LKML Archive on lore.kernel.org
 help / color / Atom feed
* WARNING in sisusb_send_bulk_msg/usb_submit_urb
@ 2019-07-02 15:27 syzbot
  2019-07-04 14:09 ` syzbot
       [not found] ` <20190705095012.13096-1-hdanton@sina.com>
  0 siblings, 2 replies; 3+ messages in thread
From: syzbot @ 2019-07-02 15:27 UTC (permalink / raw)
  To: andreyknvl, gregkh, gustavo, linux-kernel, linux-usb, syzkaller-bugs

Hello,

syzbot found the following crash on:

HEAD commit:    7829a896 usb-fuzzer: main usb gadget fuzzer driver
git tree:       https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=13a4cb55a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f6d4561982f71f63
dashboard link: https://syzkaller.appspot.com/bug?extid=23be03b56c5259385d79
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=123963d9a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+23be03b56c5259385d79@syzkaller.appspotmail.com

usb 6-1: USB2VGA dongle found at address 2
usb 6-1: Allocated 8 output buffers
------------[ cut here ]------------
usb 6-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 0 PID: 12 at drivers/usb/core/urb.c:477  
usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc6+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0xca/0x13e lib/dump_stack.c:113
  panic+0x292/0x6c9 kernel/panic.c:219
  __warn.cold+0x20/0x4b kernel/panic.c:576
  report_bug+0x262/0x2a0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:179 [inline]
  fixup_bug arch/x86/kernel/traps.c:174 [inline]
  do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
  do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
  invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Code: 4d 85 ed 74 2c e8 78 db e8 fd 4c 89 f7 e8 a0 36 13 ff 41 89 d8 44 89  
e1 4c 89 ea 48 89 c6 48 c7 c7 80 23 1a 86 e8 03 a0 be fd <0f> 0b e9 20 f4  
ff ff e8 4c db e8 fd 4c 89 f2 48 b8 00 00 00 00 00
RSP: 0018:ffff8881d9e0ed28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3c1d97
RBP: ffff8881d0662f00 R08: ffff8881d9df9800 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003
R13: ffff8881d3c5ebe8 R14: ffff8881c70d11a0 R15: ffff8881d0670700
  sisusb_bulkout_msg drivers/usb/misc/sisusbvga/sisusb.c:238 [inline]
  sisusb_send_bulk_msg.constprop.0+0x88a/0x1030  
drivers/usb/misc/sisusbvga/sisusb.c:393
  sisusb_send_bridge_packet.constprop.0+0x11c/0x240  
drivers/usb/misc/sisusbvga/sisusb.c:581
  sisusb_do_init_gfxdevice+0x8a/0x450  
drivers/usb/misc/sisusbvga/sisusb.c:2137
  sisusb_init_gfxdevice+0xe0/0x18d0 drivers/usb/misc/sisusbvga/sisusb.c:2237
  sisusb_probe+0x924/0xbcb drivers/usb/misc/sisusbvga/sisusb.c:3122
  usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
  really_probe+0x281/0x660 drivers/base/dd.c:509
  driver_probe_device+0x104/0x210 drivers/base/dd.c:670
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
  bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:843
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2111
  usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
  generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
  usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
  really_probe+0x281/0x660 drivers/base/dd.c:509
  driver_probe_device+0x104/0x210 drivers/base/dd.c:670
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
  bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:843
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2111
  usb_new_device.cold+0x8c1/0x1016 drivers/usb/core/hub.c:2534
  hub_port_connect drivers/usb/core/hub.c:5089 [inline]
  hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
  port_event drivers/usb/core/hub.c:5350 [inline]
  hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432
  process_one_work+0x905/0x1570 kernel/workqueue.c:2269
  worker_thread+0x96/0xe20 kernel/workqueue.c:2415
  kthread+0x30b/0x410 kernel/kthread.c:255
  ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: WARNING in sisusb_send_bulk_msg/usb_submit_urb
  2019-07-02 15:27 WARNING in sisusb_send_bulk_msg/usb_submit_urb syzbot
@ 2019-07-04 14:09 ` syzbot
       [not found] ` <20190705095012.13096-1-hdanton@sina.com>
  1 sibling, 0 replies; 3+ messages in thread
From: syzbot @ 2019-07-04 14:09 UTC (permalink / raw)
  To: andreyknvl, gregkh, gustavo, linux-kernel, linux-usb, syzkaller-bugs

syzbot has found a reproducer for the following crash on:

