================================================================== BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:642 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0xea7/0x10d0 drivers/net/wireless/ath/ath9k/hif_usb.c:686 Read of size 4 at addr ffff88807c3942e8 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:642 [inline] ath9k_hif_usb_rx_cb+0xea7/0x10d0 drivers/net/wireless/ath/ath9k/hif_usb.c:686 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1670 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1747 dummy_timer+0x11f9/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 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:130 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline] RIP: 0010:acpi_idle_do_entry+0x1c9/0x240 drivers/acpi/processor_idle.c:555 Code: 89 de e8 9a d3 ff f7 84 db 75 98 e8 91 d7 ff f7 e8 fc 26 06 f8 66 90 e8 85 d7 ff f7 0f 00 2d fe 24 b9 00 e8 79 d7 ff f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 c4 d3 ff f7 48 85 db RSP: 0018:ffffc90000177d20 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888011b09d80 RSI: ffffffff897b0247 RDI: 0000000000000000 RBP: ffff888017143864 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff888017143800 R14: ffff888017143864 R15: ffff88801b811804 acpi_idle_enter+0x369/0x510 drivers/acpi/processor_idle.c:692 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:238 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xce/0xdb Allocated by task 0: (stack is not available) Freed by task 3682: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:367 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780 slab_free mm/slub.c:3534 [inline] kfree+0xe2/0x4d0 mm/slub.c:4562 skb_free_head+0xac/0x110 net/core/skbuff.c:655 skb_release_data+0x5f5/0x870 net/core/skbuff.c:684 skb_release_all net/core/skbuff.c:749 [inline] __kfree_skb net/core/skbuff.c:763 [inline] consume_skb net/core/skbuff.c:927 [inline] consume_skb+0xc2/0x160 net/core/skbuff.c:921 nsim_dev_trap_report drivers/net/netdevsim/dev.c:815 [inline] nsim_dev_trap_report_work+0x855/0xba0 drivers/net/netdevsim/dev.c:840 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88807c394000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 744 bytes inside of 4096-byte region [ffff88807c394000, ffff88807c395000) The buggy address belongs to the physical page: page:ffffea0001f0e400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c390 head:ffffea0001f0e400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011842140 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3682, tgid 3682 (kworker/1:5), ts 1629822374092, free_ts 1629814648927 prep_new_page mm/page_alloc.c:2457 [inline] get_page_from_freelist+0x1298/0x3b80 mm/page_alloc.c:4203 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5431 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1824 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1969 new_slab mm/slub.c:2029 [inline] ___slab_alloc+0x99f/0xe10 mm/slub.c:3031 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118 slab_alloc_node mm/slub.c:3209 [inline] __kmalloc_node_track_caller+0x34f/0x4a0 mm/slub.c:4955 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0xde/0x340 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1434 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:742 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:799 [inline] nsim_dev_trap_report_work+0x291/0xba0 drivers/net/netdevsim/dev.c:840 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3344 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3439 device_release+0x9f/0x240 drivers/base/core.c:2241 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:721 put_device+0x1b/0x30 drivers/base/core.c:3535 ath9k_htc_probe_device+0x1c7/0x1f00 drivers/net/wireless/ath/ath9k/htc_drv_init.c:976 ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:508 ath9k_hif_usb_firmware_cb+0x274/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1245 request_firmware_work_func+0x12c/0x230 drivers/base/firmware_loader/main.c:1107 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff88807c394180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807c394200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807c394280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807c394300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807c394380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ---------------- Code disassembly (best guess): 0: 89 de mov %ebx,%esi 2: e8 9a d3 ff f7 callq 0xf7ffd3a1 7: 84 db test %bl,%bl 9: 75 98 jne 0xffffffa3 b: e8 91 d7 ff f7 callq 0xf7ffd7a1 10: e8 fc 26 06 f8 callq 0xf8062711 15: 66 90 xchg %ax,%ax 17: e8 85 d7 ff f7 callq 0xf7ffd7a1 1c: 0f 00 2d fe 24 b9 00 verw 0xb924fe(%rip) # 0xb92521 23: e8 79 d7 ff f7 callq 0xf7ffd7a1 28: fb sti 29: f4 hlt * 2a: 9c pushfq <-- trapping instruction 2b: 5b pop %rbx 2c: 81 e3 00 02 00 00 and $0x200,%ebx 32: fa cli 33: 31 ff xor %edi,%edi 35: 48 89 de mov %rbx,%rsi 38: e8 c4 d3 ff f7 callq 0xf7ffd401 3d: 48 85 db test %rbx,%rbx