forked from Minki/linux
65f8da4759
The dasd_open function uses the private_data pointer of the gendisk to find the dasd_block structure that matches the gendisk. When a DASD device is set offline, we set the private_data pointer of the gendisk to NULL and later remove the dasd_block structure, but there is still a small race window, in which dasd_open could first read a pointer from the private_data field and then try to use it, after the structure has already been freed. To close this race window, we will store a pointer to the dasd_devmap structure of the base device in the private_data field. The devmap entries are not deleted, and we already have proper locking and reference counting in place, so that we can safely get from a devmap pointer to the dasd_device and dasd_block structures of the device. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| .. | ||
| dasd_3990_erp.c | ||
| dasd_alias.c | ||
| dasd_devmap.c | ||
| dasd_diag.c | ||
| dasd_diag.h | ||
| dasd_eckd.c | ||
| dasd_eckd.h | ||
| dasd_eer.c | ||
| dasd_erp.c | ||
| dasd_fba.c | ||
| dasd_fba.h | ||
| dasd_genhd.c | ||
| dasd_int.h | ||
| dasd_ioctl.c | ||
| dasd_proc.c | ||
| dasd.c | ||
| dcssblk.c | ||
| Kconfig | ||
| Makefile | ||
| xpram.c | ||