Hello, syzbot found the following issue on: HEAD commit: 6012273897fe Add linux-next specific files for 20220615 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1085e108080000 kernel config: https://syzkaller.appspot.com/x/.config?x=b4154677977b1776 dashboard link: https://syzkaller.appspot.com/bug?extid=b131c4a0d4802c9e13a4 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b131c4a0d4802c9e13a4@xxxxxxxxxxxxxxxxxxxxxxxxx powermate: config urb returned -71 powermate: config urb returned -108 powermate: config urb returned -108 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3ab9/0x5660 kernel/locking/lockdep.c:4923 Read of size 8 at addr ffff88807e821258 by task udevd/2975 CPU: 0 PID: 2975 Comm: udevd Not tainted 5.19.0-rc2-next-20220615-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __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 __lock_acquire+0x3ab9/0x5660 kernel/locking/lockdep.c:4923 lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 powermate_config_complete+0x79/0xb0 drivers/input/misc/powermate.c:202 __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 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:list_empty_careful include/linux/list.h:329 [inline] RIP: 0010:ep_poll fs/eventpoll.c:1867 [inline] RIP: 0010:do_epoll_wait+0x10ad/0x1930 fs/eventpoll.c:2234 Code: 0f 84 22 02 00 00 e8 f2 19 90 ff 48 8b 74 24 28 48 8b 5c 24 08 48 89 df e8 50 d2 ff ff 48 89 df e8 88 35 92 07 e9 25 02 00 00 <e8> ce 19 90 ff 48 8b 84 24 60 01 00 00 48 39 e8 0f 85 47 fc ff ff RSP: 0018:ffffc90002d5fc88 EFLAGS: 00000246 RAX: ffffc90002d5fde0 RBX: ffff88807c850000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81eaa567 RDI: ffff88807c850018 RBP: ffffc90002d5fde0 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffffc R11: 0000000000000001 R12: ffff88807d557d40 R13: ffff88807d557cd0 R14: ffff88807d557cd0 R15: dffffc0000000000 __do_sys_epoll_wait fs/eventpoll.c:2246 [inline] __se_sys_epoll_wait fs/eventpoll.c:2241 [inline] __x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f3f62f33e46 Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 18 48 89 74 24 RSP: 002b:00007ffd5b9f9ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 00007ffd5b9f9fe8 RCX: 00007f3f62f33e46 RDX: 0000000000000008 RSI: 00007ffd5b9f9fe8 RDI: 000000000000000b RBP: 00007ffd5b9f9fb0 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000bb8 R13: 0000561a491ae800 R14: 0000000000000000 R15: 0000000000000000 </TASK> Allocated by task 6: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] powermate_probe+0x24a/0x12a0 drivers/input/misc/powermate.c:323 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:530 [inline] really_probe+0x24e/0xbb0 drivers/base/dd.c:609 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:748 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:778 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:901 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:973 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xbda/0x1ea0 drivers/base/core.c:3505 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:530 [inline] really_probe+0x24e/0xbb0 drivers/base/dd.c:609 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:748 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:778 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:901 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:973 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xbda/0x1ea0 drivers/base/core.c:3505 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5346 [inline] hub_port_connect_change drivers/usb/core/hub.c:5490 [inline] port_event drivers/usb/core/hub.c:5646 [inline] hub_event+0x25d5/0x4690 drivers/usb/core/hub.c:5728 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:302 Freed by task 3684: 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:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 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:3536 [inline] kfree+0xd6/0x4d0 mm/slub.c:4584 powermate_disconnect+0x1ce/0x250 drivers/input/misc/powermate.c:432 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:520 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:512 __device_release_driver drivers/base/dd.c:1206 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1232 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3692 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5190 [inline] hub_port_connect_change drivers/usb/core/hub.c:5490 [inline] port_event drivers/usb/core/hub.c:5646 [inline] hub_event+0x1e83/0x4690 drivers/usb/core/hub.c:5728 