netlink: 12 bytes leftover after parsing attributes in process `syz.0.0'. loop0: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff88803562940c by task syz.0.0/5115 CPU: 0 UID: 0 PID: 5115 Comm: syz.0.0 Not tainted 6.11.0-rc6-syzkaller-00308-gb31c44928842 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 hfsplus_readdir+0x93b/0x1320 fs/hfsplus/dir.c:207 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa3d557cef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa3d6293038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fa3d5735f80 RCX: 00007fa3d557cef9 RDX: 00000000000000ac RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007fa3d55ef046 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa3d5735f80 R15: 00007ffcf54a5eb8 Allocated by task 5115: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_readdir+0x20e/0x1320 fs/hfsplus/dir.c:144 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888035629000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes to the right of allocated 1036-byte region [ffff888035629000, ffff88803562940c) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35628 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 04fff00000000040 ffff88801ac42000 0000000000000000 0000000000000001 raw: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 04fff00000000040 ffff88801ac42000 0000000000000000 0000000000000001 head: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 04fff00000000003 ffffea0000d58a01 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 8, tgid 8 (kworker/0:0), ts 82099025600, free_ts 82098241655 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2325 allocate_slab+0x5a/0x2f0 mm/slub.c:2488 new_slab mm/slub.c:2541 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3727 __slab_alloc+0x58/0xa0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4181 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6526 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2815 sock_alloc_send_skb include/net/sock.h:1778 [inline] mld_newpack+0x1c3/0xa90 net/ipv6/mcast.c:1746 add_grhead net/ipv6/mcast.c:1849 [inline] add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1987 mld_send_cr net/ipv6/mcast.c:2113 [inline] mld_ifc_work+0x691/0xd90 net/ipv6/mcast.c:2650 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 page last free pid 5098 tgid 5098 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2619 discard_slab mm/slub.c:2587 [inline] __put_partials+0xeb/0x130 mm/slub.c:3055 put_cpu_partial+0x17c/0x250 mm/slub.c:3130 __slab_free+0x2ea/0x3d0 mm/slub.c:4347 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] kset_create lib/kobject.c:965 [inline] kset_create_and_add+0x5b/0x170 lib/kobject.c:1008 register