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opnsense-src/sys/vm
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Mark Johnston 88642d978a vm_fault: Fix vm_fault_populate()'s handling of VM_FAULT_WIRE 
vm_map_wire() works by calling vm_fault(VM_FAULT_WIRE) on each page in
the rage.  (For largepage mappings, it calls vm_fault() once per large
page.)

A pager's populate method may return more than one page to be mapped.
If VM_FAULT_WIRE is also specified, we'd wire each page in the run, not
just the fault page.  Consider an object with two pages mapped in a
vm_map_entry, and suppose vm_map_wire() is called on the entry.  Then,
the first vm_fault() would allocate and wire both pages, and the second
would encounter a valid page upon lookup and wire it again in the
regular fault handler.  So the second page is wired twice and will be
leaked when the object is destroyed.

Fix the problem by modify vm_fault_populate() to wire only the fault
page.  Also modify the error handler for pmap_enter(psind=1) to not test
fs->wired, since it must be false.

PR:		260347
Reviewed by:	alc, kib
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D33416
2021-12-14 15:10:46 -05:00
..
_vm_phys.h vm_phys: Try to clean up NUMA KPIs 2020-11-19 03:59:21 +00:00
_vm_radix.h
default_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
device_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
memguard.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
memguard.h LinuxKPI: Implement ksize() function. 2020-08-29 19:26:31 +00:00
phys_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
pmap.h Add pmap_enter(9) PMAP_ENTER_LARGEPAGE flag and implement it on amd64. 2020-09-09 21:50:24 +00:00
redzone.c redzone: Raise a compile error if KASAN is configured 2021-07-23 10:47:13 -04:00
redzone.h
sg_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
swap_pager.c swapoff: add one more variant of the syscall 2021-12-09 02:48:46 +02:00
swap_pager.h swapoff: add one more variant of the syscall 2021-12-09 02:48:46 +02:00
uma.h Remove some remaining references to VM_ALLOC_NOOBJ 2021-10-19 21:22:56 -04:00
uma_core.c uma: remove unused *item argument from cache_free() 2021-12-05 10:44:47 -08:00
uma_dbg.c
uma_dbg.h
uma_int.h Improve UMA cache reclamation. 2021-05-02 19:45:23 -04:00
vm.h tmpfs: dynamically register tmpfs pager 2021-05-13 20:13:34 +03:00
vm_domainset.c Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_domainset.h Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_dumpset.h minidump: Use the provided dump bitset 2021-11-19 15:05:52 -04:00
vm_extern.h Add vnode_pager_purge_range(9) KPI 2021-08-05 22:52:26 +08:00
vm_fault.c vm_fault: Fix vm_fault_populate()'s handling of VM_FAULT_WIRE 2021-12-14 15:10:46 -05:00
vm_glue.c Fix a common typo in syctl descriptions 2021-11-03 20:49:24 +01:00
vm_init.c Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
vm_kern.c vm_page: Handle VM_ALLOC_NORECLAIM in the contiguous page allocator 2021-11-11 14:26:41 -05:00
vm_kern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_map.c setrlimit: Take stack gap into account. 2021-10-15 10:21:47 +02:00
vm_map.h setrlimit: Take stack gap into account. 2021-10-15 10:21:47 +02:00
vm_meter.c Use atomic loads/stores when updating td->td_state 2021-02-18 14:02:48 +00:00
vm_mmap.c ommap: fix signed len and pos arguments 2021-11-15 18:34:28 +00:00
vm_object.c vm: Add a mode to vm_object_page_remove() which skips invalid pages 2021-11-15 13:01:30 -05:00
vm_object.h vm: Add a mode to vm_object_page_remove() which skips invalid pages 2021-11-15 13:01:30 -05:00
vm_page.c vm_page: Tighten the object lock assertion in vm_page_invalid() 2021-12-05 10:51:11 -05:00
vm_page.h vm_page: Remove vm_page_sbusy() and vm_page_xbusy() 2021-11-15 13:01:30 -05:00
vm_pageout.c Fix a few typos in source code comments 2021-08-14 09:06:09 +02:00
vm_pageout.h Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_pagequeue.h vm_phys: Try to clean up NUMA KPIs 2020-11-19 03:59:21 +00:00
vm_pager.c vm_pager: Optimize an assertion 2021-11-15 13:01:30 -05:00
vm_pager.h vm: Add KPI to dynamically register pagers 2021-05-13 20:12:29 +03:00
vm_param.h (fault 3/9) Move map relookup into a dedicated function. 2020-01-23 05:07:01 +00:00
vm_phys.c minidump: De-duplicate is_dumpable() 2021-09-29 16:41:52 -03:00
vm_phys.h minidump: De-duplicate is_dumpable() 2021-09-29 16:41:52 -03:00
vm_radix.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vm_radix.h Use SMR to provide a safe unlocked lookup for vm_radix. 2020-02-19 19:58:31 +00:00
vm_reserv.c Set uninitialized popmap bits in vm_reserv_init 2021-12-05 17:17:25 -06:00
vm_reserv.h Fix locking in vm_reserv_reclaim_contig(). 2019-11-22 16:28:52 +00:00
vm_swapout.c Make vmdaemon timeout configurable 2021-10-17 13:49:29 +01:00
vm_swapout_dummy.c
vm_unix.c Prepare to handle non-trivial errors from vm_map_delete(). 2020-09-09 21:34:31 +00:00
vnode_pager.c Add vnode_pager_purge_range(9) KPI 2021-08-05 22:52:26 +08:00
vnode_pager.h vm pager: writemapping accounting for OBJT_SWAP 2019-09-03 20:31:48 +00:00