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| author | Kees Cook <keescook@chromium.org> | 2017-03-24 10:51:25 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-08 17:56:02 +0200 |
| commit | e22aa9d781a27a961581c57442911309fb86a48e (patch) | |
| tree | 96f46cc8f24081f40bdbd41c1a4457258cb75e3b /drivers/misc/lkdtm_core.c | |
| parent | 8ab44b4003381cf4bae7ccdfe81059aa9ce76033 (diff) | |
| download | linux-e22aa9d781a27a961581c57442911309fb86a48e.tar.gz linux-e22aa9d781a27a961581c57442911309fb86a48e.tar.bz2 linux-e22aa9d781a27a961581c57442911309fb86a48e.zip | |
lkdtm: add bad USER_DS test
This adds CORRUPT_USER_DS to check that the get_fs() test on syscall
return (via __VERIFY_PRE_USERMODE_STATE) still sees USER_DS. Since
trying to deal with values other than USER_DS and KERNEL_DS across all
architectures in a safe way is not sensible, this sets KERNEL_DS, but
since that could be extremely dangerous if the protection is not present,
it also raises SIGKILL for current, so that no matter what, the process
will die. A successful test will be visible with a BUG(), like all the
other LKDTM tests.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/lkdtm_core.c')
| -rw-r--r-- | drivers/misc/lkdtm_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c index b9a4cd4a9b68..42d2b8e31e6b 100644 --- a/drivers/misc/lkdtm_core.c +++ b/drivers/misc/lkdtm_core.c @@ -199,6 +199,7 @@ struct crashtype crashtypes[] = { CRASHTYPE(OVERFLOW), CRASHTYPE(CORRUPT_LIST_ADD), CRASHTYPE(CORRUPT_LIST_DEL), + CRASHTYPE(CORRUPT_USER_DS), CRASHTYPE(CORRUPT_STACK), CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE), CRASHTYPE(OVERWRITE_ALLOCATION), |