================================================================== BUG: KASAN: use-after-free in __create_pipe include/linux/usb.h:1973 [inline] BUG: KASAN: use-after-free in send_packet+0xa08/0xbe0 drivers/media/rc/imon.c:627 Read of size 4 at addr ffff88807abdd000 by task syz-executor.4/9299 CPU: 0 PID: 9299 Comm: syz-executor.4 Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __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:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517 __create_pipe include/linux/usb.h:1973 [inline] send_packet+0xa08/0xbe0 drivers/media/rc/imon.c:627 vfd_write+0x2fc/0x570 drivers/media/rc/imon.c:989 vfs_write+0x2db/0xdd0 fs/read_write.c:582 ksys_write+0x12b/0x250 fs/read_write.c:637 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 RIP: 0033:0x7f66c308c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f66c1bfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f66c31ac050 RCX: 00007f66c308c0c9 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f66c30e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfd56199f R14: 00007f66c1bfe300 R15: 0000000000022000 Allocated by task 5163: 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:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] usb_alloc_dev+0x55/0xf00 drivers/usb/core/usb.c:582 hub_port_connect drivers/usb/core/hub.c:5310 [inline] hub_port_connect_change drivers/usb/core/hub.c:5552 [inline] port_event drivers/usb/core/hub.c:5712 [inline] hub_event+0x27db/0x4810 drivers/usb/core/hub.c:5794 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 5161: 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:518 ____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:177 [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/0x3b0 mm/slub.c:3800 device_release+0xa3/0x240 drivers/base/core.c:2331 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:721 put_device+0x1f/0x30 drivers/base/core.c:3586 hub_port_connect drivers/usb/core/hub.c:5247 [inline] hub_port_connect_change drivers/usb/core/hub.c:5552 [inline] port_event drivers/usb/core/hub.c:5712 [inline] hub_event+0x1fb5/0x4810 drivers/usb/core/hub.c:5794 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88807abdd000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of 2048-byte region [ffff88807abdd000, ffff88807abdd800) The buggy address belongs to the physical page: page:ffffea0001eaf600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7abd8 head:ffffea0001eaf600 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442000 ffffea0001dbb200 0000000000000002 raw: 0000000000000000 0000000000080008 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 8981, tgid 8965 (syz-executor.5), ts 595604702486, free_ts 595181416602 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2286 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 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+0x1a4/0x430 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x4a/0xd0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ops_init+0x16b/0x670 net/core/net_namespace.c:125 setup_net+0x793/0xe60 net/core/net_namespace.c:333 copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc5/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3202 __do_sys_unshare kernel/fork.c:3273 [inline] __se_sys_unshare kernel/fork.c:3271 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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:1446 [inline] free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1ea/0x430 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] ____ip_mc_inc_group+0x245/0xc80 net/ipv4/igmp.c:1449 __ip_mc_inc_group net/ipv4/igmp.c:1484 [inline] ip_mc_inc_group net/ipv4/igmp.c:1490 [inline] ip_mc_up+0x14f/0x370 net/ipv4/igmp.c:1789 inetdev_event+0xbd0/0x16c0 net/ipv4/devinet.c:1578 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944 call_netdevice_notifiers_extack net/core/dev.c:1982 [inline] call_netdevice_notifiers net/core/dev.c:1996 [inline] __dev_notify_flags+0x120/0x2d0 net/core/dev.c:8569 rtnl_configure_link+0x181/0x260 net/core/rtnetlink.c:3241 rtnl_newlink_create net/core/rtnetlink.c:3415 [inline] __rtnl_newlink+0x10f6/0x1840 net/core/rtnetlink.c:3624 Memory state around the buggy address: ffff88807abdcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807abdcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807abdd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807abdd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807abdd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================