kernel ulong and compat_ulong_t may not be same width. Use type directly to eliminate mismatches. This would result in truncation rather than EFBIG for 32bit mode for large disks. Signed-off-by: Khazhismel Kumykov <khazhy@xxxxxxxxxx> --- block/compat_ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 6ca015f92766..3a2c77f07da8 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -388,7 +388,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) return 0; case BLKGETSIZE: size = i_size_read(bdev->bd_inode); - if ((size >> 9) > ~0UL) + if ((size >> 9) > ~((compat_ulong_t)0UL)) return -EFBIG; return compat_put_ulong(arg, size >> 9); -- 2.17.0.484.g0c8726318c-goog
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