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Diffstat (limited to 'results/classifier/zero-shot/108/other/1687')
| -rw-r--r-- | results/classifier/zero-shot/108/other/1687 | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/results/classifier/zero-shot/108/other/1687 b/results/classifier/zero-shot/108/other/1687 new file mode 100644 index 000000000..f7c28e995 --- /dev/null +++ b/results/classifier/zero-shot/108/other/1687 @@ -0,0 +1,68 @@ +graphic: 0.840 +device: 0.833 +PID: 0.726 +semantic: 0.651 +permissions: 0.603 +debug: 0.560 +vnc: 0.552 +performance: 0.476 +socket: 0.329 +network: 0.311 +boot: 0.128 +files: 0.102 +other: 0.044 +KVM: 0.042 + +Memory leak for x86 guest on macOS ARM host +Description of problem: +QEMU is used by docker to run `x86` binaries on Apple silicon. Then using `mmap` followed by `munmap` results in a memory leak manifested by continuously growing RSS memory usage when running `mmap` and `munmap` in a loop, e.g., when running the following binary: + +``` +#include <stdio.h> +#include <unistd.h> +#include <sys/mman.h> + +const int page = 4096; + +int work(int N) { + int *ptr = mmap(NULL, N * sizeof(int), PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + + if (ptr == MAP_FAILED) { + printf("Mapping Failed\n"); + return 1; + } + + for(int i = 0; i < N; i++) { + ptr[i] = i * 10; + } + + int err = munmap(ptr, N * sizeof(int)); + if (err != 0) { + printf("UnMapping Failed\n"); + return 1; + } + + return 0; +} + +int main() { + int N = page * 1024; + + while (1) { + int res = work(N); + if (res) { + return res; + } + printf(".\n"); + } + + return 0; +} +``` +Steps to reproduce: +``` +$ LEAK=$(docker run --platform linux/amd64 -d -it martin2718/mmap-leak ./a.out) +$ docker exec -it $LEAK top # you should observe that RES for a.out keeps growing +$ docker exec -it $LEAK pmap -x 1 # you should see a single memory mapping whose RSS memory usage keeps growing +$ docker kill $LEAK # abort the experiment +``` |