Oops: general protection fault, probably for non-canonical address 0xdffffc0000002000: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000000010000-0x0000000000010007] CPU: 0 UID: 0 PID: 7373 Comm: syz.1.426 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:dvb_device_open+0xd8/0x350 drivers/media/dvb-core/dvbdev.c:103 Code: 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 5c 09 5f fa 4d 8b 2c 24 4d 85 ed 0f 84 45 01 00 00 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 3a 09 5f fa 49 8b 7d 00 e8 11 47 e0 RSP: 0018:ffffc90003157790 EFLAGS: 00010206 RAX: 0000000000002000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffff88807b5001c0 R08: ffffffff8f49c8cf R09: 1ffffffff1e93919 R10: dffffc0000000000 R11: fffffbfff1e9391a R12: ffff88802954d618 R13: 0000000000010001 R14: ffff88802a08a850 R15: ffff88802954d600 FS: 00007f2440bdc6c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f243fd840c0 CR3: 0000000031712000 CR4: 00000000003526f0 Call Trace: chrdev_open+0x4cd/0x5e0 fs/char_dev.c:414 do_dentry_open+0x7ce/0x1420 fs/open.c:962 vfs_open+0x3b/0x340 fs/open.c:1094 do_open fs/namei.c:4637 [inline] path_openat+0x3486/0x3e20 fs/namei.c:4796 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f243fd5b78e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007f2440bdbb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f2440bdc6c0 RCX: 00007f243fd5b78e RDX: 0000000000040002 RSI: 00007f2440bdbc00 RDI: ffffffffffffff9c RBP: 00007f2440bdbc00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007f2440016038 R14: 00007f2440015fa0 R15: 00007f244013fa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dvb_device_open+0xd8/0x350 drivers/media/dvb-core/dvbdev.c:103 Code: 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 5c 09 5f fa 4d 8b 2c 24 4d 85 ed 0f 84 45 01 00 00 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 3a 09 5f fa 49 8b 7d 00 e8 11 47 e0 RSP: 0018:ffffc90003157790 EFLAGS: 00010206 RAX: 0000000000002000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffff88807b5001c0 R08: ffffffff8f49c8cf R09: 1ffffffff1e93919 R10: dffffc0000000000 R11: fffffbfff1e9391a R12: ffff88802954d618 R13: 0000000000010001 R14: ffff88802a08a850 R15: ffff88802954d600 FS: 00007f2440bdc6c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f243fd840c0 CR3: 0000000031712000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 18 4c 89 e0 sbb %cl,-0x20(%rcx,%rcx,4) 4: 48 c1 e8 03 shr $0x3,%rax 8: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) c: 74 08 je 0x16 e: 4c 89 e7 mov %r12,%rdi 11: e8 5c 09 5f fa call 0xfa5f0972 16: 4d 8b 2c 24 mov (%r12),%r13 1a: 4d 85 ed test %r13,%r13 1d: 0f 84 45 01 00 00 je 0x168 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ef mov %r13,%rdi 33: e8 3a 09 5f fa call 0xfa5f0972 38: 49 8b 7d 00 mov 0x0(%r13),%rdi 3c: e8 .byte 0xe8 3d: 11 47 e0 adc %eax,-0x20(%rdi)