Re: [syzbot] [bluetooth?] WARNING in hci_conn_set_handle

[syzbot]

Hello,

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

[    T1] usbcore: registered new interface driver rtsx_usb
[    9.001776][    T1] usbcore: registered new interface driver viperboard
[    9.003717][    T1] usbcore: registered new interface driver dln2
[    9.005598][    T1] usbcore: registered new interface driver pn533_usb
[    9.013420][    T1] nfcsim 0.2 initialized
[    9.014891][    T1] usbcore: registered new interface driver port100
[    9.017076][    T1] usbcore: registered new interface driver nfcmrvl
[    9.024386][    T1] Loading iSCSI transport class v2.0-870.
[    9.045243][    T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[    9.054420][    T1] ------------[ cut here ]------------
[    9.055600][    T1] refcount_t: decrement hit 0; leaking memory.
[    9.058135][    T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[    9.059662][    T1] Modules linked in:
[    9.060283][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4-syzkaller-g0bbac3facb5d #0
[    9.061791][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[    9.064097][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    9.065736][    T1] Code: b2 00 00 00 e8 17 b7 e7 fc 5b 5d c3 cc cc cc cc e8 0b b7 e7 fc c6 05 da 2a e6 0a 01 90 48 c7 c7 40 3b 1f 8c e8 67 51 aa fc 90 <0f> 0b 90 90 eb d9 e8 eb b6 e7 fc c6 05 b7 2a e6 0a 01 90 48 c7 c7
[    9.070788][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[    9.072245][    T1] RAX: 351085e3228a4100 RBX: ffff888140b8782c RCX: ffff8880166d0000
[    9.073867][    T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[    9.075497][    T1] RBP: 0000000000000004 R08: ffffffff815880a2 R09: fffffbfff1c39b48
[    9.077798][    T1] R10: dffffc0000000000 R11: fffffbfff1c39b48 R12: ffffea000502fdc0
[    9.079999][    T1] R13: ffffea000502fdc8 R14: 1ffffd4000a05fb9 R15: 0000000000000000
[    9.081851][    T1] FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[    9.083677][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.084919][    T1] CR2: ffff88823ffff000 CR3: 000000000e134000 CR4: 00000000003506f0
[    9.087312][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.089274][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.091115][    T1] Call Trace:
[    9.091939][    T1]  <TASK>
[    9.092755][    T1]  ? __warn+0x163/0x4e0
[    9.093619][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    9.095294][    T1]  ? report_bug+0x2b3/0x500
[    9.096601][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    9.097921][    T1]  ? handle_bug+0x3e/0x70
[    9.098837][    T1]  ? exc_invalid_op+0x1a/0x50
[    9.099638][    T1]  ? asm_exc_invalid_op+0x1a/0x20
[    9.100572][    T1]  ? __warn_printk+0x292/0x360
[    9.101393][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    9.102618][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
[    9.103558][    T1]  __free_pages_ok+0xc60/0xd90
[    9.104346][    T1]  make_alloc_exact+0xa3/0xf0
[    9.105584][    T1]  vring_alloc_queue_split+0x20a/0x600
[    9.107299][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    9.108282][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    9.109083][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    9.109892][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    9.111059][    T1]  ? really_probe+0x2b8/0xad0
[    9.111905][    T1]  ? driver_probe_device+0x50/0x430
[    9.112883][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    9.114048][    T1]  ? ret_from_fork+0x4b/0x80
[    9.115005][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    9.116583][    T1]  vring_create_virtqueue+0xca/0x110
[    9.117692][    T1]  ? __pfx_vp_notify+0x10/0x10
[    9.118573][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.119440][    T1]  setup_vq+0xe9/0x2d0
[    9.120171][    T1]  ? __pfx_vp_notify+0x10/0x10
[    9.121026][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.122122][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.123154][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.124442][    T1]  vp_setup_vq+0xbf/0x330
[    9.125185][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    9.126354][    T1]  ? ioread16+0x2f/0x90
[    9.127130][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.128255][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    9.129303][    T1]  vp_find_vqs+0x4c/0x4e0
[    9.130202][    T1]  virtscsi_init+0x8db/0xd00
[    9.131552][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    9.132275][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    9.133141][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    9.133889][    T1]  ? vp_get+0xfd/0x140
[    9.134477][    T1]  virtscsi_probe+0x3ea/0xf60
[    9.135321][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    9.136249][    T1]  ? kernfs_add_one+0x156/0x8b0
