lobo/isync
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reject messages that grow too large due to conversion

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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.
This commit is contained in:
Oswald Buddenhagen 2021-11-24 17:51:06 +01:00
parent bc15e571b6
commit 92921b1d3b
1 changed files with 6 additions and 0 deletions
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6
src/sync.c
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@ -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; 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 ); char *out_buf = vars->data.data = nfmalloc( vars->data.len );
idx = 0; idx = 0;
if (vars->srec) { if (vars->srec) {