bisecting fixing commit since b94de4d19498b454645b72d08a05d32fa9074fb5
building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f
testing commit b94de4d19498b454645b72d08a05d32fa9074fb5 with gcc (GCC) 8.4.1 20210217
kernel signature: c9222364755536a9764ab9cd088ea4df45d63aaf00c98cd2229be95890012a24
all runs: crashed: KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
testing current HEAD 9f84340f012ee60c12aacc03662bcdd67419a31a
testing commit 9f84340f012ee60c12aacc03662bcdd67419a31a with gcc (GCC) 8.4.1 20210217
kernel signature: 6d1f0baacc1637d5d9d3086c729b0351e71ca4423103e157bebbb1ebd83dc5d5
all runs: crashed: KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
revisions tested: 2, total time: 24m18.764765219s (build: 16m43.410648329s, test: 7m11.146027599s)
the crash still happens on HEAD
commit msg: Linux 4.19.196
crash: KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
==================================================================
BUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x1f2/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:178
Read of size 8 at addr ffff8881d884d800 by task syz-executor.5/9164
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705

 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0bd08ff188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f0bd08ff1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe94536b5f R14: 00007f0bd08ff300 R15: 0000000000022000
CPU: 0 PID: 9164 Comm: syz-executor.5 Not tainted 4.19.196-syzkaller #0
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+0x17c/0x226 lib/dump_stack.c:118
Bluetooth: hci5: command 0x0419 tx timeout
 print_address_description.cold.6+0x9/0x211 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:396
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 kvm_vm_ioctl_unregister_coalesced_mmio+0x1f2/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:178
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
Bluetooth: hci3: command 0x0419 tx timeout
Bluetooth: hci0: command 0x0419 tx timeout
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b84458188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f2b844581d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcc285230f R14: 00007f2b84458300 R15: 0000000000022000

Allocated by task 9164:
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:553
 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:538
CPU: 1 PID: 9192 Comm: syz-executor.3 Not tainted 4.19.196-syzkaller #0
 kmem_cache_alloc_trace+0x152/0x3a0 mm/slab.c:3625
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 kvm_vm_ioctl_register_coalesced_mmio+0x4f/0x320 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:146
Call Trace:
 kvm_vm_ioctl+0xa0e/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3242
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x17c/0x226 lib/dump_stack.c:118
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.2+0x5/0xa lib/fault-inject.c:149
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 __should_failslab+0xba/0xf0 mm/failslab.c:32
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
 should_failslab+0x9/0x20 mm/slab_common.c:1588

 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x2b5/0x3d0 mm/slab.c:3736
Freed by task 9164:
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x13c/0x220 mm/kasan/kasan.c:521
 kmalloc include/linux/slab.h:520 [inline]
 kvm_io_bus_unregister_dev+0x116/0x2f0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3862
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 kvm_vm_ioctl_unregister_coalesced_mmio+0x15b/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:180
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcf/0x220 mm/slab.c:3822
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 coalesced_mmio_destructor+0x100/0x150 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:101
 kvm_iodevice_destructor include/kvm/iodev.h:73 [inline]
 kvm_io_bus_unregister_dev.cold.38+0xbd/0x10e arch/x86/kvm/../../../virt/kvm/kvm_main.c:3874
 kvm_vm_ioctl_unregister_coalesced_mmio+0x15b/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:180
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881d884d800
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff8881d884d800, ffff8881d884d840)
The buggy address belongs to the page:
page:ffffea0007621340 count:1 mapcount:0 mapping:ffff8881f6000340 index:0x0
flags: 0x17ff00000000100(slab)
raw: 017ff00000000100 ffffea0007a315c8 ffffea0007d18748 ffff8881f6000340
raw: 0000000000000000 ffff8881d884d000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688

Memory state around the buggy address:
 ffff8881d884d700: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff8881d884d780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff8881d884d800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff8881d884d880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881d884d900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
==================================================================
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
list_del corruption, ffff8881d884d800->prev is LIST_POISON2 (dead000000000200)
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
------------[ cut here ]------------
RSP: 002b:00007f5bae247188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
kernel BUG at lib/list_debug.c:50!
