================================================================== BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:639 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0xddb/0x1040 drivers/net/wireless/ath/ath9k/hif_usb.c:683 Read of size 4 at addr ffff8880498c4178 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:639 [inline] ath9k_hif_usb_rx_cb+0xddb/0x1040 drivers/net/wireless/ath/ath9k/hif_usb.c:683 __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+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1978 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431 expire_timers kernel/time/timer.c:1476 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745 __run_timers kernel/time/timer.c:1726 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:tick_nohz_idle_enter+0x19f/0x250 kernel/time/tick-sched.c:1078 Code: df 48 c1 ea 03 0f b6 04 02 48 89 ea 83 e2 07 38 d0 7f 04 84 c0 75 78 80 4b 4c 04 e8 cb cc e8 ff e8 f6 81 12 00 fb 48 83 c4 08 <5b> 5d c3 e8 29 72 0c 00 65 8b 1d 3e 8f 99 7e 31 ff 89 de e8 c9 79 RSP: 0018:ffffffff8b407e40 EFLAGS: 00000292 RAX: 0000000000048289 RBX: ffff8880b9c26d00 RCX: 1ffffffff1a925e9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff8880b9c26d4c R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817ae9f8 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 do_idle+0x94/0x590 kernel/sched/idle.c:280 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403 start_kernel+0x475/0x496 init/main.c:1087 secondary_startup_64_no_verify+0xb0/0xbb Allocated by task 0: (stack is not available) Freed by task 10091: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1582 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1607 slab_free mm/slub.c:3167 [inline] kfree+0xe5/0x7f0 mm/slub.c:4217 skb_free_head net/core/skbuff.c:651 [inline] skb_release_data+0x622/0x750 net/core/skbuff.c:672 skb_release_all net/core/skbuff.c:726 [inline] __kfree_skb net/core/skbuff.c:740 [inline] consume_skb net/core/skbuff.c:896 [inline] consume_skb+0xc2/0x160 net/core/skbuff.c:890 nsim_dev_trap_report drivers/net/netdevsim/dev.c:586 [inline] nsim_dev_trap_report_work+0x86f/0xbd0 drivers/net/netdevsim/dev.c:611 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 The buggy address belongs to the object at ffff8880498c4000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 376 bytes inside of 4096-byte region [ffff8880498c4000, ffff8880498c5000) The buggy address belongs to the page: page:ffffea0001263000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x498c0 head:ffffea0001263000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010842140 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 10091, ts 91530634486, free_ts 91518835485 prep_new_page mm/page_alloc.c:2358 [inline] get_page_from_freelist+0x1033/0x2b60 mm/page_alloc.c:3994 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1645 [inline] allocate_slab+0x2c5/0x4c0 mm/slub.c:1785 new_slab mm/slub.c:1848 [inline] new_slab_objects mm/slub.c:2594 [inline] ___slab_alloc+0x4a1/0x810 mm/slub.c:2757 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2797 slab_alloc_node mm/slub.c:2879 [inline] __kmalloc_node_track_caller+0x2e6/0x350 mm/slub.c:4596 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0xde/0x340 net/core/skbuff.c:425 alloc_skb include/linux/skbuff.h:1107 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:513 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:570 [inline] nsim_dev_trap_report_work+0x2ac/0xbd0 drivers/net/netdevsim/dev.c:611 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1298 [inline] __free_pages_ok+0x476/0xce0 mm/page_alloc.c:1572 device_release+0x9f/0x240 drivers/base/core.c:2190 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 put_device+0x1b/0x30 drivers/base/core.c:3432 ath9k_htc_probe_device+0x1c7/0x1e50 drivers/net/wireless/ath/ath9k/htc_drv_init.c:976 ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:503 ath9k_hif_usb_firmware_cb+0x274/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1242 request_firmware_work_func+0x12c/0x230 drivers/base/firmware_loader/main.c:1081 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Memory state around the buggy address: ffff8880498c4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880498c4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880498c4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880498c4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880498c4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================