diff options
| author | Kees Cook <keescook@chromium.org> | 2021-09-02 01:34:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-10 17:09:40 +0200 |
| commit | 3a3a11e6e5a2bc0595c7e36ae33c861c9e8c75b1 (patch) | |
| tree | 6762298294782347644214de7d90a3a0e913eb1d | |
| parent | Merge tag '5.15-rc-ksmbd-part2' of git://git.samba.org/ksmbd (diff) | |
| download | linux-3a3a11e6e5a2bc0595c7e36ae33c861c9e8c75b1.tar.xz linux-3a3a11e6e5a2bc0595c7e36ae33c861c9e8c75b1.zip | |
lkdtm: Use init_uts_ns.name instead of macros
Using generated/compile.h triggered a full LKDTM rebuild with every
build. Avoid this by using the exported strings instead.
Fixes: b8661450bc7f ("lkdtm: Add kernel version to failure hints")
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210901233406.2571643-1-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/lkdtm/core.c | 10 | ||||
| -rw-r--r-- | drivers/misc/lkdtm/lkdtm.h | 28 |
2 files changed, 27 insertions, 11 deletions
diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c index 95b1c6800a22..fe6fd34b8caf 100644 --- a/drivers/misc/lkdtm/core.c +++ b/drivers/misc/lkdtm/core.c @@ -26,6 +26,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/debugfs.h> +#include <linux/utsname.h> #define DEFAULT_COUNT 10 @@ -210,6 +211,8 @@ module_param(cpoint_count, int, 0644); MODULE_PARM_DESC(cpoint_count, " Crash Point Count, number of times the "\ "crash point is to be hit to trigger action"); +/* For test debug reporting. */ +char *lkdtm_kernel_info; /* Return the crashtype number or NULL if the name is invalid */ static const struct crashtype *find_crashtype(const char *name) @@ -490,6 +493,11 @@ static int __init lkdtm_module_init(void) crash_count = cpoint_count; #endif + /* Common initialization. */ + lkdtm_kernel_info = kasprintf(GFP_KERNEL, "kernel (%s %s)", + init_uts_ns.name.release, + init_uts_ns.name.machine); + /* Handle test-specific initialization. */ lkdtm_bugs_init(&recur_count); lkdtm_perms_init(); @@ -538,6 +546,8 @@ static void __exit lkdtm_module_exit(void) if (lkdtm_kprobe != NULL) unregister_kprobe(lkdtm_kprobe); + kfree(lkdtm_kernel_info); + pr_info("Crash point unregistered\n"); } diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h index d7d64d9765eb..c212a253edde 100644 --- a/drivers/misc/lkdtm/lkdtm.h +++ b/drivers/misc/lkdtm/lkdtm.h @@ -5,17 +5,17 @@ #define pr_fmt(fmt) "lkdtm: " fmt #include <linux/kernel.h> -#include <generated/compile.h> -#include <generated/utsrelease.h> -#define LKDTM_KERNEL "kernel (" UTS_RELEASE " " UTS_MACHINE ")" +extern char *lkdtm_kernel_info; #define pr_expected_config(kconfig) \ { \ if (IS_ENABLED(kconfig)) \ - pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y\n"); \ + pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \ + lkdtm_kernel_info); \ else \ - pr_warn("This is probably expected, since this " LKDTM_KERNEL " was built *without* " #kconfig "=y\n"); \ + pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \ + lkdtm_kernel_info); \ } #ifndef MODULE @@ -25,24 +25,30 @@ int lkdtm_check_bool_cmdline(const char *param); if (IS_ENABLED(kconfig)) { \ switch (lkdtm_check_bool_cmdline(param)) { \ case 0: \ - pr_warn("This is probably expected, since this " LKDTM_KERNEL " was built with " #kconfig "=y but booted with '" param "=N'\n"); \ + pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \ + lkdtm_kernel_info); \ break; \ case 1: \ - pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y and booted with '" param "=Y'\n"); \ + pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \ + lkdtm_kernel_info); \ break; \ default: \ - pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y (and booted without '" param "' specified)\n"); \ + pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \ + lkdtm_kernel_info); \ } \ } else { \ switch (lkdtm_check_bool_cmdline(param)) { \ case 0: \ - pr_warn("This is probably expected, as this " LKDTM_KERNEL " was built *without* " #kconfig "=y and booted with '" param "=N'\n"); \ + pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \ + lkdtm_kernel_info); \ break; \ case 1: \ - pr_err("Unexpected! This " LKDTM_KERNEL " was built *without* " #kconfig "=y but booted with '" param "=Y'\n"); \ + pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \ + lkdtm_kernel_info); \ break; \ default: \ - pr_err("This is probably expected, since this " LKDTM_KERNEL " was built *without* " #kconfig "=y (and booted without '" param "' specified)\n"); \ + pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \ + lkdtm_kernel_info); \ break; \ } \ } \ |