The patch titled
scripts/mod/modpost.c: fix memory leak
has been added to the -mm tree. Its filename is
scripts-mod-modpostc-fix-memory-leak.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: scripts/mod/modpost.c: fix memory leak
From: Alexey Fomenko <ext-alexey.fomenko@xxxxxxxxx>
sec2annotation returns malloc'ed buffer directly to printf as an argument.
Free this buffer after printing.
Signed-off-by: Alexey Fomenko <ext-alexey.fomenko@xxxxxxxxx>
Cc: Trevor Keith <tsrk@xxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/mod/modpost.c | 54 +++++++++++++++++++++++++++++-----------
1 file changed, 40 insertions(+), 14 deletions(-)
diff -puN scripts/mod/modpost.c~scripts-mod-modpostc-fix-memory-leak scripts/mod/modpost.c
--- a/scripts/mod/modpost.c~scripts-mod-modpostc-fix-memory-leak
+++ a/scripts/mod/modpost.c
@@ -1258,6 +1258,8 @@ static void report_sec_mismatch(const ch
{
const char *from, *from_p;
const char *to, *to_p;
+ char *prl_from;
+ char *prl_to;
switch (from_is_func) {
case 0: from = "variable"; from_p = ""; break;
@@ -1281,16 +1283,21 @@ static void report_sec_mismatch(const ch
switch (mismatch->mismatch) {
case TEXT_TO_ANY_INIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The function %s%s() references\n"
"the %s %s%s%s.\n"
"This is often because %s lacks a %s\n"
"annotation or the annotation of %s is wrong.\n",
- sec2annotation(fromsec), fromsym,
- to, sec2annotation(tosec), tosym, to_p,
- fromsym, sec2annotation(tosec), tosym);
+ prl_from, fromsym,
+ to, prl_to, tosym, to_p,
+ fromsym, prl_to, tosym);
+ free(prl_from);
+ free(prl_to);
break;
case DATA_TO_ANY_INIT: {
+ prl_to = sec2annotation(tosec);
const char *const *s = mismatch->symbol_white_list;
fprintf(stderr,
"The variable %s references\n"
@@ -1298,20 +1305,24 @@ static void report_sec_mismatch(const ch
"If the reference is valid then annotate the\n"
"variable with __init* or __refdata (see linux/init.h) "
"or name the variable:\n",
- fromsym, to, sec2annotation(tosec), tosym, to_p);
+ fromsym, to, prl_to, tosym, to_p);
while (*s)
fprintf(stderr, "%s, ", *s++);
fprintf(stderr, "\n");
+ free(prl_to);
break;
}
case TEXT_TO_ANY_EXIT:
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The function %s() references a %s in an exit section.\n"
"Often the %s %s%s has valid usage outside the exit section\n"
"and the fix is to remove the %sannotation of %s.\n",
- fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
+ fromsym, to, to, tosym, to_p, prl_to, tosym);
+ free(prl_to);
break;
case DATA_TO_ANY_EXIT: {
+ prl_to = sec2annotation(tosec);
const char *const *s = mismatch->symbol_white_list;
fprintf(stderr,
"The variable %s references\n"
@@ -1319,24 +1330,31 @@ static void report_sec_mismatch(const ch
"If the reference is valid then annotate the\n"
"variable with __exit* (see linux/init.h) or "
"name the variable:\n",
- fromsym, to, sec2annotation(tosec), tosym, to_p);
+ fromsym, to, prl_to, tosym, to_p);
while (*s)
fprintf(stderr, "%s, ", *s++);
fprintf(stderr, "\n");
+ free(prl_to);
break;
}
case XXXINIT_TO_SOME_INIT:
case XXXEXIT_TO_SOME_EXIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The %s %s%s%s references\n"
"a %s %s%s%s.\n"
"If %s is only used by %s then\n"
"annotate %s with a matching annotation.\n",
- from, sec2annotation(fromsec), fromsym, from_p,
- to, sec2annotation(tosec), tosym, to_p,
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
tosym, fromsym, tosym);
+ free(prl_from);
+ free(prl_to);
break;
case ANY_INIT_TO_ANY_EXIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The %s %s%s%s references\n"
"a %s %s%s%s.\n"
@@ -1345,11 +1363,15 @@ static void report_sec_mismatch(const ch
"uses functionality in the exit path.\n"
"The fix is often to remove the %sannotation of\n"
"%s%s so it may be used outside an exit section.\n",
- from, sec2annotation(fromsec), fromsym, from_p,
- to, sec2annotation(tosec), tosym, to_p,
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
sec2annotation(tosec), tosym, to_p);
+ free(prl_from);
+ free(prl_to);
break;
case ANY_EXIT_TO_ANY_INIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The %s %s%s%s references\n"
"a %s %s%s%s.\n"
@@ -1358,16 +1380,20 @@ static void report_sec_mismatch(const ch
"uses functionality in the init path.\n"
"The fix is often to remove the %sannotation of\n"
"%s%s so it may be used outside an init section.\n",
- from, sec2annotation(fromsec), fromsym, from_p,
- to, sec2annotation(tosec), tosym, to_p,
- sec2annotation(tosec), tosym, to_p);
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
+ prl_to, tosym, to_p);
+ free(prl_from);
+ free(prl_to);
break;
case EXPORT_TO_INIT_EXIT:
+ prl_to = sec2annotation(tosec);
fprintf(stderr,
"The symbol %s is exported and annotated %s\n"
"Fix this by removing the %sannotation of %s "
"or drop the export.\n",
- tosym, sec2annotation(tosec), sec2annotation(tosec), tosym);
+ tosym, prl_to, prl_to, tosym);
+ free(prl_to);
break;
}
fprintf(stderr, "\n");
_
Patches currently in -mm which might be from ext-alexey.fomenko@xxxxxxxxx are
scripts-mod-modpostc-fix-memory-leak.patch
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