Damien Le Moal a608da3bd7 zonefs: Detect append writes at invalid locations ... Using REQ_OP_ZONE_APPEND operations for synchronous writes to sequential files succeeds regardless of the zone write pointer position, as long as the target zone is not full. This means that if an external (buggy) application writes to the zone of a sequential file underneath the file system, subsequent file write() operation will succeed but the file size will not be correct and the file will contain invalid data written by another application. Modify zonefs_file_dio_append() to check the written sector of an append write (returned in bio->bi_iter.bi_sector) and return -EIO if there is a mismatch with the file zone wp offset field. This change triggers a call to zonefs_io_error() and a zone check. Modify zonefs_io_error_cb() to not expose the unexpected data after the current inode size when the errors=remount-ro mode is used. Other error modes are correctly handled already. Fixes: 02ef12a663 ("zonefs: use REQ_OP_ZONE_APPEND for sync DIO") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>		2023-01-16 08:42:12 +09:00
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Kconfig	zonefs: select CONFIG_CRC32	2021-01-04 09:06:42 +09:00
Makefile	zonefs: Export open zone resource information through sysfs	2022-04-21 08:37:51 +09:00
super.c	zonefs: Detect append writes at invalid locations	2023-01-16 08:42:12 +09:00
sysfs.c	zonefs: Remove to_attr() helper function	2022-11-16 16:08:31 +09:00
trace.h	fs/zonefs: Use the enum req_op type for tracing request operations	2022-07-14 12:14:33 -06:00
zonefs.h	zonefs: Fix active zone accounting	2022-11-25 17:01:22 +09:00