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path: root/sys/kern/kern_ktrace.c
AgeCommit message (Collapse)Author
2017-12-30Don't pull in <sys/file.h> just to get fcntl.hPhilip Guenther
ok deraadt@ krw@
2017-11-28Delete fktrace(2). The consequences of it were not thought throughPhilip Guenther
sufficiently and at least one horrific security hole was the result. ok deraadt@ beck@
2017-08-12add a fktrace syscall that takes a file descriptor instead of a name.Ted Unangst
libc and man page parts to come. ok guenther
2017-02-14Convert most of the manual checks for CPU hogging to sched_pause().Martin Pieuchot
The distinction between preempt() and yield() stays as it is usueful to know if a thread decided to yield by itself or if the kernel told him to go away. ok tedu@, guenther@
2017-01-21p_comm is the process's command and isn't per thread, so move it fromPhilip Guenther
struct proc to struct process. ok deraadt@ kettenis@
2016-11-07Split PID from TID, giving processes a PID unrelated to the TID of theirPhilip Guenther
initial thread ok jsing@ kettenis@
2016-03-19Remove the unused flags argument from VOP_UNLOCK().natano
torture tested on amd64, i386 and macppc ok beck mpi stefan "the change looks right" deraadt
2016-03-06No more compat emulations, so remove ktrace EMUL records and the baggagePhilip Guenther
for generating and parsing them. ok mpi@ naddy@ millert@ deraadt@
2015-12-06Change kernel internal pledge variables to 64bit (to prepare for moreTheo de Raadt
extensions). This change is exposed in ktrace.out files ok semarie
2015-12-05remove stale lint annotationsTed Unangst
2015-11-11ktrace vnodes do not need to be opened with FREAD, as they areTheo de Raadt
only written to. (Will keep an eye out for NFS surprises) ok guenther
2015-11-02move the pledgenote annotation from `struct proc' to `struct nameidata'Sebastien Marie
pledgenote is used for annotate the policy for a namei context. So make it tracking the nameidata. It is expected for the caller to explicitly define the policy. It is a kernel bug to not do so. ok deraadt@
2015-10-28Though sys_ktrace is not yet pledge allowed, prepare by settingTheo de Raadt
p_pledgenote as required. XXX open question to guenther regarding FREAD to vnopen() / vnclose()
2015-10-25Fold "malloc" into "stdio" and -- recognizing that no program so far hasTheo de Raadt
used less than "stdio" -- include all the "self" operations. Instead of different defines, use regular PLEDGE_* in the "p_pledgenote" variable (which indicates the operation subtype a system call is performing). Many checks before easier to understand. p_pledgenote can often be passed directly to ktrace, so that kdump says: 15565 test CALL pledge(0xa9a3f804c51,0) 15565 test STRU pledge request="stdio" 15565 test RET pledge 0 15565 test CALL open(0xa9a3f804c57,0x2<O_RDWR>) 15565 test NAMI "/tmp/testfile" 15565 test PLDG open, "wpath", errno 1 Operation not permitted with help from semarie, ok guenther
2015-10-09Rename tame() to pledge(). This fairly interface has evolved to be moreTheo de Raadt
strict than anticipated. It allows a programmer to pledge/promise/covenant that their program will operate within an easily defined subset of the Unix environment, or it pays the price.
