================================================================== BUG: KASAN: slab-use-after-free in nfc_alloc_send_skb+0x189/0x1c0 net/nfc/core.c:726 Read of size 4 at addr ffff888147670548 by task syz-executor.0/5641 CPU: 0 PID: 5641 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-14263-gaea6bf908d73-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x170 mm/kasan/report.c:588 nfc_alloc_send_skb+0x189/0x1c0 net/nfc/core.c:726 nfc_llcp_send_ui_frame+0x2ac/0x670 net/nfc/llcp_commands.c:766 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2588 ___sys_sendmsg net/socket.c:2642 [inline] __sys_sendmmsg+0x3b2/0x730 net/socket.c:2728 __do_sys_sendmmsg net/socket.c:2757 [inline] __se_sys_sendmmsg net/socket.c:2754 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2754 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fac8927cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fac89f6c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fac8939bf80 RCX: 00007fac8927cae9 RDX: 0000000000000001 RSI: 00000000200013c0 RDI: 0000000000000004 RBP: 00007fac892c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fac8939bf80 R15: 00007ffd93790688 Allocated by task 5641: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] nfc_allocate_device+0x12f/0x520 net/nfc/core.c:1065 nci_allocate_device+0x1e2/0x360 net/nfc/nci/core.c:1179 virtual_ncidev_open+0x75/0x1b0 drivers/nfc/virtual_ncidev.c:136 misc_open+0x30b/0x380 drivers/char/misc.c:165 chrdev_open+0x5ab/0x630 fs/char_dev.c:414 do_dentry_open+0x8fd/0x1590 fs/open.c:948 do_open fs/namei.c:3622 [inline] path_openat+0x2845/0x3280 fs/namei.c:3779 do_filp_open+0x234/0x490 fs/namei.c:3809 do_sys_openat2+0x13e/0x1d0 fs/open.c:1440 do_sys_open fs/open.c:1455 [inline] __do_sys_openat fs/open.c:1471 [inline] __se_sys_openat fs/open.c:1466 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1466 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 5640: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x263/0x3a0 mm/slub.c:3822 device_release+0x95/0x1c0 kobject_cleanup lib/kobject.c:682 [inline] kobject_release lib/kobject.c:716 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1ee/0x430 lib/kobject.c:733 nfc_free_device include/net/nfc/nfc.h:213 [inline] nci_free_device+0x38/0x50 net/nfc/nci/core.c:1209 virtual_ncidev_close+0x70/0x90 drivers/nfc/virtual_ncidev.c:164 __fput+0x3cc/0xa10 fs/file_table.c:394 __do_sys_close fs/open.c:1590 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2667 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2781 netlink_release+0x162a/0x1b00 net/netlink/af_netlink.c:831 __sock_release net/socket.c:659 [inline] sock_close+0xb8/0x230 net/socket.c:1419 __fput+0x3cc/0xa10 fs/file_table.c:394 __do_sys_close fs/open.c:1590 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2667 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2781 netlink_release+0x162a/0x1b00 net/netlink/af_netlink.c:831 __sock_release net/socket.c:659 [inline] sock_close+0xb8/0x230 net/socket.c:1419 __fput+0x3cc/0xa10 fs/file_table.c:394 __do_sys_close fs/open.c:1590 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff888147670000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1352 bytes inside of freed 2048-byte region [ffff888147670000, ffff888147670800) The buggy address belongs to the physical page: page:ffffea00051d9c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147670 head:ffffea00051d9c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x57ff00000000840(slab|head|node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 057ff00000000840 ffff888012c42000 0000000000000000 dead000000000001 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2879381771, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x339a/0x3530 mm/page_alloc.c:3312 __alloc_pages+0x255/0x670 mm/page_alloc.c:4568 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x21d/0x300 mm/slub.c:3517 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0x103/0x2a0 drivers/acpi/acpica/dswstate.c:518 acpi_ps_execute_method+0x245/0x870 drivers/acpi/acpica/psxface.c:134 acpi_ns_evaluate+0x5df/0xa40 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x59b/0xaf0 drivers/acpi/acpica/nsxfeval.c:354 acpi_evaluate_integer+0x11b/0x2f0 drivers/acpi/utils.c:260 acpi_bus_get_status_handle drivers/acpi/bus.c:82 [inline] acpi_bus_get_status+0x174/0x3a0 drivers/acpi/bus.c:111 acpi_scan_init_status drivers/acpi/scan.c:1813 [inline] acpi_add_single_object+0x35c/0x1d70 drivers/acpi/scan.c:1846 page_owner free stack trace missing Memory state around the buggy address: ffff888147670400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888147670480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888147670500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888147670580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888147670600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================