scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress

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[ Upstream commit f484a794e4 ]

If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails,
userspace could be accessing the host's ipaddress attr. If we then free the
session via iscsi_session_teardown() while userspace is still accessing the
session we will hit a use after free bug.

Set the tcp_sw_host->session after we have completed session creation and
can no longer fail.

Link: https://lore.kernel.org/r/20230117193937.21244-3-michael.christie@oracle.com
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Acked-by: Ding Hui <dinghui@sangfor.com.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Mike Christie 2023-01-17 13:39:37 -06:00 • committed by Greg Kroah-Hartman

parent 8859687f5b

commit 61e43ebfd2

1 changed files with 6 additions and 3 deletions

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drivers/scsi/iscsi_tcp.c

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