3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
64 lines
1.7 KiB
Diff
64 lines
1.7 KiB
Diff
Index: kern_exec.c
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===================================================================
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RCS file: /home/ncvs/src/sys/kern/kern_exec.c,v
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retrieving revision 1.107.2.7
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diff -u -r1.107.2.7 kern_exec.c
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--- kern_exec.c 2001/06/16 23:39:08 1.107.2.7
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+++ kern_exec.c 2001/07/10 00:43:48
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@@ -29,7 +29,6 @@
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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-#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/filedesc.h>
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@@ -39,9 +38,10 @@
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#include <sys/imgact.h>
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#include <sys/imgact_elf.h>
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#include <sys/wait.h>
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+#include <sys/malloc.h>
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#include <sys/proc.h>
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+#include <sys/signalvar.h>
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#include <sys/pioctl.h>
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-#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/sysent.h>
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#include <sys/shm.h>
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@@ -59,6 +59,7 @@
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#include <vm/vm_object.h>
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#include <vm/vm_pager.h>
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+#include <sys/user.h>
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#include <machine/reg.h>
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MALLOC_DEFINE(M_PARGS, "proc-args", "Process arguments");
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@@ -244,6 +245,28 @@
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tmp = fdcopy(p);
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fdfree(p);
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p->p_fd = tmp;
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+ }
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+
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+ /*
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+ * For security and other reasons, signal handlers cannot
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+ * be shared after an exec. The new proces gets a copy of the old
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+ * handlers. In execsigs(), the new process wll have its signals
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+ * reset.
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+ */
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+ if (p->p_procsig->ps_refcnt > 1) {
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+ struct procsig *newprocsig;
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+
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+ MALLOC(newprocsig, struct procsig *, sizeof(struct procsig),
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+ M_SUBPROC, M_WAITOK);
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+ bcopy(p->p_procsig, newprocsig, sizeof(*newprocsig));
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+ p->p_procsig->ps_refcnt--;
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+ p->p_procsig = newprocsig;
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+ p->p_procsig->ps_refcnt = 1;
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+ if (p->p_sigacts == &p->p_addr->u_sigacts)
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+ panic("shared procsig but private sigacts?\n");
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+
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+ p->p_addr->u_sigacts = *p->p_sigacts;
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+ p->p_sigacts = &p->p_addr->u_sigacts;
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}
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/* Stop profiling */
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