On Mon, Apr 30, 2018 at 06:28:13PM -0400, Jiong Wang wrote: > > There is no functional change by this patch set. > No bpf selftest regression found after this patch set.
I was about to apply them, but there is a regression: [ 27.773899] ================================================================== [ 27.774802] BUG: KASAN: slab-out-of-bounds in do_jit+0x5499/0x6020 [ 27.775559] Read of size 4 at addr ffff8801197fe7f4 by task test_verifier/344 [ 27.776412] [ 27.776607] CPU: 3 PID: 344 Comm: test_verifier Not tainted 4.17.0-rc2-00451-geb43cb64a84a #943 [ 27.777644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.el7.centos 04/01/2014 [ 27.778894] Call Trace: [ 27.779217] dump_stack+0x5b/0x8b [ 27.779675] ? do_jit+0x5499/0x6020 [ 27.780148] print_address_description+0x73/0x290 [ 27.780716] ? do_jit+0x5499/0x6020 [ 27.781152] kasan_report+0x22b/0x350 [ 27.781602] do_jit+0x5499/0x6020 [ 27.782020] ? __mod_node_page_state+0xa2/0xd0 [ 27.782557] ? jit_fill_hole+0x20/0x20 [ 27.783019] ? ___slab_alloc+0x3e7/0x4d0 [ 27.783498] ? kasan_unpoison_shadow+0x30/0x40 [ 27.784042] ? kasan_kmalloc+0xa0/0xd0 [ 27.784497] ? __kmalloc+0x109/0x200 [ 27.784931] ? bpf_int_jit_compile+0x7ac/0xab0 [ 27.785475] bpf_int_jit_compile+0x2b6/0xab0 [ 27.786001] ? do_jit+0x6020/0x6020 [ 27.786428] ? kasan_kmalloc+0xa0/0xd0 [ 27.786885] bpf_check+0x2c05/0x4c40 [ 27.787346] ? fixup_bpf_calls+0x1140/0x1140 [ 27.787865] ? kasan_unpoison_shadow+0x30/0x40 [ 27.788406] ? kasan_kmalloc+0xa0/0xd0 [ 27.788865] ? memset+0x1f/0x40 [ 27.789255] ? bpf_obj_name_cpy+0x2d/0x200 [ 27.789750] bpf_prog_load+0xb07/0xeb0 simply running test_verifier with JIT and kasan on.
