BUG: unable to handle page fault for address: ffffffffffffffff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD fb4b067 P4D fb4b067 PUD fb4d067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 23990 Comm: syz.7.6960 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:dvb_device_open+0xe6/0x340 drivers/media/dvb-core/dvbdev.c:103 Code: 4c 89 e7 e8 8c a3 1e fa 4d 8b 2c 24 4d 85 ed 0f 84 ea 00 00 00 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 6a a3 1e fa <49> 8b 7d 00 e8 91 c8 96 f9 84 c0 0f 84 cb 00 00 00 48 89 2c 24 49 RSP: 0000:ffffc90003f6f8f0 EFLAGS: 00010246 RAX: 1fffffffffffffff RBX: dffffc0000000000 RCX: ffffffff9b9f5501 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffff888079c2e380 R08: ffffffff90d48f0f R09: 1ffffffff21a91e1 R10: dffffc0000000000 R11: fffffbfff21a91e2 R12: ffff88802d6f8a18 R13: ffffffffffffffff R14: ffff88802d6eb188 R15: ffff88802d6f8a00 FS: 0000000000000000(0000) GS:ffff888123bbf000(0063) knlGS:00000000f53f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 00000000549c2000 CR4: 00000000003526f0 Call Trace: chrdev_open+0x4d9/0x600 fs/char_dev.c:411 do_dentry_open+0x816/0x1380 fs/open.c:996 vfs_open+0x3b/0x340 fs/open.c:1101 do_open fs/namei.c:4836 [inline] path_openat+0x16bf/0x2090 fs/namei.c:4999 do_file_open+0x23e/0x4a0 fs/namei.c:5028 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_compat_sys_openat fs/open.c:1485 [inline] __se_compat_sys_openat fs/open.c:1483 [inline] __ia32_compat_sys_openat+0x131/0x160 fs/open.c:1483 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] do_int80_emulation+0x198/0x500 arch/x86/entry/syscall_32.c:166 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:598 RIP: 0023:0xf71377eb Code: 57 56 53 8b 44 24 14 f6 00 08 75 23 8b 44 24 18 8b 5c 24 1c 8b 4c 24 20 8b 54 24 24 8b 74 24 28 8b 7c 24 2c 8b 6c 24 30 cd 80 <5b> 5e 5f 5d c3 5b 5e 5f 5d e9 f7 a1 ff ff 66 90 66 90 66 90 90 53 RSP: 002b:00000000f53f603c EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f53f6100 RDX: 0000000000040002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffffffffffffffff ---[ end trace 0000000000000000 ]--- RIP: 0010:dvb_device_open+0xe6/0x340 drivers/media/dvb-core/dvbdev.c:103 Code: 4c 89 e7 e8 8c a3 1e fa 4d 8b 2c 24 4d 85 ed 0f 84 ea 00 00 00 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 6a a3 1e fa <49> 8b 7d 00 e8 91 c8 96 f9 84 c0 0f 84 cb 00 00 00 48 89 2c 24 49 RSP: 0000:ffffc90003f6f8f0 EFLAGS: 00010246 RAX: 1fffffffffffffff RBX: dffffc0000000000 RCX: ffffffff9b9f5501 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffff888079c2e380 R08: ffffffff90d48f0f R09: 1ffffffff21a91e1 R10: dffffc0000000000 R11: fffffbfff21a91e2 R12: ffff88802d6f8a18 R13: ffffffffffffffff R14: ffff88802d6eb188 R15: ffff88802d6f8a00 FS: 0000000000000000(0000) GS:ffff888123bbf000(0063) knlGS:00000000f53f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 00000000549c2000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 4c 89 e7 mov %r12,%rdi 3: e8 8c a3 1e fa call 0xfa1ea394 8: 4d 8b 2c 24 mov (%r12),%r13 c: 4d 85 ed test %r13,%r13 f: 0f 84 ea 00 00 00 je 0xff 15: 4c 89 e8 mov %r13,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 20: 74 08 je 0x2a 22: 4c 89 ef mov %r13,%rdi 25: e8 6a a3 1e fa call 0xfa1ea394 * 2a: 49 8b 7d 00 mov 0x0(%r13),%rdi <-- trapping instruction 2e: e8 91 c8 96 f9 call 0xf996c8c4 33: 84 c0 test %al,%al 35: 0f 84 cb 00 00 00 je 0x106 3b: 48 89 2c 24 mov %rbp,(%rsp) 3f: 49 rex.WB