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maxv b7edd3d132 Add Kernel Concurrency Sanitizer (kCSan) support. This sanitizer allows us 
to detect race conditions at runtime. It is a variation of TSan that is
easy to implement and more suited to kernel internals, albeit theoretically
less precise than TSan's happens-before.

We do basically two things:

 - On every KCSAN_NACCESSES (=2000) memory accesses, we create a cell
   describing the access, and delay the calling CPU (10ms).

 - On all memory accesses, we verify if the memory we're reading/writing
   is referenced in a cell already.

The combination of the two means that, if for example cpu0 does a read that
is selected and cpu1 does a write at the same address, kCSan will fire,
because cpu1's write collides with cpu0's read cell.

The coverage of the instrumentation is the same as that of kASan. Also, the
code is organized in a way similar to kASan, so it is easy to add support
for more architectures than amd64. kCSan is compatible with KCOV.

Reviewed by Kamil.
2019-11-05 20:19:17 +00:00
..
bufq_disksort.c
Use consistently "bufq_private(bufq)" instead of "bufq->bq_private"
2017-05-04 11:03:27 +00:00
bufq_fcfs.c
Use consistently "bufq_private(bufq)" instead of "bufq->bq_private"
2017-05-04 11:03:27 +00:00
bufq_priocscan.c
Use consistently "bufq_private(bufq)" instead of "bufq->bq_private"
2017-05-04 11:03:27 +00:00
bufq_readprio.c
Use consistently "bufq_private(bufq)" instead of "bufq->bq_private"
2017-05-04 11:03:27 +00:00
cnmagic.c
Correct typo in the comment
2017-05-04 11:01:16 +00:00
compat_stub.c
add a register validation hook for ptrace on netbsd32 to be used for
2019-07-20 18:23:05 +00:00
core_elf32.c
Fix code generation for programs with a faulty process map
2019-01-22 03:44:44 +00:00
core_elf64.c
…
core_netbsd.c
…
exec_aout.c
…
exec_ecoff.c
…
exec_elf32.c
…
exec_elf64.c
…
exec_elf.c
PR/54549: ng0: always initialize execname.
2019-09-16 11:11:34 +00:00
exec_script.c
adjust for new check_exec signature.
2019-09-15 20:21:12 +00:00
exec_subr.c
Export the guard size of the main thread via vm.guard_size. Add a
2017-07-02 16:41:32 +00:00
files.kern
Add Kernel Concurrency Sanitizer (kCSan) support. This sanitizer allows us
2019-11-05 20:19:17 +00:00
genlintstub.awk
…
init_main.c
Remove compile-time asserts checking whether intptr_t and void* are compat
2019-10-03 22:29:17 +00:00
init_sysctl_base.c
Allow architectures to define a macro PROC_MACHINE_ARCH(P) and
2017-10-31 12:37:23 +00:00
init_sysctl.c
remove kern.panic_now -- crashme panic node replaces it.
2019-01-15 07:11:23 +00:00
init_sysent.c
regen
2019-10-21 14:23:53 +00:00
kern_acct.c
fix flatly wrong indent
2019-05-26 19:23:04 +00:00
kern_auth.c
Rename min/max -> uimin/uimax for better honesty.
2018-09-03 16:29:22 +00:00
kern_cctr.c
Fix 'unknown' spellos
2019-06-24 06:24:33 +00:00
kern_cfglock.c
…
kern_clock.c
C99 initializers for intr_timecounter.
2018-09-03 21:29:30 +00:00
kern_condvar.c
Apply C99-style struct initialization to syncobj_t
2018-01-30 07:52:22 +00:00
kern_core.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
kern_cpu.c
Define cpu_xc_* functions with unused second argument to make them
2019-10-06 02:04:26 +00:00
kern_crashme.c
clang does not like to deref a null pointer unless it is qualified volatile
2019-01-13 00:11:29 +00:00
kern_ctf.c
merge a new version of the CDDL dtrace and ZFS code.
2018-05-28 21:04:59 +00:00
kern_descrip.c
handle O_NOSIGPIPE too.
2019-02-20 19:42:14 +00:00
kern_drvctl.c
- move export for devmon_insert_vec into sys/device.h.
2018-09-18 01:25:09 +00:00
kern_event.c
print which process asked for an unsupported event so we can fix it.
