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authorRich Felker <dalias@aerifal.cx>2014-07-17 22:01:52 -0400
committerRich Felker <dalias@aerifal.cx>2014-07-17 22:01:52 -0400
commit7bece9c2095ee81f14b1088f6b0ba2f37fecb283 (patch)
tree2d1b7602c410829163adc83a647f3d656186d9e8 /src/ldso
parent5cc187215681c2fc1563ad5136c389249aa3f70e (diff)
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provide getauxval(AT_SECURE) even if it is missing from the aux vector
this could happen on 2.4-series linux kernels that predate AT_SECURE
and possibly on other kernels that are emulating the linux syscall API
but not providing AT_SECURE in the aux vector at startup.

in principle applications should be checking errno anyway, but this
does not really work. to be secure, the caller would have to treat
ENOENT (indeterminate result) as possibly-suid and thereby disable
functionality in the typical non-suid usage case. and since glibc only
runs on kernels that provide AT_SECURE, applications written to the
glibc getauxval API might simply assume it succeeds.
Diffstat (limited to 'src/ldso')
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