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Randy Dunlap 79467b9563 dma-debug: fix return value of __setup handlers 
[ Upstream commit 80e4390981618e290616dbd06ea190d4576f219d ]

When valid kernel command line parameters
  dma_debug=off dma_debug_entries=100
are used, they are reported as Unknown parameters and added to init's
environment strings, polluting it.

  Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
    dma_debug=off dma_debug_entries=100", will be passed to user space.

and

 Run /sbin/init as init process
   with arguments:
     /sbin/init
   with environment:
     HOME=/
     TERM=linux
     BOOT_IMAGE=/boot/bzImage-517rc5
     dma_debug=off
     dma_debug_entries=100

Return 1 from these __setup handlers to indicate that the command line
option has been handled.

Fixes: 59d3daafa1 ("dma-debug: add kernel command line parameters")
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: Joerg Roedel <joro@8bytes.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: iommu@lists.linux-foundation.org
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2022-04-15 14:18:18 +02:00
..
bpf bpf: Add kconfig knob for disabling unpriv bpf by default 2022-02-16 12:52:49 +01:00
cgroup cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug 2022-03-02 11:41:00 +01:00
configs
…
debug kdb: Make memory allocations more robust 2021-03-04 10:26:10 +01:00
dma dma-debug: fix return value of __setup handlers 2022-04-15 14:18:18 +02:00
events perf/core: Fix address filter parser for multiple filters 2022-04-15 14:18:06 +02:00
gcov gcov: re-fix clang-11+ support 2021-04-14 08:24:10 +02:00
irq genirq/timings: Fix error return code in irq_timings_test_irqs() 2021-09-15 09:47:29 +02:00
livepatch
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locking locking/lockdep: Avoid RCU-induced noinstr fail 2021-11-17 09:48:28 +01:00
power PM: suspend: fix return value of __setup handler 2022-04-15 14:18:05 +02:00
printk printk: fix return value of printk.devkmsg __setup handler 2022-04-15 14:18:08 +02:00
rcu rcu: Don't deboost before reporting expedited quiescent state 2022-03-28 08:46:48 +02:00
sched sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa 2022-04-15 14:18:06 +02:00
time timekeeping: Really make sure wall_to_monotonic isn't positive 2021-12-22 09:29:39 +01:00
trace tracing: Ensure trace buffer is at least 4096 bytes large 2022-03-16 13:21:47 +01:00
.gitignore kbuild: update config_data.gz only when the content of .config is changed 2021-05-11 14:04:16 +02:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
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Makefile kbuild: update config_data.gz only when the content of .config is changed 2021-05-11 14:04:16 +02:00
acct.c
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async.c Revert "module, async: async_synchronize_full() on module init iff async is used" 2022-02-23 11:59:56 +01:00
audit.c audit: improve audit queue handling when "audit=1" on cmdline 2022-02-08 18:24:26 +01:00
audit.h audit: log AUDIT_TIME_* records only from rules 2022-04-15 14:18:04 +02:00
audit_fsnotify.c
…
audit_tree.c audit: move put_tree() to avoid trim_trees refcount underflow and UAF 2021-09-03 10:08:16 +02:00
audit_watch.c audit: CONFIG_CHANGE don't log internal bookkeeping as an event 2020-10-01 13:17:32 +02:00
auditfilter.c
…
auditsc.c audit: log AUDIT_TIME_* records only from rules 2022-04-15 14:18:04 +02:00
backtracetest.c
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bounds.c
…
capability.c
…
compat.c
…
configs.c
…
context_tracking.c
…
cpu.c cpu/hotplug: Cure the cpusets trainwreck 2021-07-19 08:53:15 +02:00
cpu_pm.c
…
crash_core.c
…
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
exec_domain.c
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exit.c don't dump the threads that had been already exiting when zapped. 2020-11-18 19:20:31 +01:00
extable.c
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fail_function.c fail_function: Remove a redundant mutex unlock 2020-11-24 13:29:18 +01:00
fork.c copy_process(): Move fd_install() out of sighand->siglock critical section 2022-02-23 12:00:00 +01:00
freezer.c
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futex.c mm, futex: fix shared futex pgoff on shmem huge page 2021-06-30 08:47:55 -04:00
