Re: [PATCH bpf-next] bpf: test_run: fix OOB access in bpf_prog_test_run_xdp

[patchwork-bot+netdevbpf@kernel.org]

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@kernel.org>:

On Wed,  2 Feb 2022 21:53:20 +0100 you wrote:
> Fix the following kasan issue reported by syzbot:
> 
> BUG: KASAN: slab-out-of-bounds in __skb_frag_set_page include/linux/skbuff.h:3242 [inline]
> BUG: KASAN: slab-out-of-bounds in bpf_prog_test_run_xdp+0x10ac/0x1150 net/bpf/test_run.c:972
> Write of size 8 at addr ffff888048c75000 by task syz-executor.5/23405
> 
> CPU: 1 PID: 23405 Comm: syz-executor.5 Not tainted 5.16.0-syzkaller #0
> Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Call Trace:
>  <TASK>
>  __dump_stack lib/dump_stack.c:88 [inline]
>  dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
>  print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
>  __kasan_report mm/kasan/report.c:442 [inline]
>  kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
>  __skb_frag_set_page include/linux/skbuff.h:3242 [inline]
>  bpf_prog_test_run_xdp+0x10ac/0x1150 net/bpf/test_run.c:972
>  bpf_prog_test_run kernel/bpf/syscall.c:3356 [inline]
>  __sys_bpf+0x1858/0x59a0 kernel/bpf/syscall.c:4658
>  __do_sys_bpf kernel/bpf/syscall.c:4744 [inline]
>  __se_sys_bpf kernel/bpf/syscall.c:4742 [inline]
>  __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4742
>  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>  do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>  entry_SYSCALL_64_after_hwframe+0x44/0xae
> RIP: 0033:0x7f4ea30dd059
> RSP: 002b:00007f4ea1a52168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
> RAX: ffffffffffffffda RBX: 00007f4ea31eff60 RCX: 00007f4ea30dd059
> RDX: 0000000000000048 RSI: 0000000020000000 RDI: 000000000000000a
> RBP: 00007f4ea313708d R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007ffc8367c5af R14: 00007f4ea1a52300 R15: 0000000000022000
>  </TASK>
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: test_run: fix OOB access in bpf_prog_test_run_xdp
    https://git.kernel.org/bpf/bpf-next/c/a6763080856f

You are awesome, thank you!
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