================================================================== BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x26/0xc4 lib/list_debug.c:29 Read of size 8 at addr ff600000147c4008 by task syz-executor.0/13100 CPU: 0 PID: 13100 Comm: syz-executor.0 Not tainted 6.5.0-syzkaller-ge0152e7481c6 #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:121 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:127 [] __dump_stack lib/dump_stack.c:88 [inline] [] dump_stack_lvl+0xe8/0x154 lib/dump_stack.c:106 [] print_address_description mm/kasan/report.c:364 [inline] [] print_report+0x1e4/0x4f4 mm/kasan/report.c:475 [] kasan_report+0xf0/0x1ba mm/kasan/report.c:588 [] check_region_inline mm/kasan/generic.c:181 [inline] [] __asan_load8+0x80/0xa8 mm/kasan/generic.c:260 [] __list_add_valid_or_report+0x26/0xc4 lib/list_debug.c:29 [] __list_add_valid include/linux/list.h:88 [inline] [] __list_add include/linux/list.h:150 [inline] [] list_add include/linux/list.h:169 [inline] [] nfc_llcp_register_device+0x47c/0x4ea net/nfc/llcp_core.c:1639 [] nfc_register_device+0x8c/0x2b4 net/nfc/core.c:1124 [] nci_register_device+0x534/0x612 net/nfc/nci/core.c:1257 [] virtual_ncidev_open+0xf8/0x172 drivers/nfc/virtual_ncidev.c:148 [] misc_open+0x2b2/0x2e8 drivers/char/misc.c:165 [] chrdev_open+0x1cc/0x474 fs/char_dev.c:414 [] do_dentry_open+0x4d0/0xa84 fs/open.c:929 [] vfs_open+0x52/0x5e fs/open.c:1063 [] do_open fs/namei.c:3639 [inline] [] path_openat+0x1014/0x1714 fs/namei.c:3796 [] do_filp_open+0x126/0x252 fs/namei.c:3823 [] do_sys_openat2+0x170/0x1bc 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] [] __riscv_sys_openat+0x136/0x1a4 fs/open.c:1448 [] syscall_handler+0x76/0xba arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x9c/0x9e arch/riscv/kernel/traps.c:312 [] ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Allocated by task 13094: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:45 kasan_set_track+0x1a/0x26 mm/kasan/common.c:52 kasan_save_alloc_info+0x1a/0x24 mm/kasan/generic.c:511 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xa8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] kmalloc_trace+0x44/0x56 mm/slab_common.c:1119 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] nfc_llcp_register_device+0x48/0x4ea net/nfc/llcp_core.c:1602 nfc_register_device+0x8c/0x2b4 net/nfc/core.c:1124 nci_register_device+0x534/0x612 net/nfc/nci/core.c:1257 virtual_ncidev_open+0xf8/0x172 drivers/nfc/virtual_ncidev.c:148 misc_open+0x2b2/0x2e8 drivers/char/misc.c:165 chrdev_open+0x1cc/0x474 fs/char_dev.c:414 do_dentry_open+0x4d0/0xa84 fs/open.c:929 vfs_open+0x52/0x5e fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1014/0x1714 fs/namei.c:3796 do_filp_open+0x126/0x252 fs/namei.c:3823 do_sys_openat2+0x170/0x1bc 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] __riscv_sys_openat+0x136/0x1a4 fs/open.c:1448 syscall_handler+0x76/0xba arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x9c/0x9e arch/riscv/kernel/traps.c:312 ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Freed by task 13068: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:45 kasan_set_track+0x1a/0x26 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x46 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15e/0x20c mm/kasan/common.c:200 __kasan_slab_free+0x10/0x18 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0xca/0x1b4 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0xa4/0x31a mm/slub.c:3822 kfree+0xa2/0x176 mm/slab_common.c:1072 local_release net/nfc/llcp_core.c:175 [inline] kref_put include/linux/kref.h:65 [inline] nfc_llcp_local_put.part.0+0x94/0xc4 net/nfc/llcp_core.c:183 nfc_llcp_local_put net/nfc/llcp_core.c:180 [inline] nfc_llcp_unregister_device+0x144/0x1c8 net/nfc/llcp_core.c:1655 nfc_unregister_device+0x124/0x234 net/nfc/core.c:1179 nci_unregister_device+0x168/0x182 net/nfc/nci/core.c:1303 virtual_ncidev_close+0x38/0x6e drivers/nfc/virtual_ncidev.c:163 __fput+0x252/0x594 fs/file_table.c:384 __fput_sync+0x5e/0x72 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __riscv_sys_close+0x56/0xba fs/open.c:1557 syscall_handler+0x76/0xba arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x9c/0x9e arch/riscv/kernel/traps.c:312 ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Last potentially related work creation: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:45 __kasan_record_aux_stack+0xf6/0x13e mm/kasan/generic.c:492 kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:502 __call_rcu_common.constprop.0+0x80/0x4d6 