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From 299e344b245e8d1b3a31a58275e0e8d0aa01ed77 Mon Sep 17 00:00:00 2001
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From: Evgeny Kolesnikov <ekolesni@redhat.com>
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Date: Sat, 8 Jul 2023 07:05:31 +0200
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Subject: [PATCH] OVAL/sysctl: Fix offline mode
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The initial implementation was buggy: after correctly traversing
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prefixed PREFIX/proc/sys directory tree it would incorrectly read
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the data from the non-prefixed directory tree.
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---
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src/OVAL/probes/unix/sysctl_probe.c | 13 ++++++++++---
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1 file changed, 10 insertions(+), 3 deletions(-)
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diff --git a/src/OVAL/probes/unix/sysctl_probe.c b/src/OVAL/probes/unix/sysctl_probe.c
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index 65d4bd0609..b7c68a0378 100644
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--- a/src/OVAL/probes/unix/sysctl_probe.c
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+++ b/src/OVAL/probes/unix/sysctl_probe.c
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@@ -150,10 +150,14 @@ int sysctl_probe_main(probe_ctx *ctx, void *probe_arg)
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while ((ofts_ent = oval_fts_read(ofts)) != NULL) {
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SEXP_t *se_mib;
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char mibpath[PATH_MAX], *mib;
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- size_t miblen;
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+ size_t miblen, mibstart;
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struct stat file_stat;
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- snprintf(mibpath, sizeof mibpath, "%s/%s", ofts_ent->path, ofts_ent->file);
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+ if (prefix != NULL) {
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+ snprintf(mibpath, sizeof mibpath, "%s/%s/%s", prefix, ofts_ent->path, ofts_ent->file);
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+ } else {
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+ snprintf(mibpath, sizeof mibpath, "%s/%s", ofts_ent->path, ofts_ent->file);
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+ }
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/* Skip write-only files, eg. /proc/sys/net/ipv4/route/flush */
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if (stat(mibpath, &file_stat) == -1) {
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@@ -168,7 +172,10 @@ int sysctl_probe_main(probe_ctx *ctx, void *probe_arg)
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continue;
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}
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- mib = strdup(mibpath + strlen(PROC_SYS_DIR) + 1);
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+ mibstart = 0;
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+ mibstart += prefix != NULL ? strlen(prefix)+1 : 0;
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+ mibstart += strlen(PROC_SYS_DIR)+1;
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+ mib = strdup(mibpath + mibstart);
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miblen = strlen(mib);
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while (miblen > 0) {
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