commit 92921b1d3b7262eaa0fbb095cc714098b431c2f9
Author: Oswald Buddenhagen <o...@users.sf.net>
Date: Wed Nov 24 17:51:06 2021 +0100
reject messages that grow too large due to conversion
that shouldn't really be a problem, as we have 2GB of headroom, and most
growth would happen when sending an all-newlines message from maildir to
imap (due to CR additions), which is mostly non-critical. but better
safe than sorry.
src/sync.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/sync.c b/src/sync.c
index 978521c..32d4fa1 100644
--- a/src/sync.c
+++ b/src/sync.c
@@ -494,6 +494,12 @@ copy_msg_convert( int in_cr, int out_cr, copy_vars_t
*vars, int t )
}
vars->data.len = in_len + extra;
+ if (vars->data.len > INT_MAX) {
+ warn( "Warning: message %u from %s is too big after conversion;
skipping.\n",
+ vars->msg->uid, str_fn[1-t] );
+ free( in_buf );
+ return 0;
+ }
char *out_buf = vars->data.data = nfmalloc( vars->data.len );
idx = 0;
if (vars->srec) {
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