Messages in this thread |  | | Date | Thu, 16 Nov 2000 11:57:15 -0500 (EST) | From | Richard Jerrell <> | Subject | Bug in 2.4.0-test9 and test10 with sys_shmat() |
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Sending -1 as the shmid to shmat will cause an oops. 2.2.16 caught this with simple boundry checking, so replace the lines
if (!shm_sb || (shmid % SEQ_MULTIPLIER) == zero_id) return -EINVAL;
with
if (!shm_sb || shmid < 0 || (shmid % SEQ_MULTIPLIER) == zero_id) return -EINVAL;
Simple program to demonstrate the bug...
#include <sys/ipc.h> #include <sys/shm.h>
int main(void) { shmat(-1,0,0); return 0; }
Rich jerrell@missioncriticallinux.com
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