sshd (5984) used greatest stack depth: 15632 bytes left BUG: GPF in non-whitelisted uaccess (non-canonical address?) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6001 Comm: syz-executor819 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff8801bfdd7398 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000109 RCX: 0000000000000109 RDX: 0000000000000109 RSI: 241037f828e5769d RDI: ffff8801ccaf06b8 RBP: ffff8801bfdd73d0 R08: ffffed003995e0f9 R09: ffffed003995e0f9 R10: ffffed003995e0f8 R11: ffff8801ccaf07c0 R12: 241037f828e577a6 R13: 241037f828e5769d R14: ffff8801ccaf06b8 R15: ffffffffffffffff FS: 0000000001054880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020d83ff8 CR3: 00000001c162a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_from_user include/linux/uaccess.h:147 [inline] uhid_dev_create+0x20c/0xb40 drivers/hid/uhid.c:542 uhid_char_write+0xc74/0xef0 drivers/hid/uhid.c:725 __vfs_write+0x119/0x9f0 fs/read_write.c:485 __kernel_write+0x10c/0x370 fs/read_write.c:506 write_pipe_buf+0x180/0x240 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x38b/0x7c0 fs/splice.c:627 splice_from_pipe+0x1ec/0x340 fs/splice.c:662 default_file_splice_write+0x3c/0x90 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x128/0x190 fs/splice.c:1018 splice_direct_to_actor+0x318/0x8f0 fs/splice.c:973 do_splice_direct+0x2d4/0x420 fs/splice.c:1061 do_sendfile+0x62a/0xe20 fs/read_write.c:1439 __do_sys_sendfile64 fs/read_write.c:1494 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1486 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440309 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc051894f8 EFLAGS: 00000203 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 RDX: 0000000020d83ff8 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00008000fffffffe R11: 0000000000000203 R12: 0000000000401b90 R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 6639440217ff234f ]--- RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff8801bfdd7398 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000109 RCX: 0000000000000109 RDX: 0000000000000109 RSI: 241037f828e5769d RDI: ffff8801ccaf06b8 RBP: ffff8801bfdd73d0 R08: ffffed003995e0f9 R09: ffffed003995e0f9 R10: ffffed003995e0f8 R11: ffff8801ccaf07c0 R12: 241037f828e577a6 R13: 241037f828e5769d R14: ffff8801ccaf06b8 R15: ffffffffffffffff FS: 0000000001054880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020d83ff8 CR3: 00000001c162a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400