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Message-ID: <00000000000041255406142db082@google.com>
Date: Thu, 21 Mar 2024 08:52:03 -0700
From: syzbot <syzbot+70f57d8a3ae84934c003@...kaller.appspotmail.com>
To: jasowang@...hat.com, linux-kernel@...r.kernel.org, 
	michael.christie@...cle.com, mst@...hat.com, osalvador@...e.de, 
	pbonzini@...hat.com, stefanha@...hat.com, syzkaller-bugs@...glegroups.com, 
	virtualization@...ts.linux.dev, xuanzhuo@...ux.alibaba.com
Subject: Re: [syzbot] [virtualization?] upstream boot error: WARNING: refcount
 bug in __free_pages_ok

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

bcore: registered new interface driver viperboard
[    7.297712][    T1] usbcore: registered new interface driver dln2
[    7.299149][    T1] usbcore: registered new interface driver pn533_usb
[    7.304759][  T924] kworker/u4:1 (924) used greatest stack depth: 22768 bytes left
[    7.308971][    T1] nfcsim 0.2 initialized
[    7.310068][    T1] usbcore: registered new interface driver port100
[    7.311312][    T1] usbcore: registered new interface driver nfcmrvl
[    7.318405][    T1] Loading iSCSI transport class v2.0-870.
[    7.334687][    T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[    7.344927][    T1] ------------[ cut here ]------------
[    7.345739][    T1] refcount_t: decrement hit 0; leaking memory.
[    7.346982][    T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[    7.348761][    T1] Modules linked in:
[    7.349418][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
[    7.351070][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[    7.352824][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    7.353979][    T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
[    7.358181][    T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
[    7.360206][    T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
[    7.362234][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[    7.363496][    T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
[    7.365139][    T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
[    7.366612][    T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
[    7.368171][    T1] FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[    7.370111][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    7.371030][    T1] CR2: ffff88823ffff000 CR3: 000000000df34000 CR4: 00000000003506f0
[    7.372121][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    7.373506][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    7.374889][    T1] Call Trace:
[    7.375371][    T1]  <TASK>
[    7.375798][    T1]  ? __warn+0x162/0x4b0
[    7.376442][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    7.377482][    T1]  ? report_bug+0x2b3/0x500
[    7.378161][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    7.379268][    T1]  ? handle_bug+0x3e/0x70
[    7.379887][    T1]  ? exc_invalid_op+0x1a/0x50
[    7.380563][    T1]  ? asm_exc_invalid_op+0x1a/0x20
[    7.381253][    T1]  ? __warn_printk+0x292/0x360
[    7.381912][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    7.382752][    T1]  __free_pages_ok+0xc36/0xd60
[    7.384180][    T1]  make_alloc_exact+0xc4/0x140
[    7.385037][    T1]  vring_alloc_queue_split+0x20a/0x600
[    7.386037][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    7.387029][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    7.387719][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    7.388408][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    7.389665][    T1]  ? really_probe+0x29e/0xc50
[    7.390429][    T1]  ? driver_probe_device+0x50/0x430
[    7.391176][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    7.392014][    T1]  ? ret_from_fork+0x4b/0x80
[    7.392800][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    7.394115][    T1]  vring_create_virtqueue+0xca/0x110
[    7.395151][    T1]  ? __pfx_vp_notify+0x10/0x10
[    7.395888][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.396674][    T1]  setup_vq+0xe9/0x2d0
[    7.397283][    T1]  ? __pfx_vp_notify+0x10/0x10
[    7.397938][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.398806][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.399938][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.400951][    T1]  vp_setup_vq+0xbf/0x330
[    7.401889][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    7.403092][    T1]  ? ioread16+0x2f/0x90
[    7.403909][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.405136][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    7.405892][    T1]  vp_find_vqs+0x4c/0x4e0
