2024-03-23 07:24:07

by Bharath SM

[permalink] [raw]
Subject: [PATCH] Bluetooth: Fix unused value warning in sco_sock_connect

Coverity complains of an unused value:

CID 1528147: (#1 of 1): Unused value (UNUSED_VALUE)
assigned_value: Assigning value -22 to err here, but that stored
value is overwritten before it can be used.
err = -EINVAL;

Fix it by removing the assignment.

Signed-off-by: Bharath SM <[email protected]>
---
net/bluetooth/sco.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 43daf965a01e..e74bce4e1d6c 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -581,9 +581,6 @@ static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
return -EBADFD;

- if (sk->sk_type != SOCK_SEQPACKET)
- err = -EINVAL;
-
lock_sock(sk);
/* Set destination address and psm */
bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
--
2.34.1



2024-03-23 07:57:44

by bluez.test.bot

[permalink] [raw]
Subject: RE: Bluetooth: Fix unused value warning in sco_sock_connect

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=837516

---Test result---

Test Summary:
CheckPatch FAIL 0.86 seconds
GitLint FAIL 5.92 seconds
SubjectPrefix PASS 0.12 seconds
BuildKernel PASS 27.45 seconds
CheckAllWarning PASS 30.47 seconds
CheckSparse WARNING 35.92 seconds
CheckSmatch WARNING 98.49 seconds
BuildKernel32 PASS 26.98 seconds
TestRunnerSetup PASS 507.22 seconds
TestRunner_l2cap-tester PASS 19.19 seconds
TestRunner_iso-tester FAIL 34.61 seconds
TestRunner_bnep-tester PASS 4.80 seconds
TestRunner_mgmt-tester PASS 115.96 seconds
TestRunner_rfcomm-tester PASS 7.45 seconds
TestRunner_sco-tester PASS 14.92 seconds
TestRunner_ioctl-tester PASS 7.76 seconds
TestRunner_mesh-tester PASS 5.92 seconds
TestRunner_smp-tester PASS 6.84 seconds
TestRunner_userchan-tester PASS 5.02 seconds
IncrementalBuild PASS 25.84 seconds

Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script
Output:
Bluetooth: Fix unused value warning in sco_sock_connect
WARNING: From:/Signed-off-by: email address mismatch: 'From: Bharath SM <[email protected]>' != 'Signed-off-by: Bharath SM <[email protected]>'

total: 0 errors, 1 warnings, 0 checks, 9 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.

/github/workspace/src/src/13600542.patch has style problems, please review.

NOTE: Ignored message types: UNKNOWN_COMMIT_ID

NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.


##############################
Test: GitLint - FAIL
Desc: Run gitlint
Output:
Bluetooth: Fix unused value warning in sco_sock_connect

WARNING: I3 - ignore-body-lines: gitlint will be switching from using Python regex 'match' (match beginning) to 'search' (match anywhere) semantics. Please review your ignore-body-lines.regex option accordingly. To remove this warning, set general.regex-style-search=True. More details: https://jorisroovers.github.io/gitlint/configuration/#regex-style-search
8: B3 Line contains hard tab characters (\t): " err = -EINVAL;"
##############################
Test: CheckSparse - WARNING
Desc: Run sparse tool with linux kernel
Output:
net/bluetooth/sco.c: note: in included file:./include/net/bluetooth/hci_core.h:150:35: warning: array of flexible structures
##############################
Test: CheckSmatch - WARNING
Desc: Run smatch tool with source
Output:
net/bluetooth/sco.c: note: in included file:./include/net/bluetooth/hci_core.h:150:35: warning: array of flexible structures
##############################
Test: TestRunner_iso-tester - FAIL
Desc: Run iso-tester with test-runner
Output:
Total: 117, Passed: 116 (99.1%), Failed: 1, Not Run: 0

Failed Test Cases
ISO Connect2 Suspend - Success Failed 6.228 seconds


---
Regards,
Linux Bluetooth

2024-03-23 09:51:51

by Pauli Virtanen

[permalink] [raw]
Subject: Re: [PATCH] Bluetooth: Fix unused value warning in sco_sock_connect

Hi,

la, 2024-03-23 kello 12:52 +0530, Bharath SM kirjoitti:
> Coverity complains of an unused value:
>
> CID 1528147: (#1 of 1): Unused value (UNUSED_VALUE)
> assigned_value: Assigning value -22 to err here, but that stored
> value is overwritten before it can be used.
> err = -EINVAL;
>
> Fix it by removing the assignment.
>
> Signed-off-by: Bharath SM <[email protected]>
> ---
> net/bluetooth/sco.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
> index 43daf965a01e..e74bce4e1d6c 100644
> --- a/net/bluetooth/sco.c
> +++ b/net/bluetooth/sco.c
> @@ -581,9 +581,6 @@ static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen
> if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
> return -EBADFD;
>
> - if (sk->sk_type != SOCK_SEQPACKET)
> - err = -EINVAL;
> -

It should return -EINVAL here, not remove the check.

Looks like it got broken in 9a8ec9e8ebb5a7c0cfbce2d6b4a6b67b2b78e8f3 in
the locking refactoring.

> lock_sock(sk);
> /* Set destination address and psm */
> bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);

--
Pauli Virtanen