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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2018-11-25 18:36:37 +0100 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-11-25 18:36:37 +0100 |
| commit | 9102112c620df22e0e0c1fa6b6d4851d8ffb0b18 (patch) | |
| tree | 4ec6caedf4aa94348b97b4c0159f5909368ed58a | |
| parent | Depend on SECURITY_SELINUX_DEVELOP (diff) | |
| download | kernel-assisted-superuser-9102112c620df22e0e0c1fa6b6d4851d8ffb0b18.tar.xz kernel-assisted-superuser-9102112c620df22e0e0c1fa6b6d4851d8ffb0b18.zip | |
Wrap at 80 chars
| -rw-r--r-- | superuser.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/superuser.c b/superuser.c index efc0fd7..3df1b4f 100644 --- a/superuser.c +++ b/superuser.c @@ -24,7 +24,8 @@ static bool is_su(const char __user *filename) static const char su_path[] = "/system/bin/su"; char ufn[sizeof(su_path)]; - return likely(!copy_from_user(ufn, filename, sizeof(ufn))) && unlikely(!memcmp(ufn, su_path, sizeof(ufn))); + return likely(!copy_from_user(ufn, filename, sizeof(ufn))) && + unlikely(!memcmp(ufn, su_path, sizeof(ufn))); } static void __user *userspace_stack_buffer(const void *d, size_t len) @@ -42,8 +43,10 @@ static char __user *sh_user_path(void) return userspace_stack_buffer(sh_path, sizeof(sh_path)); } -static long(*old_newfstatat)(int dfd, const char __user *filename, struct stat *statbuf, int flag); -static long new_newfstatat(int dfd, const char __user *filename, struct stat __user *statbuf, int flag) +static long(*old_newfstatat)(int dfd, const char __user *filename, + struct stat *statbuf, int flag); +static long new_newfstatat(int dfd, const char __user *filename, + struct stat __user *statbuf, int flag) { if (!is_su(filename)) return old_newfstatat(dfd, filename, statbuf, flag); @@ -59,8 +62,12 @@ static long new_faccessat(int dfd, const char __user *filename, int mode) } extern int selinux_enforcing; -static long (*old_execve)(const char __user *filename, const char __user *const __user *argv, const char __user *const __user *envp); -static long new_execve(const char __user *filename, const char __user *const __user *argv, const char __user *const __user *envp) +static long (*old_execve)(const char __user *filename, + const char __user *const __user *argv, + const char __user *const __user *envp); +static long new_execve(const char __user *filename, + const char __user *const __user *argv, + const char __user *const __user *envp) { static const char now_root[] = "You are now root.\n"; struct cred *cred; @@ -92,7 +99,8 @@ static long new_execve(const char __user *filename, const char __user *const __u memset(&cred->cap_bset, 0xff, sizeof(cred->cap_bset)); memset(&cred->cap_ambient, 0xff, sizeof(cred->cap_ambient)); - sys_write(2, userspace_stack_buffer(now_root, sizeof(now_root)), sizeof(now_root) - 1); + sys_write(2, userspace_stack_buffer(now_root, sizeof(now_root)), + sizeof(now_root) - 1); return old_execve(sh_user_path(), argv, envp); } |