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MFP4: 115094

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Linux does not check file descriptor when MAP_ANONYMOUS is set.
This should fix recent LTP test regressions.

Reported by:	Scot Hetzel (swhetzel at gmail dot com)
		netchild
This commit is contained in:
Jung-uk Kim 2007-02-27 02:08:01 +00:00
parent 3ad48efa4a
commit 6a5964d385
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167048
2 changed files with 8 additions and 6 deletions
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7
sys/amd64/linux32/linux32_machdep.c
View File

@ -793,7 +793,9 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
bsd_args.prot |= PROT_READ | PROT_EXEC;
if (linux_args->fd != -1) {
/* Linux does not check file descriptor when MAP_ANONYMOUS is set. */
bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : linux_args->fd;
if (bsd_args.fd != -1) {
/*
* Linux follows Solaris mmap(2) description:
* The file descriptor fildes is opened with
@ -801,7 +803,7 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
* protection options specified.
*/
if ((error = fget(td, linux_args->fd, &fp)) != 0)
if ((error = fget(td, bsd_args.fd, &fp)) != 0)
return (error);
if (fp->f_type != DTYPE_VNODE) {
fdrop(fp, td);
@ -816,7 +818,6 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
fdrop(fp, td);
}
bsd_args.fd = linux_args->fd;
if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
/*

7
sys/i386/linux/linux_machdep.c
View File

@ -684,7 +684,9 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
bsd_args.prot |= PROT_READ | PROT_EXEC;
if (linux_args->fd != -1) {
/* Linux does not check file descriptor when MAP_ANONYMOUS is set. */
bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : linux_args->fd;
if (bsd_args.fd != -1) {
/*
* Linux follows Solaris mmap(2) description:
* The file descriptor fildes is opened with
@ -692,7 +694,7 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
* protection options specified.
*/
if ((error = fget(td, linux_args->fd, &fp)) != 0)
if ((error = fget(td, bsd_args.fd, &fp)) != 0)
return (error);
if (fp->f_type != DTYPE_VNODE) {
fdrop(fp, td);
@ -707,7 +709,6 @@ linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
fdrop(fp, td);
}
bsd_args.fd = linux_args->fd;
if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
/*