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From a034f8a50cbe15d250457ed2eefbf9db059f724f Mon Sep 17 00:00:00 2001
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From: Eugene Syromyatnikov <evgsyr@gmail.com>
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Date: Wed, 18 Aug 2021 21:48:38 +0200
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Subject: [PATCH 147/150] filter_qualify: free allocated data on the error path
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exit of parse_poke_token
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While not terribly required due to the fact that issues with option
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parsing lead to program termination, these changes avoid leaking data
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allocated in the function's scope and not stored elsewhere, which might
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come handy if it ever be used dynamically during the runtime.
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This also has been reported as resource leaks by covscan, and these
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changes should calm it.
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* src/filter_qualify.c (parse_poke_token): Go to err label instead of
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returning right away; free poke->data, poke, and str_tokenized before
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returning false.
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References: https://bugzilla.redhat.com/show_bug.cgi?id=1995509
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---
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src/filter_qualify.c | 18 ++++++++++++------
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1 file changed, 12 insertions(+), 6 deletions(-)
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diff --git a/src/filter_qualify.c b/src/filter_qualify.c
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index df05496..a1a6471 100644
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--- a/src/filter_qualify.c
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+++ b/src/filter_qualify.c
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@@ -169,34 +169,40 @@ parse_poke_token(const char *input, struct inject_opts *fopts, bool isenter)
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poke->is_enter = isenter;
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if ((val = STR_STRIP_PREFIX(token, "@arg")) == token)
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- return false;
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+ goto err;
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if ((val[0] >= '1') && (val[0] <= '7')) {
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poke->arg_no = val[0] - '0';
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} else {
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- return false;
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+ goto err;
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}
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if (val[1] != '=')
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- return false;
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+ goto err;
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val += 2;
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data_len = strlen(val);
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if ((data_len == 0) || (data_len % 2) || (data_len > 2048))
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- return false;
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+ goto err;
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data_len /= 2;
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poke->data_len = data_len;
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poke->data = xmalloc(data_len);
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for (size_t i = 0; i < data_len; i++)
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if (sscanf(&val[2 * i], "%2hhx", &poke->data[i]) != 1)
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- return false;
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+ goto err;
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if (poke_add(fopts->data.poke_idx, poke))
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- return false;
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+ goto err;
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}
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free(str_tokenized);
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fopts->data.flags |= flag;
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return true;
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+
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+err:
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+ free(poke->data);
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+ free(poke);
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+ free(str_tokenized);
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+ return false;
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}
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static bool
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--
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2.1.4
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