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Add a test that issues multiple syz_usb_ep_write calls.
Update hiddev test to use a wider used hid driver.
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This commit changes syz_usb_control_io to enable the relevant endpoints
for the interface being set via a SET_INTERFACE request.
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A process with CAP_SYS_NICE can bring kernel down by asking for too high SCHED_DEADLINE priority,
as the result rcu and other system services that use kernel threads will stop functioning.
Some parameters for SCHED_DEADLINE should be OK, but we don't have means to enforce
values of indirect syscall arguments. Peter Zijlstra proposed sysctl_deadline_period_{min,max}
which could be used to enfore safe limits without droppping CAP_SYS_NICE, but we don't have it yet.
See the following bug for details:
https://groups.google.com/forum/#!topic/syzkaller-bugs/G6Wl_PKPIWI
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We only drop CAP_SYS_PTRACE for sandbox=namespace,
but it can equally affect testing with sandbox=none.
Drop it for sandbox=none, add a test.
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Running sys/*/test programs requires real machines and kernels for each OS.
We can't do that in unit tests, but at least try to deserialize these programs
so that they don't get rotten.
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Refine some consts to increase changes of correct programs.
Fix some types. Add comments and a test.
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pipe does not exist on arm64.
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It still crashes kernel, disable for now.
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Fuzzer manages to open it and do bad things with it.
Prevent it from doing so.
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For context see:
https://groups.google.com/d/msg/syzkaller-bugs/ZaBzAJbn6i8/Py9FVlAqDQAJ
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AUTO arguments can be used for:
- consts
- lens
- pointers
For const's and len's AUTO is replaced with the natural value,
addresses for AUTO pointers are allocated linearly.
This greatly simplifies writing test programs by hand
as most of the time we want these natural values.
Update tests to use AUTO.
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1. Create per-proc cgroup in executor.
2. Setup cgroups after chdir into test dir
(it assumes relative paths against test dir).
3. Add test.
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We forgot to mount binfmt_misc. Mount it. Add a test.
Increase per-call timeout, otherwise last execve timesout.
Fix csource waiting for call completion at the end of program.
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Turns out dirs can be immutable too.
Update #650
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Fixes #650
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Support checking "blocked"/"unfinished" flags for calls.
Support test constanints, e.g. "requires: threaded" or "requires: -sandbox=setuid".
Some improvements in tools/syz-runtest.
Update #603
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If the test process is not dying after 100ms,
abort all fuse connections in the system.
This gets rid at least of simple fuse deadlocks,
let's see how well this works in all cases.
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The tool is run as:
$ syz-runtest -config manager.config
This runs all programs from sys/*/test/* in different modes
on actual VMs and checks results.
Fixes #603
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