[    7.406823][    T1]  virtscsi_init+0x8db/0xd00
[    7.407669][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    7.408413][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    7.409369][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    7.410333][    T1]  ? vp_get+0xfd/0x140
[    7.410899][    T1]  virtscsi_probe+0x3ea/0xf60
[    7.411673][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    7.412520][    T1]  ? kernfs_add_one+0x159/0x8b0
[    7.413222][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    7.414081][    T1]  ? virtio_features_ok+0x10c/0x270
[    7.414875][    T1]  virtio_dev_probe+0x991/0xaf0
[    7.415574][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    7.416501][    T1]  really_probe+0x29e/0xc50
[    7.417330][    T1]  __driver_probe_device+0x1a2/0x3e0
[    7.418134][    T1]  driver_probe_device+0x50/0x430
[    7.418922][    T1]  __driver_attach+0x45f/0x710
[    7.419731][    T1]  ? __pfx___driver_attach+0x10/0x10
[    7.420653][    T1]  bus_for_each_dev+0x239/0x2b0
[    7.421541][    T1]  ? __pfx___driver_attach+0x10/0x10
[    7.422345][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    7.423094][    T1]  ? do_raw_spin_unlock+0x13b/0x8b0
[    7.423964][    T1]  bus_add_driver+0x347/0x620
[    7.424702][    T1]  driver_register+0x23a/0x320
[    7.425353][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.426126][    T1]  virtio_scsi_init+0x65/0xe0
[    7.426855][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.427617][    T1]  do_one_initcall+0x238/0x830
[    7.428285][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.429095][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    7.430084][    T1]  ? lockdep_hardirqs_on_prepare+0x43c/0x780
[    7.431238][    T1]  ? __pfx_parse_args+0x10/0x10
[    7.431953][    T1]  ? do_initcalls+0x1c/0x80
[    7.432616][    T1]  ? rcu_is_watching+0x15/0xb0
[    7.433413][    T1]  do_initcall_level+0x157/0x210
[    7.434175][    T1]  do_initcalls+0x3f/0x80
[    7.434918][    T1]  kernel_init_freeable+0x42f/0x5d0
[    7.435664][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    7.436745][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    7.437747][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.438487][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.439268][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.439947][    T1]  kernel_init+0x1d/0x2b0
[    7.440600][    T1]  ret_from_fork+0x4b/0x80
[    7.441572][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.442531][    T1]  ret_from_fork_asm+0x1b/0x30
[    7.443322][    T1]  </TASK>
[    7.443865][    T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    7.444976][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
[    7.446451][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[    7.447782][    T1] Call Trace:
[    7.448300][    T1]  <TASK>
[    7.448752][    T1]  dump_stack_lvl+0x1e7/0x2e0
[    7.449206][    T1]  ? __pfx_dump_stack_lvl+0x10/0x10
[    7.449206][    T1]  ? __pfx__printk+0x10/0x10
[    7.449206][    T1]  ? _printk+0xd5/0x120
[    7.449206][    T1]  ? vscnprintf+0x5d/0x90
[    7.449206][    T1]  panic+0x349/0x860
[    7.449206][    T1]  ? __warn+0x171/0x4b0
[    7.449206][    T1]  ? __pfx_panic+0x10/0x10
[    7.449206][    T1]  ? show_trace_log_lvl+0x4e4/0x520
[    7.449206][    T1]  ? ret_from_fork_asm+0x1b/0x30
[    7.449206][    T1]  __warn+0x31c/0x4b0
[    7.449206][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    7.449206][    T1]  report_bug+0x2b3/0x500
[    7.449206][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    7.458645][    T1]  handle_bug+0x3e/0x70
[    7.458645][    T1]  exc_invalid_op+0x1a/0x50
[    7.458645][    T1]  asm_exc_invalid_op+0x1a/0x20
[    7.458645][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    7.458645][    T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
[    7.458645][    T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
[    7.458645][    T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
[    7.458645][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[    7.468739][    T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
[    7.468739][    T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
[    7.468739][    T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
[    7.468739][    T1]  ? __warn_printk+0x292/0x360
[    7.468739][    T1]  __free_pages_ok+0xc36/0xd60
[    7.468739][    T1]  make_alloc_exact+0xc4/0x140
[    7.468739][    T1]  vring_alloc_queue_split+0x20a/0x600
