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| author | Stefano Brivio <sbrivio@redhat.com> | 2024-04-11 17:48:23 +0200 |
|---|---|---|
| committer | Stefano Brivio <sbrivio@redhat.com> | 2024-04-19 11:15:27 +0200 |
| commit | ee338a256ee8dff064fd3920a2efe642ef1d3cfa (patch) | |
| tree | 3b095ced1ff29ea9a872d0e8408a1fe523bb5561 /passt.h | |
| parent | 5d5208b67d4e4dfb4098495620591c73ac3de50d (diff) | |
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pasta, util: Align stack area for clones to maximum natural alignment
Given that we use this stack pointer as a location to store arbitrary
data types from the cloned process, we need to guarantee that its
alignment matches any of those possible data types.
runsisi reports that pasta gets a SIGBUS in pasta_open_ns() on
aarch64, where the alignment requirement for stack pointers is a
16 bytes (same as the size of a long double), and similar requirements
actually apply to most architectures we run on.
Reported-by: runsisi <runsisi@hust.edu.cn>
Link: https://bugs.passt.top/show_bug.cgi?id=85
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'passt.h')
0 files changed, 0 insertions, 0 deletions