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He Zhe 3404019d6d printk: Give error on attempt to set log buffer length to over 2G 
[ Upstream commit e6fe3e5b7d16e8f146a4ae7fe481bc6e97acde1e ]

The current printk() is ready to handle log buffer size up to 2G.
Give an explicit error for users who want to use larger log buffer.

Also fix printk formatting to show the 2G as a positive number.

Link: http://lkml.kernel.org/r/20181008135916.gg4kkmoki5bgtco5@pathway.suse.cz
Cc: rostedt@goodmis.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: He Zhe <zhe.he@windriver.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
[pmladek: Fixed to the really safe limit 2GB.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-11-24 08:20:46 +01:00
..
bpf
bpf: fix use after free in prog symbol exposure
2019-10-07 18:57:19 +02:00
cgroup
cgroup: Fix css_task_iter_advance_css_set() cset skip condition
2019-08-09 17:52:35 +02:00
configs
kconfig: tinyconfig: remove stale stack protector fixups
2018-06-15 07:15:28 +09:00
debug
kdb: Don't back trace on a cpu that didn't round up
2019-02-12 19:47:19 +01:00
dma
dma-direct: do not include SME mask in the DMA supported check
2019-01-13 09:51:05 +01:00
events
signal: Properly deliver SIGILL from uprobes
2019-11-20 18:46:22 +01:00
gcov
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
irq
genirq: Prevent NULL pointer dereference in resend_irqs()
2019-09-19 09:09:34 +02:00
livepatch
livepatch: Nullify obj->mod in klp_module_coming()'s error path
2019-10-07 18:57:10 +02:00
locking
Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"
2019-10-11 18:21:06 +02:00
power
x86/power: Fix 'nosmt' vs hibernation triple fault during resume
2019-06-11 12:20:52 +02:00
printk
printk: Give error on attempt to set log buffer length to over 2G
2019-11-24 08:20:46 +01:00
rcu
rcuperf: Fix cleanup path for invalid perf_type strings
2019-05-31 06:46:30 -07:00
sched
sched/debug: Explicitly cast sched_feat() to bool
2019-11-20 18:46:13 +01:00
time
y2038: make do_gettimeofday() and get_seconds() inline
2019-11-20 18:45:24 +01:00
trace
tracing: Fix "gfp_t" format for synthetic events
2019-11-10 11:27:28 +01:00
.gitignore
…
acct.c
acct_on(): don't mess with freeze protection
2019-05-31 06:46:05 -07:00
async.c
…
audit_fsnotify.c
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
audit_tree.c
\n
2018-08-17 09:41:28 -07:00
audit_watch.c
audit: fix use-after-free in audit_add_watch
2018-07-18 11:43:36 -04:00
audit.c
audit: use ktime_get_coarse_real_ts64() for timestamps
2018-07-17 14:45:08 -04:00
audit.h
…
auditfilter.c
audit: fix a memory leak bug
2019-05-31 06:46:17 -07:00
auditsc.c
audit/stable-4.18 PR 20180814
2018-08-15 10:46:54 -07:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-11-13 11:08:47 -08:00
capability.c
…
compat.c
time: Enable get/put_compat_itimerspec64 always
2018-06-24 14:39:47 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/SMT: State SMT is disabled even with nosmt and without "=force"
2019-11-24 08:20:18 +01:00
crash_core.c
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
crash_dump.c
…
cred.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-07-31 07:27:11 +02:00
delayacct.c
delayacct: Use raw_spinlocks
2018-04-27 14:34:51 +02:00
dma.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
elfcore.c
kernel/elfcore.c: include proper prototypes
2019-10-11 18:21:23 +02:00
exec_domain.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
exit.c
cgroup: Call cgroup_release() before __exit_signal()
2019-08-09 17:52:34 +02:00
extable.c
…
fail_function.c
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
fork.c
kernel/sysctl.c: do not override max_threads provided by userspace
2019-10-17 13:45:19 -07:00
freezer.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
futex_compat.c
…
futex.c
locking/futex: Allow low-level atomic operations to return -EAGAIN
2019-05-10 17:54:11 +02:00
groups.c
…
hung_task.c
kernel: hung_task.c: disable on suspend
