Hello, syzbot found the following issue on: HEAD commit: 96e09b8f8166 Merge tag 'platform-drivers-x86-v6.10-3' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=143e77ba980000 kernel config: https://syzkaller.appspot.com/x/.config?x=96fd46a1ee1615e0 dashboard link: https://syzkaller.appspot.com/bug?extid=88fd97e5fd010b9cd053 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-96e09b8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d2bf80e54d1f/vmlinux-96e09b8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/b81837ec8c21/bzImage-96e09b8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+88fd97e5fd010b9cd053@xxxxxxxxxxxxxxxxxxxxxxxxx Bluetooth: hci5: Opcode 0x1003 failed: -110 ================================================================== 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 ffff888029af3104 by task kworker/u33:3/5232 CPU: 0 PID: 5232 Comm: kworker/u33:3 Not tainted 6.10.0-rc2-syzkaller-00269-g96e09b8f8166 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: hci3 hci_rx_work Call Trace: <TASK> __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 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x42/0x60 kernel/locking/spinlock.c:162 __sock_queue_rcv_skb+0x377/0xa80 net/core/sock.c:504 l2cap_sock_recv_cb+0xfa/0x3d0 net/bluetooth/l2cap_sock.c:1507 l2cap_conless_channel net/bluetooth/l2cap_core.c:6780 [inline] l2cap_recv_frame+0x20d0/0xa080 net/bluetooth/l2cap_core.c:6833 l2cap_recv_acldata+0x9ac/0xb60 net/bluetooth/l2cap_core.c:7516 hci_acldata_packet net/bluetooth/hci_core.c:3842 [inline] hci_rx_work+0xaa7/0x1610 net/bluetooth/hci_core.c:4079 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 7577: 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:4121 [inline] __kmalloc_noprof+0x1ec/0x420 mm/slub.c:4134 kmalloc_noprof include/linux/slab.h:664 [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.constprop.0+0x35/0x180 net/bluetooth/l2cap_sock.c:1869 l2cap_sock_create+0x123/0x1f0 net/bluetooth/l2cap_sock.c:1909 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+0x73/0x120 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 7576: 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+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kfree+0x12a/0x3b0 mm/slub.c:4557 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:1879 [inline] l2cap_sock_kill net/bluetooth/l2cap_sock.c:1246 [inline] l2cap_sock_kill+0x22f/0x270 net/bluetooth/l2cap_sock.c:1235 l2cap_sock_release+0x189/0x210 net/bluetooth/l2cap_sock.c:1417 __sock_release+0xb0/0x270 net/socket.c:659 sock_close+0x1c/0x30 net/socket.c:1421 __fput+0x408/0xbb0 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1555 [inline] __se_sys_close fs/open.c:1540 [inline] __ia32_sys_close+0x86/0x100 fs/open.c:1540 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 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 ffff888029af3000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 260 bytes inside of freed 2048-byte region [ffff888029af3000, ffff888029af3800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29af0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015442f00 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015442f00 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0000a6bc01 ffffffffffffffff 0000000000000000 head: 0000000000000008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4916, tgid 4916 (dhcpcd), ts 29721812125, free_ts 29702960673 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2264 allocate_slab mm/slub.c:2427 [inline] new_slab+0x84/0x260 mm/slub.c:2480 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmalloc_trace_noprof+0x2c5/0x310 mm/slub.c:4147 kmalloc_noprof include/linux/slab.h:660 [inline] rtnl_newlink+0x49/0xa0 net/core/rtnetlink.c:3739 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6635 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2585 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2639 __sys_sendmsg+0x117/0x1f0 net/socket.c:2668 page last free pid 5022 tgid 5022 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2565 __put_partials+0x14c/0x170 mm/slub.c:2994 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:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4007 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags include/linux/audit.h:322 [inline] getname+0x8f/0xe0 fs/namei.c:218 do_sys_openat2+0x104/0x1e0 fs/open.c:1399 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1431 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888029af3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029af3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888029af3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029af3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029af3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
