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-rw-r--r--builtin.h2
-rw-r--r--builtin/blame.c9
-rw-r--r--builtin/cat-file.c2
-rw-r--r--builtin/diff.c8
-rw-r--r--combine-diff.c4
-rw-r--r--diff-lib.c20
-rw-r--r--diff-no-index.c4
-rw-r--r--diff.c16
-rw-r--r--diff.h5
-rw-r--r--diffcore-rename.c2
-rw-r--r--diffcore.h2
-rw-r--r--revision.c2
-rwxr-xr-xt/t4054-diff-bogus-tree.sh83
-rw-r--r--tree-diff.c8
14 files changed, 135 insertions, 32 deletions
diff --git a/builtin.h b/builtin.h
index 857b9c8aa8..47f540f37f 100644
--- a/builtin.h
+++ b/builtin.h
@@ -42,7 +42,7 @@ void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c);
extern int check_pager_config(const char *cmd);
-extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, char **buf, unsigned long *buf_size);
+extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, int sha1_valid, char **buf, unsigned long *buf_size);
extern int cmd_add(int argc, const char **argv, const char *prefix);
extern int cmd_annotate(int argc, const char **argv, const char *prefix);
diff --git a/builtin/blame.c b/builtin/blame.c
index 5a67c202f0..fac0e93e67 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -96,6 +96,7 @@ struct origin {
int textconv_object(const char *path,
unsigned mode,
const unsigned char *sha1,
+ int sha1_valid,
char **buf,
unsigned long *buf_size)
{
@@ -103,7 +104,7 @@ int textconv_object(const char *path,
struct userdiff_driver *textconv;
df = alloc_filespec(path);
- fill_filespec(df, sha1, mode);
+ fill_filespec(df, sha1, sha1_valid, mode);
textconv = get_textconv(df);
if (!textconv) {
free_filespec(df);
@@ -128,7 +129,7 @@ static void fill_origin_blob(struct diff_options *opt,
num_read_blob++;
if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
- textconv_object(o->path, o->mode, o->blob_sha1, &file->ptr, &file_size))
+ textconv_object(o->path, o->mode, o->blob_sha1, 1, &file->ptr, &file_size))
;
else
file->ptr = read_sha1_file(o->blob_sha1, &type, &file_size);
@@ -2114,7 +2115,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
switch (st.st_mode & S_IFMT) {
case S_IFREG:
if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
- textconv_object(read_from, mode, null_sha1, &buf_ptr, &buf_len))
+ textconv_object(read_from, mode, null_sha1, 0, &buf_ptr, &buf_len))
strbuf_attach(&buf, buf_ptr, buf_len, buf_len + 1);
else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
die_errno("cannot open or read '%s'", read_from);
@@ -2506,7 +2507,7 @@ parse_done:
die("no such path %s in %s", path, final_commit_name);
if (DIFF_OPT_TST(&sb.revs->diffopt, ALLOW_TEXTCONV) &&
- textconv_object(path, o->mode, o->blob_sha1, (char **) &sb.final_buf,
+ textconv_object(path, o->mode, o->blob_sha1, 1, (char **) &sb.final_buf,
&sb.final_buf_size))
;
else
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 07bd984084..72205faeaf 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -143,7 +143,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
die("git cat-file --textconv %s: <object> must be <sha1:path>",
obj_name);
- if (!textconv_object(obj_context.path, obj_context.mode, sha1, &buf, &size))
+ if (!textconv_object(obj_context.path, obj_context.mode, sha1, 1, &buf, &size))
die("git cat-file --textconv: unable to run textconv on %s",
obj_name);
break;
diff --git a/builtin/diff.c b/builtin/diff.c
index 387afa7568..ac2b1cc63f 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -29,6 +29,8 @@ static void stuff_change(struct diff_options *opt,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
+ int old_sha1_valid,
+ int new_sha1_valid,
const char *old_name,
const char *new_name)
{
@@ -54,8 +56,8 @@ static void stuff_change(struct diff_options *opt,
one = alloc_filespec(old_name);
two = alloc_filespec(new_name);
- fill_filespec(one, old_sha1, old_mode);
- fill_filespec(two, new_sha1, new_mode);
+ fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+ fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
diff_queue(&diff_queued_diff, one, two);
}
@@ -84,6 +86,7 @@ static int builtin_diff_b_f(struct rev_info *revs,
stuff_change(&revs->diffopt,
blob[0].mode, canon_mode(st.st_mode),
blob[0].sha1, null_sha1,
+ 1, 0,
path, path);
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
@@ -108,6 +111,7 @@ static int builtin_diff_blobs(struct rev_info *revs,
stuff_change(&revs->diffopt,
blob[0].mode, blob[1].mode,
blob[0].sha1, blob[1].sha1,
+ 1, 1,
blob[0].name, blob[1].name);
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
diff --git a/combine-diff.c b/combine-diff.c
index a2e8dcf855..e9abdbd0b9 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -111,7 +111,7 @@ static char *grab_blob(const unsigned char *sha1, unsigned int mode,
return xcalloc(1, 1);
} else if (textconv) {
struct diff_filespec *df = alloc_filespec(path);
- fill_filespec(df, sha1, mode);
+ fill_filespec(df, sha1, 1, mode);
*size = fill_textconv(textconv, df, &blob);
free_filespec(df);
} else {
@@ -823,7 +823,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
&result_size, NULL, NULL);
} else if (textconv) {
struct diff_filespec *df = alloc_filespec(elem->path);
- fill_filespec(df, null_sha1, st.st_mode);
+ fill_filespec(df, null_sha1, 0, st.st_mode);
result_size = fill_textconv(textconv, df, &result);
free_filespec(df);
} else if (0 <= (fd = open(elem->path, O_RDONLY))) {
diff --git a/diff-lib.c b/diff-lib.c
index fc0dff31b5..f35de0ffa0 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -206,7 +206,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
if (silent_on_removed)
continue;
diff_addremove(&revs->diffopt, '-', ce->ce_mode,
- ce->sha1, ce->name, 0);
+ ce->sha1, !is_null_sha1(ce->sha1),
+ ce->name, 0);
continue;
}
changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
@@ -220,6 +221,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
newmode = ce_mode_from_stat(ce, st.st_mode);
diff_change(&revs->diffopt, oldmode, newmode,
ce->sha1, (changed ? null_sha1 : ce->sha1),
+ !is_null_sha1(ce->sha1), (changed ? 0 : !is_null_sha1(ce->sha1)),
ce->name, 0, dirty_submodule);
}
@@ -236,11 +238,12 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
static void diff_index_show_file(struct rev_info *revs,
const char *prefix,
struct cache_entry *ce,
- const unsigned char *sha1, unsigned int mode,
+ const unsigned char *sha1, int sha1_valid,
+ unsigned int mode,
unsigned dirty_submodule)
{
diff_addremove(&revs->diffopt, prefix[0], mode,
- sha1, ce->name, dirty_submodule);
+ sha1, sha1_valid, ce->name, dirty_submodule);
}
static int get_stat_data(struct cache_entry *ce,
@@ -295,7 +298,7 @@ static void show_new_file(struct rev_info *revs,
&dirty_submodule, &revs->diffopt) < 0)
return;
- diff_index_show_file(revs, "+", new, sha1, mode, dirty_submodule);
+ diff_index_show_file(revs, "+", new, sha1, !is_null_sha1(sha1), mode, dirty_submodule);
}
static int show_modified(struct rev_info *revs,
@@ -312,7 +315,7 @@ static int show_modified(struct rev_info *revs,
&dirty_submodule, &revs->diffopt) < 0) {
if (report_missing)
diff_index_show_file(revs, "-", old,
- old->sha1, old->ce_mode, 0);
+ old->sha1, 1, old->ce_mode, 0);
return -1;
}
@@ -347,7 +350,8 @@ static int show_modified(struct rev_info *revs,
return 0;
diff_change(&revs->diffopt, oldmode, mode,
- old->sha1, sha1, old->name, 0, dirty_submodule);
+ old->sha1, sha1, 1, !is_null_sha1(sha1),
+ old->name, 0, dirty_submodule);
return 0;
}
@@ -380,7 +384,7 @@ static void do_oneway_diff(struct unpack_trees_options *o,
struct diff_filepair *pair;
pair = diff_unmerge(&revs->diffopt, idx->name);
if (tree)
- fill_filespec(pair->one, tree->sha1, tree->ce_mode);
+ fill_filespec(pair->one, tree->sha1, 1, tree->ce_mode);
return;
}
@@ -396,7 +400,7 @@ static void do_oneway_diff(struct unpack_trees_options *o,
* Something removed from the tree?
