Johannes Berg 87c9366e17 Revert "um: Enable CONFIG_CONSTRUCTORS" ... This reverts commit 786b2384bf ("um: Enable CONFIG_CONSTRUCTORS"). There are two issues with this commit, uncovered by Anton in tests on some (Debian) systems: 1) I completely forgot to call any constructors if CONFIG_CONSTRUCTORS isn't set. Don't recall now if it just wasn't needed on my system, or if I never tested this case. 2) With that fixed, it works - with CONFIG_CONSTRUCTORS *unset*. If I set CONFIG_CONSTRUCTORS, it fails again, which isn't totally unexpected since whatever wanted to run is likely to have to run before the kernel init etc. that calls the constructors in this case. Basically, some constructors that gcc emits (libc has?) need to run very early during init; the failure mode otherwise was that the ptrace fork test already failed: ---------------------- $ ./linux mem=512M Core dump limits : soft - 0 hard - NONE Checking that ptrace can change system call numbers...check_ptrace : child exited with exitcode 6, while expecting 0; status 0x67f Aborted ---------------------- Thinking more about this, it's clear that we simply cannot support CONFIG_CONSTRUCTORS in UML. All the cases we need now (gcov, kasan) involve not use of the __attribute__((constructor)), but instead some constructor code/entry generated by gcc. Therefore, we cannot distinguish between kernel constructors and system constructors. Thus, revert this commit. Cc: stable@vger.kernel.org [5.4+] Fixes: 786b2384bf ("um: Enable CONFIG_CONSTRUCTORS") Reported-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>		2020-01-19 22:42:06 +01:00
..
bpf	bpf: Fix passing modified ctx to ld/abs/ind instruction	2020-01-06 14:19:47 -08:00
cgroup
configs
debug
dma	lib/genalloc.c: rename addr_in_gen_pool to gen_pool_has_addr	2019-12-04 19:44:13 -08:00
events	perf/core: Add SRCU annotation for pmus list walk	2019-12-17 13:32:46 +01:00
gcov	Revert "um: Enable CONFIG_CONSTRUCTORS"	2020-01-19 22:42:06 +01:00
irq
livepatch	New tracing features:	2019-11-27 11:42:01 -08:00
locking	Revert "locking/mutex: Complain upon mutex API misuse in IRQ contexts"	2019-12-11 00:27:43 +01:00
power	Additional power management updates for 5.5-rc1	2019-12-04 10:48:09 -08:00
printk	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-12-03 09:29:50 -08:00
rcu
sched	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-12-21 10:52:10 -08:00
time	ptp: fix the race between the release of ptp_clock and cdev	2019-12-30 20:19:27 -08:00
trace	tracing: Fix indentation issue	2020-01-03 15:20:46 -05:00
.gitignore
acct.c
async.c
audit_fsnotify.c
audit_tree.c
audit_watch.c
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-11-26 16:02:40 -08:00
crash_core.c
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-04 13:55:09 -08:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	for-linus-2020-01-03	2020-01-03 11:17:14 -08:00
extable.c
fail_function.c
fork.c	clone3: ensure copy_thread_tls is implemented	2020-01-07 13:31:27 +01:00
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
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: remote coverage support	2019-12-04 19:44:14 -08:00
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kexec.c
kheaders.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
Makefile	Kbuild updates for v5.5	2019-12-02 17:35:04 -08:00
module_signature.c
module_signing.c
module-internal.h
module.c	This contains 3 changes:	2019-12-11 12:22:38 -08:00
notifier.c	kernel/notifier.c: remove blocking_notifier_chain_cond_register()	2019-12-04 19:44:12 -08:00
nsproxy.c
padata.c
panic.c
params.c
pid_namespace.c
pid.c
profile.c	kernel/profile.c: use cpumask_available to check for NULL cpumask	2019-12-04 19:44:12 -08:00
ptrace.c
range.c
reboot.c
relay.c
resource.c
rseq.c
seccomp.c	seccomp: Check that seccomp_notif is zeroed out by the user	2020-01-02 13:03:45 -08:00
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	kernel/sys.c: avoid copying possible padding bytes in copy_to_user	2019-12-04 19:44:12 -08:00
sysctl_binary.c	sysctl: Remove the sysctl system call	2019-11-26 13:03:56 -06:00
sysctl-test.c
sysctl.c	kernel: sysctl: make drop_caches write-only	2019-12-01 12:59:07 -08:00
task_work.c
taskstats.c	taskstats: fix data-race	2019-12-04 15:18:39 +01:00
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user_namespace.c
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
watchdog_hld.c
watchdog.c
workqueue_internal.h
workqueue.c	workqueue: Use pr_warn instead of pr_warning	2019-12-06 09:59:30 +01:00