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crash_dump: use sysfs_emit in sysfs show functions

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Replace sprintf() with sysfs_emit() in sysfs show functions.  sysfs_emit()
is preferred for formatting sysfs output because it provides safer bounds
checking.  No functional changes.

Link: https://lkml.kernel.org/r/20260301125106.911980-2-thorsten.blum@linux.dev
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thorsten Blum
2026-03-01 13:51:07 +01:00
committed by Andrew Morton
parent 90c73d0bfa
commit defec2ca7c
1 changed files with 5 additions and 4 deletions
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9
kernel/crash_dump_dm_crypt.c
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@@ -6,6 +6,7 @@
#include <linux/cc_platform.h>
#include <linux/configfs.h>
#include <linux/module.h>
#include <linux/sysfs.h>
#define KEY_NUM_MAX 128 /* maximum dm crypt keys */
#define KEY_SIZE_MAX 256 /* maximum dm crypt key size */
@@ -189,7 +190,7 @@ static inline struct config_key *to_config_key(struct config_item *item)
static ssize_t config_key_description_show(struct config_item *item, char *page)
{
return sprintf(page, "%s\n", to_config_key(item)->description);
return sysfs_emit(page, "%s\n", to_config_key(item)->description);
}
static ssize_t config_key_description_store(struct config_item *item,
@@ -265,7 +266,7 @@ static struct config_item *config_keys_make_item(struct config_group *group,
static ssize_t config_keys_count_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", key_count);
return sysfs_emit(page, "%d\n", key_count);
}
CONFIGFS_ATTR_RO(config_keys_, count);
@@ -274,7 +275,7 @@ static bool is_dm_key_reused;
static ssize_t config_keys_reuse_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", is_dm_key_reused);
return sysfs_emit(page, "%d\n", is_dm_key_reused);
}
static ssize_t config_keys_reuse_store(struct config_item *item,
@@ -321,7 +322,7 @@ static bool restore;
static ssize_t config_keys_restore_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", restore);
return sysfs_emit(page, "%d\n", restore);
}
static ssize_t config_keys_restore_store(struct config_item *item,