BUG: unable to handle page fault for address: ffffffffffffffc8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD b68f067 P4D b68f067 PUD b691067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ath9k_htc_rxep+0xb5/0x210 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:1135 Code: 8b 43 38 48 8d 58 c8 49 39 c4 0f 84 ee 00 00 00 e8 d0 e4 6b fc 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 74 06 0f 8e 0a 01 00 00 <44> 0f b6 3b 31 ff 44 89 fe e8 ed ea 6b fc 45 84 ff 75 a8 e8 a3 e4 RSP: 0018:ffffc900000079b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffffffffc8 RCX: ffffc90001cd1000 RDX: 0000000000040000 RSI: ffffffff8509ec90 RDI: ffffc90000007928 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52000000f25 R11: 0000000000000000 R12: ffff88801f6736d8 R13: ffff88801f6732a0 R14: ffff88801f6736e8 R15: ffff88801ecaeca8 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffc8 CR3: 000000001f5e6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ath9k_htc_rx_msg+0x2e4/0xb70 drivers/net/wireless/ath/ath9k/htc_hst.c:461 ath9k_hif_usb_reg_in_cb+0x1ac/0x630 drivers/net/wireless/ath/ath9k/hif_usb.c:733 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726 dummy_timer+0x11f9/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553 Code: 89 de e8 1d 66 43 f8 84 db 75 ac e8 d4 5f 43 f8 e8 df 89 49 f8 eb 0c e8 c8 5f 43 f8 0f 00 2d 81 4c bd 00 e8 bc 5f 43 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 07 65 43 f8 48 85 db RSP: 0018:ffffffff8b607d60 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffffff8b6bc640 RSI: ffffffff893271a4 RDI: ffffffff89327191 RBP: ffff8880163f8064 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817bfba8 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8880163f8000 R14: ffff8880163f8064 R15: ffff888140f9e004 acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:688 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:158 [inline] cpuidle_idle_call kernel/sched/idle.c:239 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:306 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403 start_kernel+0x47a/0x49b init/main.c:1130 secondary_startup_64_no_verify+0xb0/0xbb Modules linked in: CR2: ffffffffffffffc8 ---[ end trace 5e1e73c79fd4c3a8 ]--- RIP: 0010:ath9k_htc_rxep+0xb5/0x210 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:1135 Code: 8b 43 38 48 8d 58 c8 49 39 c4 0f 84 ee 00 00 00 e8 d0 e4 6b fc 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 74 06 0f 8e 0a 01 00 00 <44> 0f b6 3b 31 ff 44 89 fe e8 ed ea 6b fc 45 84 ff 75 a8 e8 a3 e4 RSP: 0018:ffffc900000079b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffffffffc8 RCX: ffffc90001cd1000 RDX: 0000000000040000 RSI: ffffffff8509ec90 RDI: ffffc90000007928 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52000000f25 R11: 0000000000000000 R12: ffff88801f6736d8 R13: ffff88801f6732a0 R14: ffff88801f6736e8 R15: ffff88801ecaeca8 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffc8 CR3: 000000001f5e6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 43 38 mov 0x38(%rbx),%eax 3: 48 8d 58 c8 lea -0x38(%rax),%rbx 7: 49 39 c4 cmp %rax,%r12 a: 0f 84 ee 00 00 00 je 0xfe 10: e8 d0 e4 6b fc callq 0xfc6be4e5 15: 48 89 d8 mov %rbx,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax 20: 84 c0 test %al,%al 22: 74 06 je 0x2a 24: 0f 8e 0a 01 00 00 jle 0x134 2a: 44 0f b6 3b movzbl (%rbx),%r15d <-- trapping instruction 2e: 31 ff xor %edi,%edi 30: 44 89 fe mov %r15d,%esi 33: e8 ed ea 6b fc callq 0xfc6beb25 38: 45 84 ff test %r15b,%r15b 3b: 75 a8 jne 0xffffffe5 3d: e8 .byte 0xe8 3e: a3 .byte 0xa3 3f: e4 .byte 0xe4