usercopy: kernel memory exposure attempt detected from 00000000be1d9136 (kmalloc-1024) (1024 bytes)
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kernel BUG at mm/usercopy.c:72!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 12505 Comm: syz-executor1 Not tainted 4.15.0-rc5+ #176
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x3a2/0x4f0 mm/usercopy.c:264
RSP: 0018:ffff8801d0117858 EFLAGS: 00010286
RAX: 0000000000000063 RBX: ffffffff8592bbe0 RCX: 0000000000000000
RDX: 0000000000000063 RSI: ffffc90002500000 RDI: ffffed003a022eff
RBP: ffff8801d0117948 R08: 1ffff1003a022e8d R09: 0000000000000000
R10: 00000000bf01ee3b R11: 0000000000000000 R12: ffffffff8592bba0
R13: ffff8801d565d710 R14: 0000000000000400 R15: ffffea0007559700
FS: 00007fee238d8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f89f68 CR3: 00000001cff7a002 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_object_size include/linux/thread_info.h:112 [inline]
check_copy_size include/linux/thread_info.h:143 [inline]
copy_to_user include/linux/uaccess.h:154 [inline]
old_dev_ioctl.isra.1+0x105b/0x1fa0 net/bridge/br_ioctl.c:178
br_dev_ioctl+0x44/0xc0 net/bridge/br_ioctl.c:392
dev_ifsioc+0x333/0x9b0 net/core/dev_ioctl.c:354
dev_ioctl+0xa73/0xfb0 net/core/dev_ioctl.c:589
sock_ioctl+0x1da/0x440 net/socket.c:990
vfs_ioctl fs/ioctl.c:46 [inline]
do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007fee238d7c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000020971000 RSI: 00000000000089f0 RDI: 0000000000000013
RBP: 0000000000000567 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6248
R13: 00000000ffffffff R14: 00007fee238d86d4 R15: 0000000000000000
Code: 48 0f 44 da e8 70 5b c0 ff 48 8b 85 28 ff ff ff 4d 89 f1 4c 89 e9 4c 89 e2 48 89 de 48 c7 c7 20 bc 92 85 49 89 c0 e8 e6 10 aa ff <0f> 0b 48 c7 c0 e0 b9 92 85 eb 96 48 c7 c0 20 ba 92 85 eb 8d 48
RIP: report_usercopy mm/usercopy.c:64 [inline] RSP: ffff8801d0117858
RIP: __check_object_size+0x3a2/0x4f0 mm/usercopy.c:264 RSP: ffff8801d0117858
---[ end trace c31af8d2bf176e1e ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..