2019-10-18 19:43:49 +00:00
kern_exec.c
Remove p_oppid from struct proc
2019-10-12 10:55:23 +00:00
kern_exit.c
Separate flag for suspended by _lwp_suspend and suspended by a debugger
2019-10-03 22:48:44 +00:00
kern_fileassoc.c
…
kern_fork.c
Remove p_oppid from struct proc
2019-10-12 10:55:23 +00:00
kern_history.c
Traiing whitespace
2019-10-09 05:59:51 +00:00
kern_hook.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
kern_idle.c
…
kern_ksyms_buf.c
…
kern_ksyms.c
use Elf_Sym ** instead of casting.
2017-11-04 22:17:55 +00:00
kern_kthread.c
KASSERT() that kthread_join()'s target is expecting to be joined.
2018-01-09 22:58:45 +00:00
kern_ktrace_vfs.c
…
kern_ktrace.c
Rename min/max -> uimin/uimax for better honesty.
2018-09-03 16:29:22 +00:00
kern_lock.c
Avoid prepending a timestamp to lock debug outputs on ddb
2019-05-09 05:00:31 +00:00
kern_lwp.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
kern_malloc.c
Provide a code argument in kasan_mark(), and give a code to each caller.
2019-04-07 09:20:04 +00:00
kern_module_vfs.c
Merge the [pgoyette-compat] branch
2019-01-27 02:08:33 +00:00
kern_module.c
When modules are unloaded, we call sysctl_teardown() before calling
2019-08-08 18:08:41 +00:00
kern_mutex_obj.c
Obtain proper initialized addresses of locks allocated by mutex_obj_alloc or rw_obj_alloc
2018-02-05 04:25:04 +00:00
kern_mutex.c
Avoid prepending a timestamp to lock debug outputs on ddb
2019-05-09 05:00:31 +00:00
kern_ntptime.c
Zero out the ntptimeval structure to prevent a 4 byte kernel stack disclosure.
2018-10-29 22:02:25 +00:00
kern_pax.c
fix typo
2017-06-25 04:10:47 +00:00
kern_physio.c
Don't validate buffer size for tape I/O, this is already done by
2019-04-04 12:26:45 +00:00
kern_pmf.c
expose pmf debug switches with sysctl.
2018-04-08 11:46:13 +00:00
kern_proc.c
Remove p_oppid from struct proc
2019-10-12 10:55:23 +00:00
kern_prot.c
…
kern_ras.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
kern_rate.c
…
kern_reboot.c
retire kern_xxx.c. long live kern_xxx.c.
2018-09-14 01:55:19 +00:00
kern_resource.c
avoid underflow in user/system time.
2019-04-05 00:33:21 +00:00
kern_rndpool.c
- add or adjust /* FALLTHROUGH */ where appropriate
2019-02-03 03:19:25 +00:00
kern_rndq.c
Do all delta calculations strictly using uint32_t. Avoid integer
2019-09-29 12:07:52 +00:00
kern_rndsink.c
…
kern_runq.c
remove checks for failure after memory allocation calls that cannot fail:
2017-06-01 02:45:05 +00:00
kern_rwlock_obj.c
Obtain proper initialized addresses of locks allocated by mutex_obj_alloc or rw_obj_alloc
2018-02-05 04:25:04 +00:00
kern_rwlock.c
Avoid prepending a timestamp to lock debug outputs on ddb
2019-05-09 05:00:31 +00:00
kern_scdebug.c
syscall debug - fix build when SYSCALL_DEBUG option is present in kernel config file
2019-03-14 19:51:49 +00:00
kern_sdt.c
…
kern_sig.c
Fix a race condition when handling concurrent LWP signals and add a test
2019-10-21 17:07:00 +00:00
kern_sleepq.c
…
kern_softint.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
kern_ssp.c
…
kern_stub.c
steal an idea from uwe@ and implement gcc-8 function type cast
2019-10-08 07:33:14 +00:00
kern_subr.c
Accept root device specification as NAME=label
2019-09-16 00:01:16 +00:00
kern_synch.c
Separate flag for suspended by _lwp_suspend and suspended by a debugger
2019-10-03 22:48:44 +00:00
kern_syscall.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
kern_sysctl.c
Invert two conditions, to fix uninitialized memory access. If the node is
2019-07-03 17:31:32 +00:00
kern_tc.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
kern_threadpool.c
Use PRIu64 for "uint64_t tp_refcnt".
2019-01-17 10:18:52 +00:00
kern_time.c
Check for valid timespec in clock_settime1()
2019-10-05 12:57:40 +00:00
kern_timeout.c
Undo previous, in the name of "defined" behaviour, it breaks things.
