Johan Almbladh 1d8f4447e8 bpf, arm: Fix register clobbering in div/mod implementation ... [ Upstream commit 79e3445b38e0cab94264a3894c0c3d57c930b97e ] On ARM CPUs that lack div/mod instructions, ALU32 BPF_DIV and BPF_MOD are implemented using a call to a helper function. Before, the emitted code for those function calls failed to preserve caller-saved ARM registers. Since some of those registers happen to be mapped to BPF registers, it resulted in eBPF register values being overwritten. This patch emits code to push and pop the remaining caller-saved ARM registers r2-r3 into the stack during the div/mod function call. ARM registers r0-r1 are used as arguments and return value, and those were already saved and restored correctly. Fixes: 39c13c204b ("arm: eBPF JIT compiler") Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-10-13 10:04:26 +02:00
..
alpha	alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile	2021-09-30 10:11:07 +02:00
arc	ARC: export clear_user_page() for modules	2021-09-22 12:28:04 +02:00
arm	bpf, arm: Fix register clobbering in div/mod implementation	2021-10-13 10:04:26 +02:00
arm64	arm64: dts: qcom: pm8150: use qcom,pm8998-pon binding	2021-10-13 10:04:25 +02:00
c6x
csky	csky: syscache: Fixup duplicate cache flush	2021-07-14 16:56:52 +02:00
h8300
hexagon	hexagon: use common DISCARDS macro	2021-07-20 16:05:53 +02:00
ia64	mm/page_alloc: fix memory map initialization for descending nodes	2021-07-25 14:36:18 +02:00
m68k	m68k: Double cast io functions to unsigned long	2021-09-30 10:11:06 +02:00
microblaze
mips	bpf, mips: Validate conditional branch offsets	2021-10-06 15:55:51 +02:00
nds32	nds32: fix up stack guard gap	2021-07-28 14:35:46 +02:00
nios2	nios2: fixed broken sys_clone syscall	2021-03-04 11:38:16 +01:00
openrisc	openrisc: don't printk() unconditionally	2021-09-18 13:40:13 +02:00
parisc	parisc: Use absolute_pointer() to define PAGE0	2021-09-30 10:11:07 +02:00
powerpc	KVM: PPC: Book3S HV: Tolerate treclaim. in fake-suspend mode changing registers	2021-09-22 12:27:59 +02:00
riscv	riscv: Flush current cpu icache before other cpus	2021-10-13 10:04:24 +02:00
s390	s390/pci_mmio: fully validate the VMA before calling follow_pte()	2021-09-26 14:08:55 +02:00
sh	sched/core: Initialize the idle task with preemption disabled	2021-07-14 16:55:50 +02:00
sparc	sparc64: fix pci_iounmap() when CONFIG_PCI is not set	2021-10-09 14:40:56 +02:00
um	um: virtio_uml: fix memory leak on init failures	2021-09-26 14:08:57 +02:00
x86	perf/x86: Reset destroy callback on event init failure	2021-10-09 14:40:58 +02:00
xtensa	xtensa: call irqchip_init only when CONFIG_USE_OF is selected	2021-10-13 10:04:26 +02:00
.gitignore
Kconfig