From: David Disseldorp <ddiss@suse.de>
To: target-devel@vger.kernel.org
Subject: [PATCH 2/3] target: fix SendTargets=All string compares
Date: Thu, 12 Sep 2019 09:55:46 +0000 [thread overview]
Message-ID: <20190912095547.22427-3-ddiss@suse.de> (raw)
strncmp is currently used for "SendTargets" key and "All" value matching
without checking for trailing garbage. This means that Text request PDUs
with garbage such as "SendTargetsPlease=All" and "SendTargets=Alle" are
processed successfully as if they were "SendTargets=All" requests.
Signed-off-by: David Disseldorp <ddiss@suse.de>
---
drivers/target/iscsi/iscsi_target.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d19e051f2bc2..09e55ea0bf5d 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -2189,24 +2189,22 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
goto empty_sendtargets;
}
- if (strncmp("SendTargets", text_in, 11) != 0) {
+ if (strncmp("SendTargets=", text_in, 12) != 0) {
pr_err("Received Text Data that is not"
" SendTargets, cannot continue.\n");
goto reject;
}
+ /* '=' confirmed in strncmp */
text_ptr = strchr(text_in, '=');
- if (!text_ptr) {
- pr_err("No \"=\" separator found in Text Data,"
- " cannot continue.\n");
- goto reject;
- }
- if (!strncmp("=All", text_ptr, 4)) {
+ BUG_ON(!text_ptr);
+ if (!strncmp("=All", text_ptr, 5)) {
cmd->cmd_flags |= ICF_SENDTARGETS_ALL;
} else if (!strncmp("=iqn.", text_ptr, 5) ||
!strncmp("=eui.", text_ptr, 5)) {
cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE;
} else {
- pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
+ pr_err("Unable to locate valid SendTargets%s value\n",
+ text_ptr);
goto reject;
}
--
2.16.4
next reply other threads:[~2019-09-12 9:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 9:55 David Disseldorp [this message]
2019-10-02 17:09 ` [PATCH 2/3] target: fix SendTargets=All string compares Mike Christie
2019-10-21 3:18 ` David Disseldorp
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