diff options
| author | kib <kib@FreeBSD.org> | 2013-10-15 06:33:10 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-10-15 06:33:10 +0000 |
| commit | 3dc87905fa8340ae8086229b208923194531bf8b (patch) | |
| tree | fa02194acb671d12f7143578c594ebaf0287c4a0 /sys/fs | |
| parent | 58fc49ff4fd8e6e307314c92f73c8fb69773d58a (diff) | |
| download | FreeBSD-src-3dc87905fa8340ae8086229b208923194531bf8b.zip FreeBSD-src-3dc87905fa8340ae8086229b208923194531bf8b.tar.gz | |
Similar to debug.iosize_max_clamp sysctl, introduce
devfs_iosize_max_clamp sysctl, which allows/disables SSIZE_MAX-sized
i/o requests on the devfs files.
Sponsored by: The FreeBSD Foundation
Reminded by: Dmitry Sivachenko <trtrmitya@gmail.com>
MFC after: 1 week
Diffstat (limited to 'sys/fs')
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index dcc10c87..a05299a 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -1178,6 +1178,8 @@ devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred, struct cdevsw *dsw; struct file *fpop; + if (uio->uio_resid > DEVFS_IOSIZE_MAX) + return (EINVAL); fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error) @@ -1653,6 +1655,8 @@ devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred, struct cdevsw *dsw; struct file *fpop; + if (uio->uio_resid > DEVFS_IOSIZE_MAX) + return (EINVAL); fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error) |
