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general protection fault in dvb_usbv2_generic_write

Status: upstream: reported C repro on 2025/10/25 16:29
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+1a3250c5fcf6074b2dfb@syzkaller.appspotmail.com
First crash: 95d, last: 12d
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2025/10/27 upstream (ToT) fd57572253bc C [report] general protection fault in dvb_usbv2_generic_write
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in dvb_usbv2_generic_write usb media 2 C error 114 1d09h 502d 0/29 upstream: reported C repro on 2024/09/13 13:35
linux-6.1 general protection fault in dvb_usbv2_generic_write 2 1 294d 294d 0/3 auto-obsoleted due to no activity on 2025/07/18 07:04
linux-6.1 general protection fault in dvb_usbv2_generic_write (2) origin:upstream 2 C error 3 34d 34d 0/3 upstream: reported C repro on 2025/12/25 21:19
linux-6.6 general protection fault in dvb_usbv2_generic_write origin:upstream 2 C error 3 34d 34d 0/2 upstream: reported C repro on 2025/12/25 21:19
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/11/24 05:50 10m retest repro linux-5.15.y report log
2025/11/09 12:51 14m retest repro linux-5.15.y report log
2025/11/09 12:51 11m retest repro linux-5.15.y report log
2025/11/09 12:51 10m retest repro linux-5.15.y report log
2025/11/09 12:51 12m retest repro linux-5.15.y report log
2025/11/09 12:51 30m retest repro linux-5.15.y report log

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 PID: 4529 Comm: syz.3.85 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__mutex_lock_common+0x109/0x2390 kernel/locking/mutex.c:575
Code: 8d bc 24 e0 00 00 00 83 3d 03 7c 5a 0c 00 4c 8b 74 24 18 75 32 49 8d 7e 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 bc 6e 0a f8 4d 39 76 60 48 8d bc 24 e0 00 00
RSP: 0018:ffffc90002a9f0c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffffff868114a2 RCX: dffffc0000000000
RDX: ffff888020ca9dc0 RSI: ffffffff8a0b2b40 RDI: 00000000000000c8
RBP: ffffc90002a9f248 R08: ffffffff868114a2 R09: 0000000000000000
R10: ffffed100bb0d02c R11: 1ffff1100bb0d02b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000068 R15: 0000000000000000
FS:  0000555573829500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31663fff CR3: 000000005b35b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 dvb_usbv2_generic_write+0x22/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x12a/0x260 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0x9d/0x180 drivers/media/usb/dvb-usb-v2/mxl111sf.c:123
 mxl111sf_i2c_start drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:130 [inline]
 mxl111sf_i2c_sw_xfer_msg drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:-1 [inline]
 mxl111sf_i2c_xfer+0x45e/0x4ed0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x864/0x2060 drivers/i2c/i2c-core-base.c:-1
 i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:469 [inline]
 __i2c_smbus_xfer+0xfc9/0x1d50 drivers/i2c/i2c-core-smbus.c:607
 i2c_smbus_xfer+0x263/0x3a0 drivers/i2c/i2c-core-smbus.c:545
 i2cdev_ioctl_smbus+0x3e3/0x650 drivers/i2c/i2c-dev.c:381
 i2cdev_ioctl+0x545/0x750 drivers/i2c/i2c-dev.c:467
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa65649cfc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc0daf5c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa6566f3fa0 RCX: 00007fa65649cfc9
RDX: 00002000000001c0 RSI: 0000000000000720 RDI: 0000000000000003
RBP: 00007fa65651ff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa6566f3fa0 R14: 00007fa6566f3fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 4f6d58ae148bff95 ]---
RIP: 0010:__mutex_lock_common+0x109/0x2390 kernel/locking/mutex.c:575
Code: 8d bc 24 e0 00 00 00 83 3d 03 7c 5a 0c 00 4c 8b 74 24 18 75 32 49 8d 7e 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 bc 6e 0a f8 4d 39 76 60 48 8d bc 24 e0 00 00
RSP: 0018:ffffc90002a9f0c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffffff868114a2 RCX: dffffc0000000000
RDX: ffff888020ca9dc0 RSI: ffffffff8a0b2b40 RDI: 00000000000000c8
RBP: ffffc90002a9f248 R08: ffffffff868114a2 R09: 0000000000000000
R10: ffffed100bb0d02c R11: 1ffff1100bb0d02b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000068 R15: 0000000000000000
FS:  0000555573829500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc0daf6000 CR3: 000000005b35b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8d bc 24 e0 00 00 00 	lea    0xe0(%rsp),%edi
   7:	83 3d 03 7c 5a 0c 00 	cmpl   $0x0,0xc5a7c03(%rip)        # 0xc5a7c11
   e:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
  13:	75 32                	jne    0x47
  15:	49 8d 7e 60          	lea    0x60(%r14),%rdi
  19:	48 89 f8             	mov    %rdi,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 05                	je     0x35
  30:	e8 bc 6e 0a f8       	call   0xf80a6ef1
  35:	4d 39 76 60          	cmp    %r14,0x60(%r14)
  39:	48                   	rex.W
  3a:	8d                   	.byte 0x8d
  3b:	bc 24 e0 00 00       	mov    $0xe024,%esp

Crashes (29):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/26 03:02 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/26 01:19 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/25 23:39 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/25 21:40 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/25 19:58 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/25 18:17 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/17 02:11 linux-5.15.y 68efe5a6c16a 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/16 07:36 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/15 07:22 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/14 06:54 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/13 14:36 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/12 20:22 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/10 13:52 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/10 12:26 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/09 17:10 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/08 10:46 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/07 04:40 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/06 14:35 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/05 01:17 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/04 21:51 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/31 06:58 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/30 10:06 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/29 17:29 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/27 21:32 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/27 08:15 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/26 21:21 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/26 11:01 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/12/25 21:20 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2025/10/25 16:29 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
* Struck through repros no longer work on HEAD.