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| author | Fuqian Huang <huangfq.daxian@gmail.com> | 2019-04-18 12:35:57 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 11:58:56 +0200 |
| commit | 29973f8a88b001ebc605c88cdee124f7256ecdbf (patch) | |
| tree | 8606f14cb8e4a3c6f186d8e049f15266be01c59e | |
| parent | 8daa89e099708db1ffc694c812cb3c0737f1e22b (diff) | |
| download | linux-29973f8a88b001ebc605c88cdee124f7256ecdbf.tar.bz2 | |
tty: rocket: Remove RCPK_GET_STRUCT ioctl
If the cmd is RCPK_GET_STRUCT, copy_to_user will copy
info to user space. As info->port.ops is the address of
a constant object rocket_port_ops (assigned in init_r_port),
a kernel address leakage happens.
Remove the RCPK_GET_STRUCT ioctl.
Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/rocket.c | 4 | ||||
| -rw-r--r-- | drivers/tty/rocket.h | 1 |
2 files changed, 0 insertions, 5 deletions
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index b121d8f8f3d7..b6543e28bd8b 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -1283,10 +1283,6 @@ static int rp_ioctl(struct tty_struct *tty, return -ENXIO; switch (cmd) { - case RCKP_GET_STRUCT: - if (copy_to_user(argp, info, sizeof (struct r_port))) - ret = -EFAULT; - break; case RCKP_GET_CONFIG: ret = get_config(info, argp); break; diff --git a/drivers/tty/rocket.h b/drivers/tty/rocket.h index d0560203f215..d62ed6587f32 100644 --- a/drivers/tty/rocket.h +++ b/drivers/tty/rocket.h @@ -71,7 +71,6 @@ struct rocket_version { /* * Rocketport ioctls -- "RP" */ -#define RCKP_GET_STRUCT 0x00525001 #define RCKP_GET_CONFIG 0x00525002 #define RCKP_SET_CONFIG 0x00525003 #define RCKP_GET_PORTS 0x00525004 |