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BUG: KMSAN: uninit-value in copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
BUG: KMSAN: uninit-value in raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
BUG: KMSAN: uninit-value in __copy_from_user_inatomic include/linux/uaccess.h:69 [inline]
BUG: KMSAN: uninit-value in __probe_kernel_read+0x224/0x280 mm/maccess.c:33
CPU: 0 PID: 6786 Comm: syz-executor7 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 __copy_from_user_inatomic include/linux/uaccess.h:69 [inline]
 __probe_kernel_read+0x224/0x280 mm/maccess.c:33
 is_valid_bugaddr+0xb6/0x1a0 arch/x86/kernel/traps.c:168
 report_bug+0x6f/0x880 lib/bug.c:149
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1aa/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:kmsan_copy_to_user+0x141/0x160 mm/kmsan/kmsan.c:1213
RSP: 0018:ffff88014cc7fa60 EFLAGS: 00010202
RAX: ffff88014e191d80 RBX: ffff88014cc7fb18 RCX: 0000000000000004
RDX: 00007ffffffff000 RSI: ffff88014cc7fb18 RDI: c00000001acdf748
RBP: ffff88014cc7faa8 R08: 0000000001080020 R09: ffff88014cc8f910
R10: 0000000000000000 R11: 00000000a9c7a6d2 R12: 0000000000000004
R13: c00000001acdf748 R14: ffff88014e192698 R15: 00000000cda00098
 copy_to_user include/linux/uaccess.h:184 [inline]
 ucma_create_id+0x500/0x980 drivers/infiniband/core/ucma.c:488
 ucma_write+0x576/0x5e0 drivers/infiniband/core/ucma.c:1656
 __vfs_write+0x1a3/0x9f0 fs/read_write.c:480
 vfs_write+0x463/0x8d0 fs/read_write.c:544
 SYSC_write+0x172/0x360 fs/read_write.c:589
 SyS_write+0x55/0x80 fs/read_write.c:581
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
kernel msg: ebtables bug: please report to author: Wrong len argument
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455979
RSP: 002b:00007fda06d06c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fda06d076d4 RCX: 0000000000455979
RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000720 R14: 00000000006feba0 R15: 0000000000000000

Local variable description: ----oldbit.i.i.i.i@set_next_entity
Variable was created at:
 set_next_entity+0x5a/0xb60 kernel/sched/fair.c:4194
 pick_next_task_fair+0x1b09/0x1f70 kernel/sched/fair.c:6724
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