2019-04-20 09:16:02 +02:00
iomem.c
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
irq_work.c
irq_work: Do not raise an IPI when queueing work on the local CPU
2019-05-31 06:46:19 -07:00
jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
kallsyms.c
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
2019-09-21 07:17:02 +02:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
kcov.c
kernel/kcov.c: mark write_comp_data() as notrace
2019-02-12 19:47:20 +01:00
kexec_core.c
kexec: Allocate decrypted control pages for kdump if SME is enabled
2019-11-24 08:20:29 +01:00
kexec_file.c
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
kexec_internal.h
…
kexec.c
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kmod.c
…
kprobes.c
kprobes: Don't call BUG_ON() if there is a kprobe in use on free list
2019-11-20 18:46:30 +01:00
ksysfs.c
…
kthread.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
latencytop.c
…
Makefile
x86/uaccess, kcov: Disable stack protector
2019-06-19 08:18:01 +02:00
memremap.c
mm, devm_memremap_pages: add MEMORY_DEVICE_PRIVATE support
2019-01-13 09:51:04 +01:00
module_signing.c
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module-internal.h
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module.c
modules: fix compile error if don't have strict module rwx
2019-09-19 09:09:40 +02:00
notifier.c
…
nsproxy.c
…
padata.c
padata: use smp_mb in padata_reorder to avoid orphaned padata jobs
2019-07-26 09:14:25 +02:00
panic.c
panic: ensure preemption is disabled during panic()
2019-10-17 13:44:46 -07:00
params.c
kernel/params.c: downgrade warning for unsafe parameters
2018-04-11 10:28:37 -07:00
pid_namespace.c
signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig
2019-07-26 09:14:01 +02:00
pid.c
Fix failure path in alloc_pid()
2019-01-13 09:51:06 +01:00
profile.c
…
ptrace.c
ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME
2019-07-10 09:53:41 +02:00
range.c
…
reboot.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
relay.c
relay: check return of create_buf_file() properly
2019-03-13 14:02:35 -07:00
resource.c
resource: fix locking in find_next_iomem_res()
2019-09-16 08:22:20 +02:00
rseq.c
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
seccomp.c
audit/stable-4.18 PR 20180605
2018-06-06 16:34:00 -07:00
signal.c
signal: Always ignore SIGKILL and SIGSTOP sent to the global init
2019-11-20 18:46:21 +01:00
smp.c
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
2019-02-12 19:47:25 +01:00
smpboot.c
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
smpboot.h
…
softirq.c
nohz: Fix missing tick reprogram when interrupting an inline softirq
2018-08-03 15:52:10 +02:00
stacktrace.c
…
stop_machine.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
sys_ni.c
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
sys.c
kernel/sys.c: prctl: fix false positive in validate_prctl_map()
2019-06-15 11:54:01 +02:00
sysctl_binary.c
staging: irda: remove remaining remants of irda code removal
2018-04-16 11:26:49 +02:00
sysctl.c
sysctl: return -EINVAL if val violates minmax
2019-06-15 11:53:59 +02:00
task_work.c
…
taskstats.c
…
test_kprobes.c
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture.c
torture: Keep old-school dmesg format
2018-06-25 11:30:10 -07:00
tracepoint.c
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
tsacct.c
…
ucount.c
…
uid16.c
…
uid16.h
…
umh.c
umh: fix race condition
2018-06-07 16:56:28 -04:00
up.c
…
user_namespace.c
userns: also map extents in the reverse map to kernel IDs
2018-11-13 11:09:00 -08:00
user-return-notifier.c
…
user.c
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
utsname.c
…
watchdog_hld.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog.c
watchdog: Respect watchdog cpumask on CPU hotplug
2019-04-03 06:26:29 +02:00
workqueue_internal.h
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
workqueue.c
workqueue: Try to catch flush_work() without INIT_WORK().
2019-05-02 09:58:56 +02:00