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Bug #1829242 correction.

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Added type conversions to ram_addr_t before all left shifts of page
indexes to TARGET_PAGE_BITS, to correct overflows when the page
address was 4Gb and more.

Signed-off-by: Alexey Romko <nevilad@yahoo.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Alexey Romko 2020-01-10 14:51:34 +01:00 committed by Juan Quintela
parent 9560a48ecc
commit 8bba004cca
1 changed files with 18 additions and 11 deletions
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29
migration/ram.c
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@ -1768,7 +1768,7 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs,
if (rb->clear_bmap && clear_bmap_test_and_clear(rb, page)) {
uint8_t shift = rb->clear_bmap_shift;
hwaddr size = 1ULL << (TARGET_PAGE_BITS + shift);
hwaddr start = (page << TARGET_PAGE_BITS) & (-size);
hwaddr start = (((ram_addr_t)page) << TARGET_PAGE_BITS) & (-size);
/*
* CLEAR_BITMAP_SHIFT_MIN should always guarantee this... this
@ -2005,7 +2005,7 @@ static void ram_release_pages(const char *rbname, uint64_t offset, int pages)
return;
}
ram_discard_range(rbname, offset, pages << TARGET_PAGE_BITS);
ram_discard_range(rbname, offset, ((ram_addr_t)pages) << TARGET_PAGE_BITS);
}
/*
@ -2093,7 +2093,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
uint8_t *p;
bool send_async = true;
RAMBlock *block = pss->block;
ram_addr_t offset = pss->page << TARGET_PAGE_BITS;
ram_addr_t offset = ((ram_addr_t)pss->page) << TARGET_PAGE_BITS;
ram_addr_t current_addr = block->offset + offset;
p = block->host + offset;
@ -2280,7 +2280,8 @@ static bool find_dirty_block(RAMState *rs, PageSearchStatus *pss, bool *again)
*again = false;
return false;
}
if ((pss->page << TARGET_PAGE_BITS) >= pss->block->used_length) {
if ((((ram_addr_t)pss->page) << TARGET_PAGE_BITS)
>= pss->block->used_length) {
/* Didn't find anything in this RAM Block */
pss->page = 0;
pss->block = QLIST_NEXT_RCU(pss->block, next);
@ -2571,7 +2572,7 @@ static int ram_save_target_page(RAMState *rs, PageSearchStatus *pss,
bool last_stage)
{
RAMBlock *block = pss->block;
ram_addr_t offset = pss->page << TARGET_PAGE_BITS;
ram_addr_t offset = ((ram_addr_t)pss->page) << TARGET_PAGE_BITS;
int res;
if (control_save_page(rs, block, offset, &res)) {
@ -2657,7 +2658,8 @@ static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss,
/* Allow rate limiting to happen in the middle of huge pages */
migration_rate_limit();
} while ((pss->page & (pagesize_bits - 1)) &&
offset_in_ramblock(pss->block, pss->page << TARGET_PAGE_BITS));
offset_in_ramblock(pss->block,
((ram_addr_t)pss->page) << TARGET_PAGE_BITS));
/* The offset we leave with is the last one we looked at */
pss->page--;
@ -2874,8 +2876,10 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
while (run_start < range) {
unsigned long run_end = find_next_bit(bitmap, range, run_start + 1);
ram_discard_range(block->idstr, run_start << TARGET_PAGE_BITS,
(run_end - run_start) << TARGET_PAGE_BITS);
ram_discard_range(block->idstr,
((ram_addr_t)run_start) << TARGET_PAGE_BITS,
((ram_addr_t)(run_end - run_start))
<< TARGET_PAGE_BITS);
run_start = find_next_zero_bit(bitmap, range, run_end + 1);
}
}
@ -4273,13 +4277,16 @@ static void colo_flush_ram_cache(void)
while (block) {
offset = migration_bitmap_find_dirty(ram_state, block, offset);
if (offset << TARGET_PAGE_BITS >= block->used_length) {
if (((ram_addr_t)offset) << TARGET_PAGE_BITS
>= block->used_length) {
offset = 0;
block = QLIST_NEXT_RCU(block, next);
} else {
migration_bitmap_clear_dirty(ram_state, block, offset);
dst_host = block->host + (offset << TARGET_PAGE_BITS);
src_host = block->colo_cache + (offset << TARGET_PAGE_BITS);
dst_host = block->host
+ (((ram_addr_t)offset) << TARGET_PAGE_BITS);
src_host = block->colo_cache
+ (((ram_addr_t)offset) << TARGET_PAGE_BITS);
memcpy(dst_host, src_host, TARGET_PAGE_SIZE);
}
}