[    7.468739][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    7.468739][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    7.468739][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    7.478647][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    7.478647][    T1]  ? really_probe+0x29e/0xc50
[    7.478647][    T1]  ? driver_probe_device+0x50/0x430
[    7.478647][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    7.478647][    T1]  ? ret_from_fork+0x4b/0x80
[    7.478647][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    7.478647][    T1]  vring_create_virtqueue+0xca/0x110
[    7.478647][    T1]  ? __pfx_vp_notify+0x10/0x10
[    7.478647][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.478647][    T1]  setup_vq+0xe9/0x2d0
[    7.478647][    T1]  ? __pfx_vp_notify+0x10/0x10
[    7.478647][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.488714][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.488714][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.488714][    T1]  vp_setup_vq+0xbf/0x330
[    7.488714][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    7.488714][    T1]  ? ioread16+0x2f/0x90
[    7.488714][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    7.488714][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    7.488714][    T1]  vp_find_vqs+0x4c/0x4e0
[    7.488714][    T1]  virtscsi_init+0x8db/0xd00
[    7.488714][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    7.488714][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    7.498614][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    7.498614][    T1]  ? vp_get+0xfd/0x140
[    7.498614][    T1]  virtscsi_probe+0x3ea/0xf60
[    7.498614][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    7.498614][    T1]  ? kernfs_add_one+0x159/0x8b0
[    7.498614][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    7.498614][    T1]  ? virtio_features_ok+0x10c/0x270
[    7.498614][    T1]  virtio_dev_probe+0x991/0xaf0
[    7.498614][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    7.498614][    T1]  really_probe+0x29e/0xc50
[    7.498614][    T1]  __driver_probe_device+0x1a2/0x3e0
[    7.508689][    T1]  driver_probe_device+0x50/0x430
[    7.508689][    T1]  __driver_attach+0x45f/0x710
[    7.508689][    T1]  ? __pfx___driver_attach+0x10/0x10
[    7.508689][    T1]  bus_for_each_dev+0x239/0x2b0
[    7.508689][    T1]  ? __pfx___driver_attach+0x10/0x10
[    7.508689][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    7.508689][    T1]  ? do_raw_spin_unlock+0x13b/0x8b0
[    7.508689][    T1]  bus_add_driver+0x347/0x620
[    7.508689][    T1]  driver_register+0x23a/0x320
[    7.508689][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.508689][    T1]  virtio_scsi_init+0x65/0xe0
[    7.518645][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.518645][    T1]  do_one_initcall+0x238/0x830
[    7.518645][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    7.518645][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    7.518645][    T1]  ? lockdep_hardirqs_on_prepare+0x43c/0x780
[    7.518645][    T1]  ? __pfx_parse_args+0x10/0x10
[    7.518645][    T1]  ? do_initcalls+0x1c/0x80
[    7.518645][    T1]  ? rcu_is_watching+0x15/0xb0
[    7.518645][    T1]  do_initcall_level+0x157/0x210
[    7.518645][    T1]  do_initcalls+0x3f/0x80
[    7.518645][    T1]  kernel_init_freeable+0x42f/0x5d0
[    7.528806][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    7.528806][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    7.528806][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.528806][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.528806][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.528806][    T1]  kernel_init+0x1d/0x2b0
[    7.528806][    T1]  ret_from_fork+0x4b/0x80
[    7.528806][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.528806][    T1]  ret_from_fork_asm+0x1b/0x30
[    7.528806][    T1]  </TASK>
[    7.528806][    T1] Kernel Offset: disabled
[    7.528806][    T1] Rebooting in 86400 seconds..


syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2530895313=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 6753db5cd
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"6753db5cdc04330ec9d1a5116b890c19481d69b3\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1254e231180000


Tested on:

commit:         217b2119 mm,page_owner: implement the tracking of the ..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.

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