From 52f6f9d74f31078964ca1574f7bb612da7877ac8 Mon Sep 17 00:00:00 2001
From: Jann Horn <jannh@google.com>
Date: Tue, 26 Mar 2019 23:03:48 +0100
Subject: [PATCH] floppy: fix usercopy direction
Git-commit: 52f6f9d74f31078964ca1574f7bb612da7877ac8
Patch-mainline: v5.4-rc1
References: bsc#1111666
As sparse points out, these two copy_from_user() should actually be
copy_to_user().
Fixes: 229b53c9bf4e ("take floppy compat ioctls to sodding floppy.c")
Cc: stable@vger.kernel.org
Acked-by: Alexander Popov <alex.popov@linux.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/block/floppy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 0469aceaa230..485865fd0412 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3780,7 +3780,7 @@ static int compat_getdrvprm(int drive,
v.native_format = UDP->native_format;
mutex_unlock(&floppy_mutex);
- if (copy_from_user(arg, &v, sizeof(struct compat_floppy_drive_params)))
+ if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_params)))
return -EFAULT;
return 0;
}
@@ -3816,7 +3816,7 @@ static int compat_getdrvstat(int drive, bool poll,
v.bufblocks = UDRS->bufblocks;
mutex_unlock(&floppy_mutex);
- if (copy_from_user(arg, &v, sizeof(struct compat_floppy_drive_struct)))
+ if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct)))
return -EFAULT;
return 0;
Eintr:
--
2.16.4