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63 lines
2.5 KiB
63 lines
2.5 KiB
8 months ago
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From dd7a5f4144bde111334582eafbc0f358e63854ea Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Fri, 1 Feb 2019 11:49:24 +0100
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Subject: [PATCH] analyze security: fix recursive call of
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syscall_names_in_filter()
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When `syscall_names_in_filter()` is called in itself, it is already
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examined with `whitelist`. Or, in other words, `syscall_names_in_filter()`
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returns bad or good in boolean. So, the returned value should not be
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compared with `whitelist` again.
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This replaces #11302.
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(cherry picked from commit 95832a0f8c2941df83e72dfc9d37eab20da8b1fa)
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Related: RHEL-5991
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---
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src/analyze/analyze-security.c | 24 +++++++++++-------------
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1 file changed, 11 insertions(+), 13 deletions(-)
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diff --git a/src/analyze/analyze-security.c b/src/analyze/analyze-security.c
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index 969101c57b..5ef5d52e75 100644
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--- a/src/analyze/analyze-security.c
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+++ b/src/analyze/analyze-security.c
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@@ -480,26 +480,24 @@ static bool syscall_names_in_filter(Set *s, bool whitelist, const SyscallFilterS
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const char *syscall;
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NULSTR_FOREACH(syscall, f->value) {
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- bool b;
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+ int id;
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if (syscall[0] == '@') {
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const SyscallFilterSet *g;
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- assert_se(g = syscall_filter_set_find(syscall));
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- b = syscall_names_in_filter(s, whitelist, g);
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- } else {
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-#if HAVE_SECCOMP
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- int id;
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- /* Let's see if the system call actually exists on this platform, before complaining */
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- id = seccomp_syscall_resolve_name(syscall);
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- if (id < 0)
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- continue;
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-#endif
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+ assert_se(g = syscall_filter_set_find(syscall));
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+ if (syscall_names_in_filter(s, whitelist, g))
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+ return true; /* bad! */
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- b = set_contains(s, syscall);
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+ continue;
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}
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- if (whitelist == b) {
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+ /* Let's see if the system call actually exists on this platform, before complaining */
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+ id = seccomp_syscall_resolve_name(syscall);
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+ if (id < 0)
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+ continue;
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+
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+ if (set_contains(s, syscall) == whitelist) {
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log_debug("Offending syscall filter item: %s", syscall);
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return true; /* bad! */
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}
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