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c636255150
freebsd-skq/sys/kern
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Alfred Perlstein c636255150 fix races in the uidinfo subsystem, several problems existed: 
1) while allocating a uidinfo struct malloc is called with M_WAITOK,
   it's possible that while asleep another process by the same user
   could have woken up earlier and inserted an entry into the uid
   hash table.  Having redundant entries causes inconsistancies that
   we can't handle.

   fix: do a non-waiting malloc, and if that fails then do a blocking
   malloc, after waking up check that no one else has inserted an entry
   for us already.

2) Because many checks for sbsize were done as "test then set" in a non
   atomic manner it was possible to exceed the limits put up via races.

   fix: instead of querying the count then setting, we just attempt to
   set the count and leave it up to the function to return success or
   failure.

3) The uidinfo code was inlining and repeating, lookups and insertions
   and deletions needed to be in their own functions for clarity.

Reviewed by: green
2000-06-22 22:27:16 +00:00
..
bus_if.m * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
device_if.m * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
genassym.sh Use "nm | awk ..." instead of genassym(1) to generate symbol value headers. 2000-06-02 09:27:48 +00:00
imgact_aout.c Remove ~25 unneeded #include <sys/conf.h> 2000-04-19 14:58:28 +00:00
imgact_elf.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
imgact_gzip.c useracc() the prequel: 1999-10-29 18:09:36 +00:00
imgact_shell.c Fix #! script exec under linux emulation. If a script is exec'd from a 2000-04-26 20:58:40 +00:00
inflate.c Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 05:07:58 +00:00
init_main.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
init_sysent.c Second of two commits adding capability manipulation syscalls for 2000-06-15 23:27:18 +00:00
kern_accf.c return of the accept filter part II 2000-06-20 01:09:23 +00:00
kern_acct.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
kern_acl.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
kern_cap.c Introduce additional POSIX.1e-related stubs 2000-06-07 04:53:49 +00:00
kern_clock.c Remove ~25 unneeded #include <sys/conf.h> 2000-04-19 14:58:28 +00:00
kern_conf.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_descrip.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_environment.c Change the prototype of the strto* routines to make the second 1999-11-24 01:03:08 +00:00
kern_event.c Add code so that the udata field is preserved across a TRACK event. 2000-06-22 18:39:31 +00:00
kern_exec.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
kern_exit.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_fork.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_intr.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
kern_jail.c o Modify jail to limit creation of sockets to UNIX domain sockets, 2000-06-04 04:28:31 +00:00
kern_kthread.c Panic if proc0 hasn't been created and we try to call kthread_create. 2000-01-10 08:00:58 +00:00
kern_ktrace.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
kern_linker.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_lock.c Eliminate the undocumented, experimental, non-delivering and highly 2000-03-16 08:51:55 +00:00
kern_lockf.c Commit the remaining part of PR14914: 1999-11-16 16:28:58 +00:00
kern_malloc.c sys/malloc.h: 2000-06-14 18:31:42 +00:00
kern_mib.c Dammit. 2000-06-07 18:54:41 +00:00
kern_module.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_ntptime.c Isolate the Timecounter internals in their own two files. 2000-03-20 14:09:06 +00:00
kern_physio.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
kern_proc.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_prot.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_random.c Sort the sys includes. 2000-05-22 17:09:13 +00:00
kern_resource.c fix a typo 2000-06-10 19:21:20 +00:00
kern_shutdown.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
kern_sig.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_subr.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_switch.c Commit major SMP cleanups and move the BGL (big giant lock) in the 2000-03-28 07:16:37 +00:00
kern_synch.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_syscalls.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
kern_sysctl.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_tc.c Isolate the Timecounter internals in their own two files. 2000-03-20 14:09:06 +00:00
kern_threads.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
kern_time.c Remove unneeded <sys/buf.h> includes. 2000-04-18 15:15:39 +00:00
kern_timeout.c Restructure TCP timeout handling: 1999-08-30 21:17:07 +00:00
kern_xxx.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
ksched.c Remove unneeded #include <sys/kernel.h> 2000-04-29 15:36:14 +00:00
link_aout.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
link_elf_obj.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
link_elf.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
linker_if.m First round implementation of a fine grain enhanced module to module 2000-04-29 13:19:31 +00:00
Make.tags.inc Add soft updates to the set of things being tagged. Syntax cleanup. 2000-01-27 01:22:06 +00:00
makedevops.pl Fix some bugs in user-end output and add a reference to the original 1999-11-22 14:40:04 +00:00
Makefile ${MACHINE} -> ${MACHINE_ARCH} 1999-11-14 13:54:44 +00:00
makeobjops.pl * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
makesyscalls.sh Fixed the calculation of sy_nargs in sysent tables. We attempted to do 2000-05-09 21:18:30 +00:00
md5c.c Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 05:07:58 +00:00
p1003_1b.c Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
