From: syzbot <syzbot+2eb3d983669d3e49d4fa@syzkaller.appspotmail.com>
To: axboe@kernel.dk, io-uring@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [io-uring?] [ext4?] INFO: task hung in io_write
Date: Tue, 08 Sep 2026 18:58:04 -0700 [thread overview]
Message-ID: <6aa0bd2c.6e6c5f9e.28f11f.001d.GAE@google.com> (raw)
In-Reply-To: <b191cba9-d863-4bfc-8729-be60cf66f1d7@kernel.dk>
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
TD (C) 2007 Red Hat, Inc.
[ 9.051564][ T1] QNX4 filesystem 0.2.3 registered.
[ 9.065214][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 9.075912][ T1] fuse: init (API version 7.45)
[ 9.091183][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 9.106914][ T1] orangefs_init: module version upstream loaded
[ 9.113002][ T1] JFS: nTxBlock = 6145, nTxLock = 49167
[ 9.142915][ T1] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, no debug enabled
[ 9.170468][ T1] 9p: Installing v9fs 9p2000 file system support
[ 9.185644][ T1] NILFS version 2 loaded
[ 9.188849][ T1] befs: version: 0.9.3
[ 9.193115][ T1] ocfs2: Registered cluster interface o2cb
[ 9.206206][ T1] ocfs2: Registered cluster interface user
[ 9.216419][ T1] OCFS2 User DLM kernel interface loaded
[ 9.265973][ T1] gfs2: GFS2 installed
[ 9.298657][ T1] ceph: loaded (mds proto 32)
[ 9.320185][ T1] NET: Registered PF_ALG protocol family
[ 9.324663][ T1] async_tx: api initialized (async)
[ 9.345185][ T1] Key type asymmetric registered
[ 9.349130][ T1] Asymmetric key parser 'x509' registered
[ 9.353465][ T1] Asymmetric key parser 'pkcs8' registered
[ 9.365187][ T1] Key type pkcs7_test registered
[ 9.376596][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 9.396528][ T1] io scheduler mq-deadline registered
[ 9.400698][ T1] io scheduler kyber registered
[ 9.415450][ T1] io scheduler bfq registered
[ 9.420059][ T1] raid6: skipped pq benchmark and selected avx512x4
[ 9.442033][ T127] kworker/u4:1 (127) used greatest stack depth: 26984 bytes left
[ 9.524259][ T1] ACPI: \_SB_.GSIE: Enabled at IRQ 20
[ 9.565511][ T1] pcieport 0000:00:04.0: PME: Signaling with IRQ 25
[ 9.578930][ T1] pcieport 0000:00:04.0: AER: enabled with IRQ 26
[ 9.601450][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 9.629341][ T1] ACPI: button: Power Button [PWRF]
[ 10.450014][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 10.532357][ T1] ACPI: \_SB_.GSIF: Enabled at IRQ 21
[ 10.629521][ T1] ACPI: \_SB_.GSIH: Enabled at IRQ 23
[ 10.892841][ T270] kworker/u4:1 (270) used greatest stack depth: 26960 bytes left
[ 11.809081][ T1] N_HDLC line discipline registered with maxframe=4096
[ 11.830246][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 11.849727][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 11.999300][ T1] Non-volatile memory driver v1.3
[ 12.037071][ T1] usbcore: registered new interface driver xillyusb
[ 12.058150][ T1] ACPI: bus type drm_connector registered
[ 12.091068][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 12.105742][ T1] usbcore: registered new interface driver udl
[ 12.112516][ T1] [drm] pci: virtio-vga detected at 0000:00:01.0
[ 12.125337][ T1] virtio-pci 0000:00:01.0: vgaarb: deactivate vga console
[ 12.186303][ T1] Console: switching to colour dummy device 80x25
[ 12.194466][ T1] [drm] features: -virgl +edid -resource_blob -host_visible
[ 12.194482][ T1] [drm] features: -context_init -blob_alignment
[ 12.230560][ T1] [drm] number of scanouts: 1
[ 12.233893][ T1] [drm] number of cap sets: 0
