From: syzbot <syzbot+f8e9a371388aa62ecab4@syzkaller.appspotmail.com>
To: asml.silence@gmail.com, axboe@kernel.dk,
io-uring@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [io-uring?] KMSAN: uninit-value in io_sendrecv_fail
Date: Sat, 16 Mar 2024 00:41:02 -0700 [thread overview]
Message-ID: <0000000000000568df0613c23f45@google.com> (raw)
In-Reply-To: <b090c928-6c42-4735-9758-e8a137832607@kernel.dk>
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
w interface driver emi26 - firmware loader
[ 4.930123][ T1] usbcore: registered new interface driver emi62 - firmware loader
[ 4.933583][ T1] usbcore: registered new interface driver idmouse
[ 4.936138][ T1] usbcore: registered new interface driver iowarrior
[ 4.938260][ T1] usbcore: registered new interface driver isight_firmware
[ 4.941539][ T1] usbcore: registered new interface driver usblcd
[ 4.944208][ T1] usbcore: registered new interface driver ldusb
[ 4.946236][ T1] usbcore: registered new interface driver legousbtower
[ 4.948760][ T1] usbcore: registered new interface driver usbtest
[ 4.951336][ T1] usbcore: registered new interface driver usb_ehset_test
[ 4.953754][ T1] usbcore: registered new interface driver trancevibrator
[ 4.956657][ T1] usbcore: registered new interface driver uss720
[ 4.958553][ T1] uss720: USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip
[ 4.961696][ T1] uss720: NOTE: this is a special purpose driver to allow nonstandard
[ 4.965815][ T1] uss720: protocols (eg. bitbang) over USS720 usb to parallel cables
[ 4.968828][ T1] uss720: If you just want to connect to a printer, use usblp instead
[ 4.971404][ T1] usbcore: registered new interface driver usbsevseg
[ 4.973400][ T1] usbcore: registered new interface driver yurex
[ 4.975425][ T1] usbcore: registered new interface driver chaoskey
[ 4.977627][ T1] usbcore: registered new interface driver sisusb
[ 4.979915][ T1] usbcore: registered new interface driver lvs
[ 4.981851][ T1] usbcore: registered new interface driver cxacru
[ 4.983985][ T1] usbcore: registered new interface driver speedtch
[ 4.985950][ T1] usbcore: registered new interface driver ueagle-atm
[ 4.988079][ T1] xusbatm: malformed module parameters
[ 4.990267][ T1] dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005
[ 4.992631][ T1] dummy_hcd dummy_hcd.0: Dummy host controller
[ 4.994246][ T1] dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 1
[ 4.996646][ T1] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 4.999972][ T1] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.002339][ T1] usb usb1: Product: Dummy host controller
[ 5.004170][ T1] usb usb1: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.006694][ T1] usb usb1: SerialNumber: dummy_hcd.0
[ 5.008294][ T1] hub 1-0:1.0: USB hub found
[ 5.009512][ T1] hub 1-0:1.0: 1 port detected
[ 5.011319][ T1] dummy_hcd dummy_hcd.1: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.013887][ T1] dummy_hcd dummy_hcd.1: Dummy host controller
[ 5.016176][ T1] dummy_hcd dummy_hcd.1: new USB bus registered, assigned bus number 2
[ 5.018574][ T1] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.020979][ T1] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.022687][ T1] usb usb2: Product: Dummy host controller
[ 5.024450][ T1] usb usb2: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.027608][ T1] usb usb2: SerialNumber: dummy_hcd.1
[ 5.029702][ T1] hub 2-0:1.0: USB hub found
[ 5.031266][ T1] hub 2-0:1.0: 1 port detected
