BUG: unable to handle kernel NULL pointer dereference at 00000000000008f4 PGD 80000001aa19c067 P4D 80000001aa19c067 PUD 1a00ea067 PMD 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 12273 Comm: syz-executor7 Not tainted 4.19.0-rc1+ #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8801a0a5f888 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff8801a0a5f898 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81355350 R12: 00000000d40000d7 R13: 0000000000000000 R14: 0000000000000282 R15: fffffffffffffff4 FS: 00007f2b686eb700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 syz-executor2: page allocation failure: order:4, mode:0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null) CR2: 00000000000008f4 CR3: 00000001a4580000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmsan_thread_create+0x4b/0x90 mm/kmsan/kmsan_hooks.c:30 syz-executor2 cpuset= __kthread_create_on_node+0x71b/0x810 kernel/kthread.c:345 kthread_create_on_node+0x23f/0x270 kernel/kthread.c:381 syz2 mems_allowed=0 vhost_dev_set_owner+0x1a7/0xce0 drivers/vhost/vhost.c:505 CPU: 0 PID: 12278 Comm: syz-executor2 Not tainted 4.19.0-rc1+ #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 vhost_net_set_owner drivers/vhost/net.c:1476 [inline] vhost_net_ioctl+0xfd2/0x3850 drivers/vhost/net.c:1525 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x14b/0x190 lib/dump_stack.c:113 warn_alloc+0x472/0x690 mm/page_alloc.c:3436 __alloc_pages_slowpath mm/page_alloc.c:4307 [inline] __alloc_pages_nodemask+0x5ae3/0x5c80 mm/page_alloc.c:4400 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xc77/0x2660 fs/ioctl.c:687 __alloc_pages include/linux/gfp.h:475 [inline] __alloc_pages_node include/linux/gfp.h:488 [inline] alloc_pages_node include/linux/gfp.h:502 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:807 [inline] copy_process+0xb05/0xa950 kernel/fork.c:1709 ksys_ioctl fs/ioctl.c:702 [inline] __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:707 _do_fork+0x339/0xfb0 kernel/fork.c:2168 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:707 __do_sys_clone kernel/fork.c:2275 [inline] __se_sys_clone+0xf6/0x110 kernel/fork.c:2269 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 __x64_sys_clone+0x62/0x80 kernel/fork.c:2269 entry_SYSCALL_64_after_hwframe+0x63/0xe7 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 RIP: 0033:0x457099 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RIP: 0033:0x459a29 RSP: 002b:00007f2b686eac78 EFLAGS: 00000246 Code: ff 48 85 f6 0f 84 67 8b fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c 3e 8b fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 ORIG_RAX: 0000000000000010 RSP: 002b:0000000000a3fae8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f2b686eb6d4 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 000000000000af01 RDI: 0000000000000004 RAX: ffffffffffffffda RBX: 00007f6aeacdd700 RCX: 0000000000459a29 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 RDX: 00007f6aeacdd9d0 RSI: 00007f6aeacdcdb0 RDI: 00000000003d0f00 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d1728 R14: 00000000004c6e55 R15: 0000000000000000 RBP: 0000000000a3fd00 R08: 00007f6aeacdd700 R09: 00007f6aeacdd700 Modules linked in: R10: 00007f6aeacdd9d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a3fb9f R14: 00007f6aeacdd9c0 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) CR2: 00000000000008f4 ---[ end trace e829165b64c606f0 ]--- RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8801a0a5f888 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff8801a0a5f898 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81355350 R12: 00000000d40000d7 R13: 0000000000000000 R14: 0000000000000282 R15: fffffffffffffff4 FS: 00007f2b686eb700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000008f4 CR3: 00000001a4580000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400