Vineet Gupta a7443bebde ARC: stack unwinding: avoid indefinite looping ... commit 328d2168ca upstream. Currently stack unwinder is a while(1) loop which relies on the dwarf unwinder to signal termination, which in turn relies on dwarf info to do so. This in theory could cause an infinite loop if the dwarf info was somehow messed up or the register contents were etc. This fix thus detects the excessive looping and breaks the loop. | Mem: 26184K used, 1009136K free, 0K shrd, 0K buff, 14416K cached | CPU: 0.0% usr 72.8% sys 0.0% nic 27.1% idle 0.0% io 0.0% irq 0.0% sirq | Load average: 4.33 2.60 1.11 2/74 139 | PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND | 133 2 root SWN 0 0.0 3 22.9 [rcu_torture_rea] | 132 2 root SWN 0 0.0 0 22.0 [rcu_torture_rea] | 131 2 root SWN 0 0.0 3 21.5 [rcu_torture_rea] | 126 2 root RW 0 0.0 2 5.4 [rcu_torture_wri] | 129 2 root SWN 0 0.0 0 0.2 [rcu_torture_fak] | 137 2 root SW 0 0.0 0 0.2 [rcu_torture_cbf] | 127 2 root SWN 0 0.0 0 0.1 [rcu_torture_fak] | 138 115 root R 1464 0.1 2 0.1 top | 130 2 root SWN 0 0.0 0 0.1 [rcu_torture_fak] | 128 2 root SWN 0 0.0 0 0.1 [rcu_torture_fak] | 115 1 root S 1472 0.1 1 0.0 -/bin/sh | 104 1 root S 1464 0.1 0 0.0 inetd | 1 0 root S 1456 0.1 2 0.0 init | 78 1 root S 1456 0.1 0 0.0 syslogd -O /var/log/messages | 134 2 root SW 0 0.0 2 0.0 [rcu_torture_sta] | 10 2 root IW 0 0.0 1 0.0 [rcu_preempt] | 88 2 root IW 0 0.0 1 0.0 [kworker/1:1-eve] | 66 2 root IW 0 0.0 2 0.0 [kworker/2:2-eve] | 39 2 root IW 0 0.0 2 0.0 [kworker/2:1-eve] | unwinder looping too long, aborting ! Cc: <stable@vger.kernel.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-11-10 12:36:01 +01:00
..
alpha	alpha: fix annotation of io{read,write}{16,32}be()	2020-08-26 10:31:02 +02:00
arc	ARC: stack unwinding: avoid indefinite looping	2020-11-10 12:36:01 +01:00
arm	ARM: dts: sun4i-a10: fix cpu_alert temperature	2020-11-10 12:35:59 +01:00
arm64	KVM: arm64: Fix AArch32 handling of DBGD{CCINT,SCRext} and DBGVCR	2020-11-05 11:08:55 +01:00
c6x	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
h8300	h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-	2019-04-05 22:32:55 +02:00
hexagon	hexagon: define ioremap_uc	2020-05-10 10:30:11 +02:00
ia64	ia64: fix build error with !COREDUMP	2020-11-05 11:08:52 +01:00
m68k	m68k: q40: Fix info-leak in rtc_ioctl	2020-10-01 13:14:24 +02:00
microblaze	microblaze: Prevent the overflow of the start	2020-02-24 08:34:53 +01:00
mips	MIPS: Add the missing 'CPU_1074K' into __get_cpu_type()	2020-10-01 13:14:53 +02:00
nds32	nds32: Fix the items of hwcap_str ordering issue.	2019-12-13 08:51:35 +01:00
nios2	nios2: ksyms: Add missing symbol exports	2020-01-27 14:50:30 +01:00
openrisc	openrisc: Fix cache API compile issue when not inlining	2020-09-23 12:10:58 +02:00
parisc	parisc: Implement __smp_store_release and __smp_load_acquire barriers	2020-08-19 08:15:07 +02:00
powerpc	powerpc: Fix undetected data corruption with P9N DD2.1 VSX CI load emulation	2020-11-05 11:08:51 +01:00
riscv	riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO	2020-11-05 11:08:41 +01:00
s390	s390/stp: add locking to sysfs functions	2020-11-05 11:08:51 +01:00
sh	sh: landisk: Add missing initialization of sh_io_port_base	2020-08-21 11:05:39 +02:00
sparc	sparc64: remove mm_cpumask clearing to fix kthread_use_mm race	2020-11-05 11:08:38 +01:00
um	um: change sigio_spinlock to a mutex	2020-11-05 11:08:39 +01:00
unicore32	mm: convert return type of handle_mm_fault() caller to vm_fault_t	2018-08-17 16:20:28 -07:00
x86	x86/kexec: Use up-to-dated screen_info copy to fill boot params	2020-11-10 12:35:59 +01:00
xtensa	xtensa: fix xtensa_pmu_setup prototype	2020-08-21 11:05:31 +02:00
.gitignore
Kconfig	mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race	2020-11-05 11:08:38 +01:00