*/
if (!idx) {
- diff_index_show_file(revs, "-", tree, tree->sha1, tree->ce_mode, 0);
+ diff_index_show_file(revs, "-", tree, tree->sha1, 1, tree->ce_mode, 0);
return;
}
diff --git a/diff-no-index.c b/diff-no-index.c
index 3a36144687..6568eea6f4 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -141,8 +141,8 @@ static int queue_diff(struct diff_options *o,
name2 = "/dev/null";
d1 = alloc_filespec(name1);
d2 = alloc_filespec(name2);
- fill_filespec(d1, null_sha1, mode1);
- fill_filespec(d2, null_sha1, mode2);
+ fill_filespec(d1, null_sha1, 0, mode1);
+ fill_filespec(d2, null_sha1, 0, mode2);
diff_queue(&diff_queued_diff, d1, d2);
return 0;
diff --git a/diff.c b/diff.c
index 5388ded214..8933dd1996 100644
--- a/diff.c
+++ b/diff.c
@@ -2443,12 +2443,12 @@ void free_filespec(struct diff_filespec *spec)
}
void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
- unsigned short mode)
+ int sha1_valid, unsigned short mode)
{
if (mode) {
spec->mode = canon_mode(mode);
hashcpy(spec->sha1, sha1);
- spec->sha1_valid = !is_null_sha1(sha1);
+ spec->sha1_valid = sha1_valid;
}
}
@@ -4589,6 +4589,7 @@ static int is_submodule_ignored(const char *path, struct diff_options *options)
void diff_addremove(struct diff_options *options,
int addremove, unsigned mode,
const unsigned char *sha1,
+ int sha1_valid,
const char *concatpath, unsigned dirty_submodule)
{
struct diff_filespec *one, *two;
@@ -4620,9 +4621,9 @@ void diff_addremove(struct diff_options *options,
two = alloc_filespec(concatpath);
if (addremove != '+')
- fill_filespec(one, sha1, mode);
+ fill_filespec(one, sha1, sha1_valid, mode);
if (addremove != '-') {
- fill_filespec(two, sha1, mode);
+ fill_filespec(two, sha1, sha1_valid, mode);
two->dirty_submodule = dirty_submodule;
}
@@ -4635,6 +4636,7 @@ void diff_change(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
+ int old_sha1_valid, int new_sha1_valid,
const char *concatpath,
unsigned old_dirty_submodule, unsigned new_dirty_submodule)
{
@@ -4649,6 +4651,8 @@ void diff_change(struct diff_options *options,
const unsigned char *tmp_c;
tmp = old_mode; old_mode = new_mode; new_mode = tmp;
tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c;
+ tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid;
+ new_sha1_valid = tmp;
tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule;
new_dirty_submodule = tmp;
}
@@ -4659,8 +4663,8 @@ void diff_change(struct diff_options *options,
one = alloc_filespec(concatpath);
two = alloc_filespec(concatpath);
- fill_filespec(one, old_sha1, old_mode);
- fill_filespec(two, new_sha1, new_mode);
+ fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+ fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
one->dirty_submodule = old_dirty_submodule;
two->dirty_submodule = new_dirty_submodule;
diff --git a/diff.h b/diff.h
index 7af5f1e2a7..b5ba1402aa 100644
--- a/diff.h
+++ b/diff.h
@@ -19,12 +19,14 @@ typedef void (*change_fn_t)(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
+ int old_sha1_valid, int new_sha1_valid,
const char *fullpath,
unsigned old_dirty_submodule, unsigned new_dirty_submodule);
typedef void (*add_remove_fn_t)(struct diff_options *options,
int addremove, unsigned mode,
const unsigned char *sha1,
+ int sha1_valid,
const char *fullpath, unsigned dirty_submodule);
typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
@@ -209,12 +211,15 @@ extern void diff_addremove(struct diff_options *,
int addremove,
unsigned mode,
const unsigned char *sha1,
+ int sha1_valid,
const char *fullpath, unsigned dirty_submodule);
extern void diff_change(struct diff_options *,
unsigned mode1, unsigned mode2,
const unsigned char *sha1,
const unsigned char *sha2,
+ int sha1_valid,
+ int sha2_valid,
const char *fullpath,
unsigned dirty_submodule1, unsigned dirty_submodule2);
diff --git a/diffcore-rename.c b/diffcore-rename.c
index f639601c76..e6f9be64cf 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -48,7 +48,7 @@ static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
memmove(rename_dst + first + 1, rename_dst + first,
(rename_dst_nr - first - 1) * sizeof(*rename_dst));
rename_dst[first].two = alloc_filespec(two->path);
- fill_filespec(rename_dst[first].two, two->sha1, two->mode);
+ fill_filespec(rename_dst[first].two, two->sha1, two->sha1_valid, two->mode);
rename_dst[first].pair = NULL;
return &(rename_dst[first]);
}
diff --git a/diffcore.h b/diffcore.h
index 8f32b824cd..c964ec114a 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -54,7 +54,7 @@ struct diff_filespec {
extern struct diff_filespec *alloc_filespec(const char *);
extern void free_filespec(struct diff_filespec *);
