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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: 239d, last: 18d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ 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 prio:low 8 C error 327 22h27m 646d 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 438d 438d 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 10 2d16h 177d 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 8 2d17h 177d 0/2 upstream: reported C repro on 2025/12/25 21:19
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/05/28 21:51 16m retest repro linux-5.15.y report log
2026/05/28 21:51 24m retest repro linux-5.15.y report log
2026/04/25 14:21 19m retest repro linux-5.15.y report log
2026/04/25 14:21 20m retest repro linux-5.15.y report log
2026/04/25 14:21 16m retest repro linux-5.15.y report log
2026/04/11 03:39 15m retest repro linux-5.15.y report log
2026/04/11 03:39 10m retest repro linux-5.15.y report log
2026/02/14 14:02 10m retest repro linux-5.15.y report log
2026/01/31 03:11 12m retest repro linux-5.15.y report log
2026/01/31 03:11 12m 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: 1 PID: 4396 Comm: syz.1.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__mutex_lock_common+0x104/0x2400 kernel/locking/mutex.c:575
Code: 04 18 84 c0 0f 85 66 1c 00 00 48 8d bc 24 e0 00 00 00 83 3d 0d 81 68 0c 00 75 30 48 8b 04 24 48 8d 78 60 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 d1 14 f9 f7 48 8b 04 24 48 39 40 60 48 8d bc
RSP: 0018:ffffc90003d27360 EFLAGS: 00010202
RAX: 0000000000000019 RBX: dffffc0000000000 RCX: ffffffff962dbf03
RDX: ffff88805d02d940 RSI: ffffffff8a2b3aa0 RDI: 00000000000000c8
RBP: ffffc90003d274e8 R08: ffffffff8692d582 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100405e52c R12: 0000000000000000
R13: 1ffff920007a4e84 R14: ffffffff8692d582 R15: 0000000000000000
FS:  000055555a8d6500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002480 CR3: 000000005b71b000 CR4: 00000000003506e0
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+0xa6/0x180 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+0x493/0x50d0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x880/0x20b0 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x25d/0x3a0 drivers/i2c/i2c-core-base.c:2330
 i2cdev_ioctl_rdwr+0x3dc/0x6d0 drivers/i2c/i2c-dev.c:297
 i2cdev_ioctl+0x610/0x7b0 drivers/i2c/i2c-dev.c:458
 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: 0033:0x7f943790add9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdec92baf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9437b83fa0 RCX: 00007f943790add9
RDX: 0000200000000080 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007f94379a0d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9437b83fac R14: 00007f9437b83fa0 R15: 00007f9437b83fa0
 </TASK>
Modules linked in:
---[ end trace cefe3e30a5fe79c5 ]---
RIP: 0010:__mutex_lock_common+0x104/0x2400 kernel/locking/mutex.c:575
Code: 04 18 84 c0 0f 85 66 1c 00 00 48 8d bc 24 e0 00 00 00 83 3d 0d 81 68 0c 00 75 30 48 8b 04 24 48 8d 78 60 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 d1 14 f9 f7 48 8b 04 24 48 39 40 60 48 8d bc
RSP: 0018:ffffc90003d27360 EFLAGS: 00010202
RAX: 0000000000000019 RBX: dffffc0000000000 RCX: ffffffff962dbf03
RDX: ffff88805d02d940 RSI: ffffffff8a2b3aa0 RDI: 00000000000000c8
RBP: ffffc90003d274e8 R08: ffffffff8692d582 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100405e52c R12: 0000000000000000
R13: 1ffff920007a4e84 R14: ffffffff8692d582 R15: 0000000000000000
FS:  000055555a8d6500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffea49eb040 CR3: 000000005b71b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	04 18                	add    $0x18,%al
   2:	84 c0                	test   %al,%al
   4:	0f 85 66 1c 00 00    	jne    0x1c70
   a:	48 8d bc 24 e0 00 00 	lea    0xe0(%rsp),%rdi
  11:	00
  12:	83 3d 0d 81 68 0c 00 	cmpl   $0x0,0xc68810d(%rip)        # 0xc688126
  19:	75 30                	jne    0x4b
  1b:	48 8b 04 24          	mov    (%rsp),%rax
  1f:	48 8d 78 60          	lea    0x60(%rax),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 05                	je     0x35
  30:	e8 d1 14 f9 f7       	call   0xf7f91506
  35:	48 8b 04 24          	mov    (%rsp),%rax
  39:	48 39 40 60          	cmp    %rax,0x60(%rax)
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	bc                   	.byte 0xbc

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/03 23:55 linux-5.15.y ef251c45f1cd a0d91488 .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 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
2026/06/03 07:13 linux-5.15.y dc027a595035 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/06/03 07:12 linux-5.15.y dc027a595035 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/05/03 20:51 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/01/17 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.