================================================================== BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:636 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0xdab/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:680 Read of size 4 at addr ffff888110e3c0b8 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x4c8 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:636 [inline] ath9k_hif_usb_rx_cb+0xdab/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:680 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1728 dummy_timer+0x11f4/0x3280 drivers/usb/gadget/udc/dummy_hcd.c:1969 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1410 expire_timers kernel/time/timer.c:1455 [inline] __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1747 __run_timers kernel/time/timer.c:1728 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1760 __do_softirq+0x1b2/0x945 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 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:79 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:169 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] RIP: 0010:acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:517 Code: 8d 2d a2 fb 84 db 75 ac e8 34 35 a2 fb e8 5f db a7 fb e9 0c 00 00 00 e8 25 35 a2 fb 0f 00 2d 7e c6 6a 00 e8 19 35 a2 fb fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 b4 2d a2 fb 48 85 db RSP: 0018:ffffc900000dfd18 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff1079831 RDX: ffff888100293280 RSI: ffffffff859c9727 RDI: ffffffff859c9711 RBP: ffff8881022e4064 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff8881022e4000 R14: ffff8881022e4064 R15: ffff888105d64804 acpi_idle_enter+0x355/0x4f0 drivers/acpi/processor_idle.c:648 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:132 [inline] cpuidle_idle_call kernel/sched/idle.c:213 [inline] do_idle+0x3d5/0x580 kernel/sched/idle.c:273 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:369 start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xa6/0xab Allocated by task 21153: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:526 [inline] slab_alloc_node mm/slub.c:2891 [inline] slab_alloc mm/slub.c:2899 [inline] kmem_cache_alloc+0x10d/0x390 mm/slub.c:2904 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags fs/namei.c:2647 [inline] user_path_at_empty+0xa1/0x100 fs/namei.c:2647 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x142/0x390 fs/stat.c:185 vfs_fstatat fs/stat.c:207 [inline] vfs_lstat include/linux/fs.h:3109 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:362 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 21153: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x102/0x140 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kmem_cache_free+0x8b/0x5d0 mm/slub.c:3158 putname+0xe1/0x120 fs/namei.c:259 filename_lookup+0x3b1/0x560 fs/namei.c:2377 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x142/0x390 fs/stat.c:185 vfs_fstatat fs/stat.c:207 [inline] vfs_lstat include/linux/fs.h:3109 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:362 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888110e3b300 which belongs to the cache names_cache of size 4096 The buggy address is located 3512 bytes inside of 4096-byte region [ffff888110e3b300, ffff888110e3c300) The buggy address belongs to the page: page:000000001e0b6efe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110e38 head:000000001e0b6efe order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff888100164140 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888110e3bf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888110e3c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888110e3c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888110e3c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888110e3c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================