stack police: don't allocate statvfs on the stack.
This commit is contained in:
christos
parent
54cd6fafa8
commit
d5ba7564d8
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@ -1,4 +1,4 @@
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/* $NetBSD: svr4_misc.c,v 1.116 2006/03/01 12:38:12 yamt Exp $ */
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/* $NetBSD: svr4_misc.c,v 1.117 2006/06/09 23:24:24 christos Exp $ */
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/*-
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* Copyright (c) 1994 The NetBSD Foundation, Inc.
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@ -44,7 +44,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: svr4_misc.c,v 1.116 2006/03/01 12:38:12 yamt Exp $");
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__KERNEL_RCSID(0, "$NetBSD: svr4_misc.c,v 1.117 2006/06/09 23:24:24 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -114,6 +114,8 @@ static void bsd_statvfs_to_svr4_statvfs __P((const struct statvfs *,
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struct svr4_statvfs *));
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static void bsd_statvfs_to_svr4_statvfs64 __P((const struct statvfs *,
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struct svr4_statvfs64 *));
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static int svr4_copystatvfs64(struct svr4_statvfs64 *, const struct statvfs *);
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static int svr4_copystatvfs(struct svr4_statvfs *, const struct statvfs *);
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#define svr4_pfind(pid) p_find((pid), PFIND_UNLOCK | PFIND_ZOMBIE)
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static int svr4_mknod __P((struct lwp *, register_t *, const char *,
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@ -1228,6 +1230,44 @@ svr4_sys_waitsys(l, v, retval)
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}
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static int
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svr4_copystatvfs64(struct svr4_statvfs64 *sufs, const struct statvfs *bufs)
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{
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struct svr4_statvfs64 *skfs = malloc(sizeof(*skfs), M_TEMP, M_WAITOK);
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struct statvfs *bkfs = malloc(sizeof(*bkfs), M_TEMP, M_WAITOK);
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int error;
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if ((error = copyin(sufs, bkfs, sizeof(*bkfs))) != 0)
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goto out;
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bsd_statvfs_to_svr4_statvfs64(bkfs, skfs);
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error = copyout(skfs, sufs, sizeof(*skfs));
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out:
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free(skfs, M_TEMP);
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free(bkfs, M_TEMP);
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return error;
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}
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static int
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svr4_copystatvfs(struct svr4_statvfs *sufs, const struct statvfs *bufs)
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{
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struct svr4_statvfs *skfs = malloc(sizeof(*skfs), M_TEMP, M_WAITOK);
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struct statvfs *bkfs = malloc(sizeof(*bkfs), M_TEMP, M_WAITOK);
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int error;
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if ((error = copyin(bufs, bkfs, sizeof(*bkfs))) != 0)
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goto out;
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bsd_statvfs_to_svr4_statvfs(bkfs, skfs);
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error = copyout(skfs, sufs, sizeof(*skfs));
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out:
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free(skfs, M_TEMP);
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free(bkfs, M_TEMP);
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return error;
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}
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static void
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bsd_statvfs_to_svr4_statvfs(const struct statvfs *bfs,
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struct svr4_statvfs *sfs)
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@ -1289,8 +1329,6 @@ svr4_sys_statvfs(l, v, retval)
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struct proc *p = l->l_proc;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_statvfs sfs;
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int error;
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CHECK_ALT_EXIST(l, &sg, SCARG(uap, path));
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@ -1301,12 +1339,7 @@ svr4_sys_statvfs(l, v, retval)
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if ((error = sys_statvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_statvfs(&bfs, &sfs);
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return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs(SCARG(uap, fs), fs);
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}
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@ -1321,8 +1354,6 @@ svr4_sys_fstatvfs(l, v, retval)
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struct sys_fstatvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_statvfs sfs;
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int error;
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SCARG(&fs_args, fd) = SCARG(uap, fd);
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@ -1332,12 +1363,7 @@ svr4_sys_fstatvfs(l, v, retval)
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if ((error = sys_fstatvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_statvfs(&bfs, &sfs);
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return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs(SCARG(uap, fs), fs);
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}
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@ -1352,8 +1378,6 @@ svr4_sys_statvfs64(l, v, retval)
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struct sys_statvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_statvfs64 sfs;
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int error;
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CHECK_ALT_EXIST(l, &sg, SCARG(uap, path));
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@ -1364,12 +1388,7 @@ svr4_sys_statvfs64(l, v, retval)
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if ((error = sys_statvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_statvfs64(&bfs, &sfs);
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return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs64(SCARG(uap, fs), fs);
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}
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@ -1384,8 +1403,6 @@ svr4_sys_fstatvfs64(l, v, retval)
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struct sys_fstatvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_statvfs64 sfs;
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int error;
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SCARG(&fs_args, fd) = SCARG(uap, fd);
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@ -1395,15 +1412,11 @@ svr4_sys_fstatvfs64(l, v, retval)
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if ((error = sys_fstatvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_statvfs64(&bfs, &sfs);
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return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs64(SCARG(uap, fs), fs);
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}
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int
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svr4_sys_alarm(l, v, retval)
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struct lwp *l;
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@ -1,4 +1,4 @@
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/* $NetBSD: svr4_32_misc.c,v 1.35 2006/03/01 12:38:12 yamt Exp $ */
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/* $NetBSD: svr4_32_misc.c,v 1.36 2006/06/09 23:24:25 christos Exp $ */
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/*-
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* Copyright (c) 1994 The NetBSD Foundation, Inc.
