Date: Tue, 12 Dec 95 15:25:33 +0900 From: Mihoko Tanaka <m_tanaka@pa.yokogawa.co.jp> To: freebsd-hackers@freebsd.org Subject: ipcs bug Message-ID: <9512120625.AA08759@cabbage.pa.yokogawa.co.jp>
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Hi all,
I found a trouble in 'ipcs' command.
If SHMMNI is bigger than MSGMNI, ipcs occurs core dump.
The 'ipcs' allocates the buffer for the shared memory
information , but its size is wrong.
In /usr/src/usr.bin/ipcs/ipcs.c:
if (display & SHMINFO) {
struct shmid_ds *xshmids;
kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
xshmids = malloc(sizeof(struct shmid_ds) * msginfo.msgmni);
~~~~~~~~~~~~~~~
I think that it should be 'shminfo.msgmni'
----------------- cut here ----------------------------------
--- ipcs.c Mon Sep 19 19:24:38 1994
+++ ipcs.c.new Tue Dec 12 15:08:07 1995
@@ -310,7 +310,7 @@
struct shmid_ds *xshmids;
kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
- xshmids = malloc(sizeof(struct shmid_ds) * msginfo.msgmni);
+ xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
shminfo.shmmni);
----------------- cut here ----------------------------------
--
Mihoko Tanaka
<m_tanaka@pa.yokogawa.co.jp>
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