general protection fault in mxl111sf_ep6_streaming

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
5f617a01	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ✅ VMHostTrigger: ❌	❓	general protection fault in mxl111sf_ep6_streaming_ctrl	2026/09/27 00:36	2026/09/27 00:36	2026/09/27 01:31	a3c7249d

Title	Replies (including bot)	Last reply
[PATCH] media: dvb-usb-v2: set active_fe before the demux goes live	1 (1)	2026/09/27 04:45
[syzbot] [media?] [usb?] general protection fault in mxl111sf_ep6_streaming_ctrl	0 (1)	2026/09/26 22:23

Title

Replies (including bot)

Last reply

[PATCH] media: dvb-usb-v2: set active_fe before the demux goes live

1 (1)

2026/09/27 04:45

[syzbot] [media?] [usb?] general protection fault in mxl111sf_ep6_streaming_ctrl

0 (1)

2026/09/26 22:23

Created	Duration	User	Patch	Repo	Result
2026/09/27 00:14		bisect		upstream	running

Created

Duration

User

Patch

Repo

Result

2026/09/27 00:14

bisect

upstream

running

usb 1-1: dvb_usb_v2: could not submit urb no. 0 - get them all back Oops: general protection fault, probably for non-canonical address 0xdffffc0000000061: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000308-0x000000000000030f] CPU: 0 UID: 0 PID: 5651 Comm: syz-executor908 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026 RIP: 0010:mxl111sf_ep6_streaming_ctrl+0x2e/0x2e0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:348 Code: 55 41 57 41 56 41 54 53 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 10 62 93 f9 49 8d 9e 08 03 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 53 66 03 fa 48 8b 1b 48 83 c3 38 RSP: 0018:ffffc900036b7b30 EFLAGS: 00010212 RAX: 0000000000000061 RBX: 0000000000000308 RCX: ffff88807faf0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffc900036b7647 R09: 1ffff920006d6ec8 R10: dffffc0000000000 R11: ffffffff883479d0 R12: dffffc0000000000 R13: ffff8880798113b8 R14: 0000000000000000 R15: ffff8880798108d8 FS: 000055558749c400(0000) GS:ffff888124cca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbf685aaa20 CR3: 0000000020716000 CR4: 0000000000350ef0 Call Trace: <TASK> dvb_usb_start_feed+0x57a/0xc70 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:308 dmx_ts_feed_start_filtering+0x129/0x220 drivers/media/dvb-core/dvb_demux.c:747 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:658 [inline] dvb_dmxdev_filter_start+0x434/0x10d0 drivers/media/dvb-core/dmxdev.c:769 dvb_demux_do_ioctl+0x48b/0x540 drivers/media/dvb-core/dmxdev.c:1099 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbf6855bcf9 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0240de98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbf6855bcf9 RDX: 0000200000000100 RSI: 0000000040146f2c RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000140fe R13: 00007fff0240deac R14: 00007fff0240dec0 R15: 00007fff0240deb0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mxl111sf_ep6_streaming_ctrl+0x2e/0x2e0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:348 Code: 55 41 57 41 56 41 54 53 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 10 62 93 f9 49 8d 9e 08 03 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 53 66 03 fa 48 8b 1b 48 83 c3 38 RSP: 0018:ffffc900036b7b30 EFLAGS: 00010212 RAX: 0000000000000061 RBX: 0000000000000308 RCX: ffff88807faf0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffc900036b7647 R09: 1ffff920006d6ec8 R10: dffffc0000000000 R11: ffffffff883479d0 R12: dffffc0000000000 R13: ffff8880798113b8 R14: 0000000000000000 R15: ffff8880798108d8 FS: 000055558749c400(0000) GS:ffff888124dca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff0240ce50 CR3: 0000000020716000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 41 57 push %r15 3: 41 56 push %r14 5: 41 54 push %r12 7: 53 push %rbx 8: 89 f5 mov %esi,%ebp a: 49 89 fe mov %rdi,%r14 d: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 14: fc ff df 17: e8 10 62 93 f9 call 0xf993622c 1c: 49 8d 9e 08 03 00 00 lea 0x308(%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 53 66 03 fa call 0xfa03668c 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 83 c3 38 add $0x38,%rbx

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/09/26 21:09	upstream	6812ce4e4379	a3c7249d	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-root	general protection fault in mxl111sf_ep6_streaming_ctrl
2026/09/26 14:00	upstream	6812ce4e4379	a3c7249d	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-root	general protection fault in mxl111sf_ep6_streaming_ctrl

Crashes (2):

Assets (help?)