diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 7 | ||||
| -rw-r--r-- | init/initramfs_test.c | 48 |
2 files changed, 53 insertions, 2 deletions
diff --git a/init/Kconfig b/init/Kconfig index fa79feb8fe57..160c1c4ef253 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -624,8 +624,9 @@ config SCHED_HW_PRESSURE arch_update_hw_pressure() and arch_scale_thermal_pressure(). config BSD_PROCESS_ACCT - bool "BSD Process Accounting" + bool "BSD Process Accounting (DEPRECATED)" depends on MULTIUSER + default n help If you say Y here, a user level program will be able to instruct the kernel (via a special system call) to write process accounting @@ -635,7 +636,9 @@ config BSD_PROCESS_ACCT command name, memory usage, controlling terminal etc. (the complete list is in the struct acct in <file:include/linux/acct.h>). It is up to the user level program to do useful things with this - information. This is generally a good idea, so say Y. + information. This mechanism is antiquated and has significant + scalability issues. You probably want to use eBPF instead. Say + N unless you really need this. config BSD_PROCESS_ACCT_V3 bool "BSD Process Accounting version 3 file format" diff --git a/init/initramfs_test.c b/init/initramfs_test.c index 5d2db455e60c..beb6e3cf7808 100644 --- a/init/initramfs_test.c +++ b/init/initramfs_test.c @@ -447,6 +447,53 @@ out: kfree(tbufs); } +static void __init initramfs_test_fname_path_max(struct kunit *test) +{ + char *err; + size_t len; + struct kstat st0, st1; + char fdata[] = "this file data will not be unpacked"; + struct test_fname_path_max { + char fname_oversize[PATH_MAX + 1]; + char fname_ok[PATH_MAX]; + char cpio_src[(CPIO_HDRLEN + PATH_MAX + 3 + sizeof(fdata)) * 2]; + } *tbufs = kzalloc(sizeof(struct test_fname_path_max), GFP_KERNEL); + struct initramfs_test_cpio c[] = { { + .magic = "070701", + .ino = 1, + .mode = S_IFDIR | 0777, + .nlink = 1, + .namesize = sizeof(tbufs->fname_oversize), + .fname = tbufs->fname_oversize, + .filesize = sizeof(fdata), + .data = fdata, + }, { + .magic = "070701", + .ino = 2, + .mode = S_IFDIR | 0777, + .nlink = 1, + .namesize = sizeof(tbufs->fname_ok), + .fname = tbufs->fname_ok, + } }; + + memset(tbufs->fname_oversize, '/', sizeof(tbufs->fname_oversize) - 1); + memset(tbufs->fname_ok, '/', sizeof(tbufs->fname_ok) - 1); + memcpy(tbufs->fname_oversize, "fname_oversize", + sizeof("fname_oversize") - 1); + memcpy(tbufs->fname_ok, "fname_ok", sizeof("fname_ok") - 1); + len = fill_cpio(c, ARRAY_SIZE(c), tbufs->cpio_src); + + /* unpack skips over fname_oversize instead of returning an error */ + err = unpack_to_rootfs(tbufs->cpio_src, len); + KUNIT_EXPECT_NULL(test, err); + + KUNIT_EXPECT_EQ(test, init_stat("fname_oversize", &st0, 0), -ENOENT); + KUNIT_EXPECT_EQ(test, init_stat("fname_ok", &st1, 0), 0); + KUNIT_EXPECT_EQ(test, init_rmdir("fname_ok"), 0); + + kfree(tbufs); +} + /* * The kunit_case/_suite struct cannot be marked as __initdata as this will be * used in debugfs to retrieve results after test has run. @@ -459,6 +506,7 @@ static struct kunit_case __refdata initramfs_test_cases[] = { KUNIT_CASE(initramfs_test_hardlink), KUNIT_CASE(initramfs_test_many), KUNIT_CASE(initramfs_test_fname_pad), + KUNIT_CASE(initramfs_test_fname_path_max), {}, }; |