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freebsd-dev/sys/net
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Jonathan T. Looney 0766f278d8 Make UMA and malloc(9) return non-executable memory in most cases. 
Most kernel memory that is allocated after boot does not need to be
executable.  There are a few exceptions.  For example, kernel modules
do need executable memory, but they don't use UMA or malloc(9).  The
BPF JIT compiler also needs executable memory and did use malloc(9)
until r317072.

(Note that a side effect of r316767 was that the "small allocation"
path in UMA on amd64 already returned non-executable memory.  This
meant that some calls to malloc(9) or the UMA zone(9) allocator could
return executable memory, while others could return non-executable
memory.  This change makes the behavior consistent.)

This change makes malloc(9) return non-executable memory unless the new
M_EXEC flag is specified.  After this change, the UMA zone(9) allocator
will always return non-executable memory, and a KASSERT will catch
attempts to use the M_EXEC flag to allocate executable memory using
uma_zalloc() or its variants.

Allocations that do need executable memory have various choices.  They
may use the M_EXEC flag to malloc(9), or they may use a different VM
interfact to obtain executable pages.

Now that malloc(9) again allows executable allocations, this change also
reverts most of r317072.

PR:		228927
Reviewed by:	alc, kib, markj, jhb (previous version)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D15691
2018-06-13 17:04:41 +00:00
..
altq UDP: further performance improvements on tx 2018-05-23 21:02:14 +00:00
bpf_buffer.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
bpf_buffer.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
bpf_filter.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
bpf_jitter.c Make UMA and malloc(9) return non-executable memory in most cases. 2018-06-13 17:04:41 +00:00
bpf_jitter.h Make UMA and malloc(9) return non-executable memory in most cases. 2018-06-13 17:04:41 +00:00
bpf_zerocopy.c sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
bpf_zerocopy.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
bpf.c Fix a memory leak for the BIOCSETWF ioctl on kernels with the BPF_JITTER 2018-06-11 23:32:06 +00:00
bpf.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
bpfdesc.h Make BPF global lock an SX 2018-04-10 19:42:50 +00:00
bridgestp.c UDP: further performance improvements on tx 2018-05-23 21:02:14 +00:00
bridgestp.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
dlt.h Re-apply r190640. 2018-05-31 09:11:21 +00:00
ethernet.h Allow to specify PCP on packets not belonging to any VLAN. 2018-03-27 15:29:32 +00:00
firewire.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
ieee8023ad_lacp.c Added missing CTLFLAG_VNET to lacp default_strict_mode 2018-01-24 10:13:14 +00:00
ieee8023ad_lacp.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
ieee_oui.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_arp.h Remove support for the Arcnet protocol. 2018-04-13 21:18:04 +00:00
if_bridge.c Allow different bridge types to coexist 2018-05-11 05:00:40 +00:00
if_bridgevar.h Allow different bridge types to coexist 2018-05-11 05:00:40 +00:00
if_clone.c net: fix set but not used 2018-05-19 05:27:49 +00:00
if_clone.h iflib(9): Add support for cloning pseudo interfaces 2018-05-11 20:08:28 +00:00
if_dead.c sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_debug.c sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_disc.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
if_dl.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
if_edsc.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
if_enc.c netpfil: Introduce PFIL_FWD flag 2018-03-23 16:56:44 +00:00
if_enc.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_epair.c Improve MAC address uniqueness on if_epair(4). 2018-05-23 13:10:57 +00:00
if_ethersubr.c Reduce overhead of entropy collection 2018-05-31 21:53:07 +00:00
if_fwsubr.c Improve copy-and-pasted versions of SIOCGIFADDR. 2018-03-27 20:51:49 +00:00
if_gif.c Rework if_gif(4) to use new encap_lookup_t method to speedup lookup 2018-06-05 21:24:59 +00:00
if_gif.h Rework if_gif(4) to use new encap_lookup_t method to speedup lookup 2018-06-05 21:24:59 +00:00
if_gre.c Rework if_gre(4) to use encap_lookup_t method to speedup lookup 2018-06-13 11:11:33 +00:00
if_gre.h Rework if_gre(4) to use encap_lookup_t method to speedup lookup 2018-06-13 11:11:33 +00:00
if_ipsec.c Apply the change from r272770 to if_ipsec(4) interface. 2018-05-11 16:50:25 +00:00
if_ipsec.h
if_lagg.c CK: update consumers to use CK macros across the board 2018-05-24 23:21:23 +00:00
