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| author | kib <kib@FreeBSD.org> | 2013-10-25 16:33:24 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-10-25 16:33:24 +0000 |
| commit | 3056ea94bbf733ca0aeeb7772efef40884382338 (patch) | |
| tree | 8cdc43bc7a031b40ce768ad7193ec70f127507b9 /sys/fs/devfs | |
| parent | f2cf20f78fcdd44d412de89a584d6d98ef5c585c (diff) | |
| download | FreeBSD-src-3056ea94bbf733ca0aeeb7772efef40884382338.zip FreeBSD-src-3056ea94bbf733ca0aeeb7772efef40884382338.tar.gz | |
MFC r256502:
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.
Approved by: re (glebius)
Diffstat (limited to 'sys/fs/devfs')
| -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) |
