Konstantin Belousov 19f5d9f27f Fix another race between vm_map_protect() and vm_map_wire(). ... vm_map_wire() increments entry->wire_count, after that it drops the map lock both for faulting in the entry' pages, and for marking next entry in the requested region as IN_TRANSITION. Only after all entries are faulted in, MAP_ENTRY_USER_WIRE flag is set. This makes it possible for vm_map_protect() to run while other entry' MAP_ENTRY_IN_TRANSITION flag is handled, and vm_map_busy() lock does not prevent it. In particular, if the call to vm_map_protect() adds VM_PROT_WRITE to CoW entry, it would fail to call vm_fault_copy_entry(). There are at least two consequences of the race: the top object in the shadow chain is not populated with writeable pages, and second, the entry eventually get contradictory flags MAP_ENTRY_NEEDS_COPY | MAP_ENTRY_USER_WIRED with VM_PROT_WRITE set. Handle it by waiting for all MAP_ENTRY_IN_TRANSITION flags to go away in vm_map_protect(), which does not drop map lock afterwards. Note that vm_map_busy_wait() is left as is. Reported and tested by: pho (previous version) Reviewed by: Doug Moore <dougm@rice.edu>, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D20091		2019-05-01 13:15:06 +00:00
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_vm_radix.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
default_pager.c	SPDX: wrong license.	2017-11-30 15:45:42 +00:00
device_pager.c	Change the vm_ooffset_t type to unsigned.	2018-12-02 13:16:46 +00:00
memguard.c	Eliminate kmem_arena and kmem_object in preparation for further NUMA commits.	2017-11-28 23:40:54 +00:00
memguard.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
phys_pager.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
pmap.h	Add pmap_is_valid_memattr(9).	2018-08-01 18:45:51 +00:00
redzone.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
redzone.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
sg_pager.c	Change the vm_ooffset_t type to unsigned.	2018-12-02 13:16:46 +00:00
swap_pager.c	Improve error reporting when the swap pager runs out of memory.	2019-03-26 19:11:15 +00:00
swap_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
uma_core.c	for a cache-only zone the destructor tries to destroy a non-existent keg	2019-04-12 12:46:25 +00:00
uma_dbg.c	Fix compilation failures on different arches that have vm_machdep.c not	2019-01-15 19:33:47 +00:00
uma_dbg.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
uma_int.h	UMA: unsign some variables related to allocation in hash_alloc().	2019-02-12 04:33:05 +00:00
uma.h	o Move zone limit from keg level up to zone level. This means that now	2019-01-15 00:02:06 +00:00
vm_domainset.c	Add a !NUMA definition for vm_domainset_iter_policy_ref_init().	2018-10-24 17:09:20 +00:00
vm_domainset.h	Refactor domainset iterators for use by malloc(9) and UMA.	2018-10-23 16:35:58 +00:00
vm_extern.h	Add malloc_domainset(9) and _domainset variants to other allocator KPIs.	2018-10-30 18:26:34 +00:00
vm_fault.c	Disallow preemptive creation of wired superpage mappings.	2019-03-21 19:52:50 +00:00
vm_glue.c	Refactor domainset iterators for use by malloc(9) and UMA.	2018-10-23 16:35:58 +00:00
vm_init.c	Do not reserve KVA for paging bufs in vm_ksubmap_init(), since now	2019-01-16 20:14:16 +00:00
vm_kern.c	Eliminate adj_free field from vm_map_entry.	2019-03-29 16:53:46 +00:00
vm_kern.h	Do not reserve KVA for paging bufs in vm_ksubmap_init(), since now	2019-01-16 20:14:16 +00:00
vm_map.c	Fix another race between vm_map_protect() and vm_map_wire().	2019-05-01 13:15:06 +00:00
vm_map.h	Eliminate adj_free field from vm_map_entry.	2019-03-29 16:53:46 +00:00
vm_meter.c	Add a per-pagequeue pdpages counter.	2018-08-23 21:03:45 +00:00
vm_mmap.c	i386: honor kern.elf32.read_exec for ommap(2) and break(2), as already	2019-02-09 03:56:48 +00:00
vm_object.c	Include path for tmpfs objects in vm.objects sysctl	2018-11-30 04:59:43 +00:00
vm_object.h	Change the vm_ooffset_t type to unsigned.	2018-12-02 13:16:46 +00:00
vm_page.c	Implement minidump support for RISC-V.	2019-03-06 00:01:06 +00:00
vm_page.h	Allow vm_page_free_prep() to dequeue pages without the page lock.	2019-02-03 18:43:20 +00:00
vm_pageout.c	Clear pointers to indicate that the respective locks are released.	2019-02-21 15:44:32 +00:00
vm_pageout.h	linuxkpi: Use pageproc instead of vmproc	2018-11-21 04:34:18 +00:00
vm_pagequeue.h	Allow empty NUMA memory domains to support Threadripper2	2018-10-01 14:14:21 +00:00
vm_pager.c	Do not reserve KVA for paging bufs in vm_ksubmap_init(), since now	2019-01-16 20:14:16 +00:00
vm_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
vm_param.h	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
vm_phys.c	vm: remove seq.h inclusion made obsolete by NUMA rewrite	2019-02-27 22:42:29 +00:00
vm_phys.h	MI VM: Make it possible to set size of superpage at boot instead of compile time.	2019-01-18 13:35:06 +00:00
vm_radix.c	vm: stop passing M_ZERO when allocating radix nodes	2018-06-24 13:08:05 +00:00
vm_radix.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
vm_reserv.c	MI VM: Make it possible to set size of superpage at boot instead of compile time.	2019-01-18 13:35:06 +00:00
vm_reserv.h	Lock reservations with a dedicated lock in each reservation. Protect the	2018-03-22 19:21:11 +00:00
vm_swapout_dummy.c	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
vm_swapout.c	linuxkpi: Use pageproc instead of vmproc	2018-11-21 04:34:18 +00:00
vm_unix.c	i386: honor kern.elf32.read_exec for ommap(2) and break(2), as already	2019-02-09 03:56:48 +00:00
vm.h	Move vm_ndomains to vm.h where it can be used with a single header include	2018-03-27 03:27:02 +00:00
vnode_pager.c	Fix incorrect assertion in vnode_pager_generic_getpages()	2019-02-26 04:50:46 +00:00
vnode_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00