Re: [syzbot] [gfs2?] INFO: task hung in gfs2_recover_journal (4)

[syzbot <syzbot+9013411dc43f3582823a@syzkaller.appspotmail.com>]

Hello,

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

t AMD or Hygon
[    5.383175][    T1] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[    5.384507][    T1] clocksource: Switched to clocksource tsc
[    5.395700][   T71] kworker/u8:4 (71) used greatest stack depth: 26984 bytes left
[    5.447120][    T1] Initialise system trusted keyrings
[    5.450534][    T1] workingset: timestamp_bits=40 (anon: 35) max_order=21 bucket_order=0 (anon: 0)
[    5.471694][    T1] DLM installed
[    5.482636][    T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    5.499493][    T1] NFS: Registering the id_resolver key type
[    5.499674][    T1] Key type id_resolver registered
[    5.499689][    T1] Key type id_legacy registered
[    5.500203][    T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    5.500423][    T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[    5.506292][    T1] smbdirect: subsystem loading...
[    5.535563][    T1] smbdirect: subsystem loaded
[    5.564553][    T1] Key type cifs.spnego registered
[    5.564932][    T1] Key type cifs.idmap registered
[    5.576442][    T1] ntfs3: Enabled Linux POSIX ACLs support
[    5.576459][    T1] ntfs3: Read-only LZX/Xpress compression included
[    5.583407][    T1] jffs2: version 2.2. (NAND) (SUMMARY)  © 2001-2006 Red Hat, Inc.
[    5.590657][    T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[    5.591227][    T1] QNX4 filesystem 0.2.3 registered.
[    5.591389][    T1] qnx6: QNX6 filesystem 1.0.0 registered.
[    5.593180][    T1] fuse: init (API version 7.45)
[    5.611293][    T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[    5.614078][    T1] orangefs_init: module version upstream loaded
[    5.615626][    T1] JFS: nTxBlock = 8192, nTxLock = 65536
[    5.645411][    T1] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
[    5.659918][    T1] 9p: Installing v9fs 9p2000 file system support
[    5.661040][    T1] NILFS version 2 loaded
[    5.661052][    T1] befs: version: 0.9.3
[    5.662922][    T1] ocfs2: Registered cluster interface o2cb
[    5.664569][    T1] ocfs2: Registered cluster interface user
[    5.665955][    T1] OCFS2 User DLM kernel interface loaded
[    5.713717][    T1] gfs2: GFS2 installed
[    5.738484][    T1] ceph: loaded (mds proto 32)
[    5.754167][    T1] cryptd: max_cpu_qlen set to 1000
[    5.793859][    T1] NET: Registered PF_ALG protocol family
[    5.794483][    T1] async_tx: api initialized (async)
[    5.794550][    T1] Key type asymmetric registered
[    5.794640][    T1] Asymmetric key parser 'x509' registered
[    5.794658][    T1] Asymmetric key parser 'pkcs8' registered
[    5.794674][    T1] Key type pkcs7_test registered
[    5.796268][    T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[    5.813490][    T1] io scheduler mq-deadline registered
[    5.813531][    T1] io scheduler kyber registered
[    5.815551][    T1] io scheduler bfq registered
[    5.820773][    T1] raid6: skipped pq benchmark and selected avx2x4
[    5.845694][  T158] kworker/u8:4 (158) used greatest stack depth: 26904 bytes left
[    5.851747][    T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[    5.856662][    T1] ACPI: button: Power Button [PWRF]
[    5.863410][    T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[    5.868788][    T1] ACPI: button: Sleep Button [SLPF]
[    5.913435][    T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[    5.971784][   T10] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[    5.971982][   T10] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[    6.034461][   T10] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[    6.034607][   T10] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[    6.096269][   T10] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[    6.096394][   T10] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[    6.133223][   T10] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[    6.387424][  T321] kworker/u8:8 (321) used greatest stack depth: 26856 bytes left
[    6.508457][  T374] kworker/u8:8 (374) used greatest stack depth: 26784 bytes left
[    6.769435][  T499] kworker/u8:8 (499) used greatest stack depth: 26752 bytes left
[    7.036059][  T630] kworker/u8:8 (630) used greatest stack depth: 25936 bytes left
[    7.240209][    T1] N_HDLC line discipline registered with maxframe=4096