[ 5.032936][ T1] dummy_hcd dummy_hcd.2: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.035475][ T1] dummy_hcd dummy_hcd.2: Dummy host controller
[ 5.037713][ T1] dummy_hcd dummy_hcd.2: new USB bus registered, assigned bus number 3
[ 5.040503][ T1] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.043261][ T1] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.045104][ T1] usb usb3: Product: Dummy host controller
[ 5.046289][ T1] usb usb3: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.048827][ T1] usb usb3: SerialNumber: dummy_hcd.2
[ 5.050576][ T1] hub 3-0:1.0: USB hub found
[ 5.051876][ T1] hub 3-0:1.0: 1 port detected
[ 5.053553][ T1] dummy_hcd dummy_hcd.3: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.055781][ T1] dummy_hcd dummy_hcd.3: Dummy host controller
[ 5.057706][ T1] dummy_hcd dummy_hcd.3: new USB bus registered, assigned bus number 4
[ 5.060296][ T1] usb usb4: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.062797][ T1] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.064685][ T1] usb usb4: Product: Dummy host controller
[ 5.066160][ T1] usb usb4: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.068499][ T1] usb usb4: SerialNumber: dummy_hcd.3
[ 5.070209][ T1] hub 4-0:1.0: USB hub found
[ 5.071787][ T1] hub 4-0:1.0: 1 port detected
[ 5.073440][ T1] dummy_hcd dummy_hcd.4: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.075182][ T1] dummy_hcd dummy_hcd.4: Dummy host controller
[ 5.076592][ T1] dummy_hcd dummy_hcd.4: new USB bus registered, assigned bus number 5
[ 5.078624][ T1] usb usb5: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.080862][ T1] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.083013][ T1] usb usb5: Product: Dummy host controller
[ 5.084611][ T1] usb usb5: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.087050][ T1] usb usb5: SerialNumber: dummy_hcd.4
[ 5.088518][ T1] hub 5-0:1.0: USB hub found
[ 5.089972][ T1] hub 5-0:1.0: 1 port detected
[ 5.091603][ T1] dummy_hcd dummy_hcd.5: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.094464][ T1] dummy_hcd dummy_hcd.5: Dummy host controller
[ 5.096179][ T1] dummy_hcd dummy_hcd.5: new USB bus registered, assigned bus number 6
[ 5.098245][ T1] usb usb6: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.100696][ T1] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.102751][ T1] usb usb6: Product: Dummy host controller
[ 5.104243][ T1] usb usb6: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.106248][ T1] usb usb6: SerialNumber: dummy_hcd.5
[ 5.107854][ T1] hub 6-0:1.0: USB hub found
[ 5.109089][ T1] hub 6-0:1.0: 1 port detected
[ 5.110733][ T1] dummy_hcd dummy_hcd.6: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.112657][ T1] dummy_hcd dummy_hcd.6: Dummy host controller
[ 5.113957][ T1] dummy_hcd dummy_hcd.6: new USB bus registered, assigned bus number 7
[ 5.115878][ T1] usb usb7: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.117770][ T1] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.119911][ T1] usb usb7: Product: Dummy host controller
[ 5.121564][ T1] usb usb7: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.123794][ T1] usb usb7: SerialNumber: dummy_hcd.6
[ 5.125643][ T1] hub 7-0:1.0: USB hub found
[ 5.128371][ T1] hub 7-0:1.0: 1 port detected
[ 5.130464][ T1] dummy_hcd dummy_hcd.7: USB Host+Gadget Emulator, driver 02 May 2005
[ 5.132874][ T1] dummy_hcd dummy_hcd.7: Dummy host controller
[ 5.134563][ T1] dummy_hcd dummy_hcd.7: new USB bus registered, assigned bus number 8