extern void fill_filespec(struct diff_filespec *, const unsigned char *,
- unsigned short);
+ int, unsigned short);
extern int diff_populate_filespec(struct diff_filespec *, int);
extern void diff_free_filespec_data(struct diff_filespec *);
diff --git a/revision.c b/revision.c
index 18be62b316..21ef729cfa 100644
--- a/revision.c
+++ b/revision.c
@@ -332,6 +332,7 @@ static int tree_difference = REV_TREE_SAME;
static void file_add_remove(struct diff_options *options,
int addremove, unsigned mode,
const unsigned char *sha1,
+ int sha1_valid,
const char *fullpath, unsigned dirty_submodule)
{
int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD;
@@ -345,6 +346,7 @@ static void file_change(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
+ int old_sha1_valid, int new_sha1_valid,
const char *fullpath,
unsigned old_dirty_submodule, unsigned new_dirty_submodule)
{
diff --git a/t/t4054-diff-bogus-tree.sh b/t/t4054-diff-bogus-tree.sh
new file mode 100755
index 0000000000..0843c87890
--- /dev/null
+++ b/t/t4054-diff-bogus-tree.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+test_description='test diff with a bogus tree containing the null sha1'
+. ./test-lib.sh
+
+empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+
+test_expect_success 'create bogus tree' '
+ bogus_tree=$(
+ printf "100644 fooQQQQQQQQQQQQQQQQQQQQQ" |
+ q_to_nul |
+ git hash-object -w --stdin -t tree
+ )
+'
+
+test_expect_success 'create tree with matching file' '
+ echo bar >foo &&
+ git add foo &&
+ good_tree=$(git write-tree)
+ blob=$(git rev-parse :foo)
+'
+
+test_expect_success 'raw diff shows null sha1 (addition)' '
+ echo ":000000 100644 $_z40 $_z40 A foo" >expect &&
+ git diff-tree $empty_tree $bogus_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (removal)' '
+ echo ":100644 000000 $_z40 $_z40 D foo" >expect &&
+ git diff-tree $bogus_tree $empty_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (modification)' '
+ echo ":100644 100644 $blob $_z40 M foo" >expect &&
+ git diff-tree $good_tree $bogus_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (other direction)' '
+ echo ":100644 100644 $_z40 $blob M foo" >expect &&
+ git diff-tree $bogus_tree $good_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (reverse)' '
+ echo ":100644 100644 $_z40 $blob M foo" >expect &&
+ git diff-tree -R $good_tree $bogus_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (index)' '
+ echo ":100644 100644 $_z40 $blob M foo" >expect &&
+ git diff-index $bogus_tree >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'patch fails due to bogus sha1 (addition)' '
+ test_must_fail git diff-tree -p $empty_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (removal)' '
+ test_must_fail git diff-tree -p $bogus_tree $empty_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (modification)' '
+ test_must_fail git diff-tree -p $good_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (other direction)' '
+ test_must_fail git diff-tree -p $bogus_tree $good_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (reverse)' '
+ test_must_fail git diff-tree -R -p $good_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (index)' '
+ test_must_fail git diff-index -p $bogus_tree
+'
+
+test_done
diff --git a/tree-diff.c b/tree-diff.c
index 28ad6db9ff..7e5483366e 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -49,12 +49,12 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2,
if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode1)) {
if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
opt->change(opt, mode1, mode2,
- sha1, sha2, base->buf, 0, 0);
+ sha1, sha2, 1, 1, base->buf, 0, 0);
}
strbuf_addch(base, '/');
diff_tree_sha1(sha1, sha2, base->buf, opt);
} else {
- opt->change(opt, mode1, mode2, sha1, sha2, base->buf, 0, 0);
+ opt->change(opt, mode1, mode2, sha1, sha2, 1, 1, base->buf, 0, 0);
}
strbuf_setlen(base, old_baselen);
return 0;
@@ -100,7 +100,7 @@ static void show_entry(struct diff_options *opt, const char *prefix,
die("corrupt tree sha %s", sha1_to_hex(sha1));
if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE))
- opt->add_remove(opt, *prefix, mode, sha1, base->buf, 0);
+ opt->add_remove(opt, *prefix, mode, sha1, 1, base->buf, 0);
strbuf_addch(base, '/');
@@ -108,7 +108,7 @@ static void show_entry(struct diff_options *opt, const char *prefix,
show_tree(opt, prefix, &inner, base);
free(tree);
} else
- opt->add_remove(opt, prefix[0], mode, sha1, base->buf, 0);
+ opt->add_remove(opt, prefix[0], mode, sha1, 1, base->buf, 0);
strbuf_setlen(base, old_baselen);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 00:11:53 +0000