Bluetooth: hci1: HCI_REQ-0x0c1a ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0xa5/0xb0 lib/list_debug.c:30 Read of size 8 at addr ffff888016ff45c8 by task syz-executor.0/12864 CPU: 1 PID: 12864 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-02770-g79d878f7ad8e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 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+0xa5/0xb0 lib/list_debug.c:30 __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] register_shrinker_prepared+0x37/0x120 mm/vmscan.c:684 sget_fc+0x5e7/0x7c0 fs/super.c:581 vfs_get_super fs/super.c:1163 [inline] get_tree_nodev+0x24/0x1d0 fs/super.c:1198 mqueue_get_tree+0xee/0x130 ipc/mqueue.c:435 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 fc_mount+0x13/0xc0 fs/namespace.c:1043 mq_create_mount ipc/mqueue.c:485 [inline] mq_init_ns+0x43e/0x630 ipc/mqueue.c:1701 create_ipc_ns ipc/namespace.c:58 [inline] copy_ipcs+0x35e/0x5e0 ipc/namespace.c:94 create_new_namespaces+0x210/0xb20 kernel/nsproxy.c:90 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3181 __do_sys_unshare kernel/fork.c:3252 [inline] __se_sys_unshare kernel/fork.c:3250 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3250 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 RIP: 0033:0x7f2a7ca8cb67 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffe2bb09ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007ffe2bb0a128 RCX: 00007f2a7ca8cb67 RDX: 0000000000000000 RSI: 00007f2a7cafe41c RDI: 0000000008000000 RBP: 00007ffe2bb09ac0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000044000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffe2bb09bc0 R14: 00007f2a7cbac9d8 R15: 000000000000000c Allocated by task 12757: 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:605 [inline] kzalloc include/linux/slab.h:733 [inline] ops_init+0xfb/0x470 net/core/net_namespace.c:124 setup_net+0x5d1/0xc50 net/core/net_namespace.c:325 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x304d/0x7090 kernel/fork.c:2257 kernel_clone+0xe7/0xab0 kernel/fork.c:2671 __do_sys_clone+0xba/0x100 kernel/fork.c:2805 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 Freed by task 12757: 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:1759 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xe2/0x580 mm/slub.c:4567 ops_init+0xcd/0x470 net/core/net_namespace.c:139 setup_net+0x5d1/0xc50 net/core/net_namespace.c:325 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x304d/0x7090 kernel/fork.c:2257 kernel_clone+0xe7/0xab0 kernel/fork.c:2671 __do_sys_clone+0xba/0x100 kernel/fork.c:2805 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 The buggy address belongs to the object at ffff888016ff4000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1480 bytes inside of 2048-byte region [ffff888016ff4000, ffff888016ff4800) The buggy address belongs to the physical page: page:ffffea00005bfc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff0 head:ffffea00005bfc00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011842000 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 12753, tgid 12746 (syz-executor.5), ts 618927020270, free_ts 617283160174 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x84f/0xe80 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] __kmalloc_node+0x2e2/0x380 mm/slub.c:4473 kmalloc_node include/linux/slab.h:623 [inline] kzalloc_node include/linux/slab.h:744 [inline] qdisc_alloc+0xb0/0xba0 net/sched/sch_generic.c:938 qdisc_create_dflt+0x71/0x4a0 net/sched/sch_generic.c:996 mq_init+0x34c/0x4a0 net/sched/sch_mq.c:90 qdisc_create_dflt+0x101/0x4a0 net/sched/sch_generic.c:1003 attach_default_qdiscs net/sched/sch_generic.c:1174 [inline] dev_activate+0xa6f/0xcd0 net/sched/sch_generic.c:1228 __dev_open+0x393/0x4d0 net/core/dev.c:1441 __dev_change_flags+0x583/0x750 net/core/dev.c:8539 dev_change_flags+0x93/0x170 net/core/dev.c:8610 dev_ifsioc+0x99c/0x1120 net/core/dev_ioctl.c:327 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2553 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:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc+0x267/0x3b0 mm/slub.c:3273 ptlock_alloc mm/memory.c:5780 [inline] ptlock_init include/linux/mm.h:2261 [inline] pmd_ptlock_init include/linux/mm.h:2347 [inline] pgtable_pmd_page_ctor include/linux/mm.h:2383 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:129 [inline] __pmd_alloc+0xbf/0x5c0 mm/memory.c:5231 pmd_alloc include/linux/mm.h:2211 [inline] alloc_new_pmd mm/mremap.c:94 [inline] move_page_tables.part.0+0x222e/0x2d10 mm/mremap.c:535 move_page_tables+0x53/0x70 mm/mremap.c:489 shift_arg_pages+0x192/0x410 fs/exec.c:707 setup_arg_pages+0x6d9/0x850 fs/exec.c:828 load_elf_binary+0xb65/0x4e00 fs/binfmt_elf.c:1019 search_binary_handler fs/exec.c:1726 [inline] exec_binprm fs/exec.c:1767 [inline] bprm_execve fs/exec.c:1836 [inline] bprm_execve+0x7ef/0x1960 fs/exec.c:1798 do_execveat_common+0x727/0x890 fs/exec.c:1941 do_execve fs/exec.c:2015 [inline] __do_sys_execve fs/exec.c:2091 [inline] __se_sys_execve fs/exec.c:2086 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:2086 Memory state around the buggy address: ffff888016ff4480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888016ff4500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888016ff4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888016ff4600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888016ff4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================