================================================================== BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 Read of size 4 at addr ffff88801f0ef1c4 by task kworker/u33:3/5212 CPU: 0 PID: 5212 Comm: kworker/u33:3 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: hci0 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x5f/0xf0 net/core/sock.c:3538 lock_sock include/net/sock.h:1671 [inline] l2cap_sock_recv_cb+0x54/0x1f0 net/bluetooth/l2cap_sock.c:1453 l2cap_conless_channel net/bluetooth/l2cap_core.c:6746 [inline] l2cap_recv_frame+0x1c52/0x9100 net/bluetooth/l2cap_core.c:6799 l2cap_recv_acldata+0xa3d/0xbf0 net/bluetooth/l2cap_core.c:7500 hci_acldata_packet net/bluetooth/hci_core.c:3939 [inline] hci_rx_work+0xaa7/0x1610 net/bluetooth/hci_core.c:4176 process_one_work+0x902/0x1a30 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 8835: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x1f9/0x440 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2080 sk_alloc+0x36/0xb90 net/core/sock.c:2133 bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148 l2cap_sock_alloc net/bluetooth/l2cap_sock.c:1815 [inline] l2cap_sock_create+0x131/0x2c0 net/bluetooth/l2cap_sock.c:1853 bt_sock_create+0x182/0x350 net/bluetooth/af_bluetooth.c:132 __sock_create+0x32e/0x800 net/socket.c:1571 sock_create net/socket.c:1622 [inline] __sys_socket_create net/socket.c:1659 [inline] __sys_socket+0x14f/0x260 net/socket.c:1706 __do_sys_socket net/socket.c:1720 [inline] __se_sys_socket net/socket.c:1718 [inline] __ia32_sys_socket+0x72/0xb0 net/socket.c:1718 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Freed by task 8833: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x129/0x390 mm/slub.c:4390 sk_prot_free net/core/sock.c:2116 [inline] __sk_destruct+0x5d8/0x730 net/core/sock.c:2208 sk_destruct+0xc2/0xf0 net/core/sock.c:2223 __sk_free+0xf4/0x3e0 net/core/sock.c:2234 sk_free+0x7c/0xa0 net/core/sock.c:2245 sock_put include/net/sock.h:1948 [inline] l2cap_sock_kill net/bluetooth/l2cap_sock.c:1212 [inline] l2cap_sock_kill+0x22f/0x270 net/bluetooth/l2cap_sock.c:1201 l2cap_sock_release+0x189/0x210 net/bluetooth/l2cap_sock.c:1383 __sock_release+0xb0/0x270 net/socket.c:659 sock_close+0x1c/0x30 net/socket.c:1421 __fput+0x270/0xb80 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __ia32_sys_close+0x86/0x100 fs/open.c:1541 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e The buggy address belongs to the object at ffff88801f0ef000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 452 bytes inside of freed 2048-byte region [ffff88801f0ef000, ffff88801f0ef800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f0e8 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888014c42f00 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888014c42f00 0000000000000000 dead000000000001 head: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea00007c3a01 ffffea00007c3a48 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 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 4675, tgid 1983563222 (klogd), ts 4675, free_ts 61808444722 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x670/0x16d0 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmalloc_trace+0x2fb/0x330 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] syslog_print+0xf9/0x5d0 kernel/printk/printk.c:1556 do_syslog+0x3be/0x6a0 kernel/printk/printk.c:1734 __do_sys_syslog kernel/printk/printk.c:1826 [inline] __se_sys_syslog kernel/printk/printk.c:1824 [inline] __x64_sys_syslog+0x74/0xb0 kernel/printk/printk.c:1824 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5446 tgid 5446 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 __put_partials+0x14c/0x170 mm/slub.c:2906 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmalloc_trace+0x147/0x330 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x368/0xa10 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1950 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] dev_set_mac_address+0x370/0x4a0 net/core/dev.c:8955 dev_set_mac_address_user+0x30/0x50 net/core/dev.c:8969 do_setlink+0x6c1/0x3ea0 net/core/rtnetlink.c:2839 __rtnl_newlink+0xc3a/0x1960 net/core/rtnetlink.c:3680 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595 Memory state around the buggy address: ffff88801f0ef080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f0ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801f0ef180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801f0ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f0ef280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================