modpost: Fix processing of CRCs on 32-bit build machines

modpost now reads CRCs from .*.cmd files, parsing them using strtol().
This is inconsistent with its parsing of Module.symvers and with their
definition as *unsigned* 32-bit values.

strtol() clamps values to [LONG_MIN, LONG_MAX], and when building on a
32-bit system this changes all CRCs >= 0x80000000 to be 0x7fffffff.

Change extract_crcs_for_object() to use strtoul() instead.

Cc: [email protected]
Fixes: f292d875d0dc ("modpost: extract symbol versions from *.cmd files")
Signed-off-by: Ben Hutchings <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index efff8078e39581349f72fd8fbe6e2c062e36d372..9466b6a2abae46c41ec1d4d4e06eb9001dc79608 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1733,7 +1733,7 @@ static void extract_crcs_for_object(const char *object, struct module *mod)
                if (!isdigit(*p))
                        continue;       /* skip this line */
 
-               crc = strtol(p, &p, 0);
+               crc = strtoul(p, &p, 0);
                if (*p != '\n')
                        continue;       /* skip this line */