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Date: Sat, 30 Mar 2024 01:58:04 -0700
From: syzbot <syzbot+e4374f6c021d422de3d1@...kaller.appspotmail.com>
To: eadavis@...com, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bpf?] [net?] possible deadlock in tick_setup_sched_timer
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
drm_connector registered
[ 11.107844][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[ 11.126768][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
[ 11.235459][ T1] Console: switching to colour frame buffer device 128x48
[ 11.259808][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 11.267554][ T1] usbcore: registered new interface driver udl
[ 11.374239][ T1] brd: module loaded
[ 11.501139][ T1] loop: module loaded
[ 11.677668][ T1] zram: Added device: zram0
[ 11.695347][ T1] null_blk: disk nullb0 created
[ 11.700275][ T1] null_blk: module loaded
[ 11.706181][ T1] Guest personality initialized and is inactive
[ 11.713576][ T1] VMCI host device registered (name=vmci, major=10, minor=118)
[ 11.721442][ T1] Initialized host personality
[ 11.726520][ T1] usbcore: registered new interface driver rtsx_usb
[ 11.734397][ T1] usbcore: registered new interface driver viperboard
[ 11.742268][ T1] usbcore: registered new interface driver dln2
[ 11.749350][ T1] usbcore: registered new interface driver pn533_usb
[ 11.763332][ T1] nfcsim 0.2 initialized
[ 11.767821][ T1] usbcore: registered new interface driver port100
[ 11.775500][ T1] usbcore: registered new interface driver nfcmrvl
[ 11.790533][ T1] Loading iSCSI transport class v2.0-870.
[ 11.814992][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 11.834309][ T1] ------------[ cut here ]------------
[ 11.840069][ T1] refcount_t: decrement hit 0; leaking memory.
[ 11.846833][ T1] WARNING: CPU: 1 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210
[ 11.856073][ T1] Modules linked in:
[ 11.860032][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-syzkaller-g486291a0e624-dirty #0
[ 11.869766][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 11.879854][ T1] RIP: 0010:refcount_warn_saturate+0x1ed/0x210
[ 11.886039][ T1] Code: 8b e8 67 29 d2 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 58 bb 0f fd c6 05 0d eb 4c 0b 01 90 48 c7 c7 80 e5 8e 8b e8 44 29 d2 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 72 e7 6a fd e9 44 fe ff ff
[ 11.905771][ T1] RSP: 0000:ffffc900000673c0 EFLAGS: 00010286
[ 11.912115][ T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814fe149
[ 11.920354][ T1] RDX: ffff888016ec0000 RSI: ffffffff814fe156 RDI: 0000000000000001
[ 11.928321][ T1] RBP: ffff888020fac3bc R08: 0000000000000001 R09: 0000000000000000
[ 11.936315][ T1] R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020fac3bc
[ 11.944311][ T1] R13: 0000000000000000 R14: 00000000007400b9 R15: ffff888016853988
[ 11.952567][ T1] FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
[ 11.961512][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 11.968083][ T1] CR2: 0000000000000000 CR3: 000000000d97a000 CR4: 00000000003506f0
[ 11.976181][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 11.984211][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 11.992239][ T1] Call Trace:
[ 11.995530][ T1] <TASK>
[ 11.998452][ T1] ? show_regs+0x8c/0xa0
[ 12.002745][ T1] ? __warn+0xe5/0x3c0
[ 12.006810][ T1] ? __wake_up_klogd.part.0+0x99/0xf0
[ 12.012328][ T1] ? refcount_warn_saturate+0x1ed/0x210
[ 12.017871][ T1] ? report_bug+0x3c0/0x580
[ 12.022448][ T1] ? handle_bug+0x3d/0x70
[ 12.026794][ T1] ? exc_invalid_op+0x17/0x50
[ 12.031602][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 12.036639][ T1] ? __warn_printk+0x199/0x350
[ 12.041521][ T1] ? __warn_printk+0x1a6/0x350
[ 12.046283][ T1] ? refcount_warn_saturate+0x1ed/0x210
[ 12.051884][ T1] __reset_page_owner+0x2ea/0x370
[ 12.057140][ T1] __free_pages_ok+0x5a9/0xbf0
[ 12.061993][ T1] ? __split_page_owner+0xdd/0x120
[ 12.067111][ T1] make_alloc_exact+0x165/0x260
[ 12.072448][ T1] vring_alloc_queue+0xc1/0x110
[ 12.077349][ T1] vring_alloc_queue_split+0x186/0x510
[ 12.082874][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 12.088882][ T1] ? kasan_save_stack+0x42/0x60
[ 12.093828][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.099615][ T1] vring_create_virtqueue_split+0xe8/0x280
[ 12.105518][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.110328][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 12.116731][ T1] ? virtio_scsi_init+0x75/0x100
[ 12.121740][ T1] ? do_one_initcall+0x128/0x700
