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: 332d, last: 22h31m
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 prio:low usb media 8 syz, C error 406 11h34m 739d 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 532d 532d 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 syz, C error 19 10h48m 271d 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 syz, C error 10 21h20m 271d 0/2 upstream: reported C repro on 2025/12/25 21:19
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/30 21:58 17m retest repro linux-5.15.y report job log log
2026/08/30 21:58 12m retest repro linux-5.15.y report job log log
2026/08/03 12:15 15m retest repro linux-5.15.y report log
2026/08/03 12:15 15m retest repro linux-5.15.y report log
2026/08/03 12:15 37m retest repro linux-5.15.y report log
2026/08/03 12:15 16m retest repro linux-5.15.y report log
2026/08/03 12:15 18m retest repro linux-5.15.y report log
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

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: 4382 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common+0x10c/0x2400 kernel/locking/mutex.c:575
Code: 03 42 0f b6 04 28 84 c0 0f 85 50 1c 00 00 4c 8d b4 24 e0 00 00 00 83 3d 81 d2 65 0c 00 75 29 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 48 9b f4 f7 48 39 5b 60 4c 8d b4 24 e0 00
RSP: 0018:ffffc900035b7380 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: ffffffff962f7f03
RDX: ffff88807ec7d940 RSI: ffffffff8a2b3e80 RDI: 00000000000000c8
RBP: ffffc900035b7508 R08: ffffffff8696cbf2 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100fd8c72c R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc900035b7460 R15: 0000000000000000
FS:  0000555578d0a500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32763fff CR3: 0000000058769000 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+0x460/0x5030 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x88d/0x2090 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x25d/0x3a0 drivers/i2c/i2c-core-base.c:2363
 i2cdev_ioctl_rdwr+0x3dc/0x6c0 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: 0033:0x7ffbcca3a159
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:00007ffc505ea7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffbcccc1fa0 RCX: 00007ffbcca3a159
RDX: 0000200000000080 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007ffbccad106b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffbcccc1fac R14: 00007ffbcccc1fa0 R15: 00007ffbcccc1fa0
 </TASK>
Modules linked in:
---[ end trace c0254f177bc143c8 ]---
RIP: 0010:__mutex_lock_common+0x10c/0x2400 kernel/locking/mutex.c:575
Code: 03 42 0f b6 04 28 84 c0 0f 85 50 1c 00 00 4c 8d b4 24 e0 00 00 00 83 3d 81 d2 65 0c 00 75 29 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 48 9b f4 f7 48 39 5b 60 4c 8d b4 24 e0 00
RSP: 0018:ffffc900035b7380 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: ffffffff962f7f03
RDX: ffff88807ec7d940 RSI: ffffffff8a2b3e80 RDI: 00000000000000c8
RBP: ffffc900035b7508 R08: ffffffff8696cbf2 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100fd8c72c R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc900035b7460 R15: 0000000000000000
FS:  0000555578d0a500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32763fff CR3: 0000000058769000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 42 0f             	add    0xf(%rdx),%eax
   3:	b6 04                	mov    $0x4,%dh
   5:	28 84 c0 0f 85 50 1c 	sub    %al,0x1c50850f(%rax,%rax,8)
   c:	00 00                	add    %al,(%rax)
   e:	4c 8d b4 24 e0 00 00 	lea    0xe0(%rsp),%r14
  15:	00
  16:	83 3d 81 d2 65 0c 00 	cmpl   $0x0,0xc65d281(%rip)        # 0xc65d29e
  1d:	75 29                	jne    0x48
  1f:	48 8d 7b 60          	lea    0x60(%rbx),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 48 9b f4 f7       	call   0xf7f49b7e
  36:	48 39 5b 60          	cmp    %rbx,0x60(%rbx)
  3a:	4c                   	rex.WR
  3b:	8d                   	.byte 0x8d
  3c:	b4 24                	mov    $0x24,%ah
  3e:	e0 00                	loopne 0x40

Crashes (37):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/19 10:04 linux-5.15.y 0248c33e835e 853b104b .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
2026/05/03 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
2026/09/22 14:02 linux-5.15.y 0248c33e835e e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/09/19 08:50 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in dvb_usbv2_generic_write
2026/08/09 02:14 linux-5.15.y aabd761612db 5d63f80b .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 07:13 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.