HEAD commit:    7829a896 usb-fuzzer: main usb gadget fuzzer driver
git tree:       https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=12e5bf93a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f6d4561982f71f63
dashboard link: https://syzkaller.appspot.com/bug?extid=23be03b56c5259385d79
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11effc85a00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=172189aba00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+23be03b56c5259385d79@syzkaller.appspotmail.com

usb 1-1: string descriptor 0 read error: -22
usb 1-1: New USB device found, idVendor=0711, idProduct=0550,  
bcdDevice=da.7e
usb 1-1: New USB device strings: Mfr=37, Product=1, SerialNumber=1
usb 1-1: USB2VGA dongle found at address 2
usb 1-1: Allocated 8 output buffers
------------[ cut here ]------------
usb 1-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 1 PID: 21 at drivers/usb/core/urb.c:477  
usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0xca/0x13e lib/dump_stack.c:113
  panic+0x292/0x6c9 kernel/panic.c:219
  __warn.cold+0x20/0x4b kernel/panic.c:576
  report_bug+0x262/0x2a0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:179 [inline]
  fixup_bug arch/x86/kernel/traps.c:174 [inline]
  do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
  do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
  invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Code: 4d 85 ed 74 2c e8 78 db e8 fd 4c 89 f7 e8 a0 36 13 ff 41 89 d8 44 89  
e1 4c 89 ea 48 89 c6 48 c7 c7 80 23 1a 86 e8 03 a0 be fd <0f> 0b e9 20 f4  
ff ff e8 4c db e8 fd 4c 89 f2 48 b8 00 00 00 00 00
RSP: 0018:ffff8881d9efed28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3dfd97
RBP: ffff8881d09bbb80 R08: ffff8881d9e36000 R09: ffffed103b665d30
R10: ffffed103b665d2f R11: ffff8881db32e97f R12: 0000000000000003
R13: ffff8881ccdd79a8 R14: ffff8881d03711a0 R15: ffff8881d9449000
  sisusb_bulkout_msg drivers/usb/misc/sisusbvga/sisusb.c:238 [inline]
  sisusb_send_bulk_msg.constprop.0+0x88a/0x1030  
drivers/usb/misc/sisusbvga/sisusb.c:393
  sisusb_send_bridge_packet.constprop.0+0x11c/0x240  
drivers/usb/misc/sisusbvga/sisusb.c:581
  sisusb_do_init_gfxdevice+0x8a/0x450  
drivers/usb/misc/sisusbvga/sisusb.c:2137
  sisusb_init_gfxdevice+0xe0/0x18d0 drivers/usb/misc/sisusbvga/sisusb.c:2237
  sisusb_probe+0x924/0xbcb drivers/usb/misc/sisusbvga/sisusb.c:3122
  usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
  really_probe+0x281/0x660 drivers/base/dd.c:509
  driver_probe_device+0x104/0x210 drivers/base/dd.c:670
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
  bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:843
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2111
  usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
  generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
  usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
  really_probe+0x281/0x660 drivers/base/dd.c:509
  driver_probe_device+0x104/0x210 drivers/base/dd.c:670
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
  bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:843
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2111
  usb_new_device.cold+0x8c1/0x1016 drivers/usb/core/hub.c:2534
  hub_port_connect drivers/usb/core/hub.c:5089 [inline]
  hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
  port_event drivers/usb/core/hub.c:5350 [inline]
  hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432
  process_one_work+0x905/0x1570 kernel/workqueue.c:2269
  worker_thread+0x96/0xe20 kernel/workqueue.c:2415
  kthread+0x30b/0x410 kernel/kthread.c:255
  ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: WARNING in sisusb_send_bulk_msg/usb_submit_urb
       [not found] ` <20190705095012.13096-1-hdanton@sina.com>
@ 2019-07-09 12:16   ` Andrey Konovalov
  0 siblings, 0 replies; 3+ messages in thread
From: Andrey Konovalov @ 2019-07-09 12:16 UTC (permalink / raw)
  To: Hillf Danton
  Cc: syzbot, Greg Kroah-Hartman, Gustavo A. R. Silva, LKML, USB list,
	syzkaller-bugs