posix4_mib.c Add $FreeBSD$. 2000-04-22 15:13:06 +00:00
subr_acl_posix1e.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
subr_autoconf.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
subr_blist.c Eliminate the undocumented, experimental, non-delivering and highly 2000-03-16 08:51:55 +00:00
subr_bus.c As a bit of a gross hack, allow earlier access to both the static and 2000-06-15 09:57:20 +00:00
subr_clist.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
subr_devstat.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
subr_disk.c Add 'kern.disks', a sysctl which returns the list of disks from 2000-06-22 11:44:43 +00:00
subr_disklabel.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_diskmbr.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_diskslice.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_eventhandler.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
subr_kobj.c * Move the driver_t::refs field to kobj_t to replace kobj_t::instances. 2000-05-01 10:45:15 +00:00
subr_log.c Remove five now unused fields from struct cdevsw. They should never 1999-09-25 18:24:47 +00:00
subr_module.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
subr_param.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
subr_prf.c Do not fault if curproc is null. 2000-04-29 11:32:15 +00:00
subr_prof.c Commit major SMP cleanups and move the BGL (big giant lock) in the 2000-03-28 07:16:37 +00:00
subr_rman.c Replace all the ifdef debugging spaghetti with a single ifdef and 2000-05-03 00:20:36 +00:00
subr_scanf.c Change the prototype of the strto* routines to make the second 1999-11-24 01:03:08 +00:00
subr_smp.c Further fixes for multiple-IO-APIC systems from Tor Egge: 2000-05-31 21:37:28 +00:00
subr_taskqueue.c Add taskqueue system for easy-to-use SWIs among other things. 2000-05-28 15:45:30 +00:00
subr_trap.c Commit major SMP cleanups and move the BGL (big giant lock) in the 2000-03-28 07:16:37 +00:00
subr_xxx.c Remove five now unused fields from struct cdevsw. They should never 1999-09-25 18:24:47 +00:00
sys_generic.c unstatic getfp() so that other subsystems can use it. 2000-06-12 18:06:12 +00:00
sys_pipe.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
sys_process.c Introduce the new function 1999-11-21 19:03:20 +00:00
sys_socket.c Include the UID and GID values filled in by socreate() into socket->so_cred 2000-05-11 22:08:57 +00:00
syscalls.c Second of two commits adding capability manipulation syscalls for 2000-06-15 23:27:18 +00:00
syscalls.master Introduce syscalls for process capability manipulation. Currently backs 2000-06-15 23:08:17 +00:00
sysv_ipc.c Remove the undocumented, flawed, broken-as-designed semconfig() syscall. 2000-05-01 11:13:41 +00:00
sysv_msg.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
sysv_sem.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
sysv_shm.c This is a cleanup patch to Peter's new OBJT_PHYS VM object type 2000-05-29 22:40:54 +00:00
tty_compat.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
tty_conf.c Don't refer to TABLDISC in the comments here. 2000-01-30 10:14:13 +00:00
tty_cons.c Don't follow null pointers if we somehow have a null devswitch entry 2000-01-25 09:20:08 +00:00
tty_pty.c Unused include: #include "pty.h" 2000-06-10 07:12:40 +00:00
tty_snoop.c Unstaticize this driver. You can have as many snoop devices as you can 2000-04-02 00:35:37 +00:00
tty_subr.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
tty_tty.c Remove five now unused fields from struct cdevsw. They should never 1999-09-25 18:24:47 +00:00
tty.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
uipc_accf.c return of the accept filter part II 2000-06-20 01:09:23 +00:00
uipc_domain.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
uipc_mbuf.c Actively limit the allocation of mbufs to NMBUFS/nmbufs and mbuf clusters 1999-12-28 06:35:57 +00:00
uipc_proto.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
uipc_sockbuf.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_socket2.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_socket.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_syscalls.c unstatic getfp() so that other subsystems can use it. 2000-06-12 18:06:12 +00:00
uipc_usrreq.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
vfs_acl.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
vfs_aio.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
vfs_bio.c Virtualizes & untangles the bioops operations vector. 2000-06-16 08:48:51 +00:00
vfs_cache.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
vfs_cluster.c Virtualizes & untangles the bioops operations vector. 2000-06-16 08:48:51 +00:00
vfs_conf.c Make a trip to Pointy-Hats-R-Us and actually include the header that 2000-05-22 17:25:47 +00:00
vfs_default.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
vfs_export.c Virtualizes & untangles the bioops operations vector. 2000-06-16 08:48:51 +00:00
vfs_extattr.c Revert part of my bioops change which implemented panic(8). 2000-06-16 14:32:13 +00:00
vfs_init.c The sysctl mod_xx hack is no longer required now that we have totally 1999-12-12 16:30:34 +00:00
vfs_lookup.c Introduce NDFREE (and remove VOP_ABORTOP) 1999-12-15 23:02:35 +00:00
vfs_mount.c Make a trip to Pointy-Hats-R-Us and actually include the header that 2000-05-22 17:25:47 +00:00
vfs_subr.c Virtualizes & untangles the bioops operations vector. 2000-06-16 08:48:51 +00:00
vfs_syscalls.c Revert part of my bioops change which implemented panic(8). 2000-06-16 14:32:13 +00:00
vfs_vnops.c Add a hack to fail registration of kq events on a non-ufs filesystem, as 2000-06-22 18:41:07 +00:00
vnode_if.pl Use a seperate -c and -h mode. The vnode_if.c file is compiled only into 1999-12-12 16:43:05 +00:00
vnode_if.src Second pass commit to introduce new ACL and Extended Attribute system 1999-12-19 06:08:07 +00:00