Free swap = 0kB Total swap = 0kB 1965969 pages RAM 0 pages HighMem/MovableOnly 107595 pages reserved BUG: unable to handle kernel NULL pointer dereference at 00000000000008f4 PGD 800000001886c067 P4D 800000001886c067 PUD 2596f067 PMD 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 20336 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27 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:ffff88000ebef1f8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff88000ebef208 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81363150 R12: ffff880020c20900 R13: 0000000000000000 R14: 0000000000000296 R15: fffffffffffffff4 FS: 00007fdfe9753700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000008f4 CR3: 0000000019662000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmsan_thread_create+0x58/0xb0 mm/kmsan/kmsan_hooks.c:30 __kthread_create_on_node+0x6e5/0x7f0 kernel/kthread.c:339 kthread_create_on_node+0x278/0x2c0 kernel/kthread.c:375 init_rescuer+0x2f2/0x6b0 kernel/workqueue.c:4018 __alloc_workqueue_key+0x1e3e/0x23d0 kernel/workqueue.c:4094 ucma_open+0xfe/0x4d0 drivers/infiniband/core/ucma.c:1716 misc_open+0x7ba/0x8b0 drivers/char/misc.c:141 chrdev_open+0xc64/0xde0 fs/char_dev.c:417 do_dentry_open+0xccc/0x1440 fs/open.c:794 vfs_open+0x1b6/0x2f0 fs/open.c:908 do_last fs/namei.c:3399 [inline] path_openat+0x49c0/0x69c0 fs/namei.c:3540 do_filp_open+0x2c1/0x740 fs/namei.c:3574 do_sys_open+0x643/0x990 fs/open.c:1101 __do_sys_openat fs/open.c:1128 [inline] __se_sys_openat fs/open.c:1122 [inline] __x64_sys_openat+0x129/0x170 fs/open.c:1122 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x455ab9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fdfe9752c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fdfe97536d4 RCX: 0000000000455ab9 RDX: 0000000000000002 RSI: 00000000200002c0 RDI: ffffffffffffff9c RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c05af R14: 00000000004d0558 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 00000000000008f4 ---[ end trace 87d656a3ef643420 ]--- 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:ffff88000ebef1f8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff88000ebef208 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81363150 R12: ffff880020c20900 R13: 0000000000000000 R14: 0000000000000296 R15: fffffffffffffff4 FS: 00007fdfe9753700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000008f4 CR3: 0000000019662000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400