[    9.136999][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    9.137816][    T1]  ? virtio_features_ok+0x10c/0x270
[    9.138562][    T1]  virtio_dev_probe+0x991/0xaf0
[    9.139279][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    9.140212][    T1]  really_probe+0x2b8/0xad0
[    9.141018][    T1]  __driver_probe_device+0x1a2/0x390
[    9.141833][    T1]  driver_probe_device+0x50/0x430
[    9.142652][    T1]  __driver_attach+0x45f/0x710
[    9.143347][    T1]  ? __pfx___driver_attach+0x10/0x10
[    9.144150][    T1]  bus_for_each_dev+0x239/0x2b0
[    9.144879][    T1]  ? __pfx___driver_attach+0x10/0x10
[    9.145689][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    9.146652][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
[    9.147529][    T1]  bus_add_driver+0x347/0x620
[    9.148216][    T1]  driver_register+0x23a/0x320
[    9.149041][    T1]  virtio_scsi_init+0x69/0xe0
[    9.149787][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    9.150636][    T1]  do_one_initcall+0x248/0x880
[    9.151316][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    9.152299][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    9.153225][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    9.154272][    T1]  ? __pfx_parse_args+0x10/0x10
[    9.155071][    T1]  ? do_initcalls+0x1c/0x80
[    9.155945][    T1]  ? rcu_is_watching+0x15/0xb0
[    9.156723][    T1]  do_initcall_level+0x157/0x210
[    9.157685][    T1]  do_initcalls+0x3f/0x80
[    9.158363][    T1]  kernel_init_freeable+0x435/0x5d0
[    9.159252][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    9.160093][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    9.161282][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.162184][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.162958][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.163681][    T1]  kernel_init+0x1d/0x2b0
[    9.164282][    T1]  ret_from_fork+0x4b/0x80
[    9.164897][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.165604][    T1]  ret_from_fork_asm+0x1a/0x30
[    9.166304][    T1]  </TASK>
[    9.166746][    T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    9.167732][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4-syzkaller-g0bbac3facb5d #0
[    9.168948][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[    9.170299][    T1] Call Trace:
[    9.170755][    T1]  <TASK>
[    9.171219][    T1]  dump_stack_lvl+0x241/0x360
[    9.171943][    T1]  ? __pfx_dump_stack_lvl+0x10/0x10
[    9.172804][    T1]  ? __pfx__printk+0x10/0x10
[    9.173454][    T1]  ? _printk+0xd5/0x120
[    9.175261][    T1]  ? vscnprintf+0x5d/0x90
[    9.176277][    T1]  panic+0x349/0x860
[    9.176277][    T1]  ? __warn+0x172/0x4e0
[    9.176277][    T1]  ? __pfx_panic+0x10/0x10
[    9.176277][    T1]  ? show_trace_log_lvl+0x4e6/0x520
[    9.176277][    T1]  ? ret_from_fork_asm+0x1a/0x30
[    9.176277][    T1]  __warn+0x346/0x4e0
[    9.176277][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    9.176277][    T1]  report_bug+0x2b3/0x500
[    9.176277][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    9.176277][    T1]  handle_bug+0x3e/0x70
[    9.176277][    T1]  exc_invalid_op+0x1a/0x50
[    9.176277][    T1]  asm_exc_invalid_op+0x1a/0x20
[    9.176277][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    9.176277][    T1] Code: b2 00 00 00 e8 17 b7 e7 fc 5b 5d c3 cc cc cc cc e8 0b b7 e7 fc c6 05 da 2a e6 0a 01 90 48 c7 c7 40 3b 1f 8c e8 67 51 aa fc 90 <0f> 0b 90 90 eb d9 e8 eb b6 e7 fc c6 05 b7 2a e6 0a 01 90 48 c7 c7
[    9.176277][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[    9.176277][    T1] RAX: 351085e3228a4100 RBX: ffff888140b8782c RCX: ffff8880166d0000
[    9.176277][    T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[    9.176277][    T1] RBP: 0000000000000004 R08: ffffffff815880a2 R09: fffffbfff1c39b48
[    9.176277][    T1] R10: dffffc0000000000 R11: fffffbfff1c39b48 R12: ffffea000502fdc0
[    9.176277][    T1] R13: ffffea000502fdc8 R14: 1ffffd4000a05fb9 R15: 0000000000000000
[    9.176277][    T1]  ? __warn_printk+0x292/0x360
[    9.176277][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
[    9.176277][    T1]  __free_pages_ok+0xc60/0xd90
[    9.176277][    T1]  make_alloc_exact+0xa3/0xf0
[    9.176277][    T1]  vring_alloc_queue_split+0x20a/0x600
[    9.176277][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    9.176277][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    9.176277][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    9.176277][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    9.176277][    T1]  ? really_probe+0x2b8/0xad0
[    9.176277][    T1]  ? driver_probe_device+0x50/0x430
