kasan: CONFIG_KASAN_INLINE enabled
kasan: CONFIG_KASAN_INLINE enabled
kobject: 'kvm' (000000002f4b6241): kobject_uevent_env
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9774 Comm: syz-executor2 Not tainted 4.19.0-rc4-next-20180921+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop4' (00000000e1bb68c3): kobject_uevent_env
RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2486 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2492 [inline]
RIP: 0010:finish_task_switch+0x3a4/0x900 kernel/sched/core.c:2684
Code: 3d 04 00 00 4d 8b bc 24 50 03 00 00 4d 85 ff 0f 84 ab fe ff ff 49 bc 00 00 00 00 00 fc ff df 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 21 00 0f 85 da 03 00 00 49 8b 4f 10 48 89 ce 48 c1 ee 03
RSP: 0018:ffff8801934af0b0 EFLAGS: 00010a06
kasan: GPF could be caused by NULL-ptr deref or user memory access
RAX: 0000000000000000 RBX: ffff8801dad2cc40 RCX: 1bd5a00000000022
RDX: 00000000000013c5 RSI: ffffffff810f018e RDI: dead000000000110
RBP: ffff8801934af198 R08: ffff880193a6e000 R09: fffff520003c2e46
R10: fffff520003c2e46 R11: ffffc90001e17237 R12: dffffc0000000000
R13: ffff8801b86ec4c0 R14: 0000000000000000 R15: dead000000000100
FS:  00007ff93bbcb700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fe8010 CR3: 00000001bca5f000 CR4: 00000000001426e0
kobject: 'loop4' (00000000e1bb68c3): fill_kobj_path: path = '/devices/virtual/block/loop4'
Call Trace:
 context_switch kernel/sched/core.c:2833 [inline]
 __schedule+0x874/0x1ed0 kernel/sched/core.c:3479
 schedule+0xfe/0x460 kernel/sched/core.c:3523
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x3f9/0x840 kernel/futex.c:2530
 futex_wait+0x45c/0xa50 kernel/futex.c:2645
 do_futex+0x31a/0x26d0 kernel/futex.c:3528
 __do_sys_futex kernel/futex.c:3589 [inline]
 __se_sys_futex kernel/futex.c:3557 [inline]
 __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3557
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff93bbcacf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000072bfa8 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072bfa8
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bfac
R13: 00007ffe9f61e4df R14: 00007ff93bbcb9c0 R15: 0000000000000001
Modules linked in:
general protection fault: 0000 [#2] PREEMPT SMP KASAN
---[ end trace 442a595023caba24 ]---
CPU: 0 PID: 9760 Comm: syz-executor1 Tainted: G      D           4.19.0-rc4-next-20180921+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:p9_client_prepare_req.part.6+0x47c/0x940 net/9p/client.c:712
Code: ff 0f 87 fc fc ff ff e8 92 32 eb f9 0f be 85 a4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 a4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 2b
RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2486 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2492 [inline]
RIP: 0010:finish_task_switch+0x3a4/0x900 kernel/sched/core.c:2684
RSP: 0018:ffff880193d571e0 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90003a5c000
RDX: 000000000000000b RSI: ffffffff87921e9e RDI: 0000000000000282
RBP: ffff880193d57358 R08: ffff8801b8f6e500 R09: ffffed003b585b57
R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffff8801cb5c9080
Code: 3d 04 00 00 4d 8b bc 24 50 03 00 00 4d 85 ff 0f 84 ab fe ff ff 49 bc 00 00 00 00 00 fc ff df 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 21 00 0f 85 da 03 00 00 49 8b 4f 10 48 89 ce 48 c1 ee 03
R13: 0000000000002000 R14: 000000000000005e R15: 0000000000002000
FS:  00007f83e4a0c700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000930004 CR3: 00000001c7df7000 CR4: 00000000001426f0
RSP: 0018:ffff8801934af0b0 EFLAGS: 00010a06
Call Trace:
RAX: 0000000000000000 RBX: ffff8801dad2cc40 RCX: 1bd5a00000000022
RDX: 00000000000013c5 RSI: ffffffff810f018e RDI: dead000000000110
 p9_client_prepare_req net/9p/client.c:744 [inline]
 p9_client_rpc+0x231/0x1320 net/9p/client.c:744
RBP: ffff8801934af198 R08: ffff880193a6e000 R09: fffff520003c2e46
R10: fffff520003c2e46 R11: ffffc90001e17237 R12: dffffc0000000000
R13: ffff8801b86ec4c0 R14: 0000000000000000 R15: dead000000000100
FS:  00007ff93bbcb700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fe8010 CR3: 00000001bca5f000 CR4: 00000000001426e0