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Always check for usage underflow when removing a file in storage.c

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Part of #22424.
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teor 2017-05-28 22:12:09 +10:00
parent f6841ae263
commit 9e36b0beb9
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1 changed files with 3 additions and 1 deletions
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src/common/storagedir.c
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@ -425,7 +425,9 @@ storage_dir_remove_file(storage_dir_t *d,
} }
} }
if (unlink(ipath) == 0) { if (unlink(ipath) == 0) {
if (! BUG(d->usage < size)) {
d->usage -= size; d->usage -= size;
}
} else { } else {
log_warn(LD_FS, "Unable to unlink %s", escaped(path)); log_warn(LD_FS, "Unable to unlink %s", escaped(path));
tor_free(path); tor_free(path);