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
CPU: 0 PID: 9164 Comm: syz-executor.5 Tainted: G    B             4.19.196-syzkaller #0
RBP: 00007f5bae2471d0 R08: 0000000000000000 R09: 0000000000000000
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x4a lib/list_debug.c:48
R13: 00007ffd2a594eff R14: 00007f5bae247300 R15: 0000000000022000
Code: f7 ff 0f 0b 48 89 f1 48 c7 c7 c0 1f 50 88 48 89 de e8 ac fa f7 ff 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 21 50 88 e8 98 fa f7 ff <0f> 0b 4c 89 ea 48 89 de 48 c7 c7 a0 20 50 88 e8 84 fa f7 ff 0f 0b
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
RSP: 0018:ffff8881d381f958 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff8881d884d800 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88501e00 RDI: ffffffff8bad7720
RBP: ffff8881d381f970 R08: ffffed103ec84e99 R09: ffffed103ec84e98
R10: ffffed103ec84e98 R11: ffff8881f64274c7 R12: dead000000000200
R13: ffff8881d884d880 R14: ffff8881d884d880 R15: dffffc0000000000
FS:  00007f2b84458700(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffad380ea21 CR3: 00000001eda4e002 CR4: 00000000001626f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
ieee80211 phy11: Selected rate control algorithm 'minstrel_ht'
Call Trace:
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 coalesced_mmio_destructor+0x1a/0x150 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:99
 kvm_iodevice_destructor include/kvm/iodev.h:73 [inline]
 kvm_vm_ioctl_unregister_coalesced_mmio+0x199/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:181
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
kvm: failed to shrink bus, removing it completely
list_del corruption, ffff8881ec3b6e80->prev is LIST_POISON2 (dead000000000200)
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:50!
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b84458188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f2b844581d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcc285230f R14: 00007f2b84458300 R15: 0000000000022000
Modules linked in:
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
CPU: 1 PID: 9175 Comm: syz-executor.1 Tainted: G    B D           4.19.196-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x4a lib/list_debug.c:48
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
Code: f7 ff 0f 0b 48 89 f1 48 c7 c7 c0 1f 50 88 48 89 de e8 ac fa f7 ff 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 21 50 88 e8 98 fa f7 ff <0f> 0b 4c 89 ea 48 89 de 48 c7 c7 a0 20 50 88 e8 84 fa f7 ff 0f 0b
RSP: 0018:ffff8881f2a77958 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff8881ec3b6e80 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff88501e00 RDI: ffffffff8bad7720
RBP: ffff8881f2a77970 R08: ffffed103eca4e99 R09: ffffed103eca4e98
R10: ffffed103eca4e98 R11: ffff8881f65274c7 R12: dead000000000200
R13: ffff8881ec3b6f00 R14: ffff8881ec3b6f00 R15: dffffc0000000000
FS:  00007f0bd08ff700(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5cbeed6000 CR3: 00000001ec6e4001 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 coalesced_mmio_destructor+0x1a/0x150 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:99
 kvm_iodevice_destructor include/kvm/iodev.h:73 [inline]
 kvm_vm_ioctl_unregister_coalesced_mmio+0x199/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:181
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0bd08ff188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f0bd08ff1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe94536b5f R14: 00007f0bd08ff300 R15: 0000000000022000
Modules linked in:
kvm: failed to shrink bus, removing it completely
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
list_del corruption, ffff8881deb00480->prev is LIST_POISON2 (dead000000000200)
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
------------[ cut here ]------------
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
kernel BUG at lib/list_debug.c:50!
invalid opcode: 0000 [#3] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
CPU: 1 PID: 9192 Comm: syz-executor.3 Tainted: G    B D           4.19.196-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x4a lib/list_debug.c:48
Code: f7 ff 0f 0b 48 89 f1 48 c7 c7 c0 1f 50 88 48 89 de e8 ac fa f7 ff 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 21 50 88 e8 98 fa f7 ff <0f> 0b 4c 89 ea 48 89 de 48 c7 c7 a0 20 50 88 e8 84 fa f7 ff 0f 0b
ieee80211 phy12: Selected rate control algorithm 'minstrel_ht'
RSP: 0018:ffff8881f4087958 EFLAGS: 00010282
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
RAX: 000000000000004e RBX: ffff8881deb00480 RCX: 0000000000000000
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
RDX: 0000000000000000 RSI: ffffffff88501e00 RDI: ffffffff8bad7720
ieee80211 phy13: Selected rate control algorithm 'minstrel_ht'
RBP: ffff8881f4087970 R08: ffffed103eca4e99 R09: ffffed103eca4e98
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
R10: ffffed103eca4e98 R11: ffff8881f65274c7 R12: dead000000000200
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
R13: ffff8881deb00500 R14: ffff8881deb00500 R15: dffffc0000000000
