Make it possible to trace KASAN error reporting. A good usecase is
watching for trace events from the userspace to detect and process memory
corruption reports from the kernel.
Link: https://lkml.kernel.org/r/20210121131915.1331302-4-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Suggested-by: Marco Elver <elver@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
#include <linux/module.h>
#include <linux/sched/task_stack.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/sched/task_stack.h>
#include <linux/uaccess.h>
+#include <trace/events/error_report.h>
#include <asm/sections.h>
#include <asm/sections.h>
pr_err("==================================================================\n");
}
pr_err("==================================================================\n");
}
-static void end_report(unsigned long *flags)
+static void end_report(unsigned long *flags, unsigned long addr)
+ trace_error_report_end(ERROR_DETECTOR_KASAN, addr);
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
print_address_description(object, tag);
pr_err("\n");
print_memory_metadata(object);
print_address_description(object, tag);
pr_err("\n");
print_memory_metadata(object);
+ end_report(&flags, (unsigned long)object);
}
static void __kasan_report(unsigned long addr, size_t size, bool is_write,
}
static void __kasan_report(unsigned long addr, size_t size, bool is_write,
+ end_report(&flags, addr);
}
bool kasan_report(unsigned long addr, size_t size, bool is_write,
}
bool kasan_report(unsigned long addr, size_t size, bool is_write,