diff options
Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/KVM/1687653')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/KVM/1687653 | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/KVM/1687653 b/results/classifier/deepseek-2-tmp/output/KVM/1687653 deleted file mode 100644 index 5e2955862..000000000 --- a/results/classifier/deepseek-2-tmp/output/KVM/1687653 +++ /dev/null @@ -1,66 +0,0 @@ - -QEMU-KVM / detect_zeroes causes KVM to start unlimited number of threads on Guest-Sided High-IO with big Blocksize - -QEMU-KVM in combination with "detect_zeroes=on" makes a Guest able to DoS the Host. This is possible if the Host itself has "detect_zeroes" enabled and the Guest writes a large Chunk of data with a huge blocksize onto the drive. - -E.g.: dd if=/dev/zero of=/tmp/DoS bs=1G count=1 oflag=direct - -All QEMU-Versions after implementation of detect_zeroes are affected. Prior are unaffected. This is absolutely critical, please fix this ASAP! - -##### - -Provided by Dominik Csapak: - -source , bs , count , O_DIRECT, behaviour - -urandom , bs 1M, count 1024, O_DIRECT: OK -file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1M, count 1024, O_DIRECT: OK -zero file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1G, count 1, O_DIRECT: NOT OK -zero file , bs 1G, count 1, O_DIRECT: NOT OK -zero file , bs 1G, count 1, no O_DIRECT: NOT OK -rand file , bs 1G, count 1, O_DIRECT: OK -rand file , bs 1G, count 1, no O_DIRECT: OK - -discard on: - -urandom , bs 1M, count 1024, O_DIRECT: OK -rand file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1M, count 1024, O_DIRECT: OK -zero file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1G, count 1, O_DIRECT: NOT OK -zero file , bs 1G, count 1, O_DIRECT: NOT OK -zero file , bs 1G, count 1, no O_DIRECT: NOT OK -rand file , bs 1G, count 1, O_DIRECT: OK -rand file , bs 1G, count 1, no O_DIRECT: OK - -detect_zeros off: - -urandom , bs 1M, count 1024, O_DIRECT: OK -rand file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1M, count 1024, O_DIRECT: OK -zero file , bs 1M, count 1024, O_DIRECT: OK -/dev/zero , bs 1G, count 1, O_DIRECT: OK -zero file , bs 1G, count 1, O_DIRECT: OK -zero file , bs 1G, count 1, no O_DIRECT: OK -rand file , bs 1G, count 1, O_DIRECT: OK -rand file , bs 1G, count 1, no O_DIRECT: OK - -##### - -Provided by Florian Strankowski - -bs - count - io-threads - -512K - 2048 - 2 -1M - 1024 - 2 -2M - 512 - 4 -4M - 256 - 6 -8M - 128 - 10 -16M - 64 - 18 -32M - 32 - uncountable - -Please refer to further information here: - -https://bugzilla.proxmox.com/show_bug.cgi?id=1368 \ No newline at end of file |