================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3c7b/0x56e0 kernel/locking/lockdep.c:4250 Read of size 8 at addr ffff88801e938940 by task syz-executor.1/9508 CPU: 2 PID: 9508 Comm: syz-executor.1 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 __lock_acquire+0x3c7b/0x56e0 kernel/locking/lockdep.c:4250 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:159 usblp_bulk_read+0x211/0x270 drivers/usb/class/usblp.c:303 __usb_hcd_giveback_urb+0x30d/0x540 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716 skbpoolfree drivers/block/aoe/aoedev.c:432 [inline] freedev drivers/block/aoe/aoedev.c:290 [inline] dummy_timer+0x11ea/0x2f9f drivers/block/aoe/aoedev.c:366 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773 __run_timers kernel/time/timer.c:1745 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786 __do_softirq+0x34c/0xa60 kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x229/0x270 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x54/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 RIP: 0010:qlist_free_all+0x2f/0x140 mm/kasan/quarantine.c:165 Code: 55 41 54 55 53 48 8b 1f 48 85 db 0f 84 08 01 00 00 48 89 f5 49 89 fd 48 85 ed 49 89 ee 0f 84 8b 00 00 00 49 63 86 3c 01 00 00 <4c> 8b 23 48 29 c3 48 83 3d 2b bf 01 08 00 0f 84 e6 00 00 00 9c 58 RSP: 0018:ffffc90001b27470 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880214bb380 RCX: ffffea00009d7e07 RDX: 0000000000000000 RSI: ffffffff8134589a RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880214bb380 R13: ffffc90001b274a8 R14: ffff88802c8001c0 R15: 0000000000000282 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:260 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:475 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc_node mm/slab.c:3263 [inline] kmem_cache_alloc_node_trace+0x140/0x400 mm/slab.c:3593 kmalloc_node include/linux/slab.h:573 [inline] kzalloc_node include/linux/slab.h:680 [inline] __get_vm_area_node+0x126/0x3b0 mm/vmalloc.c:2105 __vmalloc_node_range mm/vmalloc.c:2536 [inline] __vmalloc_node mm/vmalloc.c:2584 [inline] vmalloc+0xf2/0x1a0 mm/vmalloc.c:2617 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline] netlink_sendmsg+0x5f0/0xd90 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 sock_no_sendpage+0xee/0x130 net/core/sock.c:2853 kernel_sendpage net/socket.c:3642 [inline] sock_sendpage+0xe5/0x140 net/socket.c:945 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:448 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x3dc/0x830 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:834 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x171/0x2f0 fs/splice.c:1016 splice_direct_to_actor+0x38c/0x980 fs/splice.c:971 do_splice_direct+0x1b3/0x280 fs/splice.c:1059 do_sendfile+0x559/0xc30 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1587 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c049 Code: Bad RIP value. RSP: 002b:00007f44175ebc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000713f40 RCX: 000000000045c049 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 RBP: 00000000004a906e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100006800 R11: 0000000000000246 R12: 000000000074bf00 R13: 00007fff48702fef R14: 00007f44175cc000 R15: 0000000000000003 Allocated by task 61: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 kmem_cache_alloc_trace+0x14f/0x2d0 mm/slab.c:3551 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] usblp_probe+0xed/0x1110 drivers/usb/class/usblp.c:1105 usb_probe_interface+0x2f7/0x780 drivers/usb/core/driver.c:374 really_probe+0x282/0x8a0 drivers/base/dd.c:520 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:696 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x3f0 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xacf/0x1be0 drivers/base/core.c:2700 usb_set_configuration+0xef6/0x17a0 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241 usb_probe_device+0xc6/0x210 drivers/usb/core/driver.c:272 really_probe+0x282/0x8a0 drivers/base/dd.c:520 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:696 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x3f0 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xacf/0x1be0 drivers/base/core.c:2700 usb_new_device.cold+0x748/0x103b drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x2033/0x3e40 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Freed by task 9476: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 __cache_free mm/slab.c:3426 [inline] kfree+0x103/0x2c0 mm/slab.c:3757 usblp_release.cold+0xd/0x12 drivers/usb/class/usblp.c:471 __fput+0x33c/0x880 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:135 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:239 [inline] __prepare_exit_to_usermode+0x1e9/0x1f0 arch/x86/entry/common.c:269 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88801e938800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 320 bytes inside of 1024-byte region [ffff88801e938800, ffff88801e938c00) The buggy address belongs to the page: page:ffffea00007a4e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801e938000 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00008f7f88 ffffea00003fc5c8 ffff88802c800c40 raw: ffff88801e938000 ffff88801e938000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801e938800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801e938880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801e938900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801e938980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801e938a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================