On Sun, 2 Apr 2023 at 03:56, syzbot <syzbot+c599a813ad1dab060558@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: a6d9e3034536 Add linux-next specific files for 20230330 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15955acdc80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=aceb117f7924508e > dashboard link: https://syzkaller.appspot.com/bug?extid=c599a813ad1dab060558 > 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. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/ec1f900ea929/disk-a6d9e303.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/fabbf89c0d22/vmlinux-a6d9e303.xz > kernel image: https://storage.googleapis.com/syzbot-assets/1ed05d6192fa/bzImage-a6d9e303.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+c599a813ad1dab060558@xxxxxxxxxxxxxxxxxxxxxxxxx #syz dup: KASAN: slab-use-after-free Read in class_register > ================================================================== > BUG: KASAN: slab-use-after-free in is_dynamic_key.part.0+0x1de/0x1f0 kernel/locking/lockdep.c:1264 > Read of size 8 at addr ffff888035beeb60 by task kworker/u4:9/5292 > > CPU: 1 PID: 5292 Comm: kworker/u4:9 Not tainted 6.3.0-rc4-next-20230330-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 > Workqueue: netns cleanup_net > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 > print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 > print_report mm/kasan/report.c:462 [inline] > kasan_report+0x11c/0x130 mm/kasan/report.c:572 > is_dynamic_key.part.0+0x1de/0x1f0 kernel/locking/lockdep.c:1264 > is_dynamic_key kernel/locking/lockdep.c:883 [inline] > register_lock_class+0xbe3/0x1120 kernel/locking/lockdep.c:1297 > __lock_acquire+0x10a/0x5df0 kernel/locking/lockdep.c:4951 > lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691 > __flush_workqueue+0x118/0x13a0 kernel/workqueue.c:2925 > drain_workqueue+0x1c1/0x3e0 kernel/workqueue.c:3090 > destroy_workqueue+0xc8/0x8e0 kernel/workqueue.c:4558 > tipc_crypto_stop+0x4a4/0x510 net/tipc/crypto.c:1525 > tipc_exit_net+0x8c/0x110 net/tipc/core.c:119 > ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 > cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 > process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 > worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 > kthread+0x33e/0x440 kernel/kthread.c:379 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 > </TASK> > > Allocated by task 11762: > kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 > kasan_set_track+0x25/0x30 mm/kasan/common.c:52 > ____kasan_kmalloc mm/kasan/common.c:374 [inline] > ____kasan_kmalloc mm/kasan/common.c:333 [inline] > __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 > kmalloc include/linux/slab.h:559 [inline] > kzalloc include/linux/slab.h:680 [inline] > class_register+0x55/0x530 drivers/base/class.c:165 > class_create+0x99/0x100 drivers/base/class.c:249 > init_usb_class drivers/usb/core/file.c:91 [inline] > usb_register_dev+0x4e7/0x860 drivers/usb/core/file.c:179 > usblp_probe+0xc91/0x16d0 drivers/usb/class/usblp.c:1208 > usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396 > call_driver_probe drivers/base/dd.c:579 [inline] > really_probe+0x240/0xca0 drivers/base/dd.c:658 > __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 > driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 > __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 > bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 > __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 > bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 > device_add+0x11c4/0x1c50 drivers/base/core.c:3616 > usb_set_configuration+0x10ee/0x1af0 drivers/usb/core/message.c:2171 > usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238 > usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293 > call_driver_probe drivers/base/dd.c:579 [inline] > really_probe+0x240/0xca0 drivers/base/dd.c:658 > __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 > driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 > __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 > bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 > __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 > bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 > device_add+0x11c4/0x1c50 drivers/base/core.c:3616 > usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2575 > hub_port_connect drivers/usb/core/hub.c:5407 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] > port_event drivers/usb/core/hub.c:5711 [inline] > hub_event+0x2d9e/0x4e40 drivers/usb/core/hub.c:5793 > process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 > process_scheduled_works kernel/workqueue.c:2468 [inline] > worker_thread+0x881/0x10c0 kernel/workqueue.c:2554 > kthread+0x33e/0x440 kernel/kthread.c:379 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 > > Freed by task 11762: > kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 > kasan_set_track+0x25/0x30 mm/kasan/common.c:52 > kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 > ____kasan_slab_free mm/kasan/common.c:236 [inline] > ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 > kasan_slab_free include/linux/kasan.h:162 [inline] > slab_free_hook mm/slub.c:1781 [inline] > slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 > slab_free mm/slub.c:3787 [inline] > __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 > kobject_cleanup lib/kobject.c:683 [inline] > kobject_release lib/kobject.c:714 [inline] > kref_put include/linux/kref.h:65 [inline] > kobject_put+0x1c2/0x4d0 lib/kobject.c:731 > kset_unregister+0x64/0x80 lib/kobject.c:880 > class_destroy+0x3c/0x50 drivers/base/class.c:273 > release_usb_class