mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-18 04:54:52 +00:00
Yama: handle 32-bit userspace prctl
When running a 64-bit kernel and receiving prctls from a 32-bit userspace, the "-1" used as an unsigned long will end up being misdetected. The kernel is looking for 0xffffffffffffffff instead of 0xffffffff. Since prctl lacks a distinct compat interface, Yama needs to handle this translation itself. As such, support either value as meaning PR_SET_PTRACER_ANY, to avoid breaking the ABI for 64-bit. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: John Johansen <john.johansen@canonical.com> Cc: stable@vger.kernel.org Signed-off-by: James Morris <james.l.morris@oracle.com>
This commit is contained in:
parent
c6993e4ac0
commit
2e4930eb7c
1 changed files with 1 additions and 1 deletions
|
@ -143,7 +143,7 @@ int yama_task_prctl(int option, unsigned long arg2, unsigned long arg3,
|
|||
if (arg2 == 0) {
|
||||
yama_ptracer_del(NULL, myself);
|
||||
rc = 0;
|
||||
} else if (arg2 == PR_SET_PTRACER_ANY) {
|
||||
} else if (arg2 == PR_SET_PTRACER_ANY || (int)arg2 == -1) {
|
||||
rc = yama_ptracer_add(NULL, myself);
|
||||
} else {
|
||||
struct task_struct *tracer;
|
||||
|
|
Loading…
Add table
Reference in a new issue