Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
initramfs_test: kunit test for cpio.filesize > PATH_MAX
initramfs unpack skips over cpio entries where namesize > PATH_MAX,
instead of returning an error. Add coverage for this behaviour.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Link: https://patch.msgid.link/20260114135051.4943-2-ddiss@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
authored by
David Disseldorp
and committed by
Christian Brauner
aaf76839
7c022500
+48
+48
init/initramfs_test.c
+48
init/initramfs_test.c
···
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kfree(tbufs);
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}
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+
static void __init initramfs_test_fname_path_max(struct kunit *test)
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{
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char *err;
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size_t len;
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struct kstat st0, st1;
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char fdata[] = "this file data will not be unpacked";
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struct test_fname_path_max {
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char fname_oversize[PATH_MAX + 1];
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char fname_ok[PATH_MAX];
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char cpio_src[(CPIO_HDRLEN + PATH_MAX + 3 + sizeof(fdata)) * 2];
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} *tbufs = kzalloc(sizeof(struct test_fname_path_max), GFP_KERNEL);
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struct initramfs_test_cpio c[] = { {
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.magic = "070701",
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.ino = 1,
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.mode = S_IFDIR | 0777,
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.nlink = 1,
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.namesize = sizeof(tbufs->fname_oversize),
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.fname = tbufs->fname_oversize,
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.filesize = sizeof(fdata),
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.data = fdata,
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}, {
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.magic = "070701",
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.ino = 2,
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.mode = S_IFDIR | 0777,
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.nlink = 1,
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.namesize = sizeof(tbufs->fname_ok),
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.fname = tbufs->fname_ok,
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} };
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memset(tbufs->fname_oversize, '/', sizeof(tbufs->fname_oversize) - 1);
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memset(tbufs->fname_ok, '/', sizeof(tbufs->fname_ok) - 1);
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memcpy(tbufs->fname_oversize, "fname_oversize",
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sizeof("fname_oversize") - 1);
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memcpy(tbufs->fname_ok, "fname_ok", sizeof("fname_ok") - 1);
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len = fill_cpio(c, ARRAY_SIZE(c), tbufs->cpio_src);
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/* unpack skips over fname_oversize instead of returning an error */
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err = unpack_to_rootfs(tbufs->cpio_src, len);
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KUNIT_EXPECT_NULL(test, err);
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KUNIT_EXPECT_EQ(test, init_stat("fname_oversize", &st0, 0), -ENOENT);
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KUNIT_EXPECT_EQ(test, init_stat("fname_ok", &st1, 0), 0);
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KUNIT_EXPECT_EQ(test, init_rmdir("fname_ok"), 0);
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kfree(tbufs);
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}
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/*
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* The kunit_case/_suite struct cannot be marked as __initdata as this will be
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* used in debugfs to retrieve results after test has run.
···
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KUNIT_CASE(initramfs_test_hardlink),
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KUNIT_CASE(initramfs_test_many),
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KUNIT_CASE(initramfs_test_fname_pad),
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KUNIT_CASE(initramfs_test_fname_path_max),
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{},
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};
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