diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/Kconfig | 1 | ||||
| -rw-r--r-- | arch/um/drivers/virtio_uml.c | 6 | ||||
| -rw-r--r-- | arch/um/include/asm/kasan.h | 5 | ||||
| -rw-r--r-- | arch/um/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/mem.c | 13 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/um/os-Linux/file.c | 2 | ||||
| -rw-r--r-- | arch/um/os-Linux/util.c | 3 |
8 files changed, 22 insertions, 12 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 9083bfdb7735..1d4def0db841 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -5,6 +5,7 @@ menu "UML-specific options" config UML bool default y + select ARCH_NEEDS_DEFER_KASAN if STATIC_LINK select ARCH_WANTS_DYNAMIC_TASK_STRUCT select ARCH_HAS_CACHE_LINE_SIZE select ARCH_HAS_CPU_FINALIZE_INIT diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index ad8d78fb1d9a..de7867ae220d 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -1250,10 +1250,12 @@ static int virtio_uml_probe(struct platform_device *pdev) device_set_wakeup_capable(&vu_dev->vdev.dev, true); rc = register_virtio_device(&vu_dev->vdev); - if (rc) + if (rc) { put_device(&vu_dev->vdev.dev); + return rc; + } vu_dev->registered = 1; - return rc; + return 0; error_init: os_close_file(vu_dev->sock); diff --git a/arch/um/include/asm/kasan.h b/arch/um/include/asm/kasan.h index f97bb1f7b851..b54a4e937fd1 100644 --- a/arch/um/include/asm/kasan.h +++ b/arch/um/include/asm/kasan.h @@ -24,10 +24,9 @@ #ifdef CONFIG_KASAN void kasan_init(void); -extern int kasan_um_is_ready; -#ifdef CONFIG_STATIC_LINK -#define kasan_arch_is_ready() (kasan_um_is_ready) +#if defined(CONFIG_STATIC_LINK) && defined(CONFIG_KASAN_INLINE) +#error UML does not work in KASAN_INLINE mode with STATIC_LINK enabled! #endif #else static inline void kasan_init(void) { } diff --git a/arch/um/kernel/asm-offsets.c b/arch/um/kernel/asm-offsets.c index 1fb12235ab9c..a69873aa697f 100644 --- a/arch/um/kernel/asm-offsets.c +++ b/arch/um/kernel/asm-offsets.c @@ -1 +1,3 @@ +#define COMPILE_OFFSETS + #include <sysdep/kernel-offsets.h> diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 76bec7de81b5..32e3b1972dc1 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -21,10 +21,10 @@ #include <os.h> #include <um_malloc.h> #include <linux/sched/task.h> +#include <linux/kasan.h> #ifdef CONFIG_KASAN -int kasan_um_is_ready; -void kasan_init(void) +void __init kasan_init(void) { /* * kasan_map_memory will map all of the required address space and @@ -32,7 +32,11 @@ void kasan_init(void) */ kasan_map_memory((void *)KASAN_SHADOW_START, KASAN_SHADOW_SIZE); init_task.kasan_depth = 0; - kasan_um_is_ready = true; + /* + * Since kasan_init() is called before main(), + * KASAN is initialized but the enablement is deferred after + * jump_label_init(). See arch_mm_preinit(). + */ } static void (*kasan_init_ptr)(void) @@ -58,6 +62,9 @@ static unsigned long brk_end; void __init arch_mm_preinit(void) { + /* Safe to call after jump_label_init(). Enables KASAN. */ + kasan_init_generic(); + /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 1be644de9e41..9c9c66dc45f0 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -143,7 +143,7 @@ static void fork_handler(void) int copy_thread(struct task_struct * p, const struct kernel_clone_args *args) { - unsigned long clone_flags = args->flags; + u64 clone_flags = args->flags; unsigned long sp = args->stack; unsigned long tls = args->tls; void (*handler)(void); diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c index 617886d1fb1e..21f0e50fb1df 100644 --- a/arch/um/os-Linux/file.c +++ b/arch/um/os-Linux/file.c @@ -535,7 +535,7 @@ ssize_t os_rcv_fd_msg(int fd, int *fds, unsigned int n_fds, cmsg->cmsg_type != SCM_RIGHTS) return n; - memcpy(fds, CMSG_DATA(cmsg), cmsg->cmsg_len); + memcpy(fds, CMSG_DATA(cmsg), cmsg->cmsg_len - CMSG_LEN(0)); return n; } diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c index 4193e04d7e4a..e3ad71a0d13c 100644 --- a/arch/um/os-Linux/util.c +++ b/arch/um/os-Linux/util.c @@ -20,8 +20,7 @@ void stack_protections(unsigned long address) { - if (mprotect((void *) address, UM_THREAD_SIZE, - PROT_READ | PROT_WRITE | PROT_EXEC) < 0) + if (mprotect((void *) address, UM_THREAD_SIZE, PROT_READ | PROT_WRITE) < 0) panic("protecting stack failed, errno = %d", errno); } |