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@ -44,7 +44,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: svr4_32_misc.c,v 1.35 2006/03/01 12:38:12 yamt Exp $");
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__KERNEL_RCSID(0, "$NetBSD: svr4_32_misc.c,v 1.36 2006/06/09 23:24:25 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -114,6 +114,8 @@ static void bsd_statvfs_to_svr4_32_statvfs __P((const struct statvfs *,
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struct svr4_32_statvfs *));
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static void bsd_statvfs_to_svr4_32_statvfs64 __P((const struct statvfs *,
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struct svr4_32_statvfs64 *));
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static int svr4_copystatvfs64(struct svr4_32_statvfs64 *, const struct statvfs *);
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static int svr4_copystatvfs(struct svr4_32_statvfs *, const struct statvfs *);
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#define svr4_32_pfind(pid) p_find((pid), PFIND_UNLOCK | PFIND_ZOMBIE)
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static int svr4_32_mknod __P((struct lwp *, register_t *, const char *,
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@ -1245,6 +1247,43 @@ svr4_32_sys_waitsys(l, v, retval)
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SCARG(uap, info));
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}
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static int
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svr4_copystatvfs64(struct svr4_32_statvfs64 *sufs, const struct statvfs *bufs)
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{
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struct svr4_statvfs64 *skfs = malloc(sizeof(*skfs), M_TEMP, M_WAITOK);
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struct statvfs *bkfs = malloc(sizeof(*bkfs), M_TEMP, M_WAITOK);
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int error;
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if ((error = copyin(sufs, bkfs, sizeof(*bkfs))) != 0)
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goto out;
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bsd_statvfs_to_svr4_statvfs64(bkfs, skfs);
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error = copyout(skfs, sufs, sizeof(*skfs));
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out:
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free(skfs, M_TEMP);
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free(bkfs, M_TEMP);
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return error;
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}
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static int
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svr4_copystatvfs(struct svr4_32_statvfs *sufs, const struct statvfs *bufs)
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{
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struct svr4_statvfs *skfs = malloc(sizeof(*skfs), M_TEMP, M_WAITOK);
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struct statvfs *bkfs = malloc(sizeof(*bkfs), M_TEMP, M_WAITOK);
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int error;
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if ((error = copyin(bufs, bkfs, sizeof(*bkfs))) != 0)
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goto out;
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bsd_statvfs_to_svr4_statvfs(bkfs, skfs);
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error = copyout(skfs, sufs, sizeof(*skfs));
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out:
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free(skfs, M_TEMP);
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free(bkfs, M_TEMP);
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return error;
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}
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static void
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bsd_statvfs_to_svr4_32_statvfs(bfs, sfs)
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@ -1309,8 +1348,6 @@ svr4_32_sys_statvfs(l, v, retval)
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struct sys_statvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_32_statvfs sfs;
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int error;
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SCARG(&fs_args, path) = (caddr_t)(u_long)SCARG(uap, path);
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@ -1321,12 +1358,7 @@ svr4_32_sys_statvfs(l, v, retval)
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if ((error = sys_statvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_32_statvfs(&bfs, &sfs);
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return copyout(&sfs, (caddr_t)(u_long)SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs(SCARG(uap, fs), fs);
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}
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@ -1341,8 +1373,6 @@ svr4_32_sys_fstatvfs(l, v, retval)
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struct sys_fstatvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_32_statvfs sfs;
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int error;
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SCARG(&fs_args, fd) = SCARG(uap, fd);
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@ -1352,12 +1382,7 @@ svr4_32_sys_fstatvfs(l, v, retval)
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if ((error = sys_fstatvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_32_statvfs(&bfs, &sfs);
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return copyout(&sfs, (caddr_t)(u_long)SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs(SCARG(uap, fs), fs);
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}
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@ -1372,8 +1397,6 @@ svr4_32_sys_statvfs64(l, v, retval)
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struct proc *p = l->l_proc;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_32_statvfs64 sfs;
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int error;
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SCARG(&fs_args, path) = (caddr_t)(u_long)SCARG(uap, path);
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@ -1384,12 +1407,7 @@ svr4_32_sys_statvfs64(l, v, retval)
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if ((error = sys_statvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_32_statvfs64(&bfs, &sfs);
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return copyout(&sfs, (caddr_t)(u_long)SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs64(SCARG(uap, fs), fs);
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}
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@ -1404,8 +1422,6 @@ svr4_32_sys_fstatvfs64(l, v, retval)
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struct sys_fstatvfs1_args fs_args;
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caddr_t sg = stackgap_init(p, 0);
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struct statvfs *fs = stackgap_alloc(p, &sg, sizeof(struct statvfs));
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struct statvfs bfs;
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struct svr4_32_statvfs64 sfs;
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int error;
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SCARG(&fs_args, fd) = SCARG(uap, fd);
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@ -1415,12 +1431,7 @@ svr4_32_sys_fstatvfs64(l, v, retval)
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if ((error = sys_fstatvfs1(l, &fs_args, retval)) != 0)
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return error;
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if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
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return error;
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bsd_statvfs_to_svr4_32_statvfs64(&bfs, &sfs);
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return copyout(&sfs, (caddr_t)(u_long)SCARG(uap, fs), sizeof(sfs));
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return svr4_copystatvfs64(SCARG(uap, fs), fs);
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}
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