Re: [syzbot] [sound?] possible deadlock in snd_pcm_period_elapsed (4)

From: syzbot
Date: Sat Mar 16 2024 - 02:04:15 EST

Hello,

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

12.943031][ T1] IPVS: [mh] scheduler registered.
[ 12.948210][ T1] IPVS: [sed] scheduler registered.
[ 12.953811][ T1] IPVS: [nq] scheduler registered.
[ 12.958959][ T1] IPVS: [twos] scheduler registered.
[ 12.964757][ T1] IPVS: [sip] pe registered.
[ 12.969994][ T1] ipip: IPv4 and MPLS over IPv4 tunneling driver
[ 12.980131][ T1] gre: GRE over IPv4 demultiplexor driver
[ 12.986107][ T1] ip_gre: GRE over IPv4 tunneling driver
[ 13.002885][ T1] IPv4 over IPsec tunneling driver
[ 13.013497][ T1] Initializing XFRM netlink socket
[ 13.019152][ T1] IPsec XFRM device driver
[ 13.024288][ T1] NET: Registered PF_INET6 protocol family
[ 13.044269][ T1] Segment Routing with IPv6
[ 13.049148][ T1] RPL Segment Routing with IPv6
[ 13.054335][ T1] In-situ OAM (IOAM) with IPv6
[ 13.059809][ T1] mip6: Mobile IPv6
[ 13.068217][ T1] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 13.084725][ T1] ip6_gre: GRE over IPv6 tunneling driver
[ 13.094832][ T1] NET: Registered PF_PACKET protocol family
[ 13.100861][ T1] NET: Registered PF_KEY protocol family
[ 13.107075][ T1] Bridge firewalling registered
[ 13.112811][ T1] NET: Registered PF_X25 protocol family
[ 13.118805][ T1] X25: Linux Version 0.2
[ 13.171958][ T1] NET: Registered PF_NETROM protocol family
[ 13.231378][ T1] NET: Registered PF_ROSE protocol family
[ 13.237759][ T1] NET: Registered PF_AX25 protocol family
[ 13.243628][ T1] can: controller area network core
[ 13.249225][ T1] NET: Registered PF_CAN protocol family
[ 13.254866][ T1] can: raw protocol
[ 13.260173][ T1] can: broadcast manager protocol
[ 13.265261][ T1] can: netlink gateway - max_hops=1
[ 13.270756][ T1] can: SAE J1939
[ 13.274343][ T1] can: isotp protocol (max_pdu_size 8300)
[ 13.280558][ T1] Bluetooth: RFCOMM TTY layer initialized
[ 13.287006][ T1] Bluetooth: RFCOMM socket layer initialized
[ 13.293219][ T1] Bluetooth: RFCOMM ver 1.11
[ 13.298196][ T1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 13.304369][ T1] Bluetooth: BNEP filters: protocol multicast
[ 13.310576][ T1] Bluetooth: BNEP socket layer initialized
[ 13.316420][ T1] Bluetooth: CMTP (CAPI Emulation) ver 1.0
[ 13.322246][ T1] Bluetooth: CMTP socket layer initialized
[ 13.328135][ T1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 13.334946][ T1] Bluetooth: HIDP socket layer initialized
[ 13.344387][ T1] NET: Registered PF_RXRPC protocol family
[ 13.350330][ T1] Key type rxrpc registered
[ 13.354846][ T1] Key type rxrpc_s registered
[ 13.360283][ T1] NET: Registered PF_KCM protocol family
[ 13.366731][ T1] lec:lane_module_init: lec.c: initialized
[ 13.372544][ T1] mpoa:atm_mpoa_init: mpc.c: initialized
[ 13.378511][ T1] l2tp_core: L2TP core driver, V2.0
[ 13.383910][ T1] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[ 13.389565][ T1] l2tp_ip: L2TP IP encapsulation support (L2TPv3)
[ 13.396254][ T1] l2tp_netlink: L2TP netlink interface
[ 13.401985][ T1] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
[ 13.408805][ T1] l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
[ 13.417012][ T1] NET: Registered PF_PHONET protocol family
[ 13.423231][ T1] 8021q: 802.1Q VLAN Support v1.8
[ 13.444693][ T1] DCCP: Activated CCID 2 (TCP-like)
[ 13.450195][ T1] DCCP: Activated CCID 3 (TCP-Friendly Rate Control)
[ 13.457434][ T1] DCCP is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
[ 13.469019][ T1] sctp: Hash tables configured (bind 32/56)
[ 13.477144][ T1] NET: Registered PF_RDS protocol family
[ 13.483759][ T1] Registered RDS/infiniband transport
[ 13.490657][ T1] Registered RDS/tcp transport
[ 13.495427][ T1] tipc: Activated (version 2.0.0)
[ 13.502074][ T1] NET: Registered PF_TIPC protocol family
[ 13.509135][ T1] tipc: Started in single node mode
[ 13.515425][ T1] NET: Registered PF_SMC protocol family
[ 13.521519][ T1] 9pnet: Installing 9P2000 support
[ 13.527264][ T1] NET: Registered PF_CAIF protocol family
[ 13.538490][ T1] NET: Registered PF_IEEE802154 protocol family
[ 13.545010][ T1] Key type dns_resolver registered
[ 13.550298][ T1] Key type ceph registered
[ 13.555300][ T1] libceph: loaded (mon/osd proto 15/24)
[ 13.562208][ T1] batman_adv: B.A.T.M.A.N. advanced 2024.1 (compatibility version 15) loaded
