usercopy: kernel memory exposure attempt detected from 'skbuff_head_cache' (1086 bytes)
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:71!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 18118 Comm: syz-executor.3 Not tainted 4.14.134+ #22
task: 000000005b2f6796 task.stack: 00000000ef19d332
RIP: 0010:report_usercopy mm/usercopy.c:71 [inline]
RIP: 0010:__check_object_size mm/usercopy.c:263 [inline]
RIP: 0010:__check_object_size+0x2fc/0x3b2 mm/usercopy.c:221
RSP: 0018:ffff8881c755fbc0 EFLAGS: 00010286
RAX: 0000000000000057 RBX: ffff888177bffff2 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffc90003943000 RDI: ffffed1038eabf6a
RBP: 000000000000043e R08: 0000000000000057 R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffffa12bca20
R13: 0000000000000001 R14: ffffffffa12bc9e0 R15: ffffea0005deffc0
FS:  00007f1dc2bd6700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c42e889000 CR3: 00000001ad000002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 check_object_size include/linux/thread_info.h:108 [inline]
 check_copy_size include/linux/thread_info.h:139 [inline]
 copy_to_user include/linux/uaccess.h:154 [inline]
 bpf_test_finish.isra.0+0x99/0x160 net/bpf/test_run.c:59
 bpf_prog_test_run_skb+0x528/0x8c0 net/bpf/test_run.c:144
 bpf_prog_test_run kernel/bpf/syscall.c:1346 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1618 [inline]
 SyS_bpf+0xa3b/0x3830 kernel/bpf/syscall.c:1563
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
Code: c7 c2 20 ca 2b a1 4c 0f 45 e2 e8 50 14 db ff 48 8b 04 24 49 89 e8 4c 89 f2 4c 89 e6 48 c7 c7 60 ca 2b a1 48 89 c1 e8 2f 42 cc ff <0f> 0b 4c 89 ff e8 aa d6 fd ff e9 48 fe ff ff 4c 89 ff e8 9d d6 
RIP: report_usercopy mm/usercopy.c:71 [inline] RSP: ffff8881c755fbc0
RIP: __check_object_size mm/usercopy.c:263 [inline] RSP: ffff8881c755fbc0
RIP: __check_object_size+0x2fc/0x3b2 mm/usercopy.c:221 RSP: ffff8881c755fbc0
---[ end trace 22cd3f61b07d490a ]---