================================================================== BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline] BUG: KASAN: slab-use-after-free in __queue_work+0xfcf/0x1050 kernel/workqueue.c:1787 Read of size 8 at addr ffff88806597c350 by task syz-executor.3/14383 CPU: 3 PID: 14383 Comm: syz-executor.3 Not tainted 6.6.0-rc6-syzkaller-00312-g4d7b04c0cda3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 list_empty include/linux/list.h:373 [inline] __queue_work+0xfcf/0x1050 kernel/workqueue.c:1787 __queue_delayed_work+0x1bf/0x260 kernel/workqueue.c:1950 queue_delayed_work_on+0x106/0x130 kernel/workqueue.c:1986 queue_delayed_work include/linux/workqueue.h:569 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1549 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1519 [inline] __sco_sock_close+0x3b3/0x690 net/bluetooth/sco.c:444 sco_sock_close net/bluetooth/sco.c:469 [inline] sco_sock_release+0x6f/0x2c0 net/bluetooth/sco.c:1246 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x3f7/0xa70 fs/file_table.c:384 __fput_sync+0x47/0x50 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb0c507b9da Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffe81d52dd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fb0c507b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fb0c519d980 R08: 0000001b2f620000 R09: 000000000000023b R10: 0000000081727362 R11: 0000000000000293 R12: 00000000001bf7f5 R13: ffffffffffffffff R14: 00007fb0c4c00000 R15: 00000000001bf4b4 Allocated by task 14384: kasan_save_stack+0x33/0x50 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+0xa3/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] hci_conn_add+0xc2/0x17c0 net/bluetooth/hci_conn.c:957 hci_connect_sco+0x3a0/0xf80 net/bluetooth/hci_conn.c:1701 sco_connect net/bluetooth/sco.c:266 [inline] sco_sock_connect+0x2c7/0xa80 net/bluetooth/sco.c:591 __sys_connect_file+0x15b/0x1a0 net/socket.c:2050 __sys_connect+0x145/0x170 net/socket.c:2067 __do_sys_connect net/socket.c:2077 [inline] __se_sys_connect net/socket.c:2074 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7409: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] __cache_free mm/slab.c:3370 [inline] __do_kmem_cache_free mm/slab.c:3557 [inline] __kmem_cache_free+0xcc/0x2d0 mm/slab.c:3564 device_release+0xa1/0x240 drivers/base/core.c:2484 kobject_cleanup lib/kobject.c:682 [inline] kobject_release lib/kobject.c:716 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1d0/0x440 lib/kobject.c:733 put_device+0x1f/0x30 drivers/base/core.c:3732 hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428 abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 The buggy address belongs to the object at ffff88806597c000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 848 bytes inside of freed 4096-byte region [ffff88806597c000, ffff88806597d000) The buggy address belongs to the physical page: page:ffffea0001965f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6597c head:ffffea0001965f00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x1() raw: 00fff00000000840 ffff888012c40900 ffffea0000c34610 ffffea000197fd90 raw: 0000000000000000 ffff88806597c000 0000000100000001 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 0x342040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 4642, tgid 4642 (udevd), ts 1826242512656, free_ts 1826123754455 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426 __alloc_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1356 [inline] cache_grow_begin+0x99/0x3a0 mm/slab.c:2550 cache_alloc_refill+0x294/0x3a0 mm/slab.c:2923 ____cache_alloc mm/slab.c:2999 [inline] ____cache_alloc mm/slab.c:2982 [inline] __do_cache_alloc mm/slab.c:3182 [inline] slab_alloc_node mm/slab.c:3230 [inline] __kmem_cache_alloc_node+0x3c5/0x470 mm/slab.c:3521 __do_kmalloc_node mm/slab_common.c:1025 [inline] __kmalloc+0x4f/0x100 mm/slab_common.c:1039 kmalloc include/linux/slab.h:603 [inline] tomoyo_realpath_from_path+0xb9/0x710 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x2a3/0x3b0 security/tomoyo/file.c:771 tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline] tomoyo_file_open+0xa8/0xd0 security/tomoyo/tomoyo.c:327 security_file_open+0x6a/0xe0 security/security.c:2836 do_dentry_open+0x538/0x1730 fs/open.c:916 do_open fs/namei.c:3640 [inline] path_openat+0x19af/0x29c0 fs/namei.c:3797 do_filp_open+0x1de/0x430 fs/namei.c:3824 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1448 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405 slab_destroy mm/slab.c:1608 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1628 cache_flusharray mm/slab.c:3341 [inline] ___cache_free+0x2b7/0x420 mm/slab.c:3404 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x4c/0x1b0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slab.c:3237 [inline] __kmem_cache_alloc_node+0x163/0x470 mm/slab.c:3521 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1117 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] selinux_sk_alloc_security+0x87/0x210 security/selinux/hooks.c:5171 security_sk_alloc+0x72/0xb0 security/security.c:4411 sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2093 sk_alloc+0x3a/0x7f0 net/core/sock.c:2143 inet_create net/ipv4/af_inet.c:325 [inline] inet_create+0x3a1/0x1020 net/ipv4/af_inet.c:251 __sock_create+0x328/0x800 net/socket.c:1569 sock_create net/socket.c:1620 [inline] __sys_socket_create net/socket.c:1657 [inline] __sys_socket+0x14c/0x260 net/socket.c:1708 Memory state around the buggy address: ffff88806597c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806597c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806597c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806597c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806597c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================