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4ae224c663
freebsd-dev/sys
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Conrad Meyer 4ae224c663 Revert r240317 to prevent leaking pmap entries 
Subsequent to r240317, kmem_free() was replaced with kva_free() (r254025).
kva_free() releases the KVA allocation for the mapped region, but no longer
clears the pmap (pagetable) entries.

An affected pmap_unmapdev operation would leave the still-pmap'd VA space
free for allocation by other KVA consumers.  However, this bug easily
avoided notice for ~7 years because most devices (1) never call
pmap_unmapdev and (2) on amd64, mostly fit within the DMAP and do not need
KVA allocations.  Other affected arch are less popular: i386, MIPS, and
PowerPC.  Arm64, arm32, and riscv are not affected.

Reported by:	Don Morris <dgmorris AT earthlink.net>
Submitted by:	Don Morris (amd64 part)
Reviewed by:	kib, markj, Don (!amd64 parts)
MFC after:	I don't intend to, but you might want to
Sponsored by:	Dell Isilon
Differential Revision:	https://reviews.freebsd.org/D25689
2020-07-16 23:29:26 +00:00
..
amd64 Revert r240317 to prevent leaking pmap entries 2020-07-16 23:29:26 +00:00
arm Switch from SCTP to SCTP_SUPPORT in GENERIC configs. 2020-07-16 15:09:04 +00:00
arm64 Switch from SCTP to SCTP_SUPPORT in GENERIC configs. 2020-07-16 15:09:04 +00:00
bsm bsm: add AUE_CLOSERANGE 2020-04-24 01:27:25 +00:00
cam Hold the mutex when releasing a callout. 2020-07-16 20:43:28 +00:00
cddl Fix page fault in zfsctl_snapdir_getattr 2020-07-02 13:17:31 +00:00
compat linuxkpi: Ignore NULL pointers passed to string parameter of kstr(n)dup 2020-07-14 21:56:59 +00:00
conf Add a driver for the SafeXcel EIP-97. 2020-07-14 14:09:29 +00:00
contrib Rename nvpair.c to bsd_nvpair.c to not conflict with openzfs' version. 2020-06-27 00:55:03 +00:00
crypto Add domain policy allocation for amd64 fpu_kern_ctx 2020-07-03 14:54:46 +00:00
ddb [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
dev Add VIRTIO_BLK_T_DISCARD support to the virtio-blk driver 2020-07-16 16:32:16 +00:00
dts Remove licenses 2020-06-04 17:20:58 +00:00
fs Fix the pNFS flexible file layout client for servers with small write size. 2020-07-15 01:26:28 +00:00
gdb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
geom g_concat_find_device: trim /dev/ if it is present, like other GEOM 2020-07-09 08:00:46 +00:00
gnu dts: patch the am33xx dts for upcoming clock support 2020-06-05 20:14:54 +00:00
i386 Revert r240317 to prevent leaking pmap entries 2020-07-16 23:29:26 +00:00
isa sc(4) md bits: stop setting sc->kbd entirely 2019-12-30 02:07:55 +00:00
kern vfs: fix vn_poll performance with either MAC or AUDIT 2020-07-16 14:09:18 +00:00
kgssapi Add support for optional separate output buffers to in-kernel crypto. 2020-05-25 22:12:04 +00:00
libkern libkern: Add arc4random_uniform 2020-05-23 17:51:06 +00:00
mips Revert r240317 to prevent leaking pmap entries 2020-07-16 23:29:26 +00:00
modules build DTS for Orange Pi PC Plus as well 2020-07-15 18:04:01 +00:00
net tuntap: drop redundant if_mtu assignment in tuncreate 2020-07-16 15:02:11 +00:00
net80211 [net80211] Commit files missing in the previous commit 2020-07-01 00:24:55 +00:00
netgraph Add support for [read|write] supported data length commands. 2020-07-08 06:33:07 +00:00
netinet (Re)-allow 0.0.0.0 to be used as an address in connect() for TCP 2020-07-16 16:46:24 +00:00
netinet6 Switch inet6 default route subscription to the new rib subscription api. 2020-07-12 11:24:23 +00:00
netipsec Simplify IPsec transform-specific teardown. 2020-06-25 23:59:16 +00:00
netpfil Don't print VNET pointer when initializing dummynet 2020-07-13 13:35:36 +00:00
netsmb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
nfs Use epoch(9) for rtentries to simplify control plane operations. 2020-05-23 10:21:02 +00:00
nfsclient
nfsserver
nlm Fix export_args ex_flags field so that is 64bits, the same as mnt_flags. 2020-06-14 00:10:18 +00:00
ofed Infiniband clients must be attached and detached in a specific order in ibcore. 2020-07-06 08:50:11 +00:00
opencrypto Add crypto_initreq() and crypto_destroyreq(). 2020-07-16 21:30:46 +00:00
powerpc Revert r240317 to prevent leaking pmap entries 2020-07-16 23:29:26 +00:00
riscv Switch from SCTP to SCTP_SUPPORT in GENERIC configs. 2020-07-16 15:09:04 +00:00
rpc Fix up a comment added by r362455. 2020-06-21 02:49:56 +00:00
security vfs: fix vn_poll performance with either MAC or AUDIT 2020-07-16 14:09:18 +00:00
sys fd: remove fd_lastfile 2020-07-15 10:24:04 +00:00
teken Adjust teken to allow build as part of loader 2019-09-05 18:07:40 +00:00
tests Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
tools vfs: stop null checking routines in vop wrappers 2020-01-26 00:41:38 +00:00
ufs The binary representation of the superblock (the fs structure) is written 2020-06-19 01:04:25 +00:00
vm Add vm_map_valid_range_KBI(). 2020-07-13 16:39:27 +00:00
x86 hwpmc: Always set pmc_cpuid to something 2020-07-14 22:25:06 +00:00
xdr Split XDR into separate kernel module. Make krpc depend on xdr. 2020-04-17 06:04:20 +00:00
xen Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (16 of many) 2020-02-25 19:04:39 +00:00
Makefile Remove sparc64 kernel support 2020-02-03 17:35:11 +00:00