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uffd: handle xrealloc() failure

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In the case, that xrealloc() fails do not overwrite the original pointer
to be able to free the original pointer on exit.

Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber 2020-11-12 11:17:01 +00:00 • committed by Andrei Vagin
parent 56a70ff99b
commit 528ce25987
1 changed files with 4 additions and 2 deletions
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6
criu/uffd.c
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@ -1131,6 +1131,7 @@ out:
static int complete_forks(int epollfd, struct epoll_event **events, int *nr_fds)
{
struct lazy_pages_info *lpi, *n;
struct epoll_event *tmp;
if (list_empty(&pending_lpis))
return 1;
@ -1138,9 +1139,10 @@ static int complete_forks(int epollfd, struct epoll_event **events, int *nr_fds)
list_for_each_entry(lpi, &pending_lpis, l)
(*nr_fds)++;
*events = xrealloc(*events, sizeof(struct epoll_event) * (*nr_fds));
if (!*events)
tmp = xrealloc(*events, sizeof(struct epoll_event) * (*nr_fds));
if (!tmp)
return -1;
*events = tmp;
list_for_each_entry_safe(lpi, n, &pending_lpis, l) {
if (epoll_add_rfd(epollfd, &lpi->lpfd))