usercopy: kernel memory exposure attempt detected from 'kmalloc-4096' (1893 bytes)
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kernel BUG at mm/usercopy.c:71!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 5540 Comm: syz-executor.4 Not tainted 4.14.140+ #39
task: 0000000062353149 task.stack: 0000000037d63de2
RIP: 0010:report_usercopy mm/usercopy.c:71 [inline]
RIP: 0010:__check_object_size mm/usercopy.c:263 [inline]
RIP: 0010:__check_object_size.cold+0x58/0x84 mm/usercopy.c:221
RSP: 0018:ffff888197c77bc0 EFLAGS: 00010286
RAX: 0000000000000052 RBX: ffff8881ca4543fd RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffc90003d35000 RDI: ffffed1032f8ef6a
RBP: 0000000000000765 R08: 0000000000000052 R09: ffffed103aee4ce9
R10: ffffed103aee4ce8 R11: ffff8881d7726747 R12: ffffffff924bd260
R13: 0000000000000001 R14: ffffffff924bd220 R15: ffffea0007291400
FS:  00007f7699dd1700(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020037000 CR3: 00000001cc7fe003 CR4: 00000000001606a0
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: 0033:0x459879
RSP: 002b:00007f7699dd0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000000000028 RSI: 0000000020000580 RDI: 000000000000000a
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7699dd16d4
R13: 00000000004bfbf2 R14: 00000000004d18b8 R15: 00000000ffffffff
Code: c7 c2 60 d2 4b 92 4c 0f 45 e2 e8 c8 12 db ff 48 8b 04 24 49 89 e8 4c 89 f2 4c 89 e6 48 c7 c7 a0 d2 4b 92 48 89 c1 e8 c7 37 cc ff <0f> 0b 48 c7 c0 e0 d0 4b 92 eb a4 48 c7 c0 a0 d0 4b 92 eb 9b 48 
RIP: report_usercopy mm/usercopy.c:71 [inline] RSP: ffff888197c77bc0
RIP: __check_object_size mm/usercopy.c:263 [inline] RSP: ffff888197c77bc0
RIP: __check_object_size.cold+0x58/0x84 mm/usercopy.c:221 RSP: ffff888197c77bc0
---[ end trace f7ff5414432c390b ]---