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| author | Vivian Wang <uwu@dram.page> | 2024-07-23 18:05:45 +0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2024-07-30 07:59:23 +1000 |
| commit | 25268a18550323f6babbcc260838fa09941e5c85 (patch) | |
| tree | 157eec75ba42209af3d7613e3247909576747649 /linux-user/main.c | |
| parent | 22531d8cc58f390986e7070eca5d1628aa7b2fe0 (diff) | |
| download | focaccia-qemu-25268a18550323f6babbcc260838fa09941e5c85.tar.gz focaccia-qemu-25268a18550323f6babbcc260838fa09941e5c85.zip | |
linux-user/main: Check errno when getting AT_EXECFD
It's possible for AT_EXECFD to end up with a valid value of 0. Check
errno when using qemu_getauxval instead of return value to handle this
case.
Not handling this case leads to a confusing condition where the
executable ends up as fd 0, i.e. stdin.
Signed-off-by: Vivian Wang <uwu@dram.page>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Fixes: 0b959cf5e4cc ("linux-user: Use qemu_getauxval for AT_EXECFD")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2448
Message-ID: <20240723100545.405476-3-uwu@dram.page>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 7d3cf45fa9..8143a0d4b0 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -755,8 +755,9 @@ int main(int argc, char **argv, char **envp) /* * Manage binfmt-misc open-binary flag */ + errno = 0; execfd = qemu_getauxval(AT_EXECFD); - if (execfd == 0) { + if (errno != 0) { execfd = open(exec_path, O_RDONLY); if (execfd < 0) { printf("Error while loading %s: %s\n", exec_path, strerror(errno)); |