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Fix use after free in transaction code 

If we set an instruction as ready twice, it decreases the transaction's
num_waiting a second time and applies the transaction earlier than it
should. This no doubt has undesired effects, probably resulting in a use
after free.

Hopefully fixes the first part of #2207.
This commit is contained in:
Ryan Dwyer 2018-07-04 22:58:17 +10:00
parent f414885b1d
commit 50b401677b
1 changed files with 3 additions and 1 deletions
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4
sway/desktop/transaction.c
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@ -377,7 +377,9 @@ static void set_instructions_ready(struct sway_view *view, int index) {
for (int i = 0; i <= index; ++i) {
struct sway_transaction_instruction *instruction =
view->swayc->instructions->items[i];
set_instruction_ready(instruction);
if (!instruction->ready) {
set_instruction_ready(instruction);
}
}
}