BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8000000011058067 P4D 8000000011058067 PUD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 36 Comm: kworker/1:1 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+0x287/0x6f0 kernel/kcov.c:920 Code: 8d 8d 4c 8b b8 b8 a2 6d 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 00 ee 01 8e 4d 8b 3f 49 81 ff 00 ee 01 8e 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 9b f2 ea 02 84 c0 74 0e 49 8b 07 49 RSP: 0018:ffffc90000ab77e8 EFLAGS: 00010207 RAX: 0000000000000000 RBX: ffff88801dec9f00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8ba7d5c0 RBP: 0000000000100000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f12e9f R12: 0000000000000002 R13: 0000000000000001 R14: ffff888020a93d00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88812624f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 000000005e26a000 CR4: 00000000003526f0 Call Trace: kcov_remote_start_usb include/linux/kcov.h:55 [inline] hub_event+0x15d/0x4cf0 drivers/usb/core/hub.c:5889 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 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+0x287/0x6f0 kernel/kcov.c:920 Code: 8d 8d 4c 8b b8 b8 a2 6d 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 00 ee 01 8e 4d 8b 3f 49 81 ff 00 ee 01 8e 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 9b f2 ea 02 84 c0 74 0e 49 8b 07 49 RSP: 0018:ffffc90000ab77e8 EFLAGS: 00010207 RAX: 0000000000000000 RBX: ffff88801dec9f00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8ba7d5c0 RBP: 0000000000100000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f12e9f R12: 0000000000000002 R13: 0000000000000001 R14: ffff888020a93d00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88812624f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 000000005e26a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 8d 8d 4c 8b b8 b8 lea -0x474774b4(%rbp),%ecx 6: a2 6d 92 bd 00 00 04 movabs %al,0xeb00040000bd926d d: 00 eb f: 4f rex.WRXB 10: 41 8b ae a4 00 00 00 mov 0xa4(%r14),%ebp 17: 49 c7 c7 00 ee 01 8e mov $0xffffffff8e01ee00,%r15 1e: 4d 8b 3f mov (%r15),%r15 21: 49 81 ff 00 ee 01 8e cmp $0xffffffff8e01ee00,%r15 28: 74 4c je 0x76 * 2a: 41 39 6f 10 cmp %ebp,0x10(%r15) <-- trapping instruction 2e: 75 ee jne 0x1e 30: 4c 89 ff mov %r15,%rdi 33: e8 9b f2 ea 02 call 0x2eaf2d3 38: 84 c0 test %al,%al 3a: 74 0e je 0x4a 3c: 49 8b 07 mov (%r15),%rax 3f: 49 rex.WB