kasan: GPF could be caused by NULL-ptr deref or user memory access Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.0.0-rc5 #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events hci_uart_write_work RIP: 0010:hci_uart_write_work+0x1b6/0x710 drivers/bluetooth/hci_ldisc.c:180 __should_failslab+0x121/0x190 mm/failslab.c:32 Code: 0f 85 6a 04 00 00 49 8b b4 24 c8 00 00 00 4c 89 ef e8 ce 9c 53 02 89 c6 48 8b 45 d0 48 8d b8 5c 10 00 00 48 89 f8 48 c1 e8 03 <0f> b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1d should_failslab+0x9/0x14 mm/slab_common.c:1603 RSP: 0018:ffff8880a99cfcb0 EFLAGS: 00010203 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3288 [inline] kmem_cache_alloc_node+0x56/0x710 mm/slab.c:3631 RAX: 000000000000020b RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000105c RBP: ffff8880a99cfd30 R08: ffff8880a99bc5c0 R09: ffff8880a99bce88 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a3f54a40 __alloc_skb+0xd5/0x5e0 net/core/skbuff.c:196 R13: ffff8880566be600 R14: ffff88808f72fb28 R15: ffff8880a3f54ab0 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 alloc_skb include/linux/skbuff.h:1011 [inline] h5_link_control.isra.0+0x2f/0xa0 drivers/bluetooth/hci_h5.c:130 CR2: 00007fe4b89be000 CR3: 00000000877b9000 CR4: 00000000001406e0 h5_open+0x438/0x5f0 drivers/bluetooth/hci_h5.c:246 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:686 [inline] hci_uart_tty_ioctl+0x2d4/0xa70 drivers/bluetooth/hci_ldisc.c:748 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 tty_ioctl+0xac9/0x14d0 drivers/tty/tty_io.c:2662 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: Bluetooth: Can't allocate HCI device vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ---[ end trace 4d5775ceacb3be51 ]--- RIP: 0010:hci_uart_write_work+0x1b6/0x710 drivers/bluetooth/hci_ldisc.c:180 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 Code: 0f 85 6a 04 00 00 49 8b b4 24 c8 00 00 00 4c 89 ef e8 ce 9c 53 02 89 c6 48 8b 45 d0 48 8d b8 5c 10 00 00 48 89 f8 48 c1 e8 03 <0f> b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1d do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 RSP: 0018:ffff8880a99cfcb0 EFLAGS: 00010203 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7b7d22cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7b7d22cc90 RCX: 0000000000457e39 RDX: 0000000000000002 RSI: 00000000400455c8 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 RAX: 000000000000020b RBX: dffffc0000000000 RCX: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b7d22d6d4 R13: 00000000004c06e7 R14: 00000000004d22d0 R15: 0000000000000005 kobject: 'loop3' (000000004a725389): kobject_uevent_env RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000105c RBP: ffff8880a99cfd30 R08: ffff8880a99bc5c0 R09: ffff8880a99bce88 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a3f54a40 kobject: 'loop3' (000000004a725389): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: '(null)' (00000000a8df0876): kobject_cleanup, parent (null) x86/PAT: syz-executor5:18937 map pfn RAM range req write-combining for [mem 0x604df000-0x604dffff], got write-back kobject: '(null)' (00000000d87d6afa): kobject_cleanup, parent (null) kobject: '(null)' (00000000a8df0876): calling ktype release R13: ffff8880566be600 R14: ffff88808f72fb28 R15: ffff8880a3f54ab0 kobject: '(null)' (00000000d87d6afa): calling ktype release FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf9352d68 CR3: 000000005551d000 CR4: 00000000001406e0 kobject: 'loop1' (0000000091c3f94a): kobject_uevent_env netlink: 'syz-executor2': attribute type 1 has an invalid length. DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop1' (0000000091c3f94a): fill_kobj_path: path = '/devices/virtual/block/loop1' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400