{"id":2227172,"url":"http://patchwork.ozlabs.org/api/patches/2227172/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/patch/20260423095834.11932-8-chrubis@suse.cz/","project":{"id":59,"url":"http://patchwork.ozlabs.org/api/projects/59/?format=json","name":"Linux Test Project development","link_name":"ltp","list_id":"ltp.lists.linux.it","list_email":"ltp@lists.linux.it","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260423095834.11932-8-chrubis@suse.cz>","list_archive_url":null,"date":"2026-04-23T09:58:33","name":"[7/8] syscalls: Add epoll_wait12","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"f4e22a55a977444a502ab4ae92da8a7825d376a6","submitter":{"id":8530,"url":"http://patchwork.ozlabs.org/api/people/8530/?format=json","name":"Cyril Hrubis","email":"chrubis@suse.cz"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/ltp/patch/20260423095834.11932-8-chrubis@suse.cz/mbox/","series":[{"id":501170,"url":"http://patchwork.ozlabs.org/api/series/501170/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/list/?series=501170","date":"2026-04-23T09:58:26","name":"Add more epoll tests","version":1,"mbox":"http://patchwork.ozlabs.org/series/501170/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227172/comments/","check":"warning","checks":"http://patchwork.ozlabs.org/api/patches/2227172/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256\n header.s=susede2_rsa header.b=jeLFO+Ip;\n\tdkim=fail reason=\"signature verification failed\" header.d=suse.cz\n header.i=@suse.cz header.a=ed25519-sha256 header.s=susede2_ed25519\n header.b=UnVBP4OI;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key)\n header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256 header.s=susede2_rsa\n header.b=jeLFO+Ip;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=UnVBP4OI;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "},"content":"A test for EPOLLERR when we are waiting to write into a pipe and the\nread end is closed.\n\nSigned-off-by: Cyril Hrubis \n---\n runtest/syscalls | 1 +\n .../kernel/syscalls/epoll_wait/.gitignore | 1 +\n .../kernel/syscalls/epoll_wait/epoll_wait12.c | 112 ++++++++++++++++++\n 3 files changed, 114 insertions(+)\n create mode 100644 testcases/kernel/syscalls/epoll_wait/epoll_wait12.c","diff":"diff --git a/runtest/syscalls b/runtest/syscalls\nindex d286ab7ff..0200a9e13 100644\n--- a/runtest/syscalls\n+++ b/runtest/syscalls\n@@ -199,6 +199,7 @@ epoll_wait07 epoll_wait07\n epoll_wait09 epoll_wait09\n epoll_wait10 epoll_wait10\n epoll_wait11 epoll_wait11\n+epoll_wait12 epoll_wait12\n \n epoll_pwait01 epoll_pwait01\n epoll_pwait02 epoll_pwait02\ndiff --git a/testcases/kernel/syscalls/epoll_wait/.gitignore b/testcases/kernel/syscalls/epoll_wait/.gitignore\nindex 57bdf0806..ad890d077 100644\n--- a/testcases/kernel/syscalls/epoll_wait/.gitignore\n+++ b/testcases/kernel/syscalls/epoll_wait/.gitignore\n@@ -9,3 +9,4 @@ epoll_wait08\n epoll_wait09\n epoll_wait10\n epoll_wait11\n+epoll_wait12\ndiff --git a/testcases/kernel/syscalls/epoll_wait/epoll_wait12.c b/testcases/kernel/syscalls/epoll_wait/epoll_wait12.c\nnew file mode 100644\nindex 000000000..facbf60c2\n--- /dev/null\n+++ b/testcases/kernel/syscalls/epoll_wait/epoll_wait12.c\n@@ -0,0 +1,112 @@\n+// SPDX-License-Identifier: GPL-2.0-or-later\n+/*\n+ * Copyright (c) Linux Test Project, 2026\n+ */\n+\n+/*\\\n+ * Verify that epoll_wait reports EPOLLERR when the read end of a pipe is\n+ * closed while a child process is blocked in epoll_wait on the write end.\n+ *\n+ * [Algorithm]\n+ *\n+ * - Create a pipe and fill it completely so the write end is not writable.\n+ * - Register the write end with an epoll instance for EPOLLOUT.\n+ * - Fork a child that closes its copy of the read end and blocks in\n+ * epoll_wait waiting for the pipe to become writable.\n+ * - Parent waits for the child to enter sleep state, then closes the read\n+ * end.\n+ * - The child's epoll_wait should return with EPOLLERR set.\n+ */\n+\n+#include \n+#include \n+\n+#include \"tst_test.h\"\n+#include \"tst_epoll.h\"\n+\n+static int efd = -1, fds[2] = {-1, -1};\n+\n+static void fill_pipe(int fd)\n+{\n+\tchar buf[4096];\n+\tstruct pollfd pfd = {.fd = fd, .events = POLLOUT};\n+\tint nfd;\n+\n+\tmemset(buf, 'a', sizeof(buf));\n+\n+\tdo {\n+\t\tSAFE_WRITE(SAFE_WRITE_ANY, fd, buf, sizeof(buf));\n+\t\tnfd = poll(&pfd, 1, 0);\n+\t\tif (nfd == -1)\n+\t\t\ttst_brk(TBROK | TERRNO, \"poll()\");\n+\t} while (nfd > 0);\n+}\n+\n+static void run(void)\n+{\n+\tpid_t pid;\n+\n+\tSAFE_PIPE(fds);\n+\tfill_pipe(fds[1]);\n+\n+\tefd = SAFE_EPOLL_CREATE1(0);\n+\n+\tstruct epoll_event ev = {\n+\t\t.events = EPOLLOUT,\n+\t\t.data.fd = fds[1],\n+\t};\n+\n+\tSAFE_EPOLL_CTL(efd, EPOLL_CTL_ADD, fds[1], &ev);\n+\n+\tpid = SAFE_FORK();\n+\tif (!pid) {\n+\t\tSAFE_CLOSE(fds[0]);\n+\n+\t\tTEST(epoll_wait(efd, &ev, 1, 5000));\n+\t\tif (TST_RET != 1) {\n+\t\t\ttst_res(TFAIL | TTERRNO,\n+\t\t\t\t\"epoll_wait() returned %li, expected 1\",\n+\t\t\t\tTST_RET);\n+\t\t\texit(0);\n+\t\t}\n+\n+\t\tif (ev.data.fd != fds[1]) {\n+\t\t\ttst_res(TFAIL, \"epoll.data.fd %d, expected %d\",\n+\t\t\t\tev.data.fd, fds[1]);\n+\t\t\texit(0);\n+\t\t}\n+\n+\t\tif (!(ev.events & EPOLLERR)) {\n+\t\t\ttst_res(TFAIL, \"events %x, EPOLLERR not set\",\n+\t\t\t\tev.events);\n+\t\t\texit(0);\n+\t\t}\n+\n+\t\ttst_res(TPASS,\n+\t\t\t\"epoll_wait() reported EPOLLERR on broken pipe\");\n+\t\texit(0);\n+\t}\n+\n+\tTST_PROCESS_STATE_WAIT(pid, 'S', 0);\n+\tSAFE_CLOSE(fds[0]);\n+\tSAFE_CLOSE(fds[1]);\n+\tSAFE_CLOSE(efd);\n+}\n+\n+static void cleanup(void)\n+{\n+\tif (fds[1] > 0)\n+\t\tSAFE_CLOSE(fds[1]);\n+\n+\tif (fds[0] > 0)\n+\t\tSAFE_CLOSE(fds[0]);\n+\n+\tif (efd > 0)\n+\t\tSAFE_CLOSE(efd);\n+}\n+\n+static struct tst_test test = {\n+\t.test_all = run,\n+\t.cleanup = cleanup,\n+\t.forks_child = 1,\n+};\n","prefixes":["7/8"]}