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:302 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x940 kernel/rcu/tree.c:3322 drop_sysctl_table+0x3c0/0x4e0 fs/proc/proc_sysctl.c:1716 unregister_sysctl_table fs/proc/proc_sysctl.c:1754 [inline] unregister_sysctl_table+0xc0/0x190 fs/proc/proc_sysctl.c:1729 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7108 [inline] addrconf_sysctl_unregister+0xee/0x1c0 net/ipv6/addrconf.c:7136 addrconf_ifdown.isra.0+0x128c/0x1830 net/ipv6/addrconf.c:3903 addrconf_notify+0xeb/0x1ba0 net/ipv6/addrconf.c:3673 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1943 call_netdevice_notifiers_extack net/core/dev.c:1981 [inline] call_netdevice_notifiers net/core/dev.c:1995 [inline] unregister_netdevice_many+0x92e/0x1890 net/core/dev.c:10852 sit_exit_batch_net+0x530/0x750 net/ipv6/sit.c:1944 ops_exit_list+0x125/0x170 net/core/net_namespace.c:168 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:595 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:302 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x940 kernel/rcu/tree.c:3322 drop_sysctl_table+0x3c0/0x4e0 fs/proc/proc_sysctl.c:1716 unregister_sysctl_table fs/proc/proc_sysctl.c:1754 [inline] unregister_sysctl_table+0xc0/0x190 fs/proc/proc_sysctl.c:1729 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7108 [inline] addrconf_exit_net+0x172/0x3f0 net/ipv6/addrconf.c:7230 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:163 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:595 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:302 The buggy address belongs to the object at ffff88807e821200 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 88 bytes inside of 256-byte region [ffff88807e821200, ffff88807e821300) The buggy address belongs to the physical page: page:ffffea0001fa0800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e820 head:ffffea0001fa0800 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001e4ee80 dead000000000006 ffff888011841b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 47, tgid 47 (kworker/u4:3), ts 157338031839, free_ts 157327323829 prep_new_page mm/page_alloc.c:2525 [inline] get_page_from_freelist+0x1efe/0x3a20 mm/page_alloc.c:4296 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5512 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2279 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+0x9c4/0xe20 mm/slub.c:3031 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118 slab_alloc_node mm/slub.c:3209 [inline] slab_alloc mm/slub.c:3251 [inline] __kmalloc+0x318/0x350 mm/slub.c:4442 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] ieee80211_ibss_build_presp+0x138/0x1760 net/mac80211/ibss.c:70 __ieee80211_sta_join_ibss+0x681/0x1810 net/mac80211/ibss.c:317 ieee80211_sta_create_ibss.cold+0xcf/0x117 net/mac80211/ibss.c:1347 ieee80211_sta_find_ibss net/mac80211/ibss.c:1477 [inline] ieee80211_ibss_work.cold+0x30e/0x60f net/mac80211/ibss.c:1706 ieee80211_iface_work+0xb83/0xd10 net/mac80211/iface.c:1601 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:302 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1443 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1493 free_unref_page_prepare mm/page_alloc.c:3373 [inline] free_unref_page+0x19/0x560 mm/page_alloc.c:3470 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3243 [inline] kmem_cache_alloc_node+0x255/0x3f0 mm/slub.c:3293 alloc_task_struct_node kernel/fork.c:171 [inline] dup_task_struct kernel/fork.c:963 [inline] copy_process+0x5c4/0x7080 kernel/fork.c:2065 kernel_clone+0xe7/0xab0 kernel/fork.c:2649 __do_sys_clone+0xba/0x100 kernel/fork.c:2783 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88807e821100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e821180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807e821200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e821280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e821300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ---------------- Code disassembly (best guess): 0: 0f 84 22 02 00 00 je 0x228 6: e8 f2 19 90 ff callq 0xff9019fd b: 48 8b 74 24 28 mov 0x28(%rsp),%rsi 10: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx 15: 48 89 df mov %rbx,%rdi 18: e8 50 d2 ff ff callq 0xffffd26d 1d: 48 89 df mov %rbx,%rdi 20: e8 88 35 92 07 callq 0x79235ad 25: e9 25 02 00 00 jmpq 0x24f * 2a: e8 ce 19 90 ff callq 0xff9019fd <-- trapping instruction 2f: 48 8b 84 24 60 01 00 mov 0x160(%rsp),%rax 36: 00 37: 48 39 e8 cmp %rbp,%rax 3a: 0f 85 47 fc ff ff jne 0xfffffc87 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
