Date: Sat, 6 Mar 2021 20:04:59 GMT From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 859105d755ce - stable/11 - libkvm: Plug couple of memory leaks and check possible calloc(3) failure Message-ID: <202103062004.126K4xXj047752@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch stable/11 has been updated by jkim: URL: https://cgit.FreeBSD.org/src/commit/?id=859105d755ce0ead5ab356c67a6234b10650477f commit 859105d755ce0ead5ab356c67a6234b10650477f Author: Jung-uk Kim <jkim@FreeBSD.org> AuthorDate: 2021-03-03 23:10:00 +0000 Commit: Jung-uk Kim <jkim@FreeBSD.org> CommitDate: 2021-03-06 20:04:32 +0000 libkvm: Plug couple of memory leaks and check possible calloc(3) failure First, r204494 introduced dpcpu_off in struct __kvm and it was allocated from _kvm_dpcpu_init() but it was not free(3)'ed from kvm_close(3). Second, r291406 introduced kvm_nlist2(3) and converted kvm_nlist(3) to use the new function but it did not free the temporary buffer. Also, check possible calloc(3) failure while I am in the neighborhood. MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D29019 (cherry picked from commit 645eaa2ccaed6eea801d07d6a092974fc1713896) --- lib/libkvm/kvm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/lib/libkvm/kvm.c b/lib/libkvm/kvm.c index d6cc7d847ee6..66f38cef41f6 100644 --- a/lib/libkvm/kvm.c +++ b/lib/libkvm/kvm.c @@ -559,6 +559,8 @@ kvm_close(kvm_t *kd) free((void *) kd->argspc); if (kd->argv != 0) free((void *)kd->argv); + if (kd->dpcpu_initialized != 0) + free(kd->dpcpu_off); free((void *)kd); return (error); @@ -797,6 +799,10 @@ kvm_nlist(kvm_t *kd, struct nlist *nl) if (count == 0) return (0); kl = calloc(count + 1, sizeof(*kl)); + if (kl == NULL) { + _kvm_err(kd, kd->program, "cannot allocate memory"); + return (-1); + } for (i = 0; i < count; i++) kl[i].n_name = nl[i].n_name; nfail = kvm_nlist2(kd, kl); @@ -806,6 +812,7 @@ kvm_nlist(kvm_t *kd, struct nlist *nl) nl[i].n_desc = 0; nl[i].n_value = kl[i].n_value; } + free(kl); return (nfail); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202103062004.126K4xXj047752>