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<p>Thanks for the patch, Michal.<br>
</p>
<br>
<div class="moz-cite-prefix">On Monday 26 June 2017 07:36 PM, Michal
Suchanek wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20170626140601.7106-2-msuchanek@suse.de">
<pre wrap="">Currently sysfs store handlers in fadump use if buf[0] == 'char'.
This means input "100foo" is interpreted as '1' and "01" as '0'.
Change to kstrtoint so leading zeroes and the like is handled in
expected way.
Signed-off-by: Michal Suchanek <a class="moz-txt-link-rfc2396E" href="mailto:msuchanek@suse.de"><msuchanek@suse.de></a></pre>
</blockquote>
<br>
Acked-by: Hari Bathini <a class="moz-txt-link-rfc2396E"
href="mailto:hbathini@linux.vnet.ibm.com"><hbathini@linux.vnet.ibm.com></a><br>
<br>
<blockquote type="cite"
cite="mid:20170626140601.7106-2-msuchanek@suse.de">
<pre wrap="">
---
arch/powerpc/kernel/fadump.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 5a7355381dac..241eff0b5f76 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1161,10 +1161,15 @@ static ssize_t fadump_release_memory_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
+ int input = -1;
+
if (!fw_dump.dump_active)
return -EPERM;
- if (buf[0] == '1') {
+ if (kstrtoint(buf, 0, &input))
+ return -EINVAL;
+
+ if (input == 1) {
/*
* Take away the '/proc/vmcore'. We are releasing the dump
* memory, hence it will not be valid anymore.
@@ -1198,21 +1203,25 @@ static ssize_t fadump_register_store(struct kobject *kobj,
const char *buf, size_t count)
{
int ret = 0;
+ int input = -1;
if (!fw_dump.fadump_enabled || fdm_active)
return -EPERM;
+ if (kstrtoint(buf, 0, &input))
+ return -EINVAL;
+
mutex_lock(&fadump_mutex);
- switch (buf[0]) {
- case '0':
+ switch (input) {
+ case 0:
if (fw_dump.dump_registered == 0) {
goto unlock_out;
}
/* Un-register Firmware-assisted dump */
fadump_unregister_dump(&fdm);
break;
- case '1':
+ case 1:
if (fw_dump.dump_registered == 1) {
goto unlock_out;
}
</pre>
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