2015-10-02Add ktracing of argv and envp to execve(2), with envp not traced by defaultPhilip Guenther
ok tedu@ deraadt@
2015-09-13Rename __sysctl syscall to just sysctl, as the userland wrapper is no longerPhilip Guenther
necessary ok deraadt@ jsing@
2015-09-07Delete ktracing of context switches: it's unused, and not particularly useful,Philip Guenther
and doing VOP_WRITE() from inside tsleep/msleep makes the locking too complicated, making it harder to move forward on MP changes. ok deraadt@ kettenis@
2015-08-22Move to tame(int flags, char *paths[]) API/ABI.Theo de Raadt
The pathlist is a whitelist of dirs and files; anything else returns ENOENT. Recommendation is to use a narrowly defined list. Also add TAME_FATTR, which permits explicit change operations against "struct stat" fields. Some other TAME_ flags are refined slightly. Not cranking libc now, since nothing commited in base uses this and the timing is uncomfortable for others. Discussed with many; thanks for a few bug fixes from semarie, doug, guenther. ok guenther
2015-08-01Fix free() of uninitialized variable introduced in previous commit.Philip Guenther
Eliminate the goto that I tripped on. problem noted by Mark Latimer (mark.latimer (at) gmail.com) ok miod@ millert@
2015-07-19Make KTR_SYSRET records variables variables sized, leaving out thePhilip Guenther
retval on error, including a long long retval on successful lseek(), and including a register_t retval for other successes. This fixes lseek reporting on ILP32 archs. While here, reworking internal kern_ktrace.c bits to be able to pass two buffers to ktrwriteraw(), so we can avoid mallocing a buffer in some cases and so that KTR_GENIO logs are split at PAGE_SIZE, not PAGE_SIZE-sizeof(struct ktrgenio) ok miod@
2014-12-29Explicitely include <uvm/uvm_extern.h> in order to build on variable page sizeMiod Vallat
architectures.
2014-12-16primary change: move uvm_vnode out of vnode, keeping only a pointer.Ted Unangst
objective: vnode.h doesn't include uvm_extern.h anymore. followup changes: include uvm_extern.h or lock.h where necessary. ok and help from deraadt
2014-12-10convert bcopy to memcpy. ok millertTed Unangst
2014-10-26Now that threads hold their own reference to their ucreds, sys_ktrace()Philip Guenther
doesn't need to hold an extra reference during the call ok deraadt@ millert@
2014-07-13KERNEL_ASSERT_LOCKED(9): Assertion for kernel lock (Rev. 3)Masao Uebayashi
This adds a new assertion macro, KERNEL_ASSERT_LOCKED(), to assert that kernel_lock is held. In the long process of removing kernel_lock, there will be a lot (hundreds or thousands) of use of this; virtually almost all functions in !MP-safe subsystems should have this assertion. Thus this assertion should have a short, good name. Not only that "KERNEL_ASSERT_LOCKED" is consistent with other KERNEL_* and SCHED_ASSERT_LOCKED() macros. Input from dlg@ guenther@ kettenis@. OK dlg@ guenther@
2014-07-13pass the size to free in some of the obvious casesTed Unangst
2014-07-12add a size argument to free. will be used soon, but for now default to 0.Ted Unangst
after discussions with beck deraadt kettenis.
2014-07-08decouple struct uvmexp into a new file, so that uvm_extern.h and sysctl.hTheo de Raadt
don't need to be married. ok guenther miod beck jsing kettenis
2014-03-30Eliminates struct pcred by moving the real and saved ugids intoPhilip Guenther
struct ucred; struct process then directly links to the ucred Based on a discussion at c2k10 or so before noting that FreeBSD and NetBSD did this too. ok matthew@
2014-03-26Move p_emul and p_sigcode from proc to process.Philip Guenther
Tweak the handling of ktrace EMUL when changing ktracing: only generate one per process (not one per thread) and pass the correct proc pointer down to the VFS layer. Permit generating of NAMI and CSW records inside ktrace(2) itself. ok deraadt@ millert@
2014-01-21bzero -> memsetTed Unangst
2014-01-20Threads can't be zombies, only processes, so change zombproc to zombprocess,Philip Guenther
make it a list of processes, and change P_NOZOMBIE and P_STOPPED from thread flags to process flags. Add allprocess list for the code that just wants to see processes. ok tedu@
2013-09-14Correct the handling of I/O of >=2^32 bytes and the ktracing there ofPhilip Guenther
by using size_t/ssize_t instead of int/u_int to handle I/O lengths in uiomove(), vn_fsizechk(), and ktrgenio(). Eliminate the always-zero 'error' argument to ktrgenio() at the same time.