[    7.241895][    T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    7.263328][    T1] 00:02: ttyS0 I/O:0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[    7.295911][    T1] 00:03: ttyS1 I/O:0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    7.326623][    T1] 00:04: ttyS2 I/O:0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[    7.356596][    T1] 00:05: ttyS3 I/O:0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[    7.412273][    T1] Non-volatile memory driver v1.3
[    7.457982][    T1] usbcore: registered new interface driver xillyusb
[    7.472322][    T1] ACPI: bus type drm_connector registered
[    7.486512][    T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[    7.497918][    T1] ------------[ cut here ]------------
[    7.497933][    T1] [PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup
[    7.497954][    T1] WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6d/0x1e60, CPU#1: swapper/0/1
[    7.498016][    T1] Modules linked in:
[    7.498057][    T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
[    7.498080][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
[    7.498096][    T1] RIP: 0010:drm_mode_config_validate+0x1cae/0x1e60
[    7.498128][    T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 0a 9d c6 fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 56 35 5a fc 49 bd 00 00 00 00 00 fc ff df
[    7.498150][    T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[    7.498168][    T1] RAX: 1ffff11004c1f008 RBX: dffffc0000000000 RCX: ffff88801cad5d00
[    7.498184][    T1] RDX: ffff888025bf1ea0 RSI: 0000000000000023 RDI: ffffffff8f981c70
[    7.498198][    T1] RBP: 0000000000000023 R08: 0000000000000000 R09: 0000000000000000
[    7.498210][    T1] R10: dffffc0000000000 R11: fffffbfff1f19cd0 R12: dffffc0000000000
[    7.498224][    T1] R13: ffffffff8f981c70 R14: ffff8880260f8040 R15: ffff8880260f8030
[    7.498244][    T1] FS:  0000000000000000(0000) GS:ffff8881261b4000(0000) knlGS:0000000000000000
[    7.498262][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    7.498276][    T1] CR2: 0000000000000000 CR3: 000000000ddb0000 CR4: 00000000003526f0
[    7.498291][    T1] Call Trace:
[    7.498297][    T1]  <TASK>
[    7.498321][    T1]  ? debugfs_create_file_full+0x3f/0x60
[    7.498349][    T1]  drm_dev_register+0x7f/0xd80
[    7.498378][    T1]  vkms_create+0x40d/0x4f0
[    7.498414][    T1]  ? __pfx_vkms_init+0x10/0x10
[    7.498443][    T1]  vkms_init+0x57/0x80
[    7.498468][    T1]  do_one_initcall+0x250/0x870
[    7.498496][    T1]  ? __pfx_vkms_init+0x10/0x10
[    7.498521][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    7.498553][    T1]  ? lapic_next_event+0x11/0x20
[    7.498585][    T1]  ? clockevents_program_event+0x491/0x630
[    7.498613][    T1]  ? __pfx___schedule+0x10/0x10
[    7.498662][    T1]  ? irqentry_exit+0x218/0x790
[    7.498692][    T1]  ? lockdep_hardirqs_on+0x7a/0x110
[    7.498722][    T1]  ? irqentry_exit+0x218/0x790
[    7.498751][    T1]  ? trace_irq_disable+0x3b/0x140
[    7.498792][    T1]  ? parameq+0xd6/0x170
[    7.498824][    T1]  ? next_arg+0x4a0/0x5e0
[    7.498858][    T1]  ? parameq+0x14d/0x170
[    7.498893][    T1]  ? parse_args+0x9c3/0xad0
[    7.498940][    T1]  ? trace_kmalloc+0x2a/0xf0
[    7.498972][    T1]  ? rcu_is_watching+0x15/0xb0
[    7.499001][    T1]  do_initcall_level+0x10a/0x1a0
[    7.499032][    T1]  ? kernel_init+0x22/0x1d0
[    7.499055][    T1]  do_initcalls+0x59/0xa0
[    7.499085][    T1]  kernel_init_freeable+0x29d/0x3e0
[    7.499115][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.499138][    T1]  kernel_init+0x22/0x1d0
[    7.499158][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.499179][    T1]  ret_from_fork+0x514/0xb70
[    7.499212][    T1]  ? __pfx_ret_from_fork+0x10/0x10
[    7.499240][    T1]  ? __switch_to+0xc89/0x1420
[    7.499268][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.499293][    T1]  ret_from_fork_asm+0x1a/0x30
[    7.499339][    T1]  </TASK>
[    7.499354][    T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    7.499370][    T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
[    7.499393][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
[    7.499405][    T1] Call Trace:
[    7.499413][    T1]  <TASK>
[    7.499422][    T1]  vpanic+0x56c/0xa60
[    7.499452][    T1]  ? __pfx__printk+0x10/0x10
[    7.499473][    T1]  ? __pfx_vpanic+0x10/0x10
[    7.499500][    T1]  ? is_bpf_text_address+0x292/0x2b0
[    7.499525][    T1]  ? is_bpf_text_address+0x26/0x2b0
[    7.499557][    T1]  panic+0xc5/0xd0
[    7.499586][    T1]  ? __pfx_panic+0x10/0x10
[    7.499624][    T1]  ? ret_from_fork_asm+0x1a/0x30
[    7.499659][    T1]  __warn+0x315/0x4c0
[    7.499687][    T1]  ? drm_mode_config_validate+0x1c6d/0x1e60
[    7.499716][    T1]  ? drm_mode_config_validate+0x1c6d/0x1e60
[    7.499742][    T1]  __report_bug+0x276/0x570
[    7.499799][    T1]  ? drm_mode_config_validate+0x1c6d/0x1e60
[    7.499828][    T1]  ? __pfx___report_bug+0x10/0x10
[    7.499865][    T1]  ? _raw_spin_unlock_irqrestore+0x30/0x80
[    7.499896][    T1]  ? lockdep_hardirqs_on+0x7a/0x110
[    7.499928][    T1]  ? rt_mutex_slowunlock+0x4ee/0xa20
[    7.499956][    T1]  report_bug_entry+0x19a/0x290
[    7.499985][    T1]  ? drm_mode_config_validate+0x1cae/0x1e60
[    7.500009][    T1]  ? drm_mode_config_validate+0x1cb3/0x1e60
[    7.500034][    T1]  handle_bug+0xce/0x200
[    7.500055][    T1]  exc_invalid_op+0x1a/0x50
[    7.500075][    T1]  asm_exc_invalid_op+0x1a/0x20
[    7.500097][    T1] RIP: 0010:drm_mode_config_validate+0x1cae/0x1e60
[    7.500122][    T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 0a 9d c6 fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 56 35 5a fc 49 bd 00 00 00 00 00 fc ff df
[    7.500139][    T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[    7.500155][    T1] RAX: 1ffff11004c1f008 RBX: dffffc0000000000 RCX: ffff88801cad5d00
[    7.500170][    T1] RDX: ffff888025bf1ea0 RSI: 0000000000000023 RDI: ffffffff8f981c70
[    7.500184][    T1] RBP: 0000000000000023 R08: 0000000000000000 R09: 0000000000000000
[    7.500196][    T1] R10: dffffc0000000000 R11: fffffbfff1f19cd0 R12: dffffc0000000000
[    7.500211][    T1] R13: ffffffff8f981c70 R14: ffff8880260f8040 R15: ffff8880260f8030
[    7.500252][    T1]  ? debugfs_create_file_full+0x3f/0x60
[    7.500278][    T1]  drm_dev_register+0x7f/0xd80
[    7.500307][    T1]  vkms_create+0x40d/0x4f0
[    7.500337][    T1]  ? __pfx_vkms_init+0x10/0x10
[    7.500361][    T1]  vkms_init+0x57/0x80
[    7.500385][    T1]  do_one_initcall+0x250/0x870
[    7.500412][    T1]  ? __pfx_vkms_init+0x10/0x10
[    7.500437][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    7.500468][    T1]  ? lapic_next_event+0x11/0x20
[    7.500498][    T1]  ? clockevents_program_event+0x491/0x630
[    7.500525][    T1]  ? __pfx___schedule+0x10/0x10
[    7.500567][    T1]  ? irqentry_exit+0x218/0x790
[    7.500597][    T1]  ? lockdep_hardirqs_on+0x7a/0x110
[    7.500627][    T1]  ? irqentry_exit+0x218/0x790
[    7.500656][    T1]  ? trace_irq_disable+0x3b/0x140
[    7.500690][    T1]  ? parameq+0xd6/0x170
[    7.500721][    T1]  ? next_arg+0x4a0/0x5e0
[    7.500755][    T1]  ? parameq+0x14d/0x170
[    7.500796][    T1]  ? parse_args+0x9c3/0xad0
[    7.500843][    T1]  ? trace_kmalloc+0x2a/0xf0
[    7.500874][    T1]  ? rcu_is_watching+0x15/0xb0
[    7.500903][    T1]  do_initcall_level+0x10a/0x1a0
[    7.500933][    T1]  ? kernel_init+0x22/0x1d0
[    7.500955][    T1]  do_initcalls+0x59/0xa0
[    7.500985][    T1]  kernel_init_freeable+0x29d/0x3e0
[    7.501015][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.501038][    T1]  kernel_init+0x22/0x1d0
[    7.501059][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.501080][    T1]  ret_from_fork+0x514/0xb70
[    7.501112][    T1]  ? __pfx_ret_from_fork+0x10/0x10
[    7.501139][    T1]  ? __switch_to+0xc89/0x1420
[    7.501166][    T1]  ? __pfx_kernel_init+0x10/0x10
[    7.501189][    T1]  ret_from_fork_asm+0x1a/0x30
[    7.501234][    T1]  </TASK>
[    7.501842][    T1] Kernel Offset: disabled


syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3631483522=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at 303e2802d4
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}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=303e2802d4760a2024848e19b613070c0df2a791 -X github.com/google/syzkaller/prog.gitRevisionDate=20260418-062724"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=303e2802d4760a2024848e19b613070c0df2a791 -X github.com/google/syzkaller/prog.gitRevisionDate=20260418-062724"  ./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=303e2802d4760a2024848e19b613070c0df2a791 -X github.com/google/syzkaller/prog.gitRevisionDate=20260418-062724"  -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -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 -std=c++17 -I. -Iexecutor/_include   -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"303e2802d4760a2024848e19b613070c0df2a791\"
/usr/bin/ld: /tmp/cczXukWt.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=116ceab9580000


Tested on:

commit:         b4515cf4 Add linux-next specific files for 20260722
git tree:       linux-next
kernel config:  https://syzkaller.appspot.com/x/.config?x=166282f41bae1040
dashboard link: https://syzkaller.appspot.com/bug?extid=9013411dc43f3582823a
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15214232580000