commit b490237f809cf7593cfa7de0bbb48050e27993a6
from: Stefan Sperling <stsp@stsp.name>
via: Thomas Adam <thomas@xteddy.org>
date: Wed Jan 12 21:11:53 2022 UTC

fix file corruption regression in 'got checkout' caused by commit db696021

got-read-pack must rewind its files temporary files before reusing them.

Problem reported by naddy
ok tracey naddy

commit - 1944573a096bbe0d2b80dd1644f01383b9353af5
commit + b490237f809cf7593cfa7de0bbb48050e27993a6
blob - 42db173ef1b6dbec1e36f988932ceaaf62802922
blob + 69a1daf4a2c1047bb38b4801085ed055ac118786
--- lib/pack.c
+++ lib/pack.c
@@ -1119,6 +1119,11 @@ got_pack_dump_delta_chain_to_file(size_t *result_size,
 			return got_error_from_errno("malloc");
 		base_file = NULL;
 		accum_file = NULL;
+	} else {
+		if (fseeko(base_file, 0L, SEEK_SET) == -1)
+			return got_error_from_errno("fseeko");
+		if (fseeko(accum_file, 0L, SEEK_SET) == -1)
+			return got_error_from_errno("fseeko");
 	}
 
 	/* Deltas are ordered in ascending order. */