[BLOCK] scsi_ioctl: file can be NULL from ioctl_by_bdev() (5a57be8d) · Commits · e / devices / android_kernel_teracube_emerald

block/scsi_ioctl.c

+9 −4

Original line number	Diff line number	Diff line
		@@ -190,16 +190,21 @@ static int verify_command(struct file file, unsigned char cmd)
		safe_for_write(GPCMD_SET_STREAMING),
		};
		unsigned char type = cmd_type[cmd[0]];
		int has_write_perm = 0;

		/* Anybody who can open the device can do a read-safe command */
		if (type & CMD_READ_SAFE)
		return 0;

		/*
		* file can be NULL from ioctl_by_bdev()...
		*/
		if (file)
		has_write_perm = file->f_mode & FMODE_WRITE;

		/* Write-safe commands just require a writable open.. */
		if (type & CMD_WRITE_SAFE) {
		if (file->f_mode & FMODE_WRITE)
		if ((type & CMD_WRITE_SAFE) && has_write_perm)
		return 0;
		}

		/* And root can do any command.. */
		if (capable(CAP_SYS_RAWIO))