linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-11 07:39:47 +00:00

History

Alex Gartrell 24b4d2abd0 ebpf: Allow dereferences of PTR_TO_STACK registers

mov %rsp, %r1           ; r1 = rsp
        add $-8, %r1            ; r1 = rsp - 8
        store_q $123, -8(%rsp)  ; *(u64*)r1 = 123  <- valid
        store_q $123, (%r1)     ; *(u64*)r1 = 123  <- previously invalid
        mov $0, %r0
        exit                    ; Always need to exit

And we'd get the following error:

	0: (bf) r1 = r10
	1: (07) r1 += -8
	2: (7a) *(u64 *)(r10 -8) = 999
	3: (7a) *(u64 *)(r1 +0) = 999
	R1 invalid mem access 'fp'

	Unable to load program

We already know that a register is a stack address and the appropriate
offset, so we should be able to validate those references as well.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2015-07-27 00:54:10 -07:00

bpf

ebpf: Allow dereferences of PTR_TO_STACK registers

2015-07-27 00:54:10 -07:00

hidraw

HID: samples/hidraw: make it possible to select device

2015-03-15 10:11:21 -04:00

hw_breakpoint

perf: Add context field to perf_event

2011-07-01 11:06:38 +02:00

kdb

kdb: Add kdb kernel module sample