[    9.176277][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    9.176277][    T1]  ? ret_from_fork+0x4b/0x80
[    9.176277][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    9.176277][    T1]  vring_create_virtqueue+0xca/0x110
[    9.176277][    T1]  ? __pfx_vp_notify+0x10/0x10
[    9.176277][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.176277][    T1]  setup_vq+0xe9/0x2d0
[    9.176277][    T1]  ? __pfx_vp_notify+0x10/0x10
[    9.176277][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.176277][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.176277][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.176277][    T1]  vp_setup_vq+0xbf/0x330
[    9.176277][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    9.226166][    T1]  ? ioread16+0x2f/0x90
[    9.226237][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    9.226237][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    9.226237][    T1]  vp_find_vqs+0x4c/0x4e0
[    9.226237][    T1]  virtscsi_init+0x8db/0xd00
[    9.226237][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    9.226237][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    9.226237][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    9.226237][    T1]  ? vp_get+0xfd/0x140
[    9.226237][    T1]  virtscsi_probe+0x3ea/0xf60
[    9.226237][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    9.226237][    T1]  ? kernfs_add_one+0x156/0x8b0
[    9.226237][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    9.226237][    T1]  ? virtio_features_ok+0x10c/0x270
[    9.226237][    T1]  virtio_dev_probe+0x991/0xaf0
[    9.226237][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    9.226237][    T1]  really_probe+0x2b8/0xad0
[    9.226237][    T1]  __driver_probe_device+0x1a2/0x390
[    9.226237][    T1]  driver_probe_device+0x50/0x430
[    9.226237][    T1]  __driver_attach+0x45f/0x710
[    9.226237][    T1]  ? __pfx___driver_attach+0x10/0x10
[    9.226237][    T1]  bus_for_each_dev+0x239/0x2b0
[    9.226237][    T1]  ? __pfx___driver_attach+0x10/0x10
[    9.226237][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    9.226237][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
[    9.226237][    T1]  bus_add_driver+0x347/0x620
[    9.226237][    T1]  driver_register+0x23a/0x320
[    9.226237][    T1]  virtio_scsi_init+0x69/0xe0
[    9.226237][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    9.226237][    T1]  do_one_initcall+0x248/0x880
[    9.226237][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    9.226237][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    9.226237][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    9.226237][    T1]  ? __pfx_parse_args+0x10/0x10
[    9.226237][    T1]  ? do_initcalls+0x1c/0x80
[    9.226237][    T1]  ? rcu_is_watching+0x15/0xb0
[    9.226237][    T1]  do_initcall_level+0x157/0x210
[    9.226237][    T1]  do_initcalls+0x3f/0x80
[    9.226237][    T1]  kernel_init_freeable+0x435/0x5d0
[    9.226237][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    9.226237][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    9.226237][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.226237][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.226237][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.276351][    T1]  kernel_init+0x1d/0x2b0
[    9.276351][    T1]  ret_from_fork+0x4b/0x80
[    9.276351][    T1]  ? __pfx_kernel_init+0x10/0x10
[    9.276351][    T1]  ret_from_fork_asm+0x1a/0x30
[    9.276351][    T1]  </TASK>
[    9.276351][    T1] Kernel Offset: disabled
[    9.276351][    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-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/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-2/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-build3485891342=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 56086b24b
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=56086b24bdfd822d3b227edb3064db443cd8c971 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240409-083312'" "-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=56086b24bdfd822d3b227edb3064db443cd8c971 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240409-083312'" "-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=56086b24bdfd822d3b227edb3064db443cd8c971 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240409-083312'" "-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=\"56086b24bdfd822d3b227edb3064db443cd8c971\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=115a9fcb180000


Tested on:

commit:         0bbac3fa Linux 6.9-rc4
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
kernel config:  https://syzkaller.appspot.com/x/.config?x=c6e826cf3c9c6ffc
dashboard link: https://syzkaller.appspot.com/bug?extid=d6282a21a27259b5f7e7
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.