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79e9451f07
freebsd-nq/sys
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Konstantin Belousov 79e9451f07 Vm map code performs clipping when map entry covers region which is 
larger than the operational region.  If the op region size is zero,
clipping would create a zero-sized map entry.  The result is that vm
map splay starts behaving inconsistently, sometimes returning
zero-sized entry, sometimes the next (or previous) entry.

One step further, it could result in e.g. vm_map_wire() setting
MAP_ENTRY_IN_TRANSITION on the zero-sized entry, but failing to clear
it in the done part.  The vm_map_delete() than hangs forever waiting
for the flag removal.

Verify for zero-length requests and act as if it is always successfull
without performing any action on the address space.

Diagnosed by:	pho
Tested by:	pho (previous version)
Reviewed by:	alc (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2013-11-20 09:03:48 +00:00
..
amd64 Fix accounting for hw.realmem on the i386 and amd64 platforms. 2013-11-15 16:05:55 +00:00
arm Apply access flags for managed and unmanaged pages properly on ARMv6/v7 2013-11-19 23:37:50 +00:00
boot Add a try-include word (which acts the same as "include") and use it to 2013-11-17 18:12:17 +00:00
bsm Change the cap_rights_t type from uint64_t to a structure that we can extend 2013-09-05 00:09:56 +00:00
cam Introduce seperate mutex lock to protect protect CTL I/O pools, slightly 2013-11-11 08:27:20 +00:00
cddl Fix the function search space. 2013-11-20 01:33:13 +00:00
compat Fix build. 2013-11-05 19:17:19 +00:00
conf Import the axge(4) driver for the ASIX AX88178A and AX88179 USB Ethernet 2013-11-19 00:37:53 +00:00
contrib Remove 'inline' from ar9300_init_pll(), it's too big to inline. 2013-11-08 16:28:00 +00:00
crypto make it so that from/to can be missaligned as it can happen (the geli 2013-11-06 19:14:49 +00:00
ddb
dev Add alternate ID for Novatel MiFi 2200 CDMA, which is used by my 2013-11-20 02:16:47 +00:00
fs Remove useless comparisions of assigned offset and resid with the 2013-11-13 08:55:09 +00:00
gdb rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LAST 2013-07-24 09:45:31 +00:00
geom Add "resize" verb to gmirror(8) and such functionality to geom_mirror(4). 2013-11-19 22:55:17 +00:00
gnu/fs/reiserfs
i386 Fix accounting for hw.realmem on the i386 and amd64 platforms. 2013-11-15 16:05:55 +00:00
ia64 Don't enable interrupts before we call sched_throw(). Interrupts 2013-11-10 04:22:40 +00:00
isa
kern Revert back to use int for the page counts. In vn_io_fault(), the i/o 2013-11-20 08:45:26 +00:00
kgssapi Add support for host-based (Kerberos 5 service principal) initiator 2013-07-09 01:05:28 +00:00
libkern Fix ixp425 boot2 with ARM EABI: 2013-09-29 15:19:34 +00:00
mips As of r257209, all architectures have defined VM_KMEM_SIZE_SCALE. In other 2013-11-08 16:25:00 +00:00
modules Import the axge(4) driver for the ASIX AX88178A and AX88179 USB Ethernet 2013-11-19 00:37:53 +00:00
net Allow ethernet drivers to pass in packets connected via the nextpkt pointer. 2013-11-18 22:58:14 +00:00
net80211 Fix AMRR to correctly select the initial rate. 2013-11-09 07:30:13 +00:00
netatalk The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
netgraph Eliminate duplicated & dead code. 2013-11-08 22:40:33 +00:00
netinet In r257692 I intentionally deleted code that handled P2P interfaces 2013-11-17 15:14:07 +00:00
netinet6 Fix panic with RADIX_MPATH, when RTFREE_LOCKED() called for already 2013-11-11 12:49:00 +00:00
netipsec Initialize prot variable. 2013-11-11 13:19:55 +00:00
netipx The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
netnatm Provide includes that are needed in these files, and before were read 2013-10-26 18:18:50 +00:00
netpfil Some fixups to pf_get_sport after r257223: 2013-11-14 14:20:35 +00:00
netsmb Catch up with sb_timeo type change in r255138. This fixes 2013-11-08 08:44:09 +00:00
nfs The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
nfsclient The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
nfsserver The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
nlm Intermittent crashes in the NLM (rpc.lockd) code during system 2013-09-06 23:14:31 +00:00
ofed Fix creating a vlan over lagg over mlxen crash. 2013-11-17 20:58:31 +00:00
opencrypto Make sendfile() a method in the struct fileops. Currently only 2013-08-15 07:54:31 +00:00
pc98 x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...) 2013-11-14 15:37:20 +00:00
pci Add preliminary support for RTL8168EP. 2013-10-29 05:37:05 +00:00
powerpc Add a sysctl to allow disabling resetting the OF syscons. 2013-11-17 20:29:33 +00:00
rpc Some minor tuning to rpc/svc.c: 2013-11-14 13:51:53 +00:00
security The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
sparc64 As of r257209, all architectures have defined VM_KMEM_SIZE_SCALE. In other 2013-11-08 16:25:00 +00:00
sys Bump __FreeBSD_version for iconv changes 2013-11-17 22:59:06 +00:00
teken
tools
ufs UFS2: make di_extsize unsigned. 2013-10-24 00:33:29 +00:00
vm Vm map code performs clipping when map entry covers region which is 2013-11-20 09:03:48 +00:00
x86 x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...) 2013-11-14 15:37:20 +00:00
xdr
xen Remove redundant redeclaration of gdtset in sys/xen/xen-os.h, to silence 2013-10-18 17:06:13 +00:00
Makefile