diff options
| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_missing/host_missing/accel_missing/2825.toml | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.tar.gz qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.zip | |
gitlab scraper: download in toml and text format
Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/2825.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/2825.toml | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2825.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2825.toml deleted file mode 100644 index 787cc70b2..000000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/2825.toml +++ /dev/null @@ -1,45 +0,0 @@ -id = 2825 -title = "execveat with file descriptor and empty filename returns ENOENT when cross architectures" -state = "opened" -created_at = "2025-02-21T13:01:36.698Z" -closed_at = "n/a" -labels = [] -url = "https://gitlab.com/qemu-project/qemu/-/issues/2825" -host-os = "Debian 12" -host-arch = "x86" -qemu-version = "9.2.0" -guest-os = "n/a" -guest-arch = "n/a" -description = """On my x86_64 debian host (with binfmt_misc configured), when calling execveat with a fd , and empty pathname "", and flag AT_EMPTY_PATH. Then only x86_64 and x86 can be called normally, while programs of other architectures (arm64, arm, riscv64, etc.) will return ENOENT errors. - -I first encountered this problem when trying to run lxc-attach with qemu-aarch64. Its reference is [lxc/stable-6.0/src/include/fexecve.c#L30](https://github.com/lxc/lxc/blob/stable-6.0/src/include/fexecve.c#L30), which is the implementation of the fexecve function. So I wrote a simple test and compiled it with `x86_64/aarch64-linux-gnu-gcc -static test.c -o test`. execveat works fine when running natively or using qemu-x86_64/qemu-i386. When running versions for other architectures, using AT_EMPTY_PATH will result in ENOENT (No such file or directory); use /proc/self/fd/%d as the pathname and execve, it will work fine (like the rest part of the fexecve function). If binfmt_misc is turned off and run forign architectures ver, both calls will result in ENOEXEC (Exec format error).""" -reproduce = """1. Install qemu-user and binfmt_misc. Install gcc-aarch64-linux-gnu/gcc-riscv64-linux-gnu etc. -2. Compile test.c with host gcc, then compile forign architectures ver with gcc-aarch64-linux-gnu/gcc-riscv64-linux-gnu etc. like `gcc -static test.c -o test` and `aarch64-linux-gnu-gcc -static test.c -o test-aarch64` -3. Run different versions of test -4. To disable/enable binfmt, you can `echo 0 > /proc/sys/fs/binfmt_misc/qemu-aarch64` or `echo 1 > /proc/sys/fs/binfmt_misc/qemu-aarch64` -5. Sample outputs - -``` -rrex@debian:~/Downloads$ ./test -****Running to prepare execve -fd=3 -File size: 772296 bytes - -execveat with AT_EMPTY_PATH: -**Running in execve - -execveat with fd path: /proc/self/fd/3 -**Running in execve - -rrex@debian:~/Downloads$ qemu-aarch64 ./test-aarch64 -****Running to prepare execve -fd=3 -File size: 706104 bytes - -execveat with AT_EMPTY_PATH: -!!execveat a fd failed with errno: No such file or directory - -execveat with fd path: /proc/self/fd/3 -**Running in execve -```""" -additional = """#""" |