gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

uti: Check size of syscall arguments for syscall_intercept

Browse Source 
Change-Id: I747b90e1f521b08266cfc021ef4b23e2e3c7ba4c
This commit is contained in:
Masamichi Takagi
2018-09-02 17:08:37 +09:00
parent c60a778c8d
commit ee299b5780
1 changed files with 5 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
executer/user/mcexec.c
View File

@@ -3020,6 +3020,11 @@ create_tracer(unsigned long user_start, unsigned long user_end)
open("/dev/null", O_WRONLY); open("/dev/null", O_WRONLY);
#endif #endif
/* Initialize list of syscall arguments for syscall_intercept */
if (sizeof(struct syscall_struct) * 11 > PAGE_SIZE) {
fprintf(stderr, "%s: ERROR: param is too large\n", __FUNCTION__);
exit(1);
}
for (i = 1; i <= 10; i++) { for (i = 1; i <= 10; i++) {
param = (struct syscall_struct *)uti_desc->wp + i; param = (struct syscall_struct *)uti_desc->wp + i;
*(void **)param = param_top; *(void **)param = param_top;