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SubjectRe: [syzbot] [fs?] possible deadlock in input_event (2)
From
Hello,

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

ered new interface driver rtsx_usb
[ 7.634517][ T1] usbcore: registered new interface driver viperboard
[ 7.636633][ T1] usbcore: registered new interface driver dln2
[ 7.637993][ T1] usbcore: registered new interface driver pn533_usb
[ 7.644508][ T1] nfcsim 0.2 initialized
[ 7.645311][ T1] usbcore: registered new interface driver port100
[ 7.646749][ T1] usbcore: registered new interface driver nfcmrvl
[ 7.653669][ T1] Loading iSCSI transport class v2.0-870.
[ 7.673487][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 7.682830][ T1] ------------[ cut here ]------------
[ 7.683827][ T1] refcount_t: decrement hit 0; leaking memory.
[ 7.685157][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[ 7.687468][ T1] Modules linked in:
[ 7.688124][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4-syzkaller-00113-g2668e3ae2ef3-dirty #0
[ 7.689750][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 7.691310][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.692391][ T1] Code: b2 00 00 00 e8 f7 25 e7 fc 5b 5d c3 cc cc cc cc e8 eb 25 e7 fc c6 05 b9 a2 e5 0a 01 90 48 c7 c7 80 3d 1f 8c e8 47 c0 a9 fc 90 <0f> 0b 90 90 eb d9 e8 cb 25 e7 fc c6 05 96 a2 e5 0a 01 90 48 c7 c7
[ 7.695171][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[ 7.696459][ T1] RAX: 215871e6f02e7200 RBX: ffff88814072374c RCX: ffff8880166d0000
[ 7.697689][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.698819][ T1] RBP: 0000000000000004 R08: ffffffff815880a2 R09: fffffbfff1c39b48
[ 7.699877][ T1] R10: dffffc0000000000 R11: fffffbfff1c39b48 R12: ffffea0000846dc0
[ 7.701019][ T1] R13: ffffea0000846dc8 R14: 1ffffd4000108db9 R15: 0000000000000000
[ 7.702376][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[ 7.703947][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.704958][ T1] CR2: ffff88823ffff000 CR3: 000000000e134000 CR4: 00000000003506f0
[ 7.706361][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7.707631][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 7.708825][ T1] Call Trace:
[ 7.709413][ T1] <TASK>
[ 7.709929][ T1] ? __warn+0x163/0x4e0
[ 7.710644][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.711650][ T1] ? report_bug+0x2b3/0x500
[ 7.712569][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.713521][ T1] ? handle_bug+0x3e/0x70
[ 7.714155][ T1] ? exc_invalid_op+0x1a/0x50
[ 7.714820][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 7.715528][ T1] ? __warn_printk+0x292/0x360
[ 7.716343][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.717135][ T1] ? refcount_warn_saturate+0xf9/0x1d0
[ 7.718192][ T1] __free_pages_ok+0xc60/0xd90
[ 7.718893][ T1] make_alloc_exact+0xa3/0xf0
[ 7.719753][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.720878][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.721837][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.722631][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.723321][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.724085][ T1] ? really_probe+0x2b8/0xad0
[ 7.725035][ T1] ? driver_probe_device+0x50/0x430
[ 7.725939][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.726833][ T1] ? ret_from_fork+0x4b/0x80
[ 7.727545][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.728856][ T1] vring_create_virtqueue+0xca/0x110
[ 7.729802][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.730501][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.731766][ T1] setup_vq+0xe9/0x2d0
[ 7.732420][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.733372][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.734230][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.735111][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.735961][ T1] vp_setup_vq+0xbf/0x330
[ 7.736791][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.738100][ T1] ? ioread16+0x2f/0x90
[ 7.738752][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.739755][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.740621][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.741314][ T1] virtscsi_init+0x8db/0xd00
[ 7.742665][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.743385][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.744188][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.744880][ T1] ? vp_get+0xfd/0x140
[ 7.745886][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.746690][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.747405][ T1] ? kernfs_add_one+0x156/0x8b0
[ 7.748307][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.749465][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.750275][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.751073][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.751895][ T1] really_probe+0x2b8/0xad0
[ 7.752754][ T1] __driver_probe_device+0x1a2/0x390
[ 7.754208][ T1] driver_probe_device+0x50/0x430
[ 7.755539][ T1] __driver_attach+0x45f/0x710
[ 7.756521][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.757862][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.758718][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.759488][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.760237][ T1] ? do_raw_spin_unlock+0x13c/0x8b0
[ 7.761233][ T1] bus_add_driver+0x347/0x620
[ 7.762229][ T1] driver_register+0x23a/0x320
[ 7.763093][ T1] virtio_scsi_init+0x69/0xe0
[ 7.763779][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.764701][ T1] do_one_initcall+0x248/0x880
[ 7.765411][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.766339][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.767256][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.768182][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.769173][ T1] ? do_initcalls+0x1c/0x80
[ 7.770103][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.771124][ T1] do_initcall_level+0x157/0x210
[ 7.772065][ T1] do_initcalls+0x3f/0x80
[ 7.772851][ T1] kernel_init_freeable+0x435/0x5d0
[ 7.773659][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.774557][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.776278][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.777202][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.777966][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.778686][ T1] kernel_init+0x1d/0x2b0
[ 7.779531][ T1] ret_from_fork+0x4b/0x80
[ 7.780153][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.780872][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.781578][ T1] </TASK>
[ 7.782050][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 7.783113][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4-syzkaller-00113-g2668e3ae2ef3-dirty #0
