Randy Dunlap f64b0e4547 printk: fix return value of printk.devkmsg __setup handler ... [ Upstream commit b665eae7a7 ] If an invalid option value is used with "printk.devkmsg=<value>", it is silently ignored. If a valid option value is used, it is honored but the wrong return value (0) is used, indicating that the command line option had an error and was not handled. This string is not added to init's environment strings due to init/main.c::unknown_bootoption() checking for a '.' in the boot option string and then considering that string to be an "Unused module parameter". Print a warning message if a bad option string is used. Always return 1 from the __setup handler to indicate that the command line option has been handled. Fixes: 750afe7bab ("printk: add kernel parameter to control writes to /dev/kmsg") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru> Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: John Ogness <john.ogness@linutronix.de> Reviewed-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20220228220556.23484-1-rdunlap@infradead.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-20 09:06:33 +02:00
..
bpf	bpf: Add kconfig knob for disabling unpriv bpf by default	2022-02-16 12:43:54 +01:00
configs
debug	kdb: Make memory allocations more robust	2021-03-03 17:44:31 +01:00
events	perf/core: Fix address filter parser for multiple filters	2022-04-20 09:06:32 +02:00
gcov	gcov: add support for GCC 10.1	2020-09-23 08:46:14 +02:00
irq	genirq: Disable interrupts for force threaded handlers	2021-03-24 10:59:26 +01:00
livepatch
locking	locking/lockdep: Avoid RCU-induced noinstr fail	2021-11-26 11:48:27 +01:00
power	PM: suspend: fix return value of __setup handler	2022-04-20 09:06:31 +02:00
printk	printk: fix return value of printk.devkmsg __setup handler	2022-04-20 09:06:33 +02:00
rcu	rcuperf: Fix cleanup path for invalid perf_type strings	2019-05-31 06:48:30 -07:00
sched	sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa	2022-04-20 09:06:32 +02:00
time	timekeeping: Really make sure wall_to_monotonic isn't positive	2021-12-22 09:05:14 +01:00
trace	tracing: Ensure trace buffer is at least 4096 bytes large	2022-03-16 12:49:01 +01:00
.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: fix a net reference leak in audit_list_rules_send()	2021-04-07 12:05:41 +02:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2021-04-07 12:05:41 +02:00
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: CONFIG_CHANGE don't log internal bookkeeping as an event	2020-10-01 20:40:07 +02:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2021-04-07 12:05:41 +02:00
auditsc.c	audit: print empty EXECVE args	2019-11-28 18:28:55 +01:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:16:57 -08:00
capability.c
cgroup.c	cgroup-v1: Require capabilities to set release_agent	2022-02-11 08:41:17 +01:00
cgroup_freezer.c
cgroup_pids.c	cgroup: pids: use atomic64_t for pids->limit	2019-12-21 10:42:02 +01:00
compat.c
configs.c
context_tracking.c
cpu.c	kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling	2020-12-29 13:44:50 +01:00
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-06-20 10:24:21 +02:00
cpuset.c
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-12 11:24:13 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c	futex: Mark the begin of futex exit explicitly	2021-02-03 23:19:49 +01:00
extable.c
fork.c	mm/hugetlb: initialize hugetlb_usage in mm_init	2021-09-22 11:43:08 +02:00
freezer.c
futex.c	mm, futex: fix shared futex pgoff on shmem huge page	2021-07-11 12:46:40 +02:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:29:52 +01:00
hung_task.c	kernel: hung_task.c: disable on suspend	2019-04-20 09:07:52 +02:00
irq_work.c
jump_label.c
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_core.c	objtool, x86: Add several functions and files to the objtool whitelist	2018-06-05 10:28:57 +02:00
kexec_file.c	kernel: kexec_file: fix error return code of kexec_calculate_store_digests()	2021-05-22 10:40:31 +02:00
kexec_internal.h
kmod.c	usermodehelper: reset umask to default before executing user process	2020-10-14 09:48:14 +02:00
kprobes.c	kprobes: Limit max data_size of the kretprobe instances	2021-12-08 08:45:06 +01:00
ksysfs.c
kthread.c	kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()	2021-07-11 12:46:41 +02:00
latencytop.c
Makefile	elfcore: fix building with clang	2021-02-10 09:09:25 +01:00
membarrier.c
memremap.c	mm, devm_memremap_pages: kill mapping "System RAM" support	2019-01-13 10:03:51 +01:00
module-internal.h
module.c	module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols	2021-03-03 17:44:44 +01:00
module_signing.c
notifier.c	x86/mm: split vmalloc_sync_all()	2020-04-02 17:20:26 +02:00
nsproxy.c
padata.c	padata: purge get_cpu and reorder_via_wq from padata_do_serial	2020-05-27 16:41:53 +02:00
panic.c	panic: ensure preemption is disabled during panic()	2019-10-17 13:42:25 -07:00
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	memcg: enable accounting for pids in nested pid namespaces	2021-09-22 11:43:08 +02:00
profile.c	profiling: fix shift-out-of-bounds bugs	2021-09-26 13:36:18 +02:00
ptrace.c	ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE	2022-04-20 09:06:28 +02:00
range.c
reboot.c	reboot: fix overflow parsing reboot cpu number	2020-11-18 18:26:32 +01:00
relay.c	kernel/relay.c: fix memleak on destroy relay channel	2020-08-26 10:29:03 +02:00
resource.c	resource: fix integer overflow at reallocation	2018-04-24 09:34:09 +02:00
seccomp.c	seccomp: Add missing return in non-void function	2021-03-03 17:44:43 +01:00
signal.c	signal: Remove the bogus sigkill_pending in ptrace_stop	2021-11-26 11:48:24 +01:00
smp.c	cpu/hotplug: Fix SMT supported evaluation	2018-08-15 18:14:53 +02:00
smpboot.c
smpboot.h
softirq.c	Mark HI and TASKLET softirq synchronous	2018-08-15 18:14:42 +02:00
stacktrace.c
stop_machine.c	stop_machine: Use raw spinlocks	2018-08-03 07:55:24 +02:00
sys.c	prctl: allow to setup brk for et_dyn executables	2021-09-26 13:36:18 +02:00
sys_ni.c
sysctl.c	x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting	2022-03-11 10:03:31 +01:00
sysctl_binary.c
task_work.c
taskstats.c	taskstats: fix data-race	2020-01-12 11:24:12 +01:00
test_kprobes.c
torture.c
tracepoint.c	tracepoint: Do not fail unregistering a probe due to memory failure	2021-03-03 17:44:38 +01:00
tsacct.c	taskstats: Cleanup the use of task->exit_code	2022-02-23 11:56:40 +01:00
ucount.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:29:52 +01:00
up.c
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
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 20:01:24 +02:00
watchdog.c
watchdog_hld.c
workqueue.c	workqueue: fix UAF in pwq_unbound_release_workfn()	2021-08-04 11:58:01 +02:00
workqueue_internal.h