usercopy: kernel memory exposure attempt detected from 'kmalloc-4096' (1957 bytes)
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:71!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 18879 Comm: syz-executor.2 Not tainted 4.14.139+ #34
task: 00000000f060e5c7 task.stack: 000000002b975a6a
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:ffff8881a170fbc0 EFLAGS: 00010286
RAX: 0000000000000052 RBX: ffff8881a4dad4fd RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffc90003559000 RDI: ffffed10342e1f6a
RBP: 00000000000007a5 R08: 0000000000000052 R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffff93abd260
R13: 0000000000000001 R14: ffffffff93abd220 R15: ffffea0006936a00
FS:  00007f7524ef5700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fdf208330 CR3: 00000001cc4bc002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007f7524ef4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000019 RSI: 00000000200002c0 RDI: 000000000000000a
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7524ef56d4
R13: 00000000004bfb92 R14: 00000000004d1818 R15: 00000000ffffffff
Code: c7 c2 60 d2 ab 93 4c 0f 45 e2 e8 b0 13 db ff 48 8b 04 24 49 89 e8 4c 89 f2 4c 89 e6 48 c7 c7 a0 d2 ab 93 48 89 c1 e8 af 38 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: ffff8881a170fbc0
RIP: __check_object_size mm/usercopy.c:263 [inline] RSP: ffff8881a170fbc0
RIP: __check_object_size+0x2fc/0x3b2 mm/usercopy.c:221 RSP: ffff8881a170fbc0
---[ end trace 77829840a65951d1 ]---