[ 12.126695][ T1] ? kernel_init_freeable+0x69d/0xca0
[ 12.132157][ T1] vring_create_virtqueue+0xd7/0x140
[ 12.137433][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.142247][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.148576][ T1] setup_vq+0x123/0x2f0
[ 12.152766][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.157544][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.163473][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.169167][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.174836][ T1] vp_setup_vq+0xb1/0x380
[ 12.179545][ T1] ? iowrite16+0x55/0x80
[ 12.183910][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.189632][ T1] vp_find_vqs_msix+0x661/0xe30
[ 12.194484][ T1] vp_find_vqs+0x58/0x560
[ 12.198919][ T1] virtscsi_init+0x459/0x9f0
[ 12.203694][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 12.209111][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 12.214606][ T1] ? ioread8+0x4e/0xa0
[ 12.218920][ T1] ? vp_get+0xf6/0x140
[ 12.223023][ T1] virtscsi_probe+0x3b2/0xdd0
[ 12.227732][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 12.233079][ T1] ? trace_raw_output_sched_pi_setprio+0xad/0x150
[ 12.239751][ T1] ? vring_transport_features+0x49/0xb0
[ 12.245404][ T1] virtio_dev_probe+0x5ff/0x9b0
[ 12.250546][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.255937][ T1] really_probe+0x23e/0xa90
[ 12.260516][ T1] __driver_probe_device+0x1de/0x440
[ 12.265804][ T1] ? _raw_spin_unlock_irqrestore+0x52/0x80
[ 12.271660][ T1] driver_probe_device+0x4c/0x1b0
[ 12.276686][ T1] __driver_attach+0x283/0x580
[ 12.281478][ T1] ? __pfx___driver_attach+0x10/0x10
[ 12.286756][ T1] bus_for_each_dev+0x13c/0x1d0
[ 12.291626][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 12.297077][ T1] bus_add_driver+0x2ed/0x640
[ 12.301781][ T1] driver_register+0x15c/0x4b0
[ 12.306529][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 12.311922][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 12.317285][ T1] virtio_scsi_init+0x75/0x100
[ 12.322232][ T1] do_one_initcall+0x128/0x700
[ 12.327308][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 12.332699][ T1] ? trace_kmalloc+0x2d/0xe0
[ 12.337296][ T1] ? __kmalloc+0x218/0x440
[ 12.341776][ T1] kernel_init_freeable+0x69d/0xca0
[ 12.346990][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.351965][ T1] kernel_init+0x1c/0x2b0
[ 12.356292][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.361247][ T1] ret_from_fork+0x45/0x80
[ 12.365684][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.370654][ T1] ret_from_fork_asm+0x1a/0x30
[ 12.375521][ T1] </TASK>
[ 12.378535][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 12.380634][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-syzkaller-g486291a0e624-dirty #0
[ 12.380634][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 12.380634][ T1] Call Trace:
[ 12.380634][ T1] <TASK>
[ 12.380634][ T1] dump_stack_lvl+0x3d/0x1f0
[ 12.380634][ T1] panic+0x6f5/0x7a0
[ 12.380634][ T1] ? __pfx_panic+0x10/0x10
[ 12.380634][ T1] ? show_trace_log_lvl+0x363/0x500
[ 12.428930][ T1] ? check_panic_on_warn+0x1f/0xb0
[ 12.428930][ T1] ? refcount_warn_saturate+0x1ed/0x210
[ 12.428930][ T1] check_panic_on_warn+0xab/0xb0
[ 12.428930][ T1] __warn+0xf1/0x3c0
[ 12.428930][ T1] ? __wake_up_klogd.part.0+0x99/0xf0
[ 12.428930][ T1] ? refcount_warn_saturate+0x1ed/0x210
[ 12.428930][ T1] report_bug+0x3c0/0x580
[ 12.428930][ T1] handle_bug+0x3d/0x70
[ 12.428930][ T1] exc_invalid_op+0x17/0x50
[ 12.428930][ T1] asm_exc_invalid_op+0x1a/0x20
[ 12.478917][ T1] RIP: 0010:refcount_warn_saturate+0x1ed/0x210
[ 12.478917][ T1] Code: 8b e8 67 29 d2 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 58 bb 0f fd c6 05 0d eb 4c 0b 01 90 48 c7 c7 80 e5 8e 8b e8 44 29 d2 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 72 e7 6a fd e9 44 fe ff ff
[ 12.478917][ T1] RSP: 0000:ffffc900000673c0 EFLAGS: 00010286
[ 12.478917][ T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814fe149
[ 12.478917][ T1] RDX: ffff888016ec0000 RSI: ffffffff814fe156 RDI: 0000000000000001
[ 12.478917][ T1] RBP: ffff888020fac3bc R08: 0000000000000001 R09: 0000000000000000
[ 12.528953][ T1] R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020fac3bc
[ 12.528953][ T1] R13: 0000000000000000 R14: 00000000007400b9 R15: ffff888016853988
[ 12.528953][ T1] ? __warn_printk+0x199/0x350
[ 12.528953][ T1] ? __warn_printk+0x1a6/0x350
[ 12.528953][ T1] __reset_page_owner+0x2ea/0x370
[ 12.528953][ T1] __free_pages_ok+0x5a9/0xbf0
