diff options
| author | Kees Cook <keescook@chromium.org> | 2016-06-26 22:26:11 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-07-07 11:09:23 -0700 |
| commit | 329d416ca0ecc38c2be2515897d0e0e8780af1ce (patch) | |
| tree | 1e1a1c5b13dfaa6f60955a71dad93e859bbb76a8 /drivers/misc/lkdtm_core.c | |
| parent | 00f496c416122e7f5a572a4511cf87c7240ba761 (diff) | |
lkdtm: remove intentional off-by-one array access
There wasn't a good reason for keeping the enum and the names out of sync
by 1 position just to avoid "NONE" and "INVALID" from being in the string
lists.
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/misc/lkdtm_core.c')
| -rw-r--r-- | drivers/misc/lkdtm_core.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c index e0f10131511f..4f9d2f32c88b 100644 --- a/drivers/misc/lkdtm_core.c +++ b/drivers/misc/lkdtm_core.c @@ -111,6 +111,7 @@ enum ctype { }; static char* cp_name[] = { + "INVALID", "INT_HARDWARE_ENTRY", "INT_HW_IRQ_EN", "INT_TASKLET_ENTRY", @@ -123,6 +124,7 @@ static char* cp_name[] = { }; static char* cp_type[] = { + "NONE", "PANIC", "BUG", "WARNING", @@ -257,7 +259,7 @@ static enum ctype parse_cp_type(const char *what, size_t count) for (i = 0; i < ARRAY_SIZE(cp_type); i++) { if (!strcmp(what, cp_type[i])) - return i + 1; + return i; } return CT_NONE; @@ -266,9 +268,9 @@ static enum ctype parse_cp_type(const char *what, size_t count) static const char *cp_type_to_str(enum ctype type) { if (type == CT_NONE || type < 0 || type > ARRAY_SIZE(cp_type)) - return "None"; + return "NONE"; - return cp_type[type - 1]; + return cp_type[type]; } static const char *cp_name_to_str(enum cname name) @@ -276,7 +278,7 @@ static const char *cp_name_to_str(enum cname name) if (name == CN_INVALID || name < 0 || name > ARRAY_SIZE(cp_name)) return "INVALID"; - return cp_name[name - 1]; + return cp_name[name]; } @@ -304,9 +306,13 @@ static int lkdtm_parse_commandline(void) if (cptype == CT_NONE) return -EINVAL; + /* Refuse INVALID as a selectable crashpoint name. */ + if (!strcmp(cpoint_name, "INVALID")) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(cp_name); i++) { if (!strcmp(cpoint_name, cp_name[i])) { - cpoint = i + 1; + cpoint = i; return 0; } } |