2013-06-01always implement stub utrace syscall, but keep the body #ifdef KTRACETed Unangst
ok guenther matthew
2013-06-01Add utrace(2), a system call allowing for userland to send its own ktraceMiod Vallat
records. From FreeBSD via otto@, with tweaks suggested by guenther@. Commite on behalf of otto@ who is not around, to ride the libc minor bump. Causes a librthread minor bump as well (new syscall).
2012-04-10Add a start record to the ktrace and use a special magic string "KTR"Mike Belopuhov
to identify ktrace files. kdump(1) will now refuse to operate on trace data without the start record and as a bonus will print only PID, unless an -H flag is specified to print PID/TID pairs. Initial diff, input from and ok deraadt, guenther.
2012-03-19Add tracing and dumping of "pointer to struct" syscall arguments forPhilip Guenthe
structs timespec, timeval, sigaction, and rlimit. ok otto@ jsing@
2011-12-14Handle rthreads consistently in ktrace by moving the flags and vnode intoPhilip Guenthe
struct process; KTRFAC_ACTIVE becomes P_INKTR. Also, save the credentials used to open the file in sys_ktrace() and use them for all writes to the vnode. much feedback and ok jsing@
2011-11-21fix small (one stack word) kmem->user leak - the syscall code doesDamien Miller
not zero retval when returning an error, so don't copy it back to a ktracer in this case. dropped by R00T-DUDE in his "Unusual and Hilarious Vulnerabilities" talk at Ruxcon 2011; ok guenther@ miod@
2011-07-11Revert art@'s moving around of the KERNEL_LOCK()/KERNEL_UNLOCK() calls,Philip Guenthe
as it causes hangs in some ports, including libsigsegv's configure script confirmed by krw@, landry@
2011-07-08Support sending struct info to kdump. So far for struct stat andOtto Moerbeek
struct sockaddress; mostly from freebsd. ok deraadt@ tedu@ nicm@
2011-07-07There is a bunch of places in the kernel entry points where we don'tArtur Grabowski
hold the kernel lock, but still need call one function that needs it. Instead of grabbing the lock all over the place, move the locks into the affected functions: trapsignal, scdebug*, ktrsyscall, ktrsysret, systrace_redirect and ADDUPROF. In the cases we already hold the biglock we'll just recurse. kettenis@, beck@ ok
2011-06-02We will ignore retval2; it is not an issueTheo de Raadt
2011-04-02Move P_SUGID and P_SUGIDEXEC from struct proc to struct process, soPhilip Guenthe
that you can't evade the checks by doing the dirty work in an rthread ok blambert@, deraadt@
2010-07-26Correct the links between threads, processes, pgrps, and sessions,Philip Guenthe
so that the process-level stuff is to/from struct process and not struct proc. This fixes a bunch of problem cases in rthreads. Based on earlier work by blambert and myself, but mostly written at c2k10. Tested by many: deraadt, sthen, krw, ray, and in snapshots
2009-10-31Use suser when possible. Suggested by miod@.Federico G. Schwindt
miod@ deraadt@ ok.
2009-07-09Remove the VREF() macro and replaces all instances with a call to verf(),Thordur I. Bjornsson
which is exactly what the macro does. Macro's that are nothing more then: #define FUNCTION(arg) function(arg) are almost always pointless and should go away. OK blambert@ Agreed by many.
2008-11-01Grab a reference to the trace vnode of the process when traversing thePedro Martelletto
global process list and calling ktrsettracevnode() in ktrwrite(), so that we don't sleep in vrele(). Discussed with deraadt@, okay beck@, tedu@ and thib@.
2008-10-31accidental commit ... backoutTheo de Raadt
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