* [syzbot] [media?] general protection fault in friio_streaming_ctrl
@ 2026-10-04 9:23 syzbot
2026-10-04 14:39 ` Nguyen Ngoc Thang
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2026-10-04 9:23 UTC (permalink / raw)
To: linux-kernel, linux-media, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: ce1e0223d8ad Merge tag 'devicetree-fixes-for-7.3-2' of git..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=175307f5580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d4242cb1c54cdf7
dashboard link: https://syzkaller.appspot.com/bug?extid=ac020fbb657e00356ca2
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10020ec9580000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ac020fbb657e00356ca2@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000061: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000308-0x000000000000030f]
CPU: 0 UID: 0 PID: 5921 Comm: syz-executor133 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:friio_streaming_ctrl+0x43/0xd0 drivers/media/usb/dvb-usb-v2/gl861.c:521
Code: 93 d9 93 f9 31 ff 89 de e8 8a de 93 f9 85 db b8 ff 00 ff 96 bb 64 ff 00 64 0f 44 d8 49 81 c6 08 03 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 9e dc 03 fa 4d 8b 36 49 83 c6 38
RSP: 0018:ffffc900026e7b20 EFLAGS: 00010202
RAX: 0000000000000061 RBX: 000000006400ff64 RCX: ffff88807f1f3e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900026e7c18 R08: ffffffff907a627f R09: 1ffffffff20f4c4f
R10: dffffc0000000000 R11: ffffffff883434e0 R12: dffffc0000000000
R13: ffff8880558f13b8 R14: 0000000000000308 R15: dffffc0000000000
FS: 00007fc833ad86c0(0000) GS:ffff888124cc7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562c5103b520 CR3: 00000000730d4000 CR4: 00000000003526f0
Call Trace:
<TASK>
dvb_usb_start_feed+0x57a/0xc70 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:308
dmx_section_feed_start_filtering+0x519/0x6b0 drivers/media/dvb-core/dvb_demux.c:977
dvb_dmxdev_filter_start+0xcdb/0x10d0 drivers/media/dvb-core/dmxdev.c:760
dvb_demux_do_ioctl+0x470/0x540 drivers/media/dvb-core/dmxdev.c:1090
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: 0033:0x7fc835311cbb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fc833ad8100 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fc835311cbb
RDX: 00007fc833ad8160 RSI: 00000000403c6f2b RDI: 0000000000000008
RBP: 00007fc833ad81a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc83537d028
R13: 00007fc8353b0120 R14: 00007fc833ad8160 R15: 00007fc8353b0114
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:friio_streaming_ctrl+0x43/0xd0 drivers/media/usb/dvb-usb-v2/gl861.c:521
Code: 93 d9 93 f9 31 ff 89 de e8 8a de 93 f9 85 db b8 ff 00 ff 96 bb 64 ff 00 64 0f 44 d8 49 81 c6 08 03 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 9e dc 03 fa 4d 8b 36 49 83 c6 38
RSP: 0018:ffffc900026e7b20 EFLAGS: 00010202
RAX: 0000000000000061 RBX: 000000006400ff64 RCX: ffff88807f1f3e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900026e7c18 R08: ffffffff907a627f R09: 1ffffffff20f4c4f
R10: dffffc0000000000 R11: ffffffff883434e0 R12: dffffc0000000000
R13: ffff8880558f13b8 R14: 0000000000000308 R15: dffffc0000000000
FS: 00007fc833ad86c0(0000) GS:ffff888124dc7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4798882fb3 CR3: 00000000730d4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 93 xchg %eax,%ebx
1: d9 93 f9 31 ff 89 fsts -0x7600ce07(%rbx)
7: de e8 fsubrp %st,%st(0)
9: 8a de mov %dh,%bl
b: 93 xchg %eax,%ebx
c: f9 stc
d: 85 db test %ebx,%ebx
f: b8 ff 00 ff 96 mov $0x96ff00ff,%eax
14: bb 64 ff 00 64 mov $0x6400ff64,%ebx
19: 0f 44 d8 cmove %eax,%ebx
1c: 49 81 c6 08 03 00 00 add $0x308,%r14
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 9e dc 03 fa call 0xfa03dcd7
39: 4d 8b 36 mov (%r14),%r14
3c: 49 83 c6 38 add $0x38,%r14
---
This report is generated by a bot. It may contain errors.
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^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-10-04 14:40 UTC | newest]
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[not found] <20261004141152.18373-1-kartikey406@gmail.com>
2026-10-04 14:40 ` [syzbot] [media?] general protection fault in friio_streaming_ctrl syzbot
2026-10-04 9:23 syzbot
2026-10-04 14:39 ` Nguyen Ngoc Thang
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