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authorRich Felker <dalias@aerifal.cx>2017-10-13 23:00:34 -0400
committerRich Felker <dalias@aerifal.cx>2017-10-13 23:00:34 -0400
commitc1e27367a9b26b9baac0f37a12349fc36567c8b6 (patch)
tree88accade820f5d320b504b517b043b951fec583e /src/math/lroundf.c
parent907476925fca05f24ebca5fcdc21f1e58ba7b313 (diff)
downloadmusl-c1e27367a9b26b9baac0f37a12349fc36567c8b6.tar.gz
fix read-after-free type error in pthread_detach
calling __unlock on t->exitlock is not valid because __unlock reads the waiters count after making the atomic store that could allow pthread_exit to continue and unmap the thread's stack and the object t points to. for now, inline the __unlock logic with an unconditional futex wake operation so that the waiters count is not needed. once __lock/__unlock have been made safe for self-synchronized destruction, we could switch back to using them.
Diffstat (limited to 'src/math/lroundf.c')
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