Date: Sun, 23 Jul 2006 17:31:32 +0800 From: "=?GB2312?B?wO7J0L3c?=" <shangjie.li@gmail.com> To: freebsd-hackers@freebsd.org Subject: An error about IPC permission checking Message-ID: <de71d27b0607230231i8b9881bgae98f44b7905edc8@mail.gmail.com>
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in the source code kern/sysv_shm.c:
729 error = ipcperm(td, &shmseg->u.shm_perm, mode);
730 #ifdef MAC
731 error = mac_check_sysv_shmget(td->td_ucred, shmseg, uap->shmflg);
732 if (error != 0)
733 MPRINTF(("mac_check_sysv_shmget returned %d\n", error));
734 #endif
735 if (error)
736 return (error);
The return value of ipcperm() call is not be checked in time, and
interrupted by mac checking, if Mac is enabled.
--
--
|Best regards.
|Shangjie, Li (Ph.D candidate)
|Institute of Software, Chinese Academy of Sciences,
|P.O. Box 8718, Beijing 100080, CHINA
|Phone: (8610)62561197/62635158-1008(O), 82680528(H)
|Email: shangjie02@ios.cn
>---------------------------------------------------<
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