Re: [libvirt] [PATCH v2] cgroup: reuse buffer for getline

Reuse the buffer for getline and track buffer allocation separately from the string length to prevent unlikely out-of-bounds memory access. This fixes the following leak that happened when zero bytes were read: ==404== 120 bytes in 1 blocks are definitely lost in loss record 1,344 of 1,671 ==404== at 0x4C2C71B: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==404== by 0x906F862: getdelim (iogetdelim.c:68) ==404== by 0x52A48FB: virCgroupPartitionNeedsEscaping (vircgroup.c:1136) ==404== by 0x52A0FB4: virCgroupPartitionEscape (vircgroup.c:1171) ==404== by 0x52A0EA4: virCgroupNewDomainPartition (vircgroup.c:1450) --- v1: cgroup: Free line even if no characters were read https://www.redhat.com/archives/libvir-list/2013-July/msg01030.html src/util/vircgroup.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)