FS:  00007f5bae247700(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6a062e2c CR3: 00000001ec9a1003 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 coalesced_mmio_destructor+0x1a/0x150 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:99
 kvm_iodevice_destructor include/kvm/iodev.h:73 [inline]
 kvm_vm_ioctl_unregister_coalesced_mmio+0x199/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:181
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5bae247188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
ieee80211 phy14: Selected rate control algorithm 'minstrel_ht'
RBP: 00007f5bae2471d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd2a594eff R14: 00007f5bae247300 R15: 0000000000022000
Modules linked in:
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
ieee80211 phy15: Selected rate control algorithm 'minstrel_ht'
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
CPU: 1 PID: 9271 Comm: syz-executor.2 Tainted: G    B D           4.19.196-syzkaller #0
---[ end trace 2c415595c07682f3 ]---
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+0x17c/0x226 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.2+0x5/0xa lib/fault-inject.c:149
 __should_failslab+0xba/0xf0 mm/failslab.c:32
 should_failslab+0x9/0x20 mm/slab_common.c:1588
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x2b5/0x3d0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 kvm_io_bus_unregister_dev+0x116/0x2f0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3862
 kvm_vm_ioctl_unregister_coalesced_mmio+0x15b/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:180
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x4a lib/list_debug.c:48
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91643ef188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f91643ef1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe3554e2df R14: 00007f91643ef300 R15: 0000000000022000
CPU: 1 PID: 9272 Comm: syz-executor.4 Tainted: G    B D           4.19.196-syzkaller #0
Code: f7 ff 0f 0b 48 89 f1 48 c7 c7 c0 1f 50 88 48 89 de e8 ac fa f7 ff 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 21 50 88 e8 98 fa f7 ff <0f> 0b 4c 89 ea 48 89 de 48 c7 c7 a0 20 50 88 e8 84 fa f7 ff 0f 0b
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+0x17c/0x226 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.2+0x5/0xa lib/fault-inject.c:149
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
 __should_failslab+0xba/0xf0 mm/failslab.c:32
 should_failslab+0x9/0x20 mm/slab_common.c:1588
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x2b5/0x3d0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 kvm_io_bus_unregister_dev+0x116/0x2f0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3862
 kvm_vm_ioctl_unregister_coalesced_mmio+0x15b/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:180
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd75913188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007efd759131d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
R13: 00007ffdc1746eef R14: 00007efd75913300 R15: 0000000000022000
RSP: 0018:ffff8881d381f958 EFLAGS: 00010282
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
kvm: failed to shrink bus, removing it completely
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
list_del corruption, ffff8881f3e71c80->prev is LIST_POISON2 (dead000000000200)
RAX: 000000000000004e RBX: ffff8881d884d800 RCX: 0000000000000000
------------[ cut here ]------------
RDX: 0000000000000000 RSI: ffffffff88501e00 RDI: ffffffff8bad7720
kernel BUG at lib/list_debug.c:50!
invalid opcode: 0000 [#4] PREEMPT SMP KASAN
RBP: ffff8881d381f970 R08: ffffed103ec84e99 R09: ffffed103ec84e98
CPU: 1 PID: 9271 Comm: syz-executor.2 Tainted: G    B D           4.19.196-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x4a lib/list_debug.c:48
Code: f7 ff 0f 0b 48 89 f1 48 c7 c7 c0 1f 50 88 48 89 de e8 ac fa f7 ff 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 21 50 88 e8 98 fa f7 ff <0f> 0b 4c 89 ea 48 89 de 48 c7 c7 a0 20 50 88 e8 84 fa f7 ff 0f 0b
RSP: 0018:ffff8881cdf1f958 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff8881f3e71c80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88501e00 RDI: ffffffff8bad7720
RBP: ffff8881cdf1f970 R08: ffffed103eca4e99 R09: ffffed103eca4e98
R10: ffffed103eca4e98 R11: ffff8881f65274c7 R12: dead000000000200
R13: ffff8881f52e9980 R14: ffff8881f52e9980 R15: dffffc0000000000
FS:  00007f91643ef700(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9bf10b1000 CR3: 00000001d1685004 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 coalesced_mmio_destructor+0x1a/0x150 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:99
 kvm_iodevice_destructor include/kvm/iodev.h:73 [inline]
 kvm_vm_ioctl_unregister_coalesced_mmio+0x199/0x2a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:181
 kvm_vm_ioctl+0x5ac/0x1770 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3251
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91643ef188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465889
RDX: 0000000020000180 RSI: 000000004010ae68 RDI: 0000000000000004
RBP: 00007f91643ef1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe3554e2df R14: 00007f91643ef300 R15: 0000000000022000
Modules linked in:
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0