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| author | Dmitry Bogdanov <d.bogdanov@yadro.com> | 2023-03-19 04:56:17 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-03-25 00:32:23 +0300 |
| commit | d8990b5a4d065f38f35d69bcd627ec5a7f8330ca (patch) | |
| tree | 6c8ca774f7f72860a75b95884c233aa3c10cb5cd /drivers/target | |
| parent | 395cee83d02de3073211b04fc85724f4abc663ad (diff) | |
| download | linux-d8990b5a4d065f38f35d69bcd627ec5a7f8330ca.tar.xz | |
scsi: target: iscsit: Free cmds before session free
Commands from recovery entries are freed after session has been closed.
That leads to use-after-free at command free or NPE with such call trace:
Time2Retain timer expired for SID: 1, cleaning up iSCSI session.
BUG: kernel NULL pointer dereference, address: 0000000000000140
RIP: 0010:sbitmap_queue_clear+0x3a/0xa0
Call Trace:
target_release_cmd_kref+0xd1/0x1f0 [target_core_mod]
transport_generic_free_cmd+0xd1/0x180 [target_core_mod]
iscsit_free_cmd+0x53/0xd0 [iscsi_target_mod]
iscsit_free_connection_recovery_entries+0x29d/0x320 [iscsi_target_mod]
iscsit_close_session+0x13a/0x140 [iscsi_target_mod]
iscsit_check_post_dataout+0x440/0x440 [iscsi_target_mod]
call_timer_fn+0x24/0x140
Move cleanup of recovery enrties to before session freeing.
Reported-by: Forza <forza@tnonline.net>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230319015620.96006-7-michael.christie@oracle.com
Reviewed-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 83b007141229..26634dbea9b8 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -4529,6 +4529,9 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep) iscsit_stop_time2retain_timer(sess); spin_unlock_bh(&se_tpg->session_lock); + if (sess->sess_ops->ErrorRecoveryLevel == 2) + iscsit_free_connection_recovery_entries(sess); + /* * transport_deregister_session_configfs() will clear the * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context @@ -4552,9 +4555,6 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep) transport_deregister_session(sess->se_sess); - if (sess->sess_ops->ErrorRecoveryLevel == 2) - iscsit_free_connection_recovery_entries(sess); - iscsit_free_all_ooo_cmdsns(sess); spin_lock_bh(&se_tpg->session_lock); |