[drm] Initialized udl on minor 2 [drm:udl_get_edid_block] *ERROR* Read EDID byte 0 failed err ffffffb9 udl 6-1:0.0: [drm] Cannot find any crtc or sizes usb 6-1: USB disconnect, device number 25 ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x93/0xb0 lib/list_debug.c:27 Read of size 8 at addr ffff8880746ea788 by task kworker/1:3/31811 CPU: 1 PID: 31811 Comm: kworker/1:3 Not tainted 6.0.0-rc3-next-20220831-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 __list_add_valid+0x93/0xb0 lib/list_debug.c:27 __list_add include/linux/list.h:69 [inline] list_add include/linux/list.h:88 [inline] list_move include/linux/list.h:218 [inline] udl_get_urb_timeout+0x20e/0x550 drivers/gpu/drm/udl/udl_main.c:250 udl_free_urb_list+0x15f/0x250 drivers/gpu/drm/udl/udl_main.c:156 udl_drop_usb+0xd0/0x160 drivers/gpu/drm/udl/udl_main.c:358 udl_usb_disconnect+0x3f/0x50 drivers/gpu/drm/udl/udl_drv.c:114 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:550 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:542 __device_release_driver drivers/base/dd.c:1239 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1265 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3704 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 31811: 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:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:695 [inline] udl_alloc_urb_list drivers/gpu/drm/udl/udl_main.c:190 [inline] udl_init+0x736/0xc80 drivers/gpu/drm/udl/udl_main.c:331 udl_driver_create drivers/gpu/drm/udl/udl_drv.c:79 [inline] udl_usb_probe+0x4f/0x100 drivers/gpu/drm/udl/udl_drv.c:94 usb_probe_interface+0x30b/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:560 [inline] really_probe+0x249/0xb90 drivers/base/dd.c:639 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808 __device_attach_driver+0x206/0x2e0 drivers/base/dd.c:931 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:1003 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xbd5/0x1e90 drivers/base/core.c:3517 usb_set_configuration+0x1019/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd4/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:560 [inline] really_probe+0x249/0xb90 drivers/base/dd.c:639 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808 __device_attach_driver+0x206/0x2e0 drivers/base/dd.c:931 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:1003 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xbd5/0x1e90 drivers/base/core.c:3517 usb_new_device.cold+0x685/0x10ad drivers/usb/core/hub.c:2573 hub_port_connect drivers/usb/core/hub.c:5353 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x26c7/0x4610 drivers/usb/core/hub.c:5735 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 31811: 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:367 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1651 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1677 slab_free mm/slub.c:3580 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3593 udl_free_urb_list+0x136/0x250 drivers/gpu/drm/udl/udl_main.c:164 udl_drop_usb+0xd0/0x160 drivers/gpu/drm/udl/udl_main.c:358 udl_usb_disconnect+0x3f/0x50 drivers/gpu/drm/udl/udl_drv.c:114 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:550 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:542 __device_release_driver drivers/base/dd.c:1239 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1265 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3704 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff8880746ea780 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 8 bytes inside of 32-byte region [ffff8880746ea780, ffff8880746ea7a0) The buggy address belongs to the physical page: page:ffffea0001d1ba80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x746ea flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888011841500 raw: 0000000000000000 0000000000400040 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3638, tgid 3638 (syz-executor.2), ts 185398521587, free_ts 185396270916 prep_new_page mm/page_alloc.c:2534 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4284 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5542 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1721 [inline] allocate_slab+0x228/0x370 mm/slub.c:1866 new_slab mm/slub.c:1919 [inline] ___slab_alloc+0xad0/0x1440 mm/slub.c:3100 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3198 slab_alloc_node mm/slub.c:3283 [inline] __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3356 kmalloc_trace+0x22/0x60 mm/slab_common.c:1010 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:695 [inline] ref_tracker_alloc+0x14c/0x550 lib/ref_tracker.c:85 netns_tracker_alloc include/net/net_namespace.h:327 [inline] get_net_track include/net/net_namespace.h:343 [inline] sk_alloc+0x1fe/0x770 net/core/sock.c:2084 unix_create1+0xaa/0x920 net/unix/af_unix.c:958 unix_create+0x110/0x220 net/unix/af_unix.c:1025 __sock_create+0x355/0x790 net/socket.c:1515 sock_create net/socket.c:1566 [inline] __sys_socket_create net/socket.c:1603 [inline] __sys_socket_create net/socket.c:1588 [inline] __sys_socket+0x12f/0x240 net/socket.c:1636 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1451 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3382 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3478 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:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3317 [inline] kmem_cache_alloc_node+0x2ff/0x400 mm/slub.c:3362 __alloc_skb+0x210/0x2f0 net/core/skbuff.c:418 alloc_skb include/linux/skbuff.h:1258 [inline] nlmsg_new include/net/netlink.h:955 [inline] netlink_ack+0x393/0xc50 net/netlink/af_netlink.c:2490 netlink_rcv_skb+0x33d/0x420 net/netlink/af_netlink.c:2544 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 __sys_sendto+0x236/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2125 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+0x63/0xcd Memory state around the buggy address: ffff8880746ea680: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff8880746ea700: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc >ffff8880746ea780: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff8880746ea800: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff8880746ea880: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ==================================================================