[ 12.255974][ T1] ------------[ cut here ]------------
[ 12.260092][ T1] [PLANE:36:plane-1] pixel format with alpha exposed but blend mode not setup
[ 12.260107][ T1] WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6a/0x1e60, CPU#0: swapper/0/1
[ 12.275683][ T1] Modules linked in:
[ 12.279250][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 12.285867][ T1] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 12.293265][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 12.298167][ 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 7d a5 a3 fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 89 54 32 fc 49 bd 00 00 00 00 00 fc ff df
[ 12.312441][ T1] RSP: 0000:ffffc900001af450 EFLAGS: 00010246
[ 12.316951][ T1] RAX: 1ffff11000030e08 RBX: dffffc0000000000 RCX: ffff88801ceb0000
[ 12.322637][ T1] RDX: ffff88801f5b27a0 RSI: 0000000000000024 RDI: ffffffff9085b000
[ 12.328653][ T1] RBP: 0000000000000024 R08: ffffffff8ec2b347 R09: 1ffffffff1d85668
[ 12.334503][ T1] R10: dffffc0000000000 R11: fffffbfff1d85669 R12: dffffc0000000000
[ 12.340419][ T1] R13: ffffffff9085b000 R14: ffff888000187040 R15: ffff888000187030
[ 12.346250][ T1] FS: 0000000000000000(0000) GS:ffff88808c2e6000(0000) knlGS:0000000000000000
[ 12.352727][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 12.357998][ T1] CR2: ffff88801af19000 CR3: 000000000eb46000 CR4: 0000000000352ef0
[ 12.363905][ T1] Call Trace:
[ 12.366455][ T1] <TASK>
[ 12.368581][ T1] ? __pfx_autoremove_wake_function+0x10/0x10
[ 12.372972][ T1] drm_dev_register+0x7c/0xd80
[ 12.376503][ T1] virtio_gpu_probe+0x1cb/0x290
[ 12.380071][ T1] virtio_dev_probe+0xdf6/0x10c0
[ 12.383655][ T1] ? up_write+0x19d/0x4a0
[ 12.386865][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.390829][ T1] ? driver_sysfs_add+0x1fe/0x210
[ 12.394687][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.398721][ T1] really_probe+0x254/0xae0
[ 12.402015][ T1] __driver_probe_device+0x1e8/0x360
[ 12.406009][ T1] driver_probe_device+0x4f/0x240
[ 12.413118][ T1] __driver_attach+0x339/0x600
[ 12.416808][ T1] bus_for_each_dev+0x23b/0x2c0
[ 12.420389][ T1] ? __pfx___driver_attach+0x10/0x10
[ 12.424449][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 12.428383][ T1] ? do_raw_spin_unlock+0x4d/0x200
[ 12.431965][ T1] bus_add_driver+0x345/0x670
[ 12.435503][ T1] driver_register+0x23a/0x320
[ 12.438896][ T1] ? __pfx_virtio_gpu_driver_init+0x10/0x10
[ 12.443320][ T1] virtio_gpu_driver_init+0x96/0x110
[ 12.447202][ T1] do_one_initcall+0x250/0x870
[ 12.450824][ T1] ? __pfx_virtio_gpu_driver_init+0x10/0x10
[ 12.455195][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 12.459086][ T1] ? __pfx___schedule+0x10/0x10
[ 12.462702][ T1] ? __pfx___schedule+0x10/0x10
[ 12.466316][ T1] ? _raw_spin_unlock_irqrestore+0x30/0x80
[ 12.470553][ T1] ? __pfx___schedule+0x10/0x10
[ 12.474166][ T1] ? irqentry_exit+0x218/0x910
[ 12.477695][ T1] ? lockdep_hardirqs_on+0x7b/0x110
[ 12.481598][ T1] ? irqentry_exit+0x218/0x910
[ 12.485220][ T1] ? trace_irq_disable+0x3b/0x140
[ 12.488882][ T1] ? parameq+0xd6/0x170
[ 12.492000][ T1] ? next_arg+0x4a0/0x5e0
[ 12.495249][ T1] ? parameq+0x14d/0x170
[ 12.498246][ T1] ? parse_args+0x9c3/0xad0
[ 12.501454][ T1] ? rcu_is_watching+0x16/0xb0
[ 12.505007][ T1] do_initcall_level+0x10a/0x1a0
[ 12.508580][ T1] ? kernel_init+0x22/0x1d0
[ 12.511816][ T1] do_initcalls+0x59/0xa0
[ 12.515060][ T1] kernel_init_freeable+0x29d/0x3e0
[ 12.518828][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.522466][ T1] kernel_init+0x22/0x1d0
