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vcs-svn: verify that deltas consume all inline data

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By constraining the format of deltas, we can more easily detect
corruption and other breakage.

Requiring deltas not to provide unconsumed data also opens the
possibility of ignoring the declared amount of novel data and simply
streaming the data as needed to fulfill copyfrom_data requests.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Ramkumar Ramachandra <artagnon@gmail.com>
This commit is contained in:
Jonathan Nieder 2010-10-13 04:48:07 -05:00
parent ec71aa2e1f
commit 4c9b93ed76
2 changed files with 4 additions and 3 deletions
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5
t/t9011-svn-da.sh
View file

@ -121,11 +121,10 @@ test_expect_success 'preimage view: reject truncated preimage' '
test_must_fail test-svn-fe -d preimage clear.longread 9
'
test_expect_success 'inline data' '
test_expect_success 'forbid unconsumed inline data' '
printf "SVNQ%b%s%b%s" "QQQQ\003" "bar" "QQQQ\001" "x" |
q_to_nul >inline.clear &&
test-svn-fe -d preimage inline.clear 18 >actual &&
test_cmp empty actual
test_must_fail test-svn-fe -d preimage inline.clear 18 >actual
'
test_expect_success 'reject truncated inline data' '

2
vcs-svn/svndiff.c
View file

@ -208,6 +208,8 @@ static int apply_window_in_core(struct window *ctx)
)
if (execute_one_instruction(ctx, &instructions, &data_pos))
return -1;
if (data_pos != ctx->data.len)
return error("invalid delta: does not copy all inline data");
return 0;
}