kernel/rcu/tree.c:2653 call_rcu+0xc/0x14 kernel/rcu/tree.c:2767 netlink_release+0xc60/0x16de net/netlink/af_netlink.c:831 __sock_release+0x7a/0x170 net/socket.c:659 sock_close+0x1e/0x2a net/socket.c:1401 __fput+0x252/0x594 fs/file_table.c:384 __fput_sync+0x5e/0x72 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __riscv_sys_close+0x56/0xba fs/open.c:1557 syscall_handler+0x76/0xba arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x9c/0x9e arch/riscv/kernel/traps.c:312 ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Second to last potentially related work creation: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:45 __kasan_record_aux_stack+0xf6/0x13e mm/kasan/generic.c:492 kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:502 __call_rcu_common.constprop.0+0x80/0x4d6 kernel/rcu/tree.c:2653 call_rcu+0xc/0x14 kernel/rcu/tree.c:2767 netlink_release+0xc60/0x16de net/netlink/af_netlink.c:831 __sock_release+0x7a/0x170 net/socket.c:659 sock_close+0x1e/0x2a net/socket.c:1401 __fput+0x252/0x594 fs/file_table.c:384 __fput_sync+0x5e/0x72 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __riscv_sys_close+0x56/0xba fs/open.c:1557 syscall_handler+0x76/0xba arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x9c/0x9e arch/riscv/kernel/traps.c:312 ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 The buggy address belongs to the object at ff600000147c4000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 8 bytes inside of freed 2048-byte region [ff600000147c4000, ff600000147c4800) The buggy address belongs to the physical page: page:ff1c00000251f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x947c0 head:ff1c00000251f000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xffe000000000840(slab|head|node=0|zone=0|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 0ffe000000000840 ff60000008402000 0000000000000100 0000000000000122 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 6696, tgid 6694 (syz-executor.0), ts 6359423436000, free_ts 6356833115600 __set_page_owner+0x32/0x18a mm/page_owner.c:192 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x8c/0xe2 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x912/0x122c mm/page_alloc.c:3183 __alloc_pages+0x19c/0x142c mm/page_alloc.c:4439 alloc_pages+0x126/0x252 mm/mempolicy.c:2298 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab mm/slub.c:2017 [inline] new_slab+0x272/0x382 mm/slub.c:2070 ___slab_alloc+0x5b6/0xa92 mm/slub.c:3223 __slab_alloc.constprop.0+0x58/0x94 mm/slub.c:3322 __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0xf0/0x2e0 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1022 [inline] __kmalloc+0x36/0xe6 mm/slab_common.c:1036 kmalloc include/linux/slab.h:603 [inline] sk_prot_alloc+0x152/0x202 net/core/sock.c:2089 sk_alloc+0x34/0x6a4 net/core/sock.c:2142 pfkey_create+0xd0/0x368 net/key/af_key.c:152 __sock_create+0x302/0x6dc net/socket.c:1551 sock_create net/socket.c:1602 [inline] __sys_socket_create net/socket.c:1639 [inline] __sys_socket+0x13a/0x22c net/socket.c:1690 __do_sys_socket net/socket.c:1704 [inline] __se_sys_socket net/socket.c:1702 [inline] __riscv_sys_socket+0x52/0x60 net/socket.c:1702 page last free stack trace: __reset_page_owner+0x4c/0xf8 mm/page_owner.c:149 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x224/0x592 mm/page_alloc.c:2312 free_unref_page+0x5a/0x234 mm/page_alloc.c:2405 free_the_page mm/page_alloc.c:562 [inline] __free_pages+0x104/0x126 mm/page_alloc.c:4529 __free_slab+0xbc/0x112 mm/slub.c:2087 free_slab+0x38/0x190 mm/slub.c:2110 discard_slab+0x3e/0x56 mm/slub.c:2116 __slab_free+0x2b4/0x2de mm/slub.c:3715 do_slab_free mm/slub.c:3757 [inline] ___cache_free+0x136/0x154 mm/slub.c:3816 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x7a/0x16c mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x158/0x1ba mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x5e/0x84 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x1a6/0x2be mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xf8/0x5e4 fs/kernfs/dir.c:611 kernfs_new_node+0x66/0xbe fs/kernfs/dir.c:675 __kernfs_create_file+0x4e/0x1e8 fs/kernfs/file.c:1047 Memory state around the buggy address: ff600000147c3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ff600000147c3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ff600000147c4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ff600000147c4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff600000147c4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================