1965969 pages RAM [ 28567] 0 28567 17617 8744 126976 0 0 syz-executor5 0 pages HighMem/MovableOnly 102442 pages reserved [ 28585] 0 28585 17617 8744 126976 0 0 syz-executor5 BUG: unable to handle kernel NULL pointer dereference at 00000000000008f4 [ 28615] 0 28615 17716 8750 126976 0 0 syz-executor5 PGD 80000001a0aae067 P4D 80000001a0aae067 PUD 1a0aac067 PMD 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 31140 Comm: kworker/1:23 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 [ 28661] 0 28661 17716 8750 126976 0 0 syz-executor5 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: 0000:ffff8801ae2efa18 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff8801ae2efa28 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81355350 R12: 000000008ee00007 R13: 0000000000000000 R14: 0000000000000282 R15: fffffffffffffff4 [ 28708] 0 28708 17617 8744 126976 0 0 syz-executor5 FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000b0 CR3: 00000001bee12000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: kmsan_thread_create+0x4b/0x90 mm/kmsan/kmsan_hooks.c:30 [ 28712] 0 28712 17617 8744 126976 0 0 syz-executor5 __kthread_create_on_node+0x71b/0x810 kernel/kthread.c:345 kthread_create_on_node+0x23f/0x270 kernel/kthread.c:381 [ 28735] 0 28735 17617 8744 126976 0 0 syz-executor5 create_worker+0x4ee/0xfb0 kernel/workqueue.c:1813 maybe_create_worker kernel/workqueue.c:1972 [inline] manage_workers kernel/workqueue.c:2024 [inline] worker_thread+0x8d9/0x2590 kernel/workqueue.c:2268 [ 28742] 0 28742 17617 8744 126976 0 0 syz-executor5 kthread+0x465/0x4a0 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:416 [ 28764] 0 28764 17650 8746 126976 0 0 syz-executor5 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 00000000000008f4 ---[ end trace 7ec782c91dbb9033 ]--- 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 [ 28768] 0 28768 17650 8746 126976 0 0 syz-executor5 RSP: 0000:ffff8801ae2efa18 EFLAGS: 00010046 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000fb0 RDX: 0000000000000fb0 RSI: 0000000000000000 RDI: 00000000000008f4 RBP: ffff8801ae2efa28 R08: 0000000000000000 R09: 00000000000008f4 R10: 0000000000000000 R11: ffffffff81355350 R12: 000000008ee00007 R13: 0000000000000000 R14: 0000000000000282 R15: fffffffffffffff4 FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28785] 0 28785 17617 8744 126976 0 0 syz-executor5 CR2: 00000000000000b0 CR3: 00000001bee12000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600