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Turns out dirs can be immutable too.
Update #650
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These are not needed now.
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It should be in <linux/fs.h> but is not there on some distros/arches as expected.
Travis build fails with:
<stdin>: In function ‘remove_dir’:
<stdin>:152:13: error: variable ‘attr’ has initializer but incomplete type
<stdin>:152:13: error: excess elements in struct initializer [-Werror]
<stdin>:152:13: error: (near initialization for ‘attr’) [-Werror]
<stdin>:152:21: error: storage size of ‘attr’ isn’t known
<stdin>:153:20: error: ‘FS_IOC_FSSETXATTR’ undeclared (first use in this function)
<stdin>:153:20: note: each undeclared identifier is reported only once for each function it appears in
<stdin>:152:21: error: unused variable ‘attr’ [-Werror=unused-variable]
cc1: all warnings being treated as errors
https://travis-ci.org/google/syzkaller/jobs/413574080
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Fixes #650
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After setuid the process won't have rights to reset net namespace,
but it should not be able to change it during fuzzing too.
So just skip that part.
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With checkpoint_net_namespace moved to setup_common,
and Android fuzzing session terminates prematurely due to
ipv4_tables not being initialized at this time.
Moving the call back to loop fixes this behavior.
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gcc complains:
error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
Also fix includes.
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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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Add syz_errno syscall which sets errno to the argument,
and add a test with different errno values.
This mostly tests the testing infrastructure itself.
Add syz_compare syscall which compare two blobs,
this can be used for testing of argument memory layout.
Implement syz_mmap and fix Makefile to allow building syz-execprog for test OS.
Useful for debugging.
Update #603
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We see some failures there, extend logging so that it's least
possible to understand what exactly call has failed.
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Fix conditions for when current_time_ms/sleep_ms are used
and make them static.
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clang-format badly mishandles this part,
moreover different versions mishandle it differently.
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Shell files cause portability problems.
On Linux it's hard to install /bin/sh,
/bin/bash is not present on *BSD.
Any solution is hard to test on Darwin.
Don't even want to mention Windows.
Just do it in Go.
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This will be needed for testing of generated programs.
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1. Remove unnecessary includes.
2. Remove thunk function in threaded mode.
3. Inline syscalls into main for the simplest case.
4. Define main in common.h rather than form with printfs.
5. Fix generation for repeat mode
(we had 2 infinite loops: in main and in loop).
6. Remove unused functions (setup/reset_loop, setup/reset_test,
sandbox_namespace, etc).
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We always have current_time_ms in event_timedwait
so use it instead of manual clock_gettime calls
which tend to be bulkier.
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We already do this in sandbox=none, but forgot about setuid.
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Make as much code as possible shared between all OSes.
In particular main is now common across all OSes.
Make more code shared between executor and csource
(in particular, loop function and threaded execution logic).
Also make loop and threaded logic shared across all OSes.
Make more posix/unix code shared across OSes
(e.g. signal handling, pthread creation, etc).
Plus other changes along similar lines.
Also support test OS in executor (based on portable posix)
and add 4 arches that cover all execution modes
(fork server/no fork server, shmem/no shmem).
This change paves way for testing of executor code
and allows to preserve consistency across OSes and executor/csource.
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