2019-03-10 13:44:49 +00:00
kern_todr.c
The whole 'tv' structure gets added to the RND pool, so clear it first,
2019-07-07 15:12:59 +00:00
kern_turnstile.c
…
kern_uidinfo.c
PR/53998: Joel Bertrand: Limit the number of semaphores on a
2019-03-01 03:03:19 +00:00
kern_uuid.c
…
kern_veriexec.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
kgdb_stub.c
…
Make.tags.inc
…
Makefile
…
makesyscalls.sh
cast nullop though void *
2019-10-13 22:31:19 +00:00
sched_4bsd.c
Rename min/max -> uimin/uimax for better honesty.
2018-09-03 16:29:22 +00:00
sched_m2.c
Rename min/max -> uimin/uimax for better honesty.
2018-09-03 16:29:22 +00:00
subr_asan.c
Add KASAN instrumentation on ucas and ufetch.
2019-10-10 13:45:14 +00:00
subr_autoconf.c
Fix compile error.
2018-12-01 02:08:16 +00:00
subr_blist.c
fix number of arguments of kmem_alloc and kmem_zalloc macro. ok skrll.
2017-02-13 16:53:41 +00:00
subr_bufq.c
rename module_name to strategy_module_name to avoid fatal shadowing of
2019-02-17 23:17:41 +00:00
subr_callback.c
…
subr_copy.c
Exclude references to _ucas_{32,64}_mp() for _RUMPKERNEL.
2019-04-07 16:27:41 +00:00
subr_cprng.c
Switch from NIST CTR_DRBG with AES to NIST Hash_DRBG with SHA-256.
2019-09-02 20:09:29 +00:00
subr_cpufreq.c
…
subr_csan.c
Add Kernel Concurrency Sanitizer (kCSan) support. This sanitizer allows us
2019-11-05 20:19:17 +00:00
subr_debug.c
…
subr_device.c
…
subr_devsw.c
Add two utility functions to help use kmem with strings: kmem_strdupsize,
2017-11-07 18:35:57 +00:00
subr_disk_mbr.c
Factor out the magic checking code for the label, and make it not depend
2019-05-17 18:50:40 +00:00
subr_disk_open.c
Fix vnode locking for opendisk(), must lock for VOP_OPEN().
2019-02-20 10:02:51 +00:00
subr_disk.c
kern/subr_disk: bounds_check_with_label: really protect against div by zero
2019-09-30 23:23:59 +00:00
subr_disklabel.c
Fix previous. We define _KERNEL for rump in opt_rumpkernel.h.
2019-04-07 02:58:02 +00:00
subr_emul.c
Merge the [pgoyette-compat] branch
2019-01-27 02:08:33 +00:00
subr_evcnt.c
Fix kernel pointer leaks in sysctl_doevcnt.
2018-11-24 17:40:37 +00:00
subr_exec_fd.c
Update comment to match existing function name.
2019-04-08 13:05:23 +00:00
subr_extent.c
More diagnostic
2019-08-15 09:04:22 +00:00
subr_hash.c
…
subr_humanize.c
This had a similar problem to that reported in PR lib/54053
2019-03-12 00:25:44 +00:00
subr_interrupt.c
- don't return ENOMEM for errors not related to memory
2018-01-28 22:24:58 +00:00
subr_iostat.c
Implement disk_rename()/iostat_rename() to rename a disk.
2019-05-22 08:47:02 +00:00
subr_ipi.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
subr_kcov.c
Drop no longer available macros KCOV_STORE() KCOV_LOAD() in kcov(4)
2019-05-26 05:41:45 +00:00
subr_kcpuset.c
Set kcpuset's bit correctly to avoid undefined behavior. Found by KUBSan.
2019-07-26 05:39:55 +00:00
subr_kleak.c
Improve error handling, doesn't matter a lot, but still.
2018-12-10 07:24:49 +00:00
subr_kmem.c
Retire KMEM_GUARD. It has been superseded by kASan, which is much more
2019-08-15 12:06:42 +00:00
subr_kobj_vfs.c
remove checks for failure after memory allocation calls that cannot fail:
2017-06-01 02:45:05 +00:00
subr_kobj.c
add a kobj_error() to a recently added error case
2018-06-23 14:22:30 +00:00
subr_localcount.c
Implement a debugging facility (overflow/underflow detection) for localcount
2017-11-17 09:26:36 +00:00
subr_lockdebug.c
changes of r1.68 was reverted by r1.69. apply it again.
2019-05-28 07:39:16 +00:00
subr_log.c
Rename min/max -> uimin/uimax for better honesty.