On Fri, Jul 5, 2019 at 11:50 AM Hillf Danton <hdanton@sina.com> wrote:
>
>
> On Thu, 04 Jul 2019 07:09:05 -0700 (PDT)
> > syzbot has found a reproducer for the following crash on:
> >
> > HEAD commit:    7829a896 usb-fuzzer: main usb gadget fuzzer driver
> > git tree:       https://github.com/google/kasan.git usb-fuzzer
> > console output: https://syzkaller.appspot.com/x/log.txt?x=12e5bf93a00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=f6d4561982f71f63
> > dashboard link: https://syzkaller.appspot.com/bug?extid=23be03b56c5259385d79
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11effc85a00000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=172189aba00000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+23be03b56c5259385d79@syzkaller.appspotmail.com
> >
> > usb 1-1: string descriptor 0 read error: -22
> > usb 1-1: New USB device found, idVendor=0711, idProduct=0550,
> > bcdDevice=da.7e
> > usb 1-1: New USB device strings: Mfr=37, Product=1, SerialNumber=1
> > usb 1-1: USB2VGA dongle found at address 2
> > usb 1-1: Allocated 8 output buffers
> > ------------[ cut here ]------------
> > usb 1-1: BOGUS urb xfer, pipe 3 != type 1
> > WARNING: CPU: 1 PID: 21 at drivers/usb/core/urb.c:477
> > usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
> > Kernel panic - not syncing: panic_on_warn set ...
> > CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > Workqueue: usb_hub_wq hub_event
> > Call Trace:
> >   __dump_stack lib/dump_stack.c:77 [inline]
> >   dump_stack+0xca/0x13e lib/dump_stack.c:113
> >   panic+0x292/0x6c9 kernel/panic.c:219
> >   __warn.cold+0x20/0x4b kernel/panic.c:576
> >   report_bug+0x262/0x2a0 lib/bug.c:186
> >   fixup_bug arch/x86/kernel/traps.c:179 [inline]
> >   fixup_bug arch/x86/kernel/traps.c:174 [inline]
> >   do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
> >   do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
> >   invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
> > RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
> > Code: 4d 85 ed 74 2c e8 78 db e8 fd 4c 89 f7 e8 a0 36 13 ff 41 89 d8 44 89
> > e1 4c 89 ea 48 89 c6 48 c7 c7 80 23 1a 86 e8 03 a0 be fd <0f> 0b e9 20 f4
> > ff ff e8 4c db e8 fd 4c 89 f2 48 b8 00 00 00 00 00
> > RSP: 0018:ffff8881d9efed28 EFLAGS: 00010282
> > RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3dfd97
> > RBP: ffff8881d09bbb80 R08: ffff8881d9e36000 R09: ffffed103b665d30
> > R10: ffffed103b665d2f R11: ffff8881db32e97f R12: 0000000000000003
> > R13: ffff8881ccdd79a8 R14: ffff8881d03711a0 R15: ffff8881d9449000
> >   sisusb_bulkout_msg drivers/usb/misc/sisusbvga/sisusb.c:238 [inline]
> >   sisusb_send_bulk_msg.constprop.0+0x88a/0x1030  drivers/usb/misc/sisusbvga/sisusb.c:393
> >   sisusb_send_bridge_packet.constprop.0+0x11c/0x240  drivers/usb/misc/sisusbvga/sisusb.c:581
> >   sisusb_do_init_gfxdevice+0x8a/0x450  drivers/usb/misc/sisusbvga/sisusb.c:2137
> >   sisusb_init_gfxdevice+0xe0/0x18d0 drivers/usb/misc/sisusbvga/sisusb.c:2237
> >   sisusb_probe+0x924/0xbcb drivers/usb/misc/sisusbvga/sisusb.c:3122
> >   usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
> >   really_probe+0x281/0x660 drivers/base/dd.c:509
> >   driver_probe_device+0x104/0x210 drivers/base/dd.c:670
> >   __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
> >   bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
> >   __device_attach+0x217/0x360 drivers/base/dd.c:843
> >   bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
> >   device_add+0xae6/0x16f0 drivers/base/core.c:2111
> >   usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
> >   generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
> >   usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
> >   really_probe+0x281/0x660 drivers/base/dd.c:509
> >   driver_probe_device+0x104/0x210 drivers/base/dd.c:670
> >   __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
> >   bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
> >   __device_attach+0x217/0x360 drivers/base/dd.c:843
> >   bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
> >   device_add+0xae6/0x16f0 drivers/base/core.c:2111
> >   usb_new_device.cold+0x8c1/0x1016 drivers/usb/core/hub.c:2534
> >   hub_port_connect drivers/usb/core/hub.c:5089 [inline]
> >   hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
> >   port_event drivers/usb/core/hub.c:5350 [inline]
> >   hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432
> >   process_one_work+0x905/0x1570 kernel/workqueue.c:2269
> >   worker_thread+0x96/0xe20 kernel/workqueue.c:2415
> >   kthread+0x30b/0x410 kernel/kthread.c:255
> >   ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
> > Kernel Offset: disabled
> > Rebooting in 86400 seconds..
> >
>
> There are three defines that can be found currently in the mainline.
>
> ===define-1=== linux/usb.h
>
> /* NOTE:  these are not the standard USB_ENDPOINT_XFER_* values!! */
> /* (yet ... they're the values used by usbfs) */
> #define PIPE_ISOCHRONOUS                0
> #define PIPE_INTERRUPT                  1
> #define PIPE_CONTROL                    2
> #define PIPE_BULK                       3
>
>
> ===define-2=== usb/core/urb.c
>
> static const int pipetypes[4] = {
>         PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
> };
>
>
> ===define-3=== uapi/linux/usb/ch9.h
>
> #define USB_ENDPOINT_XFERTYPE_MASK      0x03    /* in bmAttributes */
> #define USB_ENDPOINT_XFER_CONTROL       0
> #define USB_ENDPOINT_XFER_ISOC          1
> #define USB_ENDPOINT_XFER_BULK          2
> #define USB_ENDPOINT_XFER_INT           3
>
> And PIPE_BULK is unable to match its counterpart in pipetypes array as long as
> code is correct. Nor XFER_BULK.
>

Hi Hilf,

The USB stack produces this kind of WARNING when the driver uses a
bulk pipe and usb_fill_bulk_urb(), but the endpoint is actually
interrupt. The driver should check that the ep has the expected type
before using it.

Thanks!

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, back to index

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-02 15:27 WARNING in sisusb_send_bulk_msg/usb_submit_urb syzbot
2019-07-04 14:09 ` syzbot
     [not found] ` <20190705095012.13096-1-hdanton@sina.com>
2019-07-09 12:16   ` Andrey Konovalov

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git