diff --git a/extract.c b/extract.c
index a0a4929..9ef80b3 100644
--- a/extract.c
+++ b/extract.c
@@ -2214,6 +2214,7 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
     ulg eb_ucsize;
     uch *eb_ucptr;
     int r;
+    ush method;
 
     if (compr_offset < 4)                /* field is not compressed: */
         return PK_OK;                    /* do nothing and signal OK */
@@ -2223,6 +2224,12 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
          eb_size <= (compr_offset + EB_CMPRHEADLEN)))
         return IZ_EF_TRUNC;               /* no compressed data! */
 
+    method = makeword(eb + (EB_HEADSIZE + compr_offset));
+    if ((method == STORED) && (eb_size != compr_offset + EB_CMPRHEADLEN + eb_ucsize))
+        return PK_ERR;            /* compressed & uncompressed
+                                   * should match in STORED
+                                   * method */
+
     if (
 #ifdef INT_16BIT
         (((ulg)(extent)eb_ucsize) != eb_ucsize) ||
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<div class='path'>path: <a href='/guix/log/?id=4f3e5548fcc2c0bbd9a5ecaf76a4fc63d2439aa3'>root</a>/<a href='/guix/log/gnu?id=4f3e5548fcc2c0bbd9a5ecaf76a4fc63d2439aa3'>gnu</a>/<a href='/guix/log/gnu/packages.scm?id=4f3e5548fcc2c0bbd9a5ecaf76a4fc63d2439aa3'>packages.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages.scm?id=4f3e5548fcc2c0bbd9a5ecaf76a4fc63d2439aa3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-25 18:14:42 +0100'>2023-01-25</span></td><td><a href='/guix/commit/gnu/packages.scm?id=8b2721de6af76780611fe9f86fa5d4cd062400d1'>packages: Adjust 'generate-package-cache' for Guile 3.0.9.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (generate-package-cache): Adjust for Guile 3.0.9.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-06-06 22:43:30 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages.scm?id=635d49f97ee233bbb2673f97d7556c3c91b55889'>packages: Use SRFI-71 instead of SRFI-11.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (%package-module-path): Use 'let*' instead of
'let*-values'.
(specification-&gt;package, specification-&gt;location)
(specification-&gt;package+output): Use 'let' instead of 'let-values'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-06-06 22:43:30 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages.scm?id=7041fe0646a9603e7d1d6bde139a284146515917'>packages: Add 'specifications-&gt;packages'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (specifications-&gt;packages): New procedure.
* guix/scripts/home/import.scm (manifest+configuration-files-&gt;code): Use it.
* tests/home-import.scm (match-home-environment-no-services)
(match-home-environment-no-services-nor-packages)
(match-home-environment-bash-service)
(match-home-environment-bash-service-with-alias): Adjust 'packages'
field accordingly.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Antero Mejr</td></tr>
<tr><td><span title='2022-04-04 22:58:03 +0200'>2022-04-04</span></td><td><a href='/guix/commit/gnu/packages.scm?id=f54f2aa9df5047b348ca104f5145af50c1a482f6'>packages: Add 'package-unique-version-prefix'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (package-unique-version-prefix): New procedure.
* guix/scripts/package.scm (manifest-entry-version-prefix): Use it.
* tests/packages.scm ("package-unique-version-prefix, gcc@8")
("package-unique-version-prefix, grep"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-11 20:34:59 +0100'>2022-01-11</span></td><td><a href='/guix/commit/gnu/packages.scm?id=0552dcb294bbfed76d7a495f5e368c53f20b852a'>shell: Cache profiles even when using package specs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This enables profile caching not just when '-m' or '-f' is used, but
also when package specs are passed on the command line, as in:

  guix shell -D guix git

It also changes profile cache keys to include the system type, which was
previously ignored.

* guix/scripts/shell.scm (options-with-caching)[single-file-for-caching]:
Remove.
Call 'profile-cached-gc-root' instead; adjust to accept two values.
(profile-cache-primary-key): New procedure.
(profile-cache-key): Remove.
(profile-file-cache-key, profile-spec-cache-key): New procedures.
(profile-cached-gc-root): Rewrite to include functionality formally in
'single-file-for-caching', but extend to handle package specs.
* gnu/packages.scm (cache-is-authoritative?): Export.
* guix/transformations.scm (transformation-option-key?): New procedure.
* doc/guix.texi (Invoking guix shell): Move '--rebuild-cache'
documentation to the bottom, just above '--root'.  Explain caching and
how these two options relate to that.
</span></span></td><td>Ludovic Courtès</td></tr>