lmb_add_region handles overlapping regions wrong: instead of merging or rejecting to add a new reserved region that overlaps an existing one, it just adds the new region.
Since internally the same function is used for lmb_alloc, change lmb_add_region to reject overlapping regions.
Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com ---
Changes in v2: None
lib/lmb.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/lib/lmb.c b/lib/lmb.c index 1705417348..8dc703d996 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -136,6 +136,9 @@ static long lmb_add_region(struct lmb_region *rgn, phys_addr_t base, phys_size_t rgn->region[i].size += size; coalesced++; break; + } else if (lmb_addrs_overlap(base, size, rgnbase, rgnsize)) { + /* regions overlap */ + return -1; } }