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pay: Fix use-after-free issue with routehints in shortlived payments

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This was triggered by having some part being started after the overall
command already gave up, cleaning up the `cmd` context from which the
routehints were allocated. The early exit of the command, as a result
from a terminal state does not guarantee that no later attempt will
try to find a route, especially if the attempt was started before we
knew that it is doomed.
This commit is contained in:
Christian Decker
2021-05-28 11:53:41 +02:00
committed by Rusty Russell
parent e619bf00fb
commit 05a3be15a3
1 changed files with 2 additions and 2 deletions
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4
plugins/pay.c
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@@ -2026,7 +2026,7 @@ static struct command_result *json_paymod(struct command *cmd,
if (!bolt12_has_prefix(b11str)) {
b11 =
bolt11_decode(cmd, b11str, plugin_feature_set(cmd->plugin),
bolt11_decode(p, b11str, plugin_feature_set(cmd->plugin),
NULL, chainparams, &b11_fail);
if (b11 == NULL)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
@@ -2054,7 +2054,7 @@ static struct command_result *json_paymod(struct command *cmd,
"Invalid bolt11:"
" sets feature var_onion with no secret");
} else {
b12 = invoice_decode(cmd, b11str, strlen(b11str),
b12 = invoice_decode(p, b11str, strlen(b11str),
plugin_feature_set(cmd->plugin),
chainparams, &b12_fail);
if (b12 == NULL)