[ 13.571294][ T1] openvswitch: Open vSwitch switching datapath
[ 13.581192][ T1] NET: Registered PF_VSOCK protocol family
[ 13.587645][ T1] mpls_gso: MPLS GSO support
[ 13.606375][ T1] IPI shorthand broadcast: enabled
[ 13.611614][ T1] AVX2 version of gcm_enc/dec engaged.
[ 13.617408][ T1] AES CTR mode by8 optimization enabled
[ 15.027917][ T1] sched_clock: Marking stable (14980033732, 45862812)->(15027552445, -1655901)
[ 15.060393][ T1] Timer migration: 1 hierarchy levels; 8 children per group; 0 crossnode level
[ 15.071403][ T1] registered taskstats version 1
[ 15.093857][ T1] Loading compiled-in X.509 certificates
[ 15.104512][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 991e12b3e9ed2951305419ad7742982355df57eb'
[ 15.401200][ T1] zswap: loaded using pool lzo/zsmalloc
[ 15.408732][ T1] debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers
[ 15.900621][ T1] ------------[ cut here ]------------
[ 15.906364][ T1] refcount_t: decrement hit 0; leaking memory.
[ 15.912957][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[ 15.922163][ T1] Modules linked in:
[ 15.926098][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11136-g66a27abac311-dirty #0
[ 15.935922][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[ 15.946042][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 15.952210][ T1] Code: b2 00 00 00 e8 e7 9b f5 fc 5b 5d c3 cc cc cc cc e8 db 9b f5 fc c6 05 b8 1e d2 0a 01 90 48 c7 c7 60 da fd 8b e8 57 61 b8 fc 90 <0f> 0b 90 90 eb d9 e8 bb 9b f5 fc c6 05 95 1e d2 0a 01 90 48 c7 c7
[ 15.971955][ T1] RSP: 0000:ffffc90000067660 EFLAGS: 00010246
[ 15.978221][ T1] RAX: 0fe32bb113e5bf00 RBX: ffff88802fb6472c RCX: ffff8880166c8000
[ 15.986337][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 15.994305][ T1] RBP: 0000000000000004 R08: ffffffff8157df32 R09: fffffbfff1bf9660
[ 16.002477][ T1] R10: dffffc0000000000 R11: fffffbfff1bf9660 R12: ffffea0001004000
[ 16.010484][ T1] R13: 0000000000000000 R14: 0000000000000000 R15: ffffea0001004008
[ 16.018469][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[ 16.027499][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.034061][ T1] CR2: ffff88823ffff000 CR3: 000000000df32000 CR4: 00000000003506f0
[ 16.042391][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 16.050505][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 16.058778][ T1] Call Trace:
[ 16.062157][ T1] <TASK>
[ 16.065073][ T1] ? __warn+0x163/0x4b0
[ 16.069266][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 16.074748][ T1] ? report_bug+0x2b3/0x500
[ 16.079564][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 16.085135][ T1] ? handle_bug+0x3e/0x70
[ 16.089485][ T1] ? exc_invalid_op+0x1a/0x50
[ 16.094158][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 16.099373][ T1] ? __warn_printk+0x292/0x360
[ 16.104139][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 16.109624][ T1] free_unref_page_prepare+0x95d/0xa80
[ 16.115106][ T1] free_unref_page+0x37/0x3f0
[ 16.119816][ T1] free_contig_range+0x9e/0x160
[ 16.124767][ T1] destroy_args+0xbf/0x930
[ 16.129207][ T1] debug_vm_pgtable+0x4be/0x550
[ 16.134142][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.139640][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 16.145480][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.151256][ T1] do_one_initcall+0x238/0x830
[ 16.156291][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.161763][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 16.167120][ T1] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 16.173394][ T1] ? __pfx_parse_args+0x10/0x10
[ 16.178404][ T1] ? lockdep_hardirqs_on+0x99/0x150
[ 16.183698][ T1] ? rcu_is_watching+0x15/0xb0
[ 16.188485][ T1] do_initcall_level+0x157/0x210
[ 16.193436][ T1] do_initcalls+0x3f/0x80
[ 16.197830][ T1] kernel_init_freeable+0x435/0x5d0
[ 16.203149][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 16.209002][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 16.215336][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.220450][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.225404][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.230363][ T1] kernel_init+0x1d/0x2b0
[ 16.234710][ T1] ret_from_fork+0x4b/0x80
[ 16.239252][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.244360][ T1] ret_from_fork_asm+0x1a/0x30
[ 16.249246][ T1] </TASK>
