general protection fault in dvb_create_media_graph

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 455e73a07f6e Merge tag 'clk-for-linus' of git://git.kernel..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=129fa2dfb00000
kernel config: https://syzkaller.appspot.com/x/.config?x=465c0933df32e292
dashboard link: https://syzkaller.appspot.com/bug?extid=c1f02bd08905989840fb
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [caihu...@baidu.com linux-...@vger.kernel.org linux...@vger.kernel.org mch...@kernel.org yepei...@gmail.com linu...@vger.kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c1f02b...@syzkaller.appspotmail.com

usb 5-1: media controller created
dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
gp8psk_fe: Frontend attached
usb 5-1: DVB: registering adapter 0 frontend 0 (Genpix DVB-S)...
dvbdev: dvb_create_media_entity: media entity 'Genpix DVB-S' registered.
general protection fault, probably for non-canonical address 0xe37ffbf11022d58a: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x1bffff888116ac50-0x1bffff888116ac57]
CPU: 1 PID: 4412 Comm: kworker/1:2 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:dvb_create_media_graph+0x115/0xbc0 drivers/media/dvb-core/dvbdev.c:628
Code: 3c 20 00 0f 85 d7 09 00 00 48 8b 43 10 48 8d 58 f0 49 39 c6 0f 84 87 00 00 00 e8 36 0f 2d fd 48 8d 7b 2c 48 89 f8 48 c1 e8 03 <42> 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffffc90005696f70 EFLAGS: 00010203
RAX: 037ffff11022d58a RBX: 1bffff888116ac28 RCX: ffffc9000a361000
RDX: 0000000000040000 RSI: ffffffff84167e6a RDI: 1bffff888116ac54
RBP: 0000000000000000 R08: ffffffff86a4b8e0 R09: ffffffff84167ea1
R10: 0000000000000004 R11: 0000000080ffff88 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888116ac3908 R15: 0000000080ffff88
FS: 0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d80901110 CR3: 000000010c0c2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
dvb_usb_adapter_frontend_init+0x3b7/0x5b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:327
dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline]
dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]
dvb_usb_device_init.cold+0xcdd/0x1483 drivers/media/usb/dvb-usb/dvb-usb-init.c:308
gp8psk_usb_probe+0x46/0x70 drivers/media/usb/dvb-usb/gp8psk.c:304
usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x245/0xcc0 drivers/base/dd.c:596
__driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782
__device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899
bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
__device_attach+0x228/0x4a0 drivers/base/dd.c:970
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
device_add+0xc17/0x1ee0 drivers/base/core.c:3409
usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x245/0xcc0 drivers/base/dd.c:596
__driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782
__device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899
bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
__device_attach+0x228/0x4a0 drivers/base/dd.c:970
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
device_add+0xc17/0x1ee0 drivers/base/core.c:3409
usb_new_device.cold+0x63f/0x108e drivers/usb/core/hub.c:2566
hub_port_connect drivers/usb/core/hub.c:5358 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
port_event drivers/usb/core/hub.c:5660 [inline]
hub_event+0x2585/0x44d0 drivers/usb/core/hub.c:5742
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
process_scheduled_works kernel/workqueue.c:2370 [inline]
worker_thread+0x833/0x1110 kernel/workqueue.c:2456
kthread+0x40b/0x500 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Modules linked in:
---[ end trace 89cde2584ae9d86b ]---
RIP: 0010:dvb_create_media_graph+0x115/0xbc0 drivers/media/dvb-core/dvbdev.c:628
Code: 3c 20 00 0f 85 d7 09 00 00 48 8b 43 10 48 8d 58 f0 49 39 c6 0f 84 87 00 00 00 e8 36 0f 2d fd 48 8d 7b 2c 48 89 f8 48 c1 e8 03 <42> 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffffc90005696f70 EFLAGS: 00010203
RAX: 037ffff11022d58a RBX: 1bffff888116ac28 RCX: ffffc9000a361000
RDX: 0000000000040000 RSI: ffffffff84167e6a RDI: 1bffff888116ac54
RBP: 0000000000000000 R08: ffffffff86a4b8e0 R09: ffffffff84167ea1
R10: 0000000000000004 R11: 0000000080ffff88 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888116ac3908 R15: 0000000080ffff88
FS: 0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d80901110 CR3: 000000010c0c2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 3c 20 cmp $0x20,%al
2: 00 0f add %cl,(%rdi)
4: 85 d7 test %edx,%edi
6: 09 00 or %eax,(%rax)
8: 00 48 8b add %cl,-0x75(%rax)
b: 43 10 48 8d rex.XB adc %cl,-0x73(%r8)
f: 58 pop %rax
10: f0 49 39 c6 lock cmp %rax,%r14
14: 0f 84 87 00 00 00 je 0xa1
1a: e8 36 0f 2d fd callq 0xfd2d0f55
1f: 48 8d 7b 2c lea 0x2c(%rbx),%rdi
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 14 20 movzbl (%rax,%r12,1),%edx <-- trapping instruction
2f: 48 89 f8 mov %rdi,%rax
32: 83 e0 07 and $0x7,%eax
35: 83 c0 03 add $0x3,%eax
38: 38 d0 cmp %dl,%al
3a: 7c 08 jl 0x44
3c: 84 d2 test %dl,%dl
3e: 0f .byte 0xf
3f: 85 .byte 0x85


---
This report 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 syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

[Dmitry Vyukov]

#syz upstream

> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-m...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-upstream-moderation/000000000000e02dce05d5e13f28%40google.com.