BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 800000005dc18067 P4D 800000005dc18067 PUD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5835 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline] RIP: 0010:kcov_remote_start+0x2a1/0x710 kernel/kcov.c:930 Code: 8f 8d 4c 8b b8 c8 c2 75 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 e0 8c 02 8e 4d 8b 3f 49 81 ff e0 8c 02 8e 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 91 8b f4 02 84 c0 74 0e 49 8b 07 49 RSP: 0018:ffffc90005c17828 EFLAGS: 00010203 RAX: 0000000000000000 RBX: ffff88802960be00 RCX: 0000000000000000 RDX: 000000009f0c3d00 RSI: 0000000000000001 RDI: ffffffff8baa2920 RBP: 0000000000100000 R08: ffffffff8b325a20 R09: ffffffff8dfcac60 R10: dffffc0000000000 R11: fffffbfff1f1a07f R12: 0000000000000002 R13: 0000000000000001 R14: ffff88802976ec00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125ecd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 0000000056514000 CR4: 00000000003526f0 Call Trace: kcov_remote_start_usb include/linux/kcov.h:53 [inline] hub_event+0x150/0x4f60 drivers/usb/core/hub.c:5889 process_one_work+0x98b/0x1630 kernel/workqueue.c:3318 process_scheduled_works kernel/workqueue.c:3401 [inline] worker_thread+0xb49/0x1140 kernel/workqueue.c:3482 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: CR2: 0000000000000010 ---[ end trace 0000000000000000 ]--- RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline] RIP: 0010:kcov_remote_start+0x2a1/0x710 kernel/kcov.c:930 Code: 8f 8d 4c 8b b8 c8 c2 75 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 e0 8c 02 8e 4d 8b 3f 49 81 ff e0 8c 02 8e 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 91 8b f4 02 84 c0 74 0e 49 8b 07 49 RSP: 0018:ffffc90005c17828 EFLAGS: 00010203 RAX: 0000000000000000 RBX: ffff88802960be00 RCX: 0000000000000000 RDX: 000000009f0c3d00 RSI: 0000000000000001 RDI: ffffffff8baa2920 RBP: 0000000000100000 R08: ffffffff8b325a20 R09: ffffffff8dfcac60 R10: dffffc0000000000 R11: fffffbfff1f1a07f R12: 0000000000000002 R13: 0000000000000001 R14: ffff88802976ec00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125ecd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 0000000056514000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 8d 4c 8b b8 lea -0x48(%rbx,%rcx,4),%ecx 4: c8 c2 75 92 enter $0x75c2,$0x92 8: bd 00 00 04 00 mov $0x40000,%ebp d: eb 4f jmp 0x5e f: 41 8b ae a4 00 00 00 mov 0xa4(%r14),%ebp 16: 49 c7 c7 e0 8c 02 8e mov $0xffffffff8e028ce0,%r15 1d: 4d 8b 3f mov (%r15),%r15 20: 49 81 ff e0 8c 02 8e cmp $0xffffffff8e028ce0,%r15 27: 74 4c je 0x75 * 29: 41 39 6f 10 cmp %ebp,0x10(%r15) <-- trapping instruction 2d: 75 ee jne 0x1d 2f: 4c 89 ff mov %r15,%rdi 32: e8 91 8b f4 02 call 0x2f48bc8 37: 84 c0 test %al,%al 39: 74 0e je 0x49 3b: 49 8b 07 mov (%r15),%rax 3e: 49 rex.WB