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Only try to copyin a msqid for the IPC_SET command to msgctl(). Other

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commands (such as IPC_RMID) were bogusly failing with EFAULT.

Tested by:	jkim
This commit is contained in:
jhb 2006-10-10 22:46:22 +00:00
parent af5122eb88
commit 2447c3b930
1 changed files with 6 additions and 5 deletions
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11
sys/compat/linux/linux_ipc.c
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@ -628,13 +628,14 @@ linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
struct l_msqid_ds linux_msqid;
struct msqid_ds bsd_msqid;
error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
&linux_msqid, PTRIN(args->buf));
if (error != 0)
return (error);
bsd_cmd = args->cmd & ~LINUX_IPC_64;
if (bsd_cmd == LINUX_IPC_SET)
if (bsd_cmd == LINUX_IPC_SET) {
error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
&linux_msqid, PTRIN(args->buf));
if (error)
return (error);
linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
}
error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
if (error != 0)