lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 12 Mar 2010 09:54:42 GMT From: tip-bot for Cyrill Gorcunov <gorcunov@...il.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, eranian@...gle.com, acme@...hat.com, hpa@...or.com, mingo@...hat.com, gorcunov@...nvz.org, peterz@...radead.org, gorcunov@...il.com, fweisbec@...il.com, robert.richter@....com, ming.m.lin@...el.com, tglx@...utronix.de, mingo@...e.hu Subject: [tip:perf/x86] x86, perf: Fix NULL deref on not assigned x86_pmu Commit-ID: 0b861225a5890f22445f08ca9cc7a87cff276ff7 Gitweb: http://git.kernel.org/tip/0b861225a5890f22445f08ca9cc7a87cff276ff7 Author: Cyrill Gorcunov <gorcunov@...il.com> AuthorDate: Fri, 12 Mar 2010 00:50:16 +0300 Committer: Ingo Molnar <mingo@...e.hu> CommitDate: Fri, 12 Mar 2010 10:18:42 +0100 x86, perf: Fix NULL deref on not assigned x86_pmu In case of not assigned x86_pmu and software events NULL dereference may being hit via x86_pmu::schedule_events method. Fix it by checking if x86_pmu is initialized at all. Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org> Cc: Lin Ming <ming.m.lin@...el.com> Cc: Arnaldo Carvalho de Melo <acme@...hat.com> Cc: Stephane Eranian <eranian@...gle.com> Cc: Robert Richter <robert.richter@....com> Cc: Frederic Weisbecker <fweisbec@...il.com> Cc: Peter Zijlstra <peterz@...radead.org> LKML-Reference: <20100311215016.GG25162@...ovo> Signed-off-by: Ingo Molnar <mingo@...e.hu> --- arch/x86/kernel/cpu/perf_event.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index e6a3f5f..5586a02 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1269,6 +1269,9 @@ int hw_perf_group_sched_in(struct perf_event *leader, int assign[X86_PMC_IDX_MAX]; int n0, n1, ret; + if (!x86_pmu_initialized()) + return 0; + /* n0 = total number of events */ n0 = collect_events(cpuc, leader, true); if (n0 < 0) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists