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vm_map: do not allow to merge stack gap entries

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At least, offset handling is wrong for them.

Reviewed by:	alc, markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D41099
This commit is contained in:
Konstantin Belousov 2023-07-25 21:48:57 +03:00
parent 55be6be12c
commit 9d7ea6cff7
1 changed files with 2 additions and 1 deletions
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3
sys/vm/vm_map.c
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@ -2293,7 +2293,8 @@ vm_map_find_min(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
* another entry.
*/
#define MAP_ENTRY_NOMERGE_MASK (MAP_ENTRY_GROWS_DOWN | MAP_ENTRY_GROWS_UP | \
MAP_ENTRY_IN_TRANSITION | MAP_ENTRY_IS_SUB_MAP | MAP_ENTRY_VN_EXEC)
MAP_ENTRY_IN_TRANSITION | MAP_ENTRY_IS_SUB_MAP | MAP_ENTRY_VN_EXEC | \
MAP_ENTRY_STACK_GAP_UP | MAP_ENTRY_STACK_GAP_DN)
static bool
vm_map_mergeable_neighbors(vm_map_entry_t prev, vm_map_entry_t entry)