linux-kernel - Re: selftests: clone3: clone3_cap_checkpoint_restore fails

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Date: Fri, 24 May 2024 10:59:03 +0000
From: Khannanov Lenar <Lenar.Khannanov@...otecs.ru>
To: "naresh.kamboju@...aro.org" <naresh.kamboju@...aro.org>
CC: "brauner@...nel.org" <brauner@...nel.org>, "fweimer@...hat.com"
	<fweimer@...hat.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-kselftest@...r.kernel.org"
	<linux-kselftest@...r.kernel.org>, "lkft-triage@...ts.linaro.org"
	<lkft-triage@...ts.linaro.org>, "shuah@...nel.org" <shuah@...nel.org>,
	Gavrilov Ilia <Ilia.Gavrilov@...otecs.ru>
Subject: Re: selftests: clone3: clone3_cap_checkpoint_restore fails - Could
 not set CAP_CHECKPOINT_RESTORE


I presume that test fails because of the difference between definition of struct _cap_struct (struct libcap in test). Commit aca076443591 (Make cap_t operations thread safe.) introduces mutex field at the beginning of the structure. Test uses own definition to set CAP_CHECKPOINT_RESTORE. As data member of these two versions of structures is at the different offsets, CAP_CHECKPOINT_RESTORE is lost and that's why cap_set_proc returns EPERM.


С уважением,
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