drivers/usb/core/file.c:108 [inline] > kref_put include/linux/kref.h:65 [inline] > destroy_usb_class drivers/usb/core/file.c:116 [inline] > usb_deregister_dev+0x274/0x320 drivers/usb/core/file.c:245 > usblp_disconnect+0x4a/0x330 drivers/usb/class/usblp.c:1396 > usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458 > device_remove drivers/base/dd.c:569 [inline] > device_remove+0x11f/0x170 drivers/base/dd.c:561 > __device_release_driver drivers/base/dd.c:1267 [inline] > device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1290 > bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 > device_del+0x48a/0xb80 drivers/base/core.c:3802 > usb_disable_device+0x35a/0x7b0 drivers/usb/core/message.c:1420 > usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2238 > hub_port_connect drivers/usb/core/hub.c:5246 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] > port_event drivers/usb/core/hub.c:5711 [inline] > hub_event+0x1fbf/0x4e40 drivers/usb/core/hub.c:5793 > process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 > worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 > kthread+0x33e/0x440 kernel/kthread.c:379 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 > > Last potentially related work creation: > kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 > __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 > insert_work+0x48/0x360 kernel/workqueue.c:1365 > __queue_work+0x5c6/0xfb0 kernel/workqueue.c:1526 > queue_work_on+0xf2/0x110 kernel/workqueue.c:1554 > ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 > cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 > process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 > worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 > kthread+0x33e/0x440 kernel/kthread.c:379 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 > > The buggy address belongs to the object at ffff888035bee800 > which belongs to the cache kmalloc-1k of size 1024 > The buggy address is located 864 bytes inside of > freed 1024-byte region [ffff888035bee800, ffff888035beec00) > > The buggy address belongs to the physical page: > page:ffffea0000d6fa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888035bec800 pfn:0x35be8 > head:ffffea0000d6fa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 > flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) > page_type: 0xffffffff() > raw: 00fff00000010200 ffff888012441dc0 ffffea0000d29810 ffffea00005faa10 > raw: ffff888035bec800 000000000010000c 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11694, tgid 11684 (syz-executor.2), ts 1151559040316, free_ts 1151272040314 > prep_new_page mm/page_alloc.c:1729 [inline] > get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 > __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 > alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 > alloc_slab_page mm/slub.c:1851 [inline] > allocate_slab+0x28e/0x380 mm/slub.c:1998 > new_slab mm/slub.c:2051 [inline] > ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 > __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 > __slab_alloc_node mm/slub.c:3345 [inline] > slab_alloc_node mm/slub.c:3442 [inline] > __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 > kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 > kmalloc include/linux/slab.h:559 [inline] > kzalloc include/linux/slab.h:680 [inline] > ip_vs_est_add_kthread+0x1bd/0x820 net/netfilter/ipvs/ip_vs_est.c:327 > ip_vs_start_estimator+0x244/0x420 net/netfilter/ipvs/ip_vs_est.c:499 > ip_vs_control_net_init_sysctl net/netfilter/ipvs/ip_vs_ctl.c:4380 [inline] > ip_vs_control_net_init+0x1426/0x19f0 net/netfilter/ipvs/ip_vs_ctl.c:4466 > __ip_vs_init+0x21f/0x530 net/netfilter/ipvs/ip_vs_core.c:2310 > ops_init+0xb9/0x6b0 net/core/net_namespace.c:136 > setup_net+0x5d1/0xc50 net/core/net_namespace.c:339 > copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 > create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 > page last free stack trace: > reset_page_owner include/linux/page_owner.h:24 [inline] > free_pages_prepare mm/page_alloc.c:1302 [inline] > free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 > free_unref_page+0x33/0x370 mm/page_alloc.c:2650 > __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 > qlink_free mm/kasan/quarantine.c:166 [inline] > qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 > kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 > __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 > kasan_slab_alloc include/linux/kasan.h:186 [inline] > slab_post_alloc_hook mm/slab.h:711 [inline] > slab_alloc_node mm/slub.c:3452 [inline] > slab_alloc mm/slub.c:3460 [inline] > __kmem_cache_alloc_lru mm/slub.c:3467 [inline] > kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3476 > getname_flags.part.0+0x50/0x4f0 fs/namei.c:140 > getname_flags+0x9e/0xe0 include/linux/audit.h:321 > getname fs/namei.c:219 [inline] > __do_sys_symlinkat fs/namei.c:4440 [inline] > __se_sys_symlinkat fs/namei.c:4437 [inline] > __x64_sys_symlinkat+0x7b/0xc0 fs/namei.c:4437 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > Memory state around the buggy address: > ffff888035beea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff888035beea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > >ffff888035beeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff888035beeb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff888035beec00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ================================================================== > > > --- > 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. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000220dbf05f850c188%40google.com.