[ 16.252545][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 16.259895][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11136-g66a27abac311-dirty #0
[ 16.269779][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[ 16.279812][ T1] Call Trace:
[ 16.283087][ T1] <TASK>
[ 16.286006][ T1] dump_stack_lvl+0x241/0x360
[ 16.290695][ T1] ? __pfx_dump_stack_lvl+0x10/0x10
[ 16.295873][ T1] ? __pfx__printk+0x10/0x10
[ 16.300449][ T1] ? vscnprintf+0x5d/0x90
[ 16.304763][ T1] panic+0x349/0x860
[ 16.308647][ T1] ? __warn+0x172/0x4b0
[ 16.312869][ T1] ? __pfx_panic+0x10/0x10
[ 16.317443][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 16.322385][ T1] __warn+0x31e/0x4b0
[ 16.326346][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 16.331877][ T1] report_bug+0x2b3/0x500
[ 16.336186][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 16.341810][ T1] handle_bug+0x3e/0x70
[ 16.345964][ T1] exc_invalid_op+0x1a/0x50
[ 16.350577][ T1] asm_exc_invalid_op+0x1a/0x20
[ 16.355427][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 16.361582][ T1] Code: b2 00 00 00 e8 e7 9b f5 fc 5b 5d c3 cc cc cc cc e8 db 9b f5 fc c6 05 b8 1e d2 0a 01 90 48 c7 c7 60 da fd 8b e8 57 61 b8 fc 90 <0f> 0b 90 90 eb d9 e8 bb 9b f5 fc c6 05 95 1e d2 0a 01 90 48 c7 c7
[ 16.381608][ T1] RSP: 0000:ffffc90000067660 EFLAGS: 00010246
[ 16.387763][ T1] RAX: 0fe32bb113e5bf00 RBX: ffff88802fb6472c RCX: ffff8880166c8000
[ 16.395735][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 16.403711][ T1] RBP: 0000000000000004 R08: ffffffff8157df32 R09: fffffbfff1bf9660
[ 16.411751][ T1] R10: dffffc0000000000 R11: fffffbfff1bf9660 R12: ffffea0001004000
[ 16.419724][ T1] R13: 0000000000000000 R14: 0000000000000000 R15: ffffea0001004008
[ 16.427717][ T1] ? __warn_printk+0x292/0x360
[ 16.432558][ T1] free_unref_page_prepare+0x95d/0xa80
[ 16.438001][ T1] free_unref_page+0x37/0x3f0
[ 16.442973][ T1] free_contig_range+0x9e/0x160
[ 16.448493][ T1] destroy_args+0xbf/0x930
[ 16.453099][ T1] debug_vm_pgtable+0x4be/0x550
[ 16.457978][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.463467][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 16.469469][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.474941][ T1] do_one_initcall+0x238/0x830
[ 16.479709][ T1] ? __pfx_debug_vm_pgtable+0x10/0x10
[ 16.485072][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 16.490365][ T1] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 16.496385][ T1] ? __pfx_parse_args+0x10/0x10
[ 16.501233][ T1] ? lockdep_hardirqs_on+0x99/0x150
[ 16.506558][ T1] ? rcu_is_watching+0x15/0xb0
[ 16.511494][ T1] do_initcall_level+0x157/0x210
[ 16.516440][ T1] do_initcalls+0x3f/0x80
[ 16.520760][ T1] kernel_init_freeable+0x435/0x5d0
[ 16.526036][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 16.531754][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 16.538096][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.543023][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.547967][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.552913][ T1] kernel_init+0x1d/0x2b0
[ 16.557267][ T1] ret_from_fork+0x4b/0x80
[ 16.562141][ T1] ? __pfx_kernel_init+0x10/0x10
[ 16.567085][ T1] ret_from_fork_asm+0x1a/0x30
[ 16.572035][ T1] </TASK>
[ 16.575576][ T1] Kernel Offset: disabled
[ 16.579900][ 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-build501078772=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at d615901c7
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=d615901c739a765329b688494cee2f8e1b5037cb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240314-145638'" "-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=d615901c739a765329b688494cee2f8e1b5037cb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240314-145638'" "-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=d615901c739a765329b688494cee2f8e1b5037cb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240314-145638'" "-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=\"d615901c739a765329b688494cee2f8e1b5037cb\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=14921546180000


Tested on:

commit: 66a27aba Merge tag 'powerpc-6.9-1' of git://git.kernel..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
kernel config: https://syzkaller.appspot.com/x/.config?x=fe0919aedd4b3fc3
dashboard link: https://syzkaller.appspot.com/bug?extid=28c1a5a5b041a754b947
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=15c05ac9180000