From bd528f923482223649aa84be7d131e69356149da Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A1draig=20Brady?= Date: Sun, 4 Jan 2026 12:45:46 +0000 Subject: [PATCH] copy: fix possible infinite loop with SEEK_HOLE Commit v9.8-95-g4c0cf3864 intended to initialize ext_start to src_pos, as was described at: https://lists.gnu.org/r/coreutils/2025-11/msg00035.html However ipos was inadvertently used, which is only valid the first time through the loop. * src/copy-file-data.c (lseek_copy): Use scan_inference->hole_start only with the initial offset passed to lseek_copy(). Reported at https://github.com/coreutils/coreutils/issues/159 --- a/src/copy-file-data.c +++ b/src/copy-file-data.c @@ -338,7 +338,7 @@ lseek_copy (int src_fd, int dest_fd, cha for (off_t ext_start = scan_inference->ext_start; 0 <= ext_start && ext_start < max_ipos; ) { - off_t ext_end = (ext_start == ipos + off_t ext_end = (ext_start == src_pos ? scan_inference->hole_start : lseek (src_fd, ext_start, SEEK_HOLE)); if (0 <= ext_end)