kasan: GPF could be caused by NULL-ptr deref or user memory access entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7efdca9 general protection fault: 0000 [#1] PREEMPT SMP KASAN Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 CPU: 1 PID: 11617 Comm: syz-executor3 Not tainted 4.19.0-rc3+ #141 RSP: 002b:00000000f5ef90cc EFLAGS: 00000296 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ORIG_RAX: 0000000000000171 RIP: 0010:usb_find_alt_setting+0x38/0x310 drivers/usb/core/usb.c:231 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000080 Code: 89 fb 48 83 ec 18 48 89 7d c0 89 55 d4 89 75 d0 e8 7d ce 7e fc 48 8d 7b 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 02 00 00 RDX: 000000000000ffeb RSI: 0000000000000000 RDI: 0000000020000d00 RSP: 0018:ffff88019547f608 EFLAGS: 00010247 RBP: 000000000000005a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90003272000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff850001b3 RDI: 0000000000000004 RBP: ffff88019547f648 R08: ffff880198f1c180 R09: ffffed0032a8fedf R10: ffffed0032a8fee1 R11: ffff88019547f70f R12: 0000000000000000 R13: ffff8801ce272900 R14: ffff8801d977a7c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f5f3fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002bc21000 CR3: 00000001bbe3d000 CR4: 00000000001406e0 Call Trace: check_ctrlrecip+0x1e6/0x320 drivers/usb/core/devio.c:828 proc_control+0x151/0xef0 drivers/usb/core/devio.c:1074 usbdev_do_ioctl+0x1eb8/0x3b50 drivers/usb/core/devio.c:2394 usbdev_compat_ioctl+0x24/0x30 drivers/usb/core/devio.c:2562 __do_compat_sys_ioctl fs/compat_ioctl.c:1419 [inline] __se_compat_sys_ioctl fs/compat_ioctl.c:1365 [inline] __ia32_compat_sys_ioctl+0x20e/0x630 fs/compat_ioctl.c:1365 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f43ca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5f3f0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c0185500 RDX: 0000000020000240 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: kobject: 'loop4' (000000006b895ca5): kobject_uevent_env kobject: 'loop4' (000000006b895ca5): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000fa53a6ea): kobject_uevent_env kobject: 'loop2' (00000000fa53a6ea): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000dac85601): kobject_uevent_env kobject: 'loop0' (00000000dac85601): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'tap1' (00000000ce9a712c): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop5' (000000001f69a793): kobject_uevent_env kobject: 'loop5' (000000001f69a793): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (000000006b895ca5): kobject_uevent_env kobject: 'tap1' (00000000ce9a712c): kobject_uevent_env ---[ end trace ea39f53cf4e92a3b ]--- kobject: 'loop4' (000000006b895ca5): fill_kobj_path: path = '/devices/virtual/block/loop4' RIP: 0010:usb_find_alt_setting+0x38/0x310 drivers/usb/core/usb.c:231 CPU: 1 PID: 11630 Comm: syz-executor5 Tainted: G D 4.19.0-rc3+ #141 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 89 fb 48 83 ec 18 48 89 7d c0 89 55 d4 89 75 d0 e8 7d ce 7e fc 48 8d 7b 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 02 00 00 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 RSP: 0018:ffff88019547f608 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90003272000 RDX: 0000000000000000 RSI: ffffffff850001b3 RDI: 0000000000000004 RBP: ffff88019547f648 R08: ffff880198f1c180 R09: ffffed0032a8fedf R10: ffffed0032a8fee1 R11: ffff88019547f70f R12: 0000000000000000 R13: ffff8801ce272900 R14: ffff8801d977a7c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f5f3fb40 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x270/0x740 mm/slab.c:3661 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 CR2: 000000c435301008 CR3: 00000001bbe3d000 CR4: 00000000001406f0 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205