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Roman Bolshakov 60b856dc17 scsi: target/iblock: Fix overrun in WRITE SAME emulation 
[ Upstream commit 5676234f20 ]

WRITE SAME corrupts data on the block device behind iblock if the command
is emulated. The emulation code issues (M - 1) * N times more bios than
requested, where M is the number of 512 blocks per real block size and N is
the NUMBER OF LOGICAL BLOCKS specified in WRITE SAME command. So, for a
device with 4k blocks, 7 * N more LBAs gets written after the requested
range.

The issue happens because the number of 512 byte sectors to be written is
decreased one by one while the real bios are typically from 1 to 8 512 byte
sectors per bio.

Fixes: c66ac9db8d ("[SCSI] target: Add LIO target core v4.0.0-rc6")
Cc: <stable@vger.kernel.org>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-09-16 08:22:17 +02:00
..
iscsi scsi: iscsi: set auth_protocol back to NULL if CHAP_A value is not supported 2019-07-26 09:13:56 +02:00
loopback SCSI misc on 20180815 2018-08-15 22:06:26 -07:00
sbp scsi: target: srp, vscsi, sbp, qla: use target_remove_session 2018-08-02 15:29:31 -04:00
tcm_fc scsi: tcm_fc: use target_remove_session 2018-08-02 15:29:31 -04:00
Kconfig target: don't depend on SCSI 2018-08-02 15:19:49 -06:00
Makefile
target_core_alua.c
target_core_alua.h
target_core_configfs.c scsi: target: add helper to check if dev is configured 2018-07-30 23:17:53 -04:00
target_core_device.c scsi: target: add helper to check if dev is configured 2018-07-30 23:17:53 -04:00
target_core_fabric_configfs.c scsi: target: add helper to check if dev is configured 2018-07-30 23:17:53 -04:00
target_core_fabric_lib.c
target_core_file.c
target_core_file.h
target_core_hba.c
target_core_iblock.c scsi: target/iblock: Fix overrun in WRITE SAME emulation 2019-09-16 08:22:17 +02:00
target_core_iblock.h scsi: target/core: Use the SECTOR_SHIFT constant 2019-09-16 08:22:16 +02:00
target_core_internal.h scsi: target: Fold core_tmr_handle_tas_abort() into transport_cmd_finish_abort() 2018-07-02 16:44:31 -04:00
target_core_pr.c
target_core_pr.h
target_core_pscsi.c
target_core_pscsi.h
target_core_rd.c
target_core_rd.h
target_core_sbc.c scsi: target: Use config_item_name() instead of open-coding it 2018-07-02 16:44:30 -04:00
target_core_spc.c scsi: target: use consistent left-aligned ASCII INQUIRY data 2019-01-26 09:32:38 +01:00
target_core_stat.c
target_core_tmr.c scsi: target: Fold core_tmr_handle_tas_abort() into transport_cmd_finish_abort() 2018-07-02 16:44:31 -04:00
target_core_tpg.c
target_core_transport.c scsi: target/core: Use kmem_cache_free() instead of kfree() 2019-02-23 09:07:26 +01:00
target_core_ua.c scsi: target: Remove se_dev_entry.ua_count 2018-07-02 16:44:32 -04:00
target_core_ua.h scsi: target: Fix handling of removed LUNs 2018-07-02 16:44:32 -04:00
target_core_user.c scsi: target: tcmu: avoid use-after-free after command timeout 2019-09-10 10:33:45 +01:00
target_core_xcopy.c scsi: target/core: Make sure that target_wait_for_sess_cmds() waits long enough 2019-01-26 09:32:38 +01:00
target_core_xcopy.h