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kasan: reorder reporting functions 

Move print_error_description()'s, report_suppressed()'s, and
report_enabled()'s definitions to improve the logical order of function
definitions in report.c.

No functional changes.

Link: https://lkml.kernel.org/r/82aa926c411e00e76e97e645a551ede9ed0c5e79.1646237226.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Konovalov 2022-03-24 18:13:09 -07:00 committed by Linus Torvalds
parent c068664c97
commit 865bfa28ed
1 changed files with 41 additions and 41 deletions
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82
mm/kasan/report.c
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@ -84,24 +84,29 @@ static int __init kasan_set_multi_shot(char *str)
}
__setup("kasan_multi_shot", kasan_set_multi_shot);
static void print_error_description(struct kasan_report_info *info)
/*
* Used to suppress reports within kasan_disable/enable_current() critical
* sections, which are used for marking accesses to slab metadata.
*/
static bool report_suppressed(void)
{
if (info->type == KASAN_REPORT_INVALID_FREE) {
pr_err("BUG: KASAN: double-free or invalid-free in %pS\n",
(void *)info->ip);
return;
}
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
if (current->kasan_depth)
return true;
#endif
return false;
}
pr_err("BUG: KASAN: %s in %pS\n",
kasan_get_bug_type(info), (void *)info->ip);
if (info->access_size)
pr_err("%s of size %zu at addr %px by task %s/%d\n",
info->is_write ? "Write" : "Read", info->access_size,
info->access_addr, current->comm, task_pid_nr(current));
else
pr_err("%s at addr %px by task %s/%d\n",
info->is_write ? "Write" : "Read",
info->access_addr, current->comm, task_pid_nr(current));
/*
* Used to avoid reporting more than one KASAN bug unless kasan_multi_shot
* is enabled. Note that KASAN tests effectively enable kasan_multi_shot
* for their duration.
*/
static bool report_enabled(void)
{
if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
return true;
return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
}
#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
@ -160,6 +165,26 @@ static void end_report(unsigned long *flags, void *addr)
kasan_enable_current();
}
static void print_error_description(struct kasan_report_info *info)
{
if (info->type == KASAN_REPORT_INVALID_FREE) {
pr_err("BUG: KASAN: double-free or invalid-free in %pS\n",
(void *)info->ip);
return;
}
pr_err("BUG: KASAN: %s in %pS\n",
kasan_get_bug_type(info), (void *)info->ip);
if (info->access_size)
pr_err("%s of size %zu at addr %px by task %s/%d\n",
info->is_write ? "Write" : "Read", info->access_size,
info->access_addr, current->comm, task_pid_nr(current));
else
pr_err("%s at addr %px by task %s/%d\n",
info->is_write ? "Write" : "Read",
info->access_addr, current->comm, task_pid_nr(current));
}
static void print_track(struct kasan_track *track, const char *prefix)
{
pr_err("%s by task %u:\n", prefix, track->pid);
@ -381,31 +406,6 @@ static void print_memory_metadata(const void *addr)
}
}
/*
* Used to suppress reports within kasan_disable/enable_current() critical
* sections, which are used for marking accesses to slab metadata.
*/
static bool report_suppressed(void)
{
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
if (current->kasan_depth)
return true;
#endif
return false;
}
/*
* Used to avoid reporting more than one KASAN bug unless kasan_multi_shot
* is enabled. Note that KASAN tests effectively enable kasan_multi_shot
* for their duration.
*/
static bool report_enabled(void)
{
if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
return true;
return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
}
static void print_report(struct kasan_report_info *info)
{
void *tagged_addr = info->access_addr;