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RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.com:email,suse.com:mid]; TO_DN_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; URIBL_BLOCKED(0.00)[suse.de:dkim,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.com:email,suse.com:mid]; DKIM_TRACE(0.00)[suse.de:+] X-Virus-Scanned: clamav-milter 1.0.9 at in-5.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v2 08/33] keyctl16: Test KEYCTL_GET_SECURITY truncated copy X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" From: Andrea Cervesato Test KEYCTL_GET_SECURITY truncated copy behavior: verify that calling with a 1-byte buffer receives exactly one byte while the return value still reports the full label length. Signed-off-by: Andrea Cervesato --- runtest/syscalls | 1 + testcases/kernel/syscalls/keyctl/.gitignore | 1 + testcases/kernel/syscalls/keyctl/keyctl16.c | 74 +++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+) diff --git a/runtest/syscalls b/runtest/syscalls index da901baae..89c8a95af 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -733,6 +733,7 @@ keyctl12 keyctl12 keyctl13 keyctl13 keyctl14 keyctl14 keyctl15 keyctl15 +keyctl16 keyctl16 kcmp01 kcmp01 kcmp02 kcmp02 diff --git a/testcases/kernel/syscalls/keyctl/.gitignore b/testcases/kernel/syscalls/keyctl/.gitignore index 852fee4ea..c351716d0 100644 --- a/testcases/kernel/syscalls/keyctl/.gitignore +++ b/testcases/kernel/syscalls/keyctl/.gitignore @@ -13,3 +13,4 @@ /keyctl13 /keyctl14 /keyctl15 +/keyctl16 diff --git a/testcases/kernel/syscalls/keyctl/keyctl16.c b/testcases/kernel/syscalls/keyctl/keyctl16.c new file mode 100644 index 000000000..f5662e326 --- /dev/null +++ b/testcases/kernel/syscalls/keyctl/keyctl16.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2026 Andrea Cervesato + */ + +/*\ + * Test ``KEYCTL_GET_SECURITY`` truncated copy of :manpage:`keyctl(2)`. + * + * ``KEYCTL_GET_SECURITY`` returns the full length of the label, but unlike + * ``KEYCTL_DESCRIBE`` the kernel performs a truncated copy when the user + * buffer is too small. + * + * [Algorithm] + * + * - verify a one byte buffer receives exactly one byte while the full + * length is still returned + */ + +#include "keyctl_common.h" + +#define KEY_DESC "ltpkeyctl16" +#define PAYLOAD "payload" +#define BUF_SIZE 128 + +static key_serial_t key; +static long sec_len; +static char buf[BUF_SIZE]; + +static void setup(void) +{ + SAFE_KEYCTL(KEYCTL_JOIN_SESSION_KEYRING, 0, 0, 0, 0); + + key = new_user_key(KEY_DESC, PAYLOAD, sizeof(PAYLOAD), + KEY_SPEC_PROCESS_KEYRING); + SAFE_KEYCTL(KEYCTL_SETPERM, key, KEY_PERM_SET, 0, 0); + + TEST(keyctl(KEYCTL_GET_SECURITY, key, (unsigned long)NULL, 0, 0)); + if (TST_RET < 0) + tst_brk(TBROK | TTERRNO, "KEYCTL_GET_SECURITY failed"); + + sec_len = TST_RET; +} + +static void run(void) +{ + size_t i; + + memset(buf, 0xAA, sizeof(buf)); + TST_EXP_EQ_LI_SILENT(keyctl(KEYCTL_GET_SECURITY, key, + (unsigned long)buf, 1, 0), sec_len); + if (!TST_PASS) + return; + + if (buf[0] == (char)0xAA) { + tst_res(TFAIL, "nothing was copied into the buffer"); + return; + } + + for (i = 1; i < sizeof(buf); i++) { + if (buf[i] != (char)0xAA) { + tst_res(TFAIL, "copy overran the buffer at offset %zu", + i); + return; + } + } + + tst_res(TPASS, "exactly one byte copied, full length %ld returned", + sec_len); +} + +static struct tst_test test = { + .setup = setup, + .test_all = run, +}; -- 2.51.0 -- Mailing list info: https://lists.linux.it/listinfo/ltp