[ 5.136921][ T1] usb usb8: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.00
[ 5.139796][ T1] usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.142568][ T1] usb usb8: Product: Dummy host controller
[ 5.144170][ T1] usb usb8: Manufacturer: Linux 6.0.0-rc1-syzkaller-00033-gd59bd748db0a dummy_hcd
[ 5.146630][ T1] usb usb8: SerialNumber: dummy_hcd.7
[ 5.148441][ T1] hub 8-0:1.0: USB hub found
[ 5.150215][ T1] hub 8-0:1.0: 1 port detected
[ 5.153433][ T1] general protection fault, probably for non-canonical address 0xffff000000000800: 0000 [#1] PREEMPT SMP
[ 5.157506][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc1-syzkaller-00033-gd59bd748db0a #0
[ 5.159433][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[ 5.160818][ T1] RIP: 0010:kmem_cache_alloc_trace+0x6a/0x1e0
[ 5.161856][ T1] Code: 48 85 c0 74 7e 49 89 c7 49 8b 07 65 48 03 05 4d 31 af 7e 48 8b 50 08 48 8b 38 48 85 ff 74 7d 48 83 78 10 00 74 76 41 8b 47 28 <48> 8b 1c 07 48 8d 4a 08 4d 8b 07 48 89 f8 65 49 0f c7 08 0f 94 c0
[ 5.162052][ T1] RSP: 0000:ffff8881001af8a0 EFLAGS: 00010286
[ 5.162052][ T1] RAX: 0000000000000800 RBX: 0000000000000000 RCX: 0000000000000000
[ 5.162052][ T1] RDX: 0000000000009e48 RSI: 0000000000000dc0 RDI: ffff000000000000
[ 5.162052][ T1] RBP: ffff8881001af8e0 R08: 0000000000000dc0 R09: ffffffff82992c5d
[ 5.162052][ T1] R10: 0000000000000004 R11: ffff8881001e8000 R12: ffff888100041d00
[ 5.162052][ T1] R13: ffffffff823e1d01 R14: 0000000000000dc0 R15: ffff888100041d00
[ 5.162052][ T1] FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[ 5.162052][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.162052][ T1] CR2: ffff88823ffff000 CR3: 0000000005c29000 CR4: 00000000003506f0
[ 5.162052][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5.162052][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5.162052][ T1] Call Trace:
[ 5.162052][ T1] <TASK>
[ 5.162052][ T1] kobject_uevent_env+0x151/0x4c0
[ 5.162052][ T1] ? device_links_driver_bound+0x596/0x5b0
[ 5.162052][ T1] kobject_uevent+0x23/0x30
[ 5.162052][ T1] driver_bound+0x1da/0x200
[ 5.162052][ T1] ? platform_uevent+0x90/0x90
[ 5.162052][ T1] really_probe+0x424/0x4c0
[ 5.162052][ T1] ? __driver_probe_device+0xeb/0x140
[ 5.162052][ T1] __driver_probe_device+0xf6/0x140
[ 5.162052][ T1] driver_probe_device+0x31/0x210
[ 5.162052][ T1] __device_attach_driver+0x1e1/0x250
[ 5.162052][ T1] ? coredump_store+0x50/0x50
[ 5.162052][ T1] bus_for_each_drv+0xae/0x100
[ 5.162052][ T1] __device_attach+0x13d/0x220
[ 5.162052][ T1] device_initial_probe+0x1e/0x30
[ 5.162052][ T1] bus_probe_device+0x62/0xf0
[ 5.162052][ T1] device_add+0x655/0x7b0
[ 5.162052][ T1] platform_device_add+0x22f/0x330
[ 5.162052][ T1] dummy_hcd_init+0x4ce/0x6dc
[ 5.162052][ T1] ? configfs_register_subsystem+0x228/0x240
[ 5.162052][ T1] ? usb_udc_init+0x9d/0x9d
[ 5.162052][ T1] do_one_initcall+0xa8/0x390
[ 5.162052][ T1] ? skip_spaces+0x2c/0x40
[ 5.162052][ T1] ? next_arg+0x266/0x280
[ 5.162052][ T1] ? parse_args+0x577/0x5b0
[ 5.162052][ T1] do_initcall_level+0x94/0x171
[ 5.162052][ T1] do_initcalls+0x4e/0x89
[ 5.162052][ T1] do_basic_setup+0x1d/0x1f
[ 5.200701][ T1] kernel_init_freeable+0x113/0x189
[ 5.200701][ T1] ? rest_init+0xd0/0xd0
[ 5.200701][ T1] kernel_init+0x1f/0x2a0
[ 5.200701][ T1] ? rest_init+0xd0/0xd0
[ 5.200701][ T1] ret_from_fork+0x1f/0x30
[ 5.200701][ T1] </TASK>
[ 5.200701][ T1] Modules linked in:
[ 5.210897][ C0] vkms_vblank_simulate: vblank timer overrun
[ 5.212396][ T1] ---[ end trace 0000000000000000 ]---
[ 5.213702][ T1] RIP: 0010:kmem_cache_alloc_trace+0x6a/0x1e0
[ 5.215084][ T1] Code: 48 85 c0 74 7e 49 89 c7 49 8b 07 65 48 03 05 4d 31 af 7e 48 8b 50 08 48 8b 38 48 85 ff 74 7d 48 83 78 10 00 74 76 41 8b 47 28 <48> 8b 1c 07 48 8d 4a 08 4d 8b 07 48 89 f8 65 49 0f c7 08 0f 94 c0
[ 5.220767][ T1] RSP: 0000:ffff8881001af8a0 EFLAGS: 00010286
[ 5.222164][ T1] RAX: 0000000000000800 RBX: 0000000000000000 RCX: 0000000000000000
[ 5.224220][ T1] RDX: 0000000000009e48 RSI: 0000000000000dc0 RDI: ffff000000000000
[ 5.226644][ T1] RBP: ffff8881001af8e0 R08: 0000000000000dc0 R09: ffffffff82992c5d
[ 5.229009][ T1] R10: 0000000000000004 R11: ffff8881001e8000 R12: ffff888100041d00
[ 5.231225][ T1] R13: ffffffff823e1d01 R14: 0000000000000dc0 R15: ffff888100041d00
[ 5.233220][ T1] FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[ 5.235486][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.237106][ T1] CR2: ffff88823ffff000 CR3: 0000000005c29000 CR4: 00000000003506f0
[ 5.238923][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5.240518][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5.242066][ T1] Kernel panic - not syncing: Fatal exception
[ 5.244082][ T1] Kernel Offset: disabled
[ 5.245268][ 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-build3912001592=/tmp/go-build -gno-record-gcc-switches'
git status (err=<nil>)
HEAD detached at 6ee49f2e6
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=6ee49f2e61b06b3d64c676dd2232a5ac362902a6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240308-214706'" "-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=6ee49f2e61b06b3d64c676dd2232a5ac362902a6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240308-214706'" "-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=6ee49f2e61b06b3d64c676dd2232a5ac362902a6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240308-214706'" "-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=\"6ee49f2e61b06b3d64c676dd2232a5ac362902a6\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=146d8aa5180000
Tested on:
commit: d59bd748 io_uring/poll: disable level triggered poll
git tree: git://git.kernel.dk/linux.git io_uring-6.0
kernel config: https://syzkaller.appspot.com/x/.config?x=7646c61aacfb37b5
dashboard link: https://syzkaller.appspot.com/bug?extid=f8e9a371388aa62ecab4
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
next prev parent reply other threads:[~2024-03-16 7:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-15 22:28 [syzbot] [io-uring?] KMSAN: uninit-value in io_sendrecv_fail syzbot
2024-03-15 22:38 ` Jens Axboe
2024-03-16 7:41 ` syzbot [this message]
2024-03-16 13:13 ` Jens Axboe
2024-03-16 13:37 ` syzbot
2024-03-16 14:42 ` Jens Axboe
2024-03-16 15:20 ` syzbot
2024-03-16 15:28 ` Pavel Begunkov
2024-03-16 15:46 ` Jens Axboe
2024-03-16 16:01 ` Jens Axboe
2024-03-16 16:29 ` syzbot
2024-03-16 16:36 ` Jens Axboe
2024-03-16 17:18 ` syzbot
2024-03-16 3:48 ` Edward Adam Davis
2024-03-16 10:26 ` syzbot
2024-03-16 12:42 ` [PATCH] io_uring: fix " Edward Adam Davis
2024-03-16 13:11 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0000000000000568df0613c23f45@google.com \
--to=syzbot+f8e9a371388aa62ecab4@syzkaller.appspotmail.com \
--cc=asml.silence@gmail.com \
--cc=axboe@kernel.dk \
--cc=io-uring@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
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.