From: Ævar Arnfjörð Bjarmason Date: Tue, 2 Aug 2022 15:33:13 +0000 (+0200) Subject: log: fix a memory leak in "git show ..." X-Git-Tag: v2.38.0-rc0~82^2~3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=055e57b7b2183cd5ae7ce8af0becd20623b3db71;p=thirdparty%2Fgit.git log: fix a memory leak in "git show ..." Fix a memory leak in code added in 5d7eeee2ac6 (git-show: grok blobs, trees and tags, too, 2006-12-14). As we iterate over a "..." command-line and encounter ad OBJ_COMMIT we want to use our "struct rev_info", but with a "pending" array of one element: the one commit we're showing in the loop. To do this 5d7eeee2ac6 saved away a pointer to rev.pending.objects and rev.pending.nr for its iteration. We'd then clobber those (and alloc) when we needed to show an OBJ_COMMIT. We'd therefore leak the "rev.pending" we started out with, and only free the new "rev.pending" in the "OBJ_COMMIT" case arm as prepare_revision_walk() would draw it down. Let's fix this memory leak. Now when we encounter an OBJ_COMMIT we save away the "rev.pending" before clearing it. We then add a single commit to it, which our indirect invocation of prepare_revision_walk() will remove. After that we restore the "rev.pending". Our "rev.pending" will then get free'd by the release_revisions() added in f6bfea0ad01 (revisions API users: use release_revisions() in builtin/log.c, 2022-04-13) Signed-off-by: Ævar Arnfjörð Bjarmason Signed-off-by: Junio C Hamano --- diff --git a/builtin/log.c b/builtin/log.c index 88a5e98875..b4b1d97461 100644 --- a/builtin/log.c +++ b/builtin/log.c @@ -743,11 +743,17 @@ int cmd_show(int argc, const char **argv, const char *prefix) rev.shown_one = 1; break; case OBJ_COMMIT: + { + struct object_array old; + + memcpy(&old, &rev.pending, sizeof(old)); rev.pending.nr = rev.pending.alloc = 0; rev.pending.objects = NULL; add_object_array(o, name, &rev.pending); ret = cmd_log_walk_no_free(&rev); + memcpy(&rev.pending, &old, sizeof(rev.pending)); break; + } default: ret = error(_("unknown type: %d"), o->type); } diff --git a/t/t0203-gettext-setlocale-sanity.sh b/t/t0203-gettext-setlocale-sanity.sh index 0ce1f22eff..86cff324ff 100755 --- a/t/t0203-gettext-setlocale-sanity.sh +++ b/t/t0203-gettext-setlocale-sanity.sh @@ -5,6 +5,7 @@ test_description="The Git C functions aren't broken by setlocale(3)" +TEST_PASSES_SANITIZE_LEAK=true . ./lib-gettext.sh test_expect_success 'git show a ISO-8859-1 commit under C locale' ' diff --git a/t/t1020-subdirectory.sh b/t/t1020-subdirectory.sh index 9fdbb2af80..45eef9457f 100755 --- a/t/t1020-subdirectory.sh +++ b/t/t1020-subdirectory.sh @@ -6,6 +6,7 @@ test_description='Try various core-level commands in subdirectory. ' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-read-tree.sh diff --git a/t/t3307-notes-man.sh b/t/t3307-notes-man.sh index 1aa366a410..ae316502c4 100755 --- a/t/t3307-notes-man.sh +++ b/t/t3307-notes-man.sh @@ -4,6 +4,7 @@ test_description='Examples from the git-notes man page Make sure the manual is not full of lies.' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success 'setup' ' diff --git a/t/t3920-crlf-messages.sh b/t/t3920-crlf-messages.sh index 0276edbe3d..4c661d4d54 100755 --- a/t/t3920-crlf-messages.sh +++ b/t/t3920-crlf-messages.sh @@ -1,6 +1,8 @@ #!/bin/sh test_description='Test ref-filter and pretty APIs for commit and tag messages using CRLF' + +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh LIB_CRLF_BRANCHES="" diff --git a/t/t4069-remerge-diff.sh b/t/t4069-remerge-diff.sh index 35f94957fc..9e7cac68b1 100755 --- a/t/t4069-remerge-diff.sh +++ b/t/t4069-remerge-diff.sh @@ -2,6 +2,7 @@ test_description='remerge-diff handling' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # This test is ort-specific diff --git a/t/t7007-show.sh b/t/t7007-show.sh index d6cc69e0f2..f908a4d1ab 100755 --- a/t/t7007-show.sh +++ b/t/t7007-show.sh @@ -2,6 +2,7 @@ test_description='git show' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success setup ' diff --git a/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh b/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh index ad1eb64ba0..aa004b70a8 100755 --- a/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh +++ b/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh @@ -5,6 +5,7 @@ test_description='pre-commit and pre-merge-commit hooks' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success 'root commit' ' diff --git a/t/t9122-git-svn-author.sh b/t/t9122-git-svn-author.sh index 527ba3d293..0fc289ae0f 100755 --- a/t/t9122-git-svn-author.sh +++ b/t/t9122-git-svn-author.sh @@ -2,7 +2,6 @@ test_description='git svn authorship' -TEST_FAILS_SANITIZE_LEAK=true . ./lib-git-svn.sh test_expect_success 'setup svn repository' ' diff --git a/t/t9162-git-svn-dcommit-interactive.sh b/t/t9162-git-svn-dcommit-interactive.sh index e2aa8ed88a..b3ce033a0d 100755 --- a/t/t9162-git-svn-dcommit-interactive.sh +++ b/t/t9162-git-svn-dcommit-interactive.sh @@ -4,7 +4,6 @@ test_description='git svn dcommit --interactive series' -TEST_FAILS_SANITIZE_LEAK=true . ./lib-git-svn.sh test_expect_success 'initialize repo' '