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 DdQYKVmV 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See process maps in the log. While it claims to be using 0x22 (MAP_PRIVATE | MAP_ANONYMOUS) for the flags, it really uses 0x40 (MAP_32BIT) as well, as shown by strace: > mmap(NULL, 131072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0) = 0x40720000 > mmap(NULL, 131072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0) = 0x4124e000 > mmap(NULL, 131072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0) = -1 ENOMEM (Cannot allocate memory) > dex2oatd F 03-01 10:32:33 74063 74063 mem_map_arena_pool.cc:65] Check failed: map.IsValid() Failed anonymous mmap((nil), 131072, 0x3, 0x22, -1, 0): Cannot allocate memory. See process maps in the log. Here's a simple reproducer, which (if my math is correct) tries to mmap a total of ~600MiB in increasing chunk sizes: #include #include #include int main() { size_t total_leaks = 0; for (int shift=12; shift<=16; shift++) { size_t size = ((size_t)1)< $ ./mmap-test > Failed. m=0xffffffffffffffff size=4096 (1<<12) i=1500 errno=12 total_leaks=6144000 (5 MiB) > $ ./mmap-test > Failed. m=0xffffffffffffffff size=4096 (1<<12) i=620 errno=12 total_leaks=2539520 (2 MiB) > $ ./mmap-test > Failed. m=0xffffffffffffffff size=4096 (1<<12) i=2408 errno=12 total_leaks=9863168 (9 MiB) > $ ./mmap-test > Failed. m=0xffffffffffffffff size=4096 (1<<12) i=774 errno=12 total_leaks=3170304 (3 MiB) > $ ./mmap-test > Failed. m=0xffffffffffffffff size=4096 (1<<12) i=1648 errno=12 total_leaks=6750208 (6 MiB) > $ ./mmap-test I have checked a more recent master commit (ee3f96b1, from March 1st), and the problem is still there. Bisecting shows that e15e06a8 is the last good commit, and that 524e00b3 is the first one failing in this way. The 10 or so commits in between run into a page fault BUG down in vma_merge() instead. This range of commits is about the same as mentioned in https://lore.kernel.org/lkml/0b9f5425-08d4-8013-aa4c-e620c3b10bb2@leemhuis.info/, so I assume that my problem, too, was introduced with the Maple Tree changes. Sending this to the same people and lists. //Snild