Free swap = 0kB Total swap = 0kB 1965969 pages RAM 0 pages HighMem/MovableOnly 102442 pages reserved BUG: unable to handle kernel NULL pointer dereference at 00000000000008f4 PGD 800000000e489067 P4D 800000000e489067 PUD e4b2067 PMD 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 15440 Comm: syz-executor6 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:ffff88001adcf268 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff88001adcf278 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff818a7e40 R12: 000000009b4000d9 R13: 0000000000000000 R14: 0000000000000286 R15: fffffffffffffff4 FS: 00007fe630115700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000008f4 CR3: 000000000faf6000 CR4: 00000000001406e0 Call Trace: kmsan_thread_create+0x4b/0x90 mm/kmsan/kmsan_hooks.c:30 __kthread_create_on_node+0x71b/0x810 kernel/kthread.c:345 kthread_create_on_node+0x23f/0x270 kernel/kthread.c:381 init_rescuer+0x334/0x6f0 kernel/workqueue.c:4033 __alloc_workqueue_key+0x1d90/0x2300 kernel/workqueue.c:4109 ucma_open+0x122/0x4f0 drivers/infiniband/core/ucma.c:1716 misc_open+0x6e2/0x8b0 drivers/char/misc.c:141 chrdev_open+0xc26/0xdb0 fs/char_dev.c:417 do_dentry_open+0xce6/0x1740 fs/open.c:771 vfs_open+0xaf/0xe0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x1799/0x6870 fs/namei.c:3534 do_filp_open+0x259/0x610 fs/namei.c:3564 kworker/u4:6: page allocation failure: order:4, mode:0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null) do_sys_open+0x630/0x940 fs/open.c:1063 kworker/u4:6 cpuset= __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat+0xcb/0xe0 fs/open.c:1084 __x64_sys_openat+0x56/0x70 fs/open.c:1084 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457099 / 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 mems_allowed=0 RSP: 002b:00007fe630114c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe6301156d4 RCX: 0000000000457099 RDX: 0000000000000002 RSI: 0000000020000380 RDI: ffffffffffffff9c RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff CPU: 0 PID: 9818 Comm: kworker/u4:6 Not tainted 4.19.0-rc1+ #41 R13: 00000000004d3948 R14: 00000000004c8588 R15: 0000000000000000 Modules linked in: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Dumping ftrace buffer: Workqueue: events_unbound call_usermodehelper_exec_work (ftrace buffer empty) CR2: 00000000000008f4 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 __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 ---[ end trace 8643a8036e4f68b4 ]--- 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:ffff88001adcf268 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 _do_fork+0x339/0xfb0 kernel/fork.c:2168 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff88001adcf278 R08: 0000000000000000 R09: 00000000000008f4 kernel_thread+0xc6/0xe0 kernel/fork.c:2227 R10: 0000000000000000 R11: ffffffff818a7e40 R12: 000000009b4000d9 R13: 0000000000000000 R14: 0000000000000286 R15: fffffffffffffff4 FS: 00007fe630115700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 call_usermodehelper_exec_sync kernel/umh.c:130 [inline] call_usermodehelper_exec_work+0x142/0x500 kernel/umh.c:182 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000008f4 CR3: 000000000faf6000 CR4: 00000000001406e0