[ 12.528953][ T1] ? __split_page_owner+0xdd/0x120
[ 12.528953][ T1] make_alloc_exact+0x165/0x260
[ 12.579003][ T1] vring_alloc_queue+0xc1/0x110
[ 12.579003][ T1] vring_alloc_queue_split+0x186/0x510
[ 12.579003][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 12.579003][ T1] ? kasan_save_stack+0x42/0x60
[ 12.579003][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.579003][ T1] vring_create_virtqueue_split+0xe8/0x280
[ 12.579003][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.579003][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 12.579003][ T1] ? virtio_scsi_init+0x75/0x100
[ 12.628847][ T1] ? do_one_initcall+0x128/0x700
[ 12.628847][ T1] ? kernel_init_freeable+0x69d/0xca0
[ 12.628847][ T1] vring_create_virtqueue+0xd7/0x140
[ 12.628847][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.628847][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.628847][ T1] setup_vq+0x123/0x2f0
[ 12.628847][ T1] ? __pfx_vp_notify+0x10/0x10
[ 12.628847][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.628847][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.628847][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.678924][ T1] vp_setup_vq+0xb1/0x380
[ 12.678924][ T1] ? iowrite16+0x55/0x80
[ 12.678924][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 12.678924][ T1] vp_find_vqs_msix+0x661/0xe30
[ 12.678924][ T1] vp_find_vqs+0x58/0x560
[ 12.678924][ T1] virtscsi_init+0x459/0x9f0
[ 12.678924][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 12.678924][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 12.678924][ T1] ? ioread8+0x4e/0xa0
[ 12.678924][ T1] ? vp_get+0xf6/0x140
[ 12.728908][ T1] virtscsi_probe+0x3b2/0xdd0
[ 12.728908][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 12.728908][ T1] ? trace_raw_output_sched_pi_setprio+0xad/0x150
[ 12.728908][ T1] ? vring_transport_features+0x49/0xb0
[ 12.728908][ T1] virtio_dev_probe+0x5ff/0x9b0
[ 12.728908][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.728908][ T1] really_probe+0x23e/0xa90
[ 12.728908][ T1] __driver_probe_device+0x1de/0x440
[ 12.728908][ T1] ? _raw_spin_unlock_irqrestore+0x52/0x80
[ 12.778943][ T1] driver_probe_device+0x4c/0x1b0
[ 12.778943][ T1] __driver_attach+0x283/0x580
[ 12.778943][ T1] ? __pfx___driver_attach+0x10/0x10
[ 12.778943][ T1] bus_for_each_dev+0x13c/0x1d0
[ 12.778943][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 12.778943][ T1] bus_add_driver+0x2ed/0x640
[ 12.778943][ T1] driver_register+0x15c/0x4b0
[ 12.778943][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 12.778943][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 12.778943][ T1] virtio_scsi_init+0x75/0x100
[ 12.828878][ T1] do_one_initcall+0x128/0x700
[ 12.828878][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 12.828878][ T1] ? trace_kmalloc+0x2d/0xe0
[ 12.828878][ T1] ? __kmalloc+0x218/0x440
[ 12.828878][ T1] kernel_init_freeable+0x69d/0xca0
[ 12.828878][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.828878][ T1] kernel_init+0x1c/0x2b0
[ 12.828878][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.828878][ T1] ret_from_fork+0x45/0x80
[ 12.828878][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.878911][ T1] ret_from_fork_asm+0x1a/0x30
[ 12.878911][ T1] </TASK>
[ 12.878911][ T1] Kernel Offset: disabled
[ 12.878911][ 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-build3952729973=/tmp/go-build -gno-record-gcc-switches'
git status (err=<nil>)
HEAD detached at 120789fd6
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=120789fd6691dd038dbe206ceeed95be5c006364 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240327-181839'" "-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=120789fd6691dd038dbe206ceeed95be5c006364 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240327-181839'" "-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=120789fd6691dd038dbe206ceeed95be5c006364 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240327-181839'" "-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=\"120789fd6691dd038dbe206ceeed95be5c006364\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1464b30d180000
Tested on:
commit: 486291a0 Merge tag 'drm-fixes-2024-03-30' of https://g..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
kernel config: https://syzkaller.appspot.com/x/.config?x=f64ec427e98bccd7
dashboard link: https://syzkaller.appspot.com/bug?extid=e4374f6c021d422de3d1
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=16783ae5180000
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