[ 12.525706][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.529224][ T1] ret_from_fork+0x514/0xb70
[ 12.532504][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 12.536233][ T1] ? __switch_to+0xc89/0x1420
[ 12.539759][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.543298][ T1] ret_from_fork_asm+0x1a/0x30
[ 12.546840][ T1] </TASK>
[ 12.549044][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 12.554149][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 12.556740][ T1] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 12.556740][ T1] Call Trace:
[ 12.556740][ T1] <TASK>
[ 12.556740][ T1] vpanic+0x56d/0xa60
[ 12.556740][ T1] ? __pfx__printk+0x10/0x10
[ 12.556740][ T1] ? __pfx_vpanic+0x10/0x10
[ 12.556740][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 12.556740][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 12.556740][ T1] panic+0xc5/0xd0
[ 12.556740][ T1] ? __pfx_panic+0x10/0x10
[ 12.556740][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 12.556740][ T1] __warn+0x315/0x4c0
[ 12.556740][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 12.556740][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 12.556740][ T1] __report_bug+0x276/0x570
[ 12.556740][ T1] ? blocking_notifier_chain_register+0x50/0xc0
[ 12.556740][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 12.556740][ T1] ? __pfx___report_bug+0x10/0x10
[ 12.556740][ T1] ? blocking_notifier_chain_register+0x6b/0xc0
[ 12.556740][ T1] report_bug_entry+0x19b/0x290
[ 12.556740][ T1] ? drm_mode_config_validate+0x1cab/0x1e60
[ 12.556740][ T1] ? drm_mode_config_validate+0x1cb0/0x1e60
[ 12.556740][ T1] handle_bug+0xce/0x200
[ 12.556740][ T1] exc_invalid_op+0x1a/0x50
[ 12.556740][ T1] asm_exc_invalid_op+0x1a/0x20
[ 12.556740][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 12.556740][ 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 7d a5 a3 fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 89 54 32 fc 49 bd 00 00 00 00 00 fc ff df
[ 12.556740][ T1] RSP: 0000:ffffc900001af450 EFLAGS: 00010246
[ 12.556740][ T1] RAX: 1ffff11000030e08 RBX: dffffc0000000000 RCX: ffff88801ceb0000
[ 12.556740][ T1] RDX: ffff88801f5b27a0 RSI: 0000000000000024 RDI: ffffffff9085b000
[ 12.556740][ T1] RBP: 0000000000000024 R08: ffffffff8ec2b347 R09: 1ffffffff1d85668
[ 12.556740][ T1] R10: dffffc0000000000 R11: fffffbfff1d85669 R12: dffffc0000000000
[ 12.556740][ T1] R13: ffffffff9085b000 R14: ffff888000187040 R15: ffff888000187030
[ 12.556740][ T1] ? __pfx_autoremove_wake_function+0x10/0x10
[ 12.556740][ T1] drm_dev_register+0x7c/0xd80
[ 12.556740][ T1] virtio_gpu_probe+0x1cb/0x290
[ 12.556740][ T1] virtio_dev_probe+0xdf6/0x10c0
[ 12.556740][ T1] ? up_write+0x19d/0x4a0
[ 12.556740][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.556740][ T1] ? driver_sysfs_add+0x1fe/0x210
[ 12.556740][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 12.556740][ T1] really_probe+0x254/0xae0
[ 12.556740][ T1] __driver_probe_device+0x1e8/0x360
[ 12.556740][ T1] driver_probe_device+0x4f/0x240
[ 12.556740][ T1] __driver_attach+0x339/0x600
[ 12.556740][ T1] bus_for_each_dev+0x23b/0x2c0
[ 12.556740][ T1] ? __pfx___driver_attach+0x10/0x10
[ 12.556740][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 12.556740][ T1] ? do_raw_spin_unlock+0x4d/0x200
[ 12.556740][ T1] bus_add_driver+0x345/0x670
[ 12.556740][ T1] driver_register+0x23a/0x320
[ 12.556740][ T1] ? __pfx_virtio_gpu_driver_init+0x10/0x10
[ 12.556740][ T1] virtio_gpu_driver_init+0x96/0x110
