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opnsense-src/sys/vm
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Mark Johnston 0fc6eebbf7 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
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit 88642d978a)
2021-12-27 19:36:07 -05:00
..
_vm_phys.h vm_phys: Try to clean up NUMA KPIs 2020-11-19 03:59:21 +00:00
_vm_radix.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
default_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-22 12:38:30 +03:00
device_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-22 12:38:30 +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 2021-05-22 12:38:30 +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 2021-11-01 10:07:31 -04:00
redzone.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
sg_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-22 12:38:30 +03:00
swap_pager.c swapoff: add one more variant of the syscall 2021-12-20 02:29:11 +02:00
swap_pager.h swapoff: add one more variant of the syscall 2021-12-20 02:29:11 +02:00
uma.h uma: Add KASAN state transitions 2021-11-01 10:02:54 -04:00
uma_core.c uma: Fix handling of reserves in zone_import() 2021-11-15 09:07:10 -05:00
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 Improve UMA cache reclamation. 2021-05-15 22:10:48 -04:00
vm.h tmpfs: dynamically register tmpfs pager 2021-05-22 12:38:30 +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 2021-12-03 10:02:03 -04:00
vm_extern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_fault.c vm_fault: Fix vm_fault_populate()'s handling of VM_FAULT_WIRE 2021-12-27 19:36:07 -05:00
vm_glue.c Fix a common typo in syctl descriptions 2021-11-06 08:52:57 +01:00
vm_init.c Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
vm_kern.c Convert vm_page_alloc() callers to use vm_page_alloc_noobj(). 2021-11-03 13:39:36 -04:00
vm_kern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_map.c Add OBJT_SWAP_TMPFS pager 2021-05-22 12:38:29 +03:00
vm_map.h vm_map_protect: allow to set prot and max_prot in one go. 2021-01-13 01:35:22 +02:00
vm_meter.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vm_mmap.c Add OBJT_SWAP_TMPFS pager 2021-05-22 12:38:29 +03:00
vm_object.c vm_page: Consolidate page busy sleep mechanisms 2021-11-29 09:11:29 -05:00
vm_object.h vm: Add a mode to vm_object_page_remove() which skips invalid pages 2021-11-29 09:09:28 -05:00
vm_page.c vm_page: Tighten the object lock assertion in vm_page_invalid() 2021-12-13 08:26:34 -05:00
vm_page.h vm_page: Remove vm_page_sbusy() and vm_page_xbusy() 2021-11-29 09:11:37 -05:00
vm_pageout.c Fix a few typos in source code comments 2021-08-19 09:29:50 +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 2021-11-22 08:44:08 -05:00
vm_pager.h vm: Add KPI to dynamically register pagers 2021-05-22 12:38:30 +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() 2021-10-15 12:20:48 -03:00
vm_phys.h minidump: De-duplicate is_dumpable() 2021-10-15 12:20:48 -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 Correct type size format error in KASSERT. 2021-12-23 02:02:42 -06:00
vm_reserv.h Fix locking in vm_reserv_reclaim_contig(). 2019-11-22 16:28:52 +00:00
vm_swapout.c Use a single VM object for kernel stacks. 2020-04-26 20:08:57 +00:00
vm_swapout_dummy.c SPDX: Consider code from Carnegie-Mellon University. 2017-11-30 15:48:35 +00:00
vm_unix.c Prepare to handle non-trivial errors from vm_map_delete(). 2020-09-09 21:34:31 +00:00
vnode_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-22 12:38:30 +03:00
vnode_pager.h vm pager: writemapping accounting for OBJT_SWAP 2019-09-03 20:31:48 +00:00