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| author | Brad Hubbard <bhubbard@redhat.com> | 2015-03-18 14:51:26 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2015-03-18 14:51:26 +0530 |
| commit | ed6b0fe710b631b99ed9fc28cefedfe69a16dc55 (patch) | |
| tree | 5b682e438c37f4be767bc25daf630e90b455451d /sysdeps/generic/libnss_files.abilist | |
| parent | f8aeae347377f3dfa8cbadde057adf1827fb1d44 (diff) | |
| download | glibc-ed6b0fe710b631b99ed9fc28cefedfe69a16dc55.tar.gz glibc-ed6b0fe710b631b99ed9fc28cefedfe69a16dc55.tar.xz glibc-ed6b0fe710b631b99ed9fc28cefedfe69a16dc55.zip | |
Use calloc to allocate xports (BZ #17542)
If xports is NULL in xprt_register we malloc it but if sock > _rpc_dtablesize() that memory does not get initialised and may in theory contain any value. Later we make a conditional jump in svc_getreq_common based on the uninitialised memory and this caused a general protection fault in rpc.statd on an older version of glibc but this code has not changed since that version. Following is the valgrind warning. ==26802== Conditional jump or move depends on uninitialised value(s) ==26802== at 0x5343A25: svc_getreq_common (in /lib64/libc-2.5.so) ==26802== by 0x534357B: svc_getreqset (in /lib64/libc-2.5.so) ==26802== by 0x10DE1F: ??? (in /sbin/rpc.statd) ==26802== by 0x10D0EF: main (in /sbin/rpc.statd) ==26802== Uninitialised value was created by a heap allocation ==26802== at 0x4C2210C: malloc (vg_replace_malloc.c:195) ==26802== by 0x53438BE: xprt_register (in /lib64/libc-2.5.so) ==26802== by 0x53450DF: svcudp_bufcreate (in /lib64/libc-2.5.so) ==26802== by 0x10FE32: ??? (in /sbin/rpc.statd) ==26802== by 0x10D13E: main (in /sbin/rpc.statd)
Diffstat (limited to 'sysdeps/generic/libnss_files.abilist')
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