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utime: proper auth checks

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Matheus
2024-08-24 23:16:55 -03:00
parent 0e0471f8ee
commit cb1cf8a31f
1 changed files with 10 additions and 0 deletions
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kernel-src/sys/syscalls/utime.c
+10
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@@ -1,6 +1,7 @@
#include <kernel/syscalls.h> #include <kernel/syscalls.h>
#include <kernel/alloc.h> #include <kernel/alloc.h>
#include <kernel/timekeeper.h> #include <kernel/timekeeper.h>
#include <kernel/auth.h>
syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[2], int flags) { syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[2], int flags) {
syscallret_t ret = { syscallret_t ret = {
@@ -67,6 +68,15 @@ syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[
attr.atime = ts[0]; attr.atime = ts[0];
attr.mtime = ts[1]; attr.mtime = ts[1];
ret.errno = auth_filesystem_check(&_cpu()->thread->proc->cred, AUTH_ACTIONS_FILESYSTEM_SETATTR, node);
if (ret.errno) {
if (uts == NULL)
ret.errno = VOP_ACCESS(node, V_ACCESS_WRITE, &_cpu()->thread->proc->cred);
if (ret.errno)
goto cleanup;
}
ret.errno = VOP_SETATTR(node, &attr, V_ATTR_ATIME | V_ATTR_MTIME, &_cpu()->thread->proc->cred); ret.errno = VOP_SETATTR(node, &attr, V_ATTR_ATIME | V_ATTR_MTIME, &_cpu()->thread->proc->cred);
ret.ret = ret.errno ? -1 : 0; ret.ret = ret.errno ? -1 : 0;