Limit memory usage when running qemu-img convert

Code Issues Proposed changes

This patch is limiting the memory address space to 1 GiB when invoking
qemu-img convert. The qemu-img command can be exploited so we better
play on the safe side (See: bug #1449062).
Change-Id: I2088f74b32d1392310c569cfaa7fd368cb737421
Closes-Bug: #1657808

This commit is contained in:

Lucas Alvares Gomes

2017年01月19日 17:16:38 +00:00

parent 7680625994

commit 449cda4fed

2 changed files with 8 additions and 0 deletions

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3
ironic_python_agent/shell/write_image.sh

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@@ -39,6 +39,9 @@ log "Erasing existing GPT and MBR data structures from ${DEVICE}"

sgdisk -Z $DEVICE

log "Imaging $IMAGEFILE to $DEVICE"

# limit the memory usage for qemu-img to 1 GiB

ulimit -v 1048576

qemu-img convert -t directsync -O host_device $IMAGEFILE $DEVICE

sync

5
releasenotes/notes/limit-qemu-img-ram-usage-d7b7a16ac5e9c917.yaml Normal file

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@@ -0,0 +1,5 @@

---

fixes:

- |

Limits the memory usage of ``qemu-img convert`` command to 1 GiB to

avoid it from causing the host machine to fail due not enough ram.