diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/0005-tests-tcg-Check-that-shmat-does-not-break-proc-self-.patch')
-rw-r--r-- | meta/recipes-devtools/qemu/qemu/0005-tests-tcg-Check-that-shmat-does-not-break-proc-self-.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/0005-tests-tcg-Check-that-shmat-does-not-break-proc-self-.patch b/meta/recipes-devtools/qemu/qemu/0005-tests-tcg-Check-that-shmat-does-not-break-proc-self-.patch new file mode 100644 index 0000000000..5afb35ea0c --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/0005-tests-tcg-Check-that-shmat-does-not-break-proc-self-.patch @@ -0,0 +1,85 @@ +From 1234063488134ad1f541f56dd30caa7896905f06 Mon Sep 17 00:00:00 2001 +From: Ilya Leoshkevich <iii@linux.ibm.com> +Date: Wed, 28 Feb 2024 10:25:18 -1000 +Subject: [PATCH 5/5] tests/tcg: Check that shmat() does not break + /proc/self/maps + +Add a regression test for a recently fixed issue, where shmat() +desynced the guest and the host view of the address space and caused +open("/proc/self/maps") to SEGV. + +Upstream-Status: Submitted [https://www.mail-archive.com/qemu-devel@nongnu.org/msg1026793.html] + +Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> +Message-Id: <jwyuvao4apydvykmsnvacwshdgy3ixv7qvkh4dbxm3jkwgnttw@k4wpaayou7oq> +Signed-off-by: Richard Henderson <richard.henderson@linaro.org> +Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> +--- + tests/tcg/multiarch/linux/linux-shmat-maps.c | 55 ++++++++++++++++++++ + 1 file changed, 55 insertions(+) + create mode 100644 tests/tcg/multiarch/linux/linux-shmat-maps.c + +diff --git a/tests/tcg/multiarch/linux/linux-shmat-maps.c b/tests/tcg/multiarch/linux/linux-shmat-maps.c +new file mode 100644 +index 000000000..0ccf7a973 +--- /dev/null ++++ b/tests/tcg/multiarch/linux/linux-shmat-maps.c +@@ -0,0 +1,55 @@ ++/* ++ * Test that shmat() does not break /proc/self/maps. ++ * ++ * SPDX-License-Identifier: GPL-2.0-or-later ++ */ ++#include <assert.h> ++#include <fcntl.h> ++#include <stdlib.h> ++#include <sys/ipc.h> ++#include <sys/shm.h> ++#include <unistd.h> ++ ++int main(void) ++{ ++ char buf[128]; ++ int err, fd; ++ int shmid; ++ ssize_t n; ++ void *p; ++ ++ shmid = shmget(IPC_PRIVATE, 1, IPC_CREAT | 0600); ++ assert(shmid != -1); ++ ++ /* ++ * The original bug required a non-NULL address, which skipped the ++ * mmap_find_vma step, which could result in a host mapping smaller ++ * than the target mapping. Choose an address at random. ++ */ ++ p = shmat(shmid, (void *)0x800000, SHM_RND); ++ if (p == (void *)-1) { ++ /* ++ * Because we are now running the testcase for all guests for which ++ * we have a cross-compiler, the above random address might conflict ++ * with the guest executable in some way. Rather than stopping, ++ * continue with a system supplied address, which should never fail. ++ */ ++ p = shmat(shmid, NULL, 0); ++ assert(p != (void *)-1); ++ } ++ ++ fd = open("/proc/self/maps", O_RDONLY); ++ assert(fd != -1); ++ do { ++ n = read(fd, buf, sizeof(buf)); ++ assert(n >= 0); ++ } while (n != 0); ++ close(fd); ++ ++ err = shmdt(p); ++ assert(err == 0); ++ err = shmctl(shmid, IPC_RMID, NULL); ++ assert(err == 0); ++ ++ return EXIT_SUCCESS; ++} +-- +2.34.1 + |