[ 7.784483][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 7.786150][ T1] Call Trace:
[ 7.786150][ T1] <TASK>
[ 7.786150][ T1] dump_stack_lvl+0x241/0x360
[ 7.786150][ T1] ? __pfx_dump_stack_lvl+0x10/0x10
[ 7.786150][ T1] ? __pfx__printk+0x10/0x10
[ 7.786150][ T1] ? _printk+0xd5/0x120
[ 7.786150][ T1] ? vscnprintf+0x5d/0x90
[ 7.786150][ T1] panic+0x349/0x860
[ 7.786150][ T1] ? __warn+0x172/0x4e0
[ 7.786150][ T1] ? __pfx_panic+0x10/0x10
[ 7.786150][ T1] ? show_trace_log_lvl+0x4e6/0x520
[ 7.786150][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.786150][ T1] __warn+0x346/0x4e0
[ 7.786150][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.786150][ T1] report_bug+0x2b3/0x500
[ 7.796183][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.796183][ T1] handle_bug+0x3e/0x70
[ 7.796183][ T1] exc_invalid_op+0x1a/0x50
[ 7.796183][ T1] asm_exc_invalid_op+0x1a/0x20
[ 7.796183][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.796183][ T1] Code: b2 00 00 00 e8 f7 25 e7 fc 5b 5d c3 cc cc cc cc e8 eb 25 e7 fc c6 05 b9 a2 e5 0a 01 90 48 c7 c7 80 3d 1f 8c e8 47 c0 a9 fc 90 <0f> 0b 90 90 eb d9 e8 cb 25 e7 fc c6 05 96 a2 e5 0a 01 90 48 c7 c7
[ 7.796183][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[ 7.796183][ T1] RAX: 215871e6f02e7200 RBX: ffff88814072374c RCX: ffff8880166d0000
[ 7.796183][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.806084][ T1] RBP: 0000000000000004 R08: ffffffff815880a2 R09: fffffbfff1c39b48
[ 7.806084][ T1] R10: dffffc0000000000 R11: fffffbfff1c39b48 R12: ffffea0000846dc0
[ 7.806084][ T1] R13: ffffea0000846dc8 R14: 1ffffd4000108db9 R15: 0000000000000000
[ 7.806084][ T1] ? __warn_printk+0x292/0x360
[ 7.806084][ T1] ? refcount_warn_saturate+0xf9/0x1d0
[ 7.806084][ T1] __free_pages_ok+0xc60/0xd90
[ 7.806084][ T1] make_alloc_exact+0xa3/0xf0
[ 7.806084][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.806084][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.806084][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.806084][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.816141][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.816141][ T1] ? really_probe+0x2b8/0xad0
[ 7.816141][ T1] ? driver_probe_device+0x50/0x430
[ 7.816141][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.816141][ T1] ? ret_from_fork+0x4b/0x80
[ 7.816141][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.816141][ T1] vring_create_virtqueue+0xca/0x110
[ 7.816141][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.816141][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.816141][ T1] setup_vq+0xe9/0x2d0
[ 7.816141][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.816141][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.816141][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.826063][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.826063][ T1] vp_setup_vq+0xbf/0x330
[ 7.826063][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.826063][ T1] ? ioread16+0x2f/0x90
[ 7.826063][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.826063][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.826063][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.826063][ T1] virtscsi_init+0x8db/0xd00
[ 7.826063][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.826063][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.826063][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.826063][ T1] ? vp_get+0xfd/0x140
[ 7.826063][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.826063][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.836184][ T1] ? kernfs_add_one+0x156/0x8b0
[ 7.836184][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.836184][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.836184][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.836184][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.836184][ T1] really_probe+0x2b8/0xad0
[ 7.836184][ T1] __driver_probe_device+0x1a2/0x390
[ 7.836184][ T1] driver_probe_device+0x50/0x430
[ 7.836184][ T1] __driver_attach+0x45f/0x710
[ 7.836184][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.836184][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.836184][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.846105][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.846105][ T1] ? do_raw_spin_unlock+0x13c/0x8b0
[ 7.846105][ T1] bus_add_driver+0x347/0x620
[ 7.846105][ T1] driver_register+0x23a/0x320
[ 7.846105][ T1] virtio_scsi_init+0x69/0xe0
[ 7.846105][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.846105][ T1] do_one_initcall+0x248/0x880
[ 7.846105][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.846105][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.846105][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.846105][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.846105][ T1] ? do_initcalls+0x1c/0x80
[ 7.846105][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.856222][ T1] do_initcall_level+0x157/0x210
[ 7.856222][ T1] do_initcalls+0x3f/0x80
[ 7.856222][ T1] kernel_init_freeable+0x435/0x5d0
[ 7.856222][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.856222][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.856222][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.856222][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.856222][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.856222][ T1] kernel_init+0x1d/0x2b0
[ 7.856222][ T1] ret_from_fork+0x4b/0x80
[ 7.856222][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.856222][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.856222][ T1] </TASK>
[ 7.866111][ T1] Kernel Offset: disabled
[ 7.866111][ 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-build2070068173=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 478efa7f2
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=478efa7f2f5af720ac23b860a65d458f3db39b0c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240411-101510'" "-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=478efa7f2f5af720ac23b860a65d458f3db39b0c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240411-101510'" "-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=478efa7f2f5af720ac23b860a65d458f3db39b0c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240411-101510'" "-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=\"478efa7f2f5af720ac23b860a65d458f3db39b0c\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=12c085f7180000


Tested on:

commit: 2668e3ae Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=c6e826cf3c9c6ffc
dashboard link: https://syzkaller.appspot.com/bug?extid=d4c06e848a1c1f9f726f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=154085f7180000


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