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| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2016-05-10 18:39:54 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2016-05-10 18:39:54 +0000 |
| commit | 869ce5a1007a9d00bbac5121d825c80be70f9dde (patch) | |
| tree | 26cd16954837176d7032fd1841853c34c5b32f99 /bin/ln | |
| parent | 24ed245ec22671d3d288d52c91f39a81a24637bf (diff) | |
SROP mitigation. sendsig() stores a (per-process ^ &sigcontext) cookie
inside the sigcontext. sigreturn(2) checks syscall entry was from the
exact PC addr in the (per-process ASLR) sigtramp, verifies the cookie,
and clears it to prevent sigcontext reuse.
not yet tested on landisk, sparc, *88k, socppc.
ok kettenis
Diffstat (limited to 'bin/ln')
0 files changed, 0 insertions, 0 deletions