01-10 09:29:51 +01:00
async.c	kernel/async.c: revert "async: simplify lowest_in_progress()"	2018-02-17 13:21:18 +01:00
audit.c	audit: return on memory error to avoid null pointer dereference	2018-05-30 07:50:49 +02:00
audit.h	Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit	2016-07-29 17:54:17 -07:00
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: fix use-after-free in audit_add_watch	2018-09-26 08:36:37 +02:00
auditfilter.c	audit: allow not equal op for audit by executable	2018-08-03 07:55:25 +02:00
auditsc.c	audit: allow not equal op for audit by executable	2018-08-03 07:55:25 +02:00
backtracetest.c
bounds.c
capability.c	ptrace: Capture the ptracer's creds not PT_PTRACE_CAP	2017-01-06 10:40:13 +01:00
cgroup.c	cgroup: fix error return value from cgroup_subtree_control()	2017-08-11 08:49:28 -07:00
cgroup_freezer.c
cgroup_pids.c	cgroup/pids: remove spurious suspicious RCU usage warning	2017-03-26 13:05:58 +02:00
compat.c
configs.c
context_tracking.c
cpu.c	cpu/hotplug: Non-SMP machines do not make use of booted_once	2018-08-15 18:14:55 +02:00
cpu_pm.c
cpuset.c	sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs	2017-10-12 11:51:25 +02:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	kernel/exit.c: avoid undefined behaviour when calling wait4()	2018-05-19 10:27:01 +02:00
extable.c	kernel/extable.c: mark core_kernel_text notrace	2017-07-21 07:42:21 +02:00
fork.c	kthread: Fix use-after-free if kthread fork fails	2018-09-19 22:47:10 +02:00
freezer.c
futex.c	futex: futex_wake_op, fix sign_extend32 sign bits	2018-05-19 10:27:00 +02:00
futex_compat.c
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:29:52 +01:00
hung_task.c	hung_task: allow hung_task_panic when hung_task_warnings is 0	2016-10-11 15:06:33 -07:00
irq_work.c
jump_label.c	jump_label: Invoke jump_label_test() via early_initcall()	2017-12-14 09:28:24 +01:00
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: ensure irq code sees a valid area	2018-08-03 07:55:12 +02:00
kexec.c	kexec: allow architectures to override boot mapping	2016-08-02 19:35:27 -04:00
kexec_core.c	objtool, x86: Add several functions and files to the objtool whitelist	2018-06-05 10:28:57 +02:00
kexec_file.c	kexec: fix double-free when failing to relocate the purgatory	2016-09-01 17:52:01 -07:00
kexec_internal.h
kmod.c
kprobes.c	kprobes: Make list and blacklist root user read only	2018-09-05 09:20:10 +02:00
ksysfs.c	kexec: add a kexec_crash_loaded() function	2016-08-02 19:35:30 -04:00
kthread.c	kthread, tracing: Don't expose half-written comm when creating kthreads	2018-08-03 07:55:12 +02:00
latencytop.c
Makefile	kernel/watchdog.c: move hardlockup detector to separate file	2017-06-17 06:41:57 +02:00
membarrier.c	Fix: Disable sys_membarrier when nohz_full is enabled	2017-03-12 06:41:45 +01:00
memremap.c	mm: Fix devm_memremap_pages() collision handling	2018-02-28 10:18:34 +01:00
module-internal.h
module.c	module: exclude SHN_UNDEF symbols from kallsyms api	2018-10-03 17:01:48 -07:00
module_signing.c
notifier.c
nsproxy.c
padata.c	padata: free correct variable	2017-05-20 14:28:40 +02:00
panic.c	kernel/panic.c: add missing \n	2017-07-05 14:40:24 +02:00
params.c
pid.c	pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()	2018-04-13 19:47:53 +02:00
pid_namespace.c	pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes	2017-05-25 15:44:38 +02:00
profile.c
ptrace.c	ptrace: Properly initialize ptracer_cred on fork	2017-06-14 15:05:54 +02:00
range.c
reboot.c
relay.c	kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE	2018-05-30 07:50:29 +02:00
resource.c	resource: fix integer overflow at reallocation	2018-04-24 09:34:09 +02:00
seccomp.c	seccomp: Move speculation migitation control to arch code	2018-05-22 16:58:02 +02:00
signal.c	kernel/signal.c: avoid undefined behaviour in kill_something_info	2018-05-30 07:50:18 +02:00
smp.c	cpu/hotplug: Fix SMT supported evaluation	2018-08-15 18:14:53 +02:00
smpboot.c	kthread/smpboot: do not park in kthread_create_on_cpu()	2016-10-11 15:06:33 -07:00
smpboot.h
softirq.c	Mark HI and TASKLET softirq synchronous	2018-08-15 18:14:42 +02:00
stacktrace.c	stacktrace, lockdep: Fix address, newline ugliness	2017-02-14 15:25:42 -08:00
stop_machine.c	stop_machine: Use raw spinlocks	2018-08-03 07:55:24 +02:00
sys.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 20:01:24 +02:00
sys_ni.c	x86/pkeys: Fix pkeys build breakage for some non-x86 arches	2016-09-13 14:41:36 +02:00
sysctl.c	sched/sysctl: Check user input value of sysctl_sched_time_avg	2018-09-05 09:20:04 +02:00
sysctl_binary.c
task_work.c	task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works	2016-08-02 19:35:02 -04:00
taskstats.c	taskstats: fix the length of cgroupstats_cmd_get_policy	2016-11-03 16:55:58 -04:00
test_kprobes.c
torture.c	torture: Convert torture_shutdown() to hrtimer	2016-08-22 10:01:49 -07:00
tracepoint.c	tracepoint: Do not warn on ENOMEM	2018-05-09 09:50:20 +02:00
tsacct.c
ucount.c	kernel/ucount.c: mark user_header with kmemleak_ignore()	2017-06-17 06:41:51 +02:00
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:29:52 +01:00
up.c	smp: Add function to execute a function synchronously on a CPU	2016-09-05 13:52:39 +02:00
user-return-notifier.c
user.c
user_namespace.c	userns: move user access out of the mutex	2018-09-09 20:01:24 +02:00
utsname.c	Merge branch 'nsfs-ioctls' into HEAD	2016-09-22 20:00:36 -05:00
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 20:01:24 +02:00
watchdog.c	kernel/watchdog: prevent false hardlockup on overloaded system	2017-06-17 06:41:57 +02:00
watchdog_hld.c	kernel/watchdog: prevent false hardlockup on overloaded system	2017-06-17 06:41:57 +02:00
workqueue.c	workqueue: use put_device() instead of kfree()	2018-05-30 07:50:36 +02:00
workqueue_internal.h	workqueue: Fix NULL pointer dereference	2017-11-15 15:53:17 +01:00