On Mon, Jun 22, 2020 at 12:50:40PM -0400, Alexander Bulekov wrote: > We used shm_open with mmap to share libfuzzer's coverage bitmap with > child (runner) processes. The same functionality can be achieved with > MAP_SHARED | MAP_ANONYMOUS, since we do not care about naming or > permissioning the shared memory object. > > Signed-off-by: Alexander Bulekov <alx...@bu.edu> > --- > This might fix: > qemu-fuzz-i386-target-virtio-net-socket: Unexpected-exit in > counter_shm_init > https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=23636 (private link) > > oss-fuzz does not provide access to /dev/, so it is likely that shm_open > breaks, when it tries to access /dev/shm. This seems likely, based on > the oss-fuzz minijail setup: > https://github.com/google/oss-fuzz/blob/3740c751fd9edea138c17783995d370d6b1b89bc/infra/base-images/base-runner/run_minijail > > tests/qtest/fuzz/fork_fuzz.c | 40 ++++++++++++------------------------ > 1 file changed, 13 insertions(+), 27 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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