2018-09-03 16:29:22 +00:00
subr_lwp_specificdata.c
Implement an aggressive psref leak detector
2019-05-17 03:34:26 +00:00
subr_once.c
add INIT_ONCE(9), FINI_ONCE(9) with changing once_t.
2019-03-19 08:16:51 +00:00
subr_optstr.c
…
subr_pcq.c
Typos.
2018-02-08 09:05:16 +00:00
subr_pcu.c
PR port-arm/52603:
2017-10-16 15:03:57 +00:00
subr_percpu.c
Decorate percpu_cpu_swap() with __noubsan
2019-09-18 15:33:32 +00:00
subr_physmap.c
…
subr_pool.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
subr_prf.c
put back line accidentally removed.
2019-05-21 04:57:02 +00:00
subr_prof.c
Overhaul the API used to fetch and store individual memory cells in
2019-04-06 03:06:23 +00:00
subr_pserialize.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
subr_psref.c
Implement an aggressive psref leak detector
2019-05-17 03:34:26 +00:00
subr_specificdata.c
remove checks for failure after memory allocation calls that cannot fail:
2017-06-01 02:45:05 +00:00
subr_spldebug.c
…
subr_syscall_stats.c
Merge the [pgoyette-compat] branch
2019-01-27 02:08:33 +00:00
subr_tftproot.c
tftproot_getfile(): return E2BIG when bootfile is to long.
2019-01-20 21:26:13 +00:00
subr_thmap.c
pass a pointer to atomic_cas_ptr_p(), not an (equiv) integer.
2019-02-04 08:00:27 +00:00
subr_time.c
Avoid signed integer overflow in ts2timo() for ts->tv_nsec
2019-10-04 14:17:07 +00:00
subr_userconf.c
call cnpollc(1) and cnpollc(0) around cngetc().
2018-09-16 23:18:55 +00:00
subr_vmem.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
subr_workqueue.c
Don't wait on workqueue_wait if called from worker itself
2018-06-13 05:26:12 +00:00
subr_xcall.c
xc_barrier - convenience function to xc_broadcast() a nop.
2019-10-06 15:11:16 +00:00
sys_aio.c
Introduce PR_ZERO to avoid open-coding memset()s everywhere. OK riastradh@.
2019-02-10 17:13:33 +00:00
sys_descrip.c
Add F_GETPATH, presented to tech-kern.
2019-09-15 16:25:57 +00:00
sys_generic.c
remove checks for failure after memory allocation calls that cannot fail:
2017-06-01 02:45:05 +00:00
sys_lwp.c
Move TRAP_CHLD/TRAP_LWP ptrace information from struct proc to siginfo
2019-09-30 21:13:33 +00:00
sys_module.c
Rename the MODULE_*_HOOK() macros to MODULE_HOOK_*() as briefly
2019-03-01 11:06:55 +00:00
sys_mqueue.c
Prevent O_EXEC for mq_open(2), and O_EXEC with a writable fd for open(2).
2019-09-15 20:51:03 +00:00
sys_pipe.c
Handle half-closed pipes in FIONWRITE and FIONSPACE.
2019-04-26 17:24:23 +00:00
sys_process.c
Paranoia... keep vmspace reference while doing pmap_procwr
2017-04-13 07:58:45 +00:00
sys_pset.c
Handle the case when a CPU is assigned to a set it is already a member of.
2018-12-09 23:05:02 +00:00
sys_ptrace_common.c
Add and use __FPTRCAST, requested by uwe@
2019-10-16 18:29:49 +00:00
sys_ptrace.c
handle siginfo requests for ptrace32
2017-12-17 20:59:27 +00:00
sys_sched.c
…
sys_select.c
Validate usec ranges in sys___select50()
2019-09-20 15:00:47 +00:00
sys_sig.c
Introduce sigaction_copy(), to copy sigaction structures without padding,
2019-09-08 07:00:20 +00:00
sys_socket.c
soo_fcntl is identical to fnullop_fcntl, use the latter
2018-12-04 00:18:05 +00:00
sys_syscall.c
Introduce KLEAK, a new feature that can detect kernel information leaks.
