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[Qemu-devel] [Bug 1462944] Re: vpc file causes qemu-img to consume lots
From: |
Launchpad Bug Tracker |
Subject: |
[Qemu-devel] [Bug 1462944] Re: vpc file causes qemu-img to consume lots of time and memory |
Date: |
Tue, 14 Aug 2018 04:17:31 -0000 |
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1462944
Title:
vpc file causes qemu-img to consume lots of time and memory
Status in QEMU:
Expired
Bug description:
The attached vpc file causes 'qemu-img info' to consume 3 or 4 seconds
of CPU time and 1.3 GB of heap, causing a minor denial of service.
$ /usr/bin/time ~/d/qemu/qemu-img info afl12.img
block-vpc: The header checksum of 'afl12.img' is incorrect.
qemu-img: Could not open 'afl12.img': block-vpc: free_data_block_offset
points after the end of file. The image has been truncated.
1.19user 3.15system 0:04.35elapsed 99%CPU (0avgtext+0avgdata
1324504maxresident)k
0inputs+0outputs (0major+327314minor)pagefaults 0swaps
The file was found using american-fuzzy-lop.
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