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kernel: don't trigger page fault when become manager. fix #836

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weishu
2023-08-09 12:33:05 +08:00
parent 936b650f12
commit beaa048be3
1 changed files with 3 additions and 1 deletions
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4
kernel/core_hook.c
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@@ -232,8 +232,10 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
// someone wants to be root manager, just check it! // someone wants to be root manager, just check it!
// arg3 should be `/data/user/<userId>/<manager_package_name>` // arg3 should be `/data/user/<userId>/<manager_package_name>`
char param[128]; char param[128];
if (copy_from_user(param, arg3, sizeof(param))) { if (ksu_strncpy_from_user_nofault(param, arg3, sizeof(param))) {
#ifdef CONFIG_KSU_DEBUG
pr_err("become_manager: copy param err\n"); pr_err("become_manager: copy param err\n");
#endif
return 0; return 0;
} }