2018-12-02 21:00:13 +00:00
syscalls_autoload.c
regen
2019-09-22 23:03:20 +00:00
syscalls.c
regen
2019-09-22 23:03:20 +00:00
syscalls.conf
Add a new member to struct vfsstat and grow the unused members
2019-09-22 22:59:37 +00:00
syscalls.master
Add a new member to struct vfsstat and grow the unused members
2019-09-22 22:59:37 +00:00
systrace_args.c
regen
2019-09-22 23:03:20 +00:00
sysv_ipc.c
Many years ago someone created a new __link_set_sysctl_funcs to hold
2019-08-07 00:38:01 +00:00
sysv_msg.c
Avoid -LONG_MIN msgtyp in msgrcv(2) and treat it as LONG_MAX
2019-10-04 23:20:22 +00:00
sysv_sem.c
Many years ago someone created a new __link_set_sysctl_funcs to hold
2019-08-07 00:38:01 +00:00
sysv_shm.c
simpler fix for the race between shmat() and shmdt():
2019-10-09 17:47:13 +00:00
tty_bsdpty.c
…
tty_conf.c
…
tty_ptm.c
Rename the MODULE_*_HOOK() macros to MODULE_HOOK_*() as briefly
2019-03-01 11:06:55 +00:00
tty_pty.c
Fix reporting EOF via kevent and add a test case
2019-02-15 18:57:15 +00:00
tty_subr.c
remove checks for failure after memory allocation calls that cannot fail:
2017-06-01 02:45:05 +00:00
tty_tty.c
…
tty.c
Rename the MODULE_*_HOOK() macros to MODULE_HOOK_*() as briefly
2019-03-01 11:06:55 +00:00
uipc_accf.c
…
uipc_domain.c
Fix apparent race.
2018-12-27 07:56:43 +00:00
uipc_mbuf.c
mcl_cache: align items to COHERENCY_UNIT
2019-10-19 06:36:47 +00:00
uipc_mbufdebug.c
KNF. No functional change.
2018-10-18 05:44:19 +00:00
uipc_proto.c
…
uipc_sem.c
PR/53998: Joel Bertrand: Limit the number of semaphores on a
2019-03-01 03:03:19 +00:00
uipc_socket2.c
Fix info leaks: the alignment of the structures causes uninitialized heap
2019-07-11 17:30:44 +00:00
uipc_socket.c
Add a check before the memcpy. memcpy is defined to never take NULL as
2019-10-14 16:27:03 +00:00
uipc_syscalls.c
sys_recvmmsg: don't defer an error that already gets returned.
2018-11-12 09:21:13 +00:00
uipc_usrreq.c
Fix info leak: the padding after the header causes uninitialized heap
2019-07-29 09:42:17 +00:00
vfs_bio.c
Change buf_nbuf()'s return value from int to u_int to avoid undefined
2019-08-26 10:24:39 +00:00
vfs_cache.c
More indentation
2019-09-15 17:37:25 +00:00
vfs_cwd.c
…
vfs_dirhash.c
Introduce PR_ZERO to avoid open-coding memset()s everywhere. OK riastradh@.
2019-02-10 17:13:33 +00:00
vfs_getcwd.c
- add missing error check
2019-09-14 21:23:34 +00:00
vfs_hooks.c
…
vfs_init.c
Move pnbuf_cache into vfs_init.c, where it belongs.
2019-03-28 18:12:24 +00:00
vfs_lockf.c
…
vfs_lookup.c
Make namei() work with no root dir yet.
2019-07-18 09:39:40 +00:00
vfs_mount.c
If we could not start extattr for some reason, don't advertise extattr in the
2019-08-19 09:32:42 +00:00
vfs_quotactl.c
…
vfs_subr.c
Add a new member to struct vfsstat and grow the unused members
2019-09-22 22:59:37 +00:00
vfs_syscalls.c
make nmountcompatnames unsigned (assigned from __arraycount, compared with
2019-09-26 01:34:16 +00:00
vfs_trans.c
Add an owner field to fstrans mount info and use it to hold
2019-06-17 08:07:27 +00:00
vfs_vnode.c
Attach "mnt_transinfo" to "dead_rootmount" so every mount has a
2019-02-20 10:07:27 +00:00
vfs_vnops.c
set VEXEC if FEXEC is set.
2019-09-15 20:24:25 +00:00
vfs_wapbl.c
constify wapbl_ops
2018-12-10 21:19:33 +00:00
vfs_xattr.c
…
vnode_if.c
Regen.
2019-10-11 08:05:19 +00:00
vnode_if.sh
As VOP_STRATEGY() usually calls itself on the file system holding "/dev"
2019-10-11 08:04:52 +00:00
vnode_if.src
As VOP_STRATEGY() usually calls itself on the file system holding "/dev"
2019-10-11 08:04:52 +00:00