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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/1729.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/1729.toml | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/1729.toml b/gitlab/issues/target_missing/host_missing/accel_missing/1729.toml deleted file mode 100644 index 302c093f3..000000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/1729.toml +++ /dev/null @@ -1,55 +0,0 @@ -id = 1729 -title = "mremap fails with EFAULT if address range overlaps with stack guard" -state = "closed" -created_at = "2023-06-25T06:50:48.249Z" -closed_at = "2024-10-20T22:02:11.370Z" -labels = ["linux-user"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1729" -host-os = "any linux" -host-arch = "x86_64" -qemu-version = "any version" -guest-os = "alpine-linux" -guest-arch = "ARM 32-bit" -description = """When running 32-bit user-static on 64-bit host, `mremap` behave differently from the kernel. This difference let programs that call `pthread_getattr_np` on musl-libc to run into a loop on repeated calling `mremap`. - -https://git.musl-libc.org/cgit/musl/plain/src/thread/pthread_getattr_np.c - -``` c -\t\twhile (mremap(p-l-PAGE_SIZE, PAGE_SIZE, 2*PAGE_SIZE, 0)==MAP_FAILED && errno==ENOMEM) -\t\t\tl += PAGE_SIZE; -```""" -reproduce = """Compile the following program against musl-libc arm 32-bit, and run it in qemu-user-static on x86_64 host. - -``` c -#define _GNU_SOURCE -#include <pthread.h> - -int main(int argc, char *argv[]) { -\tpthread_attr_t attr; -\treturn pthread_getattr_np(pthread_self(), &attr); -} -``` - -For example, on x86_64 fedora 38 with podman and qemu-user-static installed, we can reproduce this with alpine container: - -``` -$ podman run --rm -it --arch arm/v7 docker.io/library/alpine:latest - -/ # apk add alpine-sdk - -...... - -/ # cat test.c -#define _GNU_SOURCE -#include <pthread.h> - -int main(int argc, char *argv[]) { -\tpthread_attr_t attr; -\treturn pthread_getattr_np(pthread_self(), &attr); -} - -/ # gcc test.c - -/ # ./a.out -```""" -additional = """Original thread on musl mail list where this was initially reported: https://www.openwall.com/lists/musl/2017/06/15/9""" |