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Use proc lock to protect p_ucred pointer while we deference it to read a

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few values.
This commit is contained in:
jhb 2002-04-11 21:00:38 +00:00
parent b129a4a7ca
commit afc32a4ae3
1 changed files with 4 additions and 0 deletions
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4
sys/compat/svr4/svr4_sysvec.c
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@ -44,7 +44,9 @@
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/socket.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/module.h>
@ -213,10 +215,12 @@ svr4_fixup(register_t **stack_base, struct image_params *imgp)
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
PROC_LOCK(imgp->proc);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
PROC_UNLOCK(imgp->proc);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);