syzbot

==================================================================
BUG: KASAN: use-after-free in ar5523_cmd_tx_cb+0x224/0x240 drivers/net/wireless/ath/ar5523/ar5523.c:228
Read of size 8 at addr ffff888020ecb450 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.0-rc5-syzkaller-00320-gb6e7fdfd6f6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15e/0x461 mm/kasan/report.c:395
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495
 ar5523_cmd_tx_cb+0x224/0x240 drivers/net/wireless/ath/ar5523/ar5523.c:228
 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1671
 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754
 dummy_timer+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers.part.0+0x6a2/0xaf0 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb7/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/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+0x1fd/0x2a0 drivers/acpi/processor_idle.c:572
Code: 89 de e8 d6 08 8b f7 84 db 75 ac e8 5d 0c 8b f7 e8 e8 8c 91 f7 66 90 e8 51 0c 8b f7 0f 00 2d 4a 8f be 00 e8 45 0c 8b f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 00 09 8b f7 48 85 db
RSP: 0018:ffffc9000037fd10 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888012958180 RSI: ffffffff89f42fdb RDI: 0000000000000000
RBP: ffff888145a02864 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888145a02800 R14: ffff888145a02864 R15: ffff888146ad6004
 acpi_idle_enter+0x368/0x510 drivers/acpi/processor_idle.c:709
 cpuidle_enter_state+0x1af/0xd40 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3f7/0x590 kernel/sched/idle.c:303
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:400
 start_secondary+0x256/0x300 arch/x86/kernel/smpboot.c:262
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000083b2c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20ecb
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 ffffffff00830101 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x2800(GFP_NOWAIT|__GFP_NOWARN), pid 25, tgid 25 (kworker/1:1), ts 64072837958, free_ts 64072840490
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288
 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5555
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285
 __stack_depot_save+0x3ed/0x560 lib/stackdepot.c:474
 kasan_save_stack+0x35/0x40 mm/kasan/common.c:46
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:511
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:177 [inline]
 __cache_free mm/slab.c:3389 [inline]
 __do_kmem_cache_free mm/slab.c:3585 [inline]
 kmem_cache_free mm/slab.c:3610 [inline]
 kmem_cache_free+0x108/0x4c0 mm/slab.c:3603
 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:562
 kernfs_put+0x46/0x50 fs/kernfs/dir.c:536
 kernfs_remove_by_name_ns+0xbc/0x120 fs/kernfs/dir.c:1637
 driver_sysfs_remove drivers/base/dd.c:477 [inline]
 really_probe+0x4f7/0xb90 drivers/base/dd.c:696
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:936
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483
 __stack_depot_save+0x16d/0x560 lib/stackdepot.c:506
 kasan_save_stack+0x35/0x40 mm/kasan/common.c:46
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:511
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:177 [inline]
 __cache_free mm/slab.c:3389 [inline]
 __do_kmem_cache_free mm/slab.c:3585 [inline]
 kmem_cache_free mm/slab.c:3610 [inline]
 kmem_cache_free+0x108/0x4c0 mm/slab.c:3603
 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:562
 kernfs_put+0x46/0x50 fs/kernfs/dir.c:536
 kernfs_remove_by_name_ns+0xbc/0x120 fs/kernfs/dir.c:1637
 driver_sysfs_remove drivers/base/dd.c:477 [inline]
 really_probe+0x4f7/0xb90 drivers/base/dd.c:696
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:936
 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:427

Memory state around the buggy address:
 ffff888020ecb300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888020ecb380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888020ecb400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                 ^
 ffff888020ecb480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888020ecb500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
----------------
Code disassembly (best guess):
   0:	89 de                	mov    %ebx,%esi
   2:	e8 d6 08 8b f7       	callq  0xf78b08dd
   7:	84 db                	test   %bl,%bl
   9:	75 ac                	jne    0xffffffb7
   b:	e8 5d 0c 8b f7       	callq  0xf78b0c6d
  10:	e8 e8 8c 91 f7       	callq  0xf7918cfd
  15:	66 90                	xchg   %ax,%ax
  17:	e8 51 0c 8b f7       	callq  0xf78b0c6d
  1c:	0f 00 2d 4a 8f be 00 	verw   0xbe8f4a(%rip)        # 0xbe8f6d
  23:	e8 45 0c 8b f7       	callq  0xf78b0c6d
  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 00 09 8b f7       	callq  0xf78b093d
  3d:	48 85 db             	test   %rbx,%rbx