if_lagg.h CK: update consumers to use CK macros across the board 2018-05-24 23:21:23 +00:00
if_llatbl.c CK: update consumers to use CK macros across the board 2018-05-24 23:21:23 +00:00
if_llatbl.h CK: update consumers to use CK macros across the board 2018-05-24 23:21:23 +00:00
if_llc.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
if_loop.c Explicitly change the link state when we assingn an address. 2018-06-09 09:57:14 +00:00
if_me.c Rework IP encapsulation handling code. 2018-06-05 20:51:01 +00:00
if_media.c Finish removing FDDI and tokenring media support. 2018-04-23 21:10:33 +00:00
if_media.h Finish removing FDDI and tokenring media support. 2018-04-23 21:10:33 +00:00
if_mib.c
if_mib.h
if_pflog.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_pfsync.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_sppp.h
if_spppfr.c
if_spppsubr.c ifnet: Replace if_addr_lock rwlock with epoch + mutex 2018-05-18 20:13:34 +00:00
if_stf.c Rework IP encapsulation handling code. 2018-06-05 20:51:01 +00:00
if_tap.c ifnet: Replace if_addr_lock rwlock with epoch + mutex 2018-05-18 20:13:34 +00:00
if_tap.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_tapvar.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
if_tun.c ifnet: Replace if_addr_lock rwlock with epoch + mutex 2018-05-18 20:13:34 +00:00
if_tun.h
if_types.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
if_var.h CK: update consumers to use CK macros across the board 2018-05-24 23:21:23 +00:00
if_vlan_var.h Allow to specify PCP on packets not belonging to any VLAN. 2018-03-27 15:29:32 +00:00
if_vlan.c ifnet: Replace if_addr_lock rwlock with epoch + mutex 2018-05-18 20:13:34 +00:00
if_vxlan.c net: fix set but not used 2018-05-19 05:27:49 +00:00
if_vxlan.h Add support for IPv6 scoped addresses to vxlan 2017-12-30 04:03:53 +00:00
if.c if_setlladdr: don't call ioctl in epoch context 2018-05-30 21:46:10 +00:00
if.h iflib(9): Add support for cloning pseudo interfaces 2018-05-11 20:08:28 +00:00
ifdi_if.m iflib(9): Add support for cloning pseudo interfaces 2018-05-11 20:08:28 +00:00
iflib_clone.c iflib(9): Add support for cloning pseudo interfaces 2018-05-11 20:08:28 +00:00
iflib_private.h Work around lack of TX IRQs in iflib for netmap 2018-05-16 21:03:22 +00:00
iflib.c Remove tx task spinning added in r333686 2018-06-08 21:49:19 +00:00
iflib.h iflib: mark irq allocation name parameter as constant 2018-05-29 21:56:39 +00:00
ifq.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
mp_ring.c mp_ring: fix i386 2018-05-19 16:44:12 +00:00
mp_ring.h
mppc.h
mppcc.c
mppcd.c
netisr_internal.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
netisr.c sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
netisr.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
netmap_legacy.h netmap: align codebase to the current upstream (commit id 3fb001303718146) 2018-04-12 07:20:50 +00:00
netmap_user.h netmap: align codebase to the current upstream (commit id 3fb001303718146) 2018-04-12 07:20:50 +00:00
netmap_virt.h netmap: align codebase to the current upstream (commit id 3fb001303718146) 2018-04-12 07:20:50 +00:00
netmap.h netmap: align codebase to the current upstream (commit id 3fb001303718146) 2018-04-12 07:20:50 +00:00
paravirt.h
pfil.c netpfil: Introduce PFIL_FWD flag 2018-03-23 16:56:44 +00:00
pfil.h netpfil: Introduce PFIL_FWD flag 2018-03-23 16:56:44 +00:00
pfkeyv2.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
pfvar.h pf: Add missing include statement 2018-05-30 12:40:37 +00:00
ppp_defs.h
radix_mpath.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
radix_mpath.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
radix.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
radix.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
raw_cb.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
raw_cb.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
raw_usrreq.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
rndis.h
route_var.h
route.c uma: fix up r334824 2018-06-08 05:40:36 +00:00
route.h Reduce code duplication for inpcb route caching 2018-01-23 03:15:39 +00:00
rss_config.c
rss_config.h
rtsock.c UDP: further performance improvements on tx 2018-05-23 21:02:14 +00:00
sff8436.h
sff8472.h ifconfig(8): Display extended compliance code string for SFP transceivers 2017-12-05 18:42:07 +00:00
slcompress.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
slcompress.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
toeplitz.c
toeplitz.h
vnet.c Use NULL for SYSINIT's last arg, which is a pointer type 2018-05-18 17:58:09 +00:00
vnet.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00