diff options
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 67 |
1 files changed, 60 insertions, 7 deletions
diff --git a/fs/exec.c b/fs/exec.c index 4f2bebc276c..8b9011b6704 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -59,7 +59,6 @@ #include <asm/uaccess.h> #include <asm/mmu_context.h> #include <asm/tlb.h> -#include <asm/exec.h> #include <trace/events/task.h> #include "internal.h" @@ -106,7 +105,7 @@ static inline void put_binfmt(struct linux_binfmt * fmt) SYSCALL_DEFINE1(uselib, const char __user *, library) { struct file *file; - char *tmp = getname(library); + struct filename *tmp = getname(library); int error = PTR_ERR(tmp); static const struct open_flags uselib_flags = { .open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC, @@ -392,7 +391,7 @@ struct user_arg_ptr { union { const char __user *const __user *native; #ifdef CONFIG_COMPAT - compat_uptr_t __user *compat; + const compat_uptr_t __user *compat; #endif } ptr; }; @@ -752,13 +751,14 @@ struct file *open_exec(const char *name) { struct file *file; int err; + struct filename tmp = { .name = name }; static const struct open_flags open_exec_flags = { .open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC, .acc_mode = MAY_EXEC | MAY_OPEN, .intent = LOOKUP_OPEN }; - file = do_filp_open(AT_FDCWD, name, &open_exec_flags, LOOKUP_FOLLOW); + file = do_filp_open(AT_FDCWD, &tmp, &open_exec_flags, LOOKUP_FOLLOW); if (IS_ERR(file)) goto out; @@ -1574,9 +1574,9 @@ int do_execve(const char *filename, } #ifdef CONFIG_COMPAT -int compat_do_execve(char *filename, - compat_uptr_t __user *__argv, - compat_uptr_t __user *__envp, +int compat_do_execve(const char *filename, + const compat_uptr_t __user *__argv, + const compat_uptr_t __user *__envp, struct pt_regs *regs) { struct user_arg_ptr argv = { @@ -1658,3 +1658,56 @@ int get_dumpable(struct mm_struct *mm) { return __get_dumpable(mm->flags); } + +#ifdef __ARCH_WANT_SYS_EXECVE +SYSCALL_DEFINE3(execve, + const char __user *, filename, + const char __user *const __user *, argv, + const char __user *const __user *, envp) +{ + struct filename *path = getname(filename); + int error = PTR_ERR(path); + if (!IS_ERR(path)) { + error = do_execve(path->name, argv, envp, current_pt_regs()); + putname(path); + } + return error; +} +#ifdef CONFIG_COMPAT +asmlinkage long compat_sys_execve(const char __user * filename, + const compat_uptr_t __user * argv, + const compat_uptr_t __user * envp) +{ + struct filename *path = getname(filename); + int error = PTR_ERR(path); + if (!IS_ERR(path)) { + error = compat_do_execve(path->name, argv, envp, + current_pt_regs()); + putname(path); + } + return error; +} +#endif +#endif + +#ifdef __ARCH_WANT_KERNEL_EXECVE +int kernel_execve(const char *filename, + const char *const argv[], + const char *const envp[]) +{ + struct pt_regs *p = current_pt_regs(); + int ret; + + ret = do_execve(filename, + (const char __user *const __user *)argv, + (const char __user *const __user *)envp, p); + if (ret < 0) + return ret; + + /* + * We were successful. We won't be returning to our caller, but + * instead to user space by manipulating the kernel stack. + */ + ret_from_kernel_execve(p); +} +#endif |