usercopy: kernel memory exposure attempt detected from ffff88019e8bfff2 (names_cache) (57692 bytes)
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kernel BUG at mm/usercopy.c:72!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 13523 Comm: syz-executor4 Not tainted 4.14.81+ #6
task: ffff8801d16b0000 task.stack: ffff8801cfe58000
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x311/0x3a2 mm/usercopy.c:264
RSP: 0018:ffff8801cfe5fb58 EFLAGS: 00010282
RAX: 0000000000000063 RBX: 000000000000e15c RCX: 0000000000013df6
RDX: 0000000000000000 RSI: ffffc90004772000 RDI: ffffffffaf1d2420
RBP: ffff88019e8bfff2 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffad6c0060
R13: 0000000000000001 R14: ffffffffad6c0020 R15: ffffea00067a2e00
FS:  00007fca76ed5700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000dee5e0 CR3: 00000001c5974002 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+0xba/0x190 net/bpf/test_run.c:59
 bpf_prog_test_run_skb+0x4d0/0x8c0 net/bpf/test_run.c:144
 bpf_prog_test_run kernel/bpf/syscall.c:1343 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1615 [inline]
 SyS_bpf+0x79d/0x3700 kernel/bpf/syscall.c:1560
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007fca76ed4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000028 RSI: 00000000200001c0 RDI: 000000000000000a
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fca76ed56d4
R13: 00000000004bd952 R14: 00000000004ccbf0 R15: 00000000ffffffff
Code: 00 6c ad 4c 0f 45 e2 e8 ae d3 db ff 48 8b 04 24 49 89 d9 48 89 e9 4c 89 f2 4c 89 e6 48 c7 c7 a0 00 6c ad 49 89 c0 e8 9a 15 cd ff <0f> 0b 4c 89 ff e8 35 cf fd ff e9 09 fe ff ff 4c 89 ff e8 28 cf 
RIP: report_usercopy mm/usercopy.c:64 [inline] RSP: ffff8801cfe5fb58
RIP: __check_object_size+0x311/0x3a2 mm/usercopy.c:264 RSP: ffff8801cfe5fb58
---[ end trace 23257425f92aa5a8 ]---