https://github.com/torvalds/linux
Revision 15035388439f892017d38b05214d3cda6578af64 authored by Steven Rostedt (VMware) on 09 November 2018, 20:22:07 UTC, committed by Borislav Petkov on 09 November 2018, 20:39:14 UTC
When running function tracing on a Linux guest running on VMware
Workstation, the guest would crash. This is due to tracing of the
sched_clock internal call of the VMware vmware_sched_clock(), which
causes an infinite recursion within the tracing code (clock calls must
not be traced).

Make vmware_sched_clock() not traced by ftrace.

Fixes: 80e9a4f21fd7c ("x86/vmware: Add paravirt sched clock")
Reported-by: GwanYeong Kim <gy741.kim@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
CC: Alok Kataria <akataria@vmware.com>
CC: GwanYeong Kim <gy741.kim@gmail.com>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
CC: Thomas Gleixner <tglx@linutronix.de>
CC: virtualization@lists.linux-foundation.org
CC: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20181109152207.4d3e7d70@gandalf.local.home
1 parent a48777f
History
Tip revision: 15035388439f892017d38b05214d3cda6578af64 authored by Steven Rostedt (VMware) on 09 November 2018, 20:22:07 UTC
x86/cpu/vmware: Do not trace vmware_sched_clock()
Tip revision: 1503538

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