gen_kheaders.sh kbuild: add variables for compression tools 2020-09-03 11:27:10 +02:00
groups.c
…
hung_task.c
…
iomem.c
…
irq_work.c
…
jump_label.c
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kallsyms.c kallsyms: Refactor kallsyms_show_value() to take cred 2020-07-16 08:16:44 +02:00
kcmp.c exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:44:55 +01:00
kcov.c
…
kexec.c
…
kexec_core.c kernel: kexec: remove the lock operation of system_transition_mutex 2021-02-03 23:25:56 +01:00
kexec_elf.c
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kexec_file.c kernel: kexec_file: fix error return code of kexec_calculate_store_digests() 2021-05-19 10:08:28 +02:00
kexec_internal.h
…
kheaders.c
…
kmod.c
…
kprobes.c kprobes: Limit max data_size of the kretprobe instances 2021-12-08 09:01:10 +01:00
ksysfs.c
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kthread.c kthread: Fix PF_KTHREAD vs to_kthread() race 2021-09-12 08:56:39 +02:00
latencytop.c
…
module-internal.h
…
module.c module/ftrace: handle patchable-function-entry 2022-02-23 11:59:56 +01:00
module_signature.c module: harden ELF info handling 2021-04-07 14:47:38 +02:00
module_signing.c module: harden ELF info handling 2021-04-07 14:47:38 +02:00
notifier.c kernel/notifier.c: intercept duplicate registrations to avoid infinite loops 2020-10-01 13:17:23 +02:00
nsproxy.c
…
padata.c
…
panic.c
…
params.c
…
pid.c
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pid_namespace.c memcg: enable accounting for pids in nested pid namespaces 2021-09-22 12:26:37 +02:00
profile.c profiling: fix shift-out-of-bounds bugs 2021-09-26 14:07:09 +02:00
ptrace.c ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE 2022-04-15 14:17:58 +02:00
range.c
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reboot.c reboot: fix overflow parsing reboot cpu number 2020-11-18 19:20:30 +01:00
relay.c kernel/relay.c: fix memleak on destroy relay channel 2020-08-26 10:40:51 +02:00
resource.c
…
rseq.c
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seccomp.c seccomp: Invalidate seccomp mode to catch death failures 2022-02-16 12:52:53 +01:00
signal.c signal: Remove the bogus sigkill_pending in ptrace_stop 2021-11-17 09:48:24 +01:00
smp.c smp: Fix smp_call_function_single_async prototype 2021-05-14 09:44:33 +02:00
smpboot.c kthread: Extract KTHREAD_IS_PER_CPU 2021-02-07 15:35:49 +01:00
smpboot.h
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softirq.c
…
stackleak.c
…
stacktrace.c
…
stop_machine.c
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sys.c prctl: allow to setup brk for et_dyn executables 2021-09-26 14:07:08 +02:00
sys_ni.c
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sysctl-test.c kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() 2020-10-01 13:17:10 +02:00
sysctl.c x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting 2022-03-11 11:22:37 +01:00
sysctl_binary.c
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task_work.c
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taskstats.c
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test_kprobes.c
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torture.c
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tracepoint.c tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing 2021-07-14 16:53:08 +02:00
tsacct.c taskstats: Cleanup the use of task->exit_code 2022-02-23 11:59:57 +01:00
ucount.c
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uid16.c
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uid16.h
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umh.c usermodehelper: reset umask to default before executing user process 2020-10-14 10:32:58 +02:00
up.c smp: Fix smp_call_function_single_async prototype 2021-05-14 09:44:33 +02:00
user-return-notifier.c
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user.c
…
user_namespace.c
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utsname.c
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utsname_sysctl.c
…
watchdog.c
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watchdog_hld.c
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workqueue.c workqueue: Fix unbind_workers() VS wq_worker_running() race 2022-01-16 09:15:38 +01:00
workqueue_internal.h
…