[ 12.556740][ T1] do_one_initcall+0x250/0x870
[ 12.556740][ T1] ? __pfx_virtio_gpu_driver_init+0x10/0x10
[ 12.556740][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 12.556740][ T1] ? __pfx___schedule+0x10/0x10
[ 12.556740][ T1] ? __pfx___schedule+0x10/0x10
[ 12.556740][ T1] ? _raw_spin_unlock_irqrestore+0x30/0x80
[ 12.556740][ T1] ? __pfx___schedule+0x10/0x10
[ 12.556740][ T1] ? irqentry_exit+0x218/0x910
[ 12.556740][ T1] ? lockdep_hardirqs_on+0x7b/0x110
[ 12.556740][ T1] ? irqentry_exit+0x218/0x910
[ 12.556740][ T1] ? trace_irq_disable+0x3b/0x140
[ 12.556740][ T1] ? parameq+0xd6/0x170
[ 12.556740][ T1] ? next_arg+0x4a0/0x5e0
[ 12.556740][ T1] ? parameq+0x14d/0x170
[ 12.556740][ T1] ? parse_args+0x9c3/0xad0
[ 12.556740][ T1] ? rcu_is_watching+0x16/0xb0
[ 12.556740][ T1] do_initcall_level+0x10a/0x1a0
[ 12.556740][ T1] ? kernel_init+0x22/0x1d0
[ 12.556740][ T1] do_initcalls+0x59/0xa0
[ 12.556740][ T1] kernel_init_freeable+0x29d/0x3e0
[ 12.556740][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.556740][ T1] kernel_init+0x22/0x1d0
[ 12.556740][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.556740][ T1] ret_from_fork+0x514/0xb70
[ 12.556740][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 12.556740][ T1] ? __switch_to+0xc89/0x1420
[ 12.556740][ T1] ? __pfx_kernel_init+0x10/0x10
[ 12.556740][ T1] ret_from_fork_asm+0x1a/0x30
[ 12.556740][ T1] </TASK>
[ 12.556740][ T1] Kernel Offset: disabled
[ 12.556740][ T1] Rebooting in 86400 seconds..
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-build1726682488=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/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 680aa3e19b5
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=680aa3e19b52574eca8bcba3c41aa18235367abe -X github.com/google/syzkaller/prog.gitRevisionDate=20260907-094615" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=680aa3e19b52574eca8bcba3c41aa18235367abe -X github.com/google/syzkaller/prog.gitRevisionDate=20260907-094615" ./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=680aa3e19b52574eca8bcba3c41aa18235367abe -X github.com/google/syzkaller/prog.gitRevisionDate=20260907-094615" -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=\"680aa3e19b52574eca8bcba3c41aa18235367abe\"
/usr/bin/ld: /tmp/ccLyACCI.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=16bcf125580000
Tested on:
commit: 796aa054 io_uring/rw: end write accounting from ->ki_c..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git io_uring-7.3
kernel config: https://syzkaller.appspot.com/x/.config?x=780bb9a5c10069a1
dashboard link: https://syzkaller.appspot.com/bug?extid=2eb3d983669d3e49d4fa
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Note: no patches were applied.
next prev parent reply other threads:[~2026-09-09 1:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-08 22:08 [syzbot] [io-uring?] [ext4?] INFO: task hung in io_write syzbot
2026-09-09 1:10 ` Jens Axboe
2026-09-09 1:15 ` Jens Axboe
2026-09-09 1:58 ` syzbot [this message]
2026-09-09 1:35 ` syzbot
2026-09-09 11:02 ` Jens Axboe
2026-09-09 11:27 ` syzbot
2026-09-09 11:46 ` Jens Axboe
2026-09-09 12:13 ` syzbot
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--in-reply-to=6aa0bd2c.6e6c5f9e.28f11f.001d.GAE@google.com \
--to=syzbot+2eb3d983669d3e49d4fa@syzkaller.appspotmail.com \
--cc=axboe@kernel.dk \
--cc=io-uring@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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