From: Christophe Leroy christophe.leroy@c-s.fr

[ Upstream commit 4c411157a42f122051ae3469bee0b5cabe89e139 ]

Today, when doing a lkdtm test before the readiness of the random generator, (ptrval) is printed instead of the address at which it perform the fault:

[ 1597.337030] lkdtm: Performing direct entry EXEC_USERSPACE [ 1597.337142] lkdtm: attempting ok execution at (ptrval) [ 1597.337398] lkdtm: attempting bad execution at (ptrval) [ 1597.337460] kernel tried to execute user page (77858000) -exploit attempt? (uid: 0) [ 1597.344769] Unable to handle kernel paging request for instruction fetch [ 1597.351392] Faulting instruction address: 0x77858000 [ 1597.356312] Oops: Kernel access of bad area, sig: 11 [#1]

If the lkdtm test is done later on, it prints an hashed address.

In both cases this is pointless. The purpose of the test is to ensure the kernel generates an Oops at the expected address, so real addresses needs to be printed. This patch fixes that.

Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/misc/lkdtm/perms.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/misc/lkdtm/perms.c b/drivers/misc/lkdtm/perms.c index 53b85c9d16b8..fa54add6375a 100644 --- a/drivers/misc/lkdtm/perms.c +++ b/drivers/misc/lkdtm/perms.c @@ -47,7 +47,7 @@ static noinline void execute_location(void *dst, bool write) { void (*func)(void) = dst;

- pr_info("attempting ok execution at %p\n", do_nothing); + pr_info("attempting ok execution at %px\n", do_nothing); do_nothing();

if (write == CODE_WRITE) { @@ -55,7 +55,7 @@ static noinline void execute_location(void *dst, bool write) flush_icache_range((unsigned long)dst, (unsigned long)dst + EXEC_SIZE); } - pr_info("attempting bad execution at %p\n", func); + pr_info("attempting bad execution at %px\n", func); func(); }

@@ -66,14 +66,14 @@ static void execute_user_location(void *dst) /* Intentionally crossing kernel/user memory boundary. */ void (*func)(void) = dst;

- pr_info("attempting ok execution at %p\n", do_nothing); + pr_info("attempting ok execution at %px\n", do_nothing); do_nothing();

copied = access_process_vm(current, (unsigned long)dst, do_nothing, EXEC_SIZE, FOLL_WRITE); if (copied < EXEC_SIZE) return; - pr_info("attempting bad execution at %p\n", func); + pr_info("attempting bad execution at %px\n", func); func(); }

@@ -82,7 +82,7 @@ void lkdtm_WRITE_RO(void) /* Explicitly cast away "const" for the test. */ unsigned long *ptr = (unsigned long *)&rodata;

- pr_info("attempting bad rodata write at %p\n", ptr); + pr_info("attempting bad rodata write at %px\n", ptr); *ptr ^= 0xabcd1234; }

@@ -100,7 +100,7 @@ void lkdtm_WRITE_RO_AFTER_INIT(void) return; }

- pr_info("attempting bad ro_after_init write at %p\n", ptr); + pr_info("attempting bad ro_after_init write at %px\n", ptr); *ptr ^= 0xabcd1234; }

@@ -112,7 +112,7 @@ void lkdtm_WRITE_KERN(void) size = (unsigned long)do_overwritten - (unsigned long)do_nothing; ptr = (unsigned char *)do_overwritten;

- pr_info("attempting bad %zu byte write at %p\n", size, ptr); + pr_info("attempting bad %zu byte write at %px\n", size, ptr); memcpy(ptr, (unsigned char *)do_nothing, size); flush_icache_range((unsigned long)ptr, (unsigned long)(ptr + size));

@@ -185,11 +185,11 @@ void lkdtm_ACCESS_USERSPACE(void)

ptr = (unsigned long *)user_addr;

- pr_info("attempting bad read at %p\n", ptr); + pr_info("attempting bad read at %px\n", ptr); tmp = *ptr; tmp += 0xc0dec0de;

- pr_info("attempting bad write at %p\n", ptr); + pr_info("attempting bad write at %px\n", ptr); *ptr = tmp;

vm_munmap(user_addr, PAGE_SIZE);

From: wentalou Wentao.Lou@amd.com

[ Upstream commit 14d20ec7f31ef96a2e7dcf7880b13dde1d473b56 ]

psp_ring_destroy inside psp_load_fw cause psp->km_ring.ring_mem NULL. Call Trace occurred when psp_cmd_submit. should be psp_ring_stop instead.

Reviewed-by: Xiangliang Yu Xiangliang.Yu@amd.com Signed-off-by: Wentao Lou Wentao.Lou@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c index 3a9b48b227ac..a7208ca0bfe3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c @@ -546,7 +546,7 @@ static int psp_load_fw(struct amdgpu_device *adev) struct psp_context *psp = &adev->psp;

if (amdgpu_sriov_vf(adev) && adev->in_gpu_reset) { - psp_ring_destroy(psp, PSP_RING_TYPE__KM); + psp_ring_stop(psp, PSP_RING_TYPE__KM); /* should not destroy ring, only stop */ goto skip_memalloc; }