mirror of
https://github.com/ceph/ceph
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42 lines
1.3 KiB
Bash
42 lines
1.3 KiB
Bash
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#!/bin/bash
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# This is a test for http://tracker.ceph.com/issues/8979 and the fallout
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# from triaging it. #8979 itself was random crashes on corrupted memory
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# due to a buffer overflow (for tickets larger than 256 bytes), further
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# inspection showed that vmalloced tickets weren't handled correctly as
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# well.
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#
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# What we are doing here is generating three huge keyrings and feeding
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# them to libceph (through 'rbd map' on a scratch image). Bad kernels
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# will crash reliably either on corrupted memory somewhere or a bad page
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# fault in scatterwalk_pagedone().
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set -ex
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function generate_keyring() {
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local user=$1
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local n=$2
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ceph-authtool -C -n client.$user --cap mon 'allow *' --gen-key /tmp/keyring-$user
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set +x # don't pollute trace with echos
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echo -en "\tcaps osd = \"allow rwx pool=rbd" >>/tmp/keyring-$user
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for i in $(seq 1 $n); do
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echo -n ", allow rwx pool=pool$i" >>/tmp/keyring-$user
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done
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echo "\"" >>/tmp/keyring-$user
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set -x
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}
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generate_keyring foo 1000 # ~25K, kmalloc
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generate_keyring bar 20000 # ~500K, vmalloc
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generate_keyring baz 300000 # ~8M, vmalloc + sg chaining
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rbd create --size 1 test
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for user in {foo,bar,baz}; do
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ceph auth import -i /tmp/keyring-$user
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DEV=$(sudo rbd map -n client.$user --keyring /tmp/keyring-$user test)
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sudo rbd unmap $DEV
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done
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