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pretty: handle broken commit headers gracefully

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Centralize the parsing of the date and time zone strings in the new
helper function show_ident_date() and make sure it checks the pointers
provided by split_ident_line() for NULL before use.

Reported-by: Ivan Lyapunov <dront78@gmail.com>
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2013-04-17 20:33:35 +02:00 committed by Junio C Hamano
parent 9cfa5126a0
commit 9dbe7c3d7f
2 changed files with 66 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
pretty.c
View File

@ -393,6 +393,19 @@ static void add_rfc2047(struct strbuf *sb, const char *line, size_t len,
strbuf_addstr(sb, "?=");
}
static const char *show_ident_date(const struct ident_split *ident,
enum date_mode mode)
{
unsigned long date = 0;
int tz = 0;
if (ident->date_begin && ident->date_end)
date = strtoul(ident->date_begin, NULL, 10);
if (ident->tz_begin && ident->tz_end)
tz = strtol(ident->tz_begin, NULL, 10);
return show_date(date, tz, mode);
}
void pp_user_info(const struct pretty_print_context *pp,
const char *what, struct strbuf *sb,
const char *line, const char *encoding)
@ -401,12 +414,10 @@ void pp_user_info(const struct pretty_print_context *pp,
struct strbuf mail;
struct ident_split ident;
int linelen;
char *line_end, *date;
char *line_end;
const char *mailbuf, *namebuf;
size_t namelen, maillen;
int max_length = 78; /* per rfc2822 */
unsigned long time;
int tz;
if (pp->fmt == CMIT_FMT_ONELINE)
return;
@ -438,8 +449,6 @@ void pp_user_info(const struct pretty_print_context *pp,
strbuf_add(&name, namebuf, namelen);
namelen = name.len + mail.len + 3; /* ' ' + '<' + '>' */
time = strtoul(ident.date_begin, &date, 10);
tz = strtol(date, NULL, 10);
if (pp->fmt == CMIT_FMT_EMAIL) {
strbuf_addstr(sb, "From: ");
@ -472,13 +481,16 @@ void pp_user_info(const struct pretty_print_context *pp,
switch (pp->fmt) {
case CMIT_FMT_MEDIUM:
strbuf_addf(sb, "Date: %s\n", show_date(time, tz, pp->date_mode));
strbuf_addf(sb, "Date: %s\n",
show_ident_date(&ident, pp->date_mode));
break;
case CMIT_FMT_EMAIL:
strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
strbuf_addf(sb, "Date: %s\n",
show_ident_date(&ident, DATE_RFC2822));
break;
case CMIT_FMT_FULLER:
strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, pp->date_mode));
strbuf_addf(sb, "%sDate: %s\n", what,
show_ident_date(&ident, pp->date_mode));
break;
default:
/* notin' */
@ -688,8 +700,6 @@ static size_t format_person_part(struct strbuf *sb, char part,
{
/* currently all placeholders have same length */
const int placeholder_len = 2;
int tz;
unsigned long date = 0;
struct ident_split s;
const char *name, *mail;
size_t maillen, namelen;
@ -716,30 +726,23 @@ static size_t format_person_part(struct strbuf *sb, char part,
if (!s.date_begin)
goto skip;
date = strtoul(s.date_begin, NULL, 10);
if (part == 't') { /* date, UNIX timestamp */
strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
return placeholder_len;
}
/* parse tz */
tz = strtoul(s.tz_begin + 1, NULL, 10);
if (*s.tz_begin == '-')
tz = -tz;
switch (part) {
case 'd': /* date */
strbuf_addstr(sb, show_date(date, tz, dmode));
strbuf_addstr(sb, show_ident_date(&s, dmode));
return placeholder_len;
case 'D': /* date, RFC2822 style */
strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
strbuf_addstr(sb, show_ident_date(&s, DATE_RFC2822));
return placeholder_len;
case 'r': /* date, relative */
strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
strbuf_addstr(sb, show_ident_date(&s, DATE_RELATIVE));
return placeholder_len;
case 'i': /* date, ISO 8601 */
strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601));
return placeholder_len;
}

42
t/t4212-log-corrupt.sh Executable file
View File

@ -0,0 +1,42 @@
#!/bin/sh
test_description='git log with invalid commit headers'
. ./test-lib.sh
test_expect_success 'setup' '
test_commit foo &&
git cat-file commit HEAD |
sed "/^author /s/>/>-<>/" >broken_email.commit &&
git hash-object -w -t commit broken_email.commit >broken_email.hash &&
git update-ref refs/heads/broken_email $(cat broken_email.hash)
'
test_expect_success 'git log with broken author email' '
{
echo commit $(cat broken_email.hash)
echo "Author: A U Thor <author@example.com>"
echo "Date: Thu Jan 1 00:00:00 1970 +0000"
echo
echo " foo"
} >expect.out &&
: >expect.err &&
git log broken_email >actual.out 2>actual.err &&
test_cmp expect.out actual.out &&
test_cmp expect.err actual.err
'
test_expect_success 'git log --format with broken author email' '
echo "A U Thor+author@example.com+" >expect.out &&
: >expect.err &&
git log --format="%an+%ae+%ad" broken_email >actual.out 2>actual.err &&
test_cmp expect.out actual.out &&
test_cmp expect.err actual.err
'
test_done