diff options
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index e78017a3e1bd..b54d252b398e 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -21,6 +21,7 @@ #include <linux/build_bug.h> #include <linux/clk.h> #include <linux/clk-provider.h> +#include <linux/errname.h> #include <linux/module.h> /* for KSYM_SYMBOL_LEN */ #include <linux/types.h> #include <linux/string.h> @@ -613,6 +614,25 @@ static char *string_nocheck(char *buf, char *end, const char *s, return widen_string(buf, len, end, spec); } +static char *err_ptr(char *buf, char *end, void *ptr, + struct printf_spec spec) +{ + int err = PTR_ERR(ptr); + const char *sym = errname(err); + + if (sym) + return string_nocheck(buf, end, sym, spec); + + /* + * Somebody passed ERR_PTR(-1234) or some other non-existing + * Efoo - or perhaps CONFIG_SYMBOLIC_ERRNAME=n. Fall back to + * printing it as its decimal representation. + */ + spec.flags |= SIGN; + spec.base = 10; + return number(buf, end, err, spec); +} + /* Be careful: error messages must fit into the given buffer. */ static char *error_string(char *buf, char *end, const char *s, struct printf_spec spec) @@ -2187,6 +2207,11 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, return kobject_string(buf, end, ptr, spec, fmt); case 'x': return pointer_string(buf, end, ptr, spec); + case 'e': + /* %pe with a non-ERR_PTR gets treated as plain %p */ + if (!IS_ERR(ptr)) + break; + return err_ptr(buf, end, ptr, spec); } /* default is to _not_ leak addresses, hash before printing */ @@ -2823,6 +2848,7 @@ int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) case 'f': case 'x': case 'K': + case 'e': save_arg(void *); break; default: @@ -2999,6 +3025,7 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) case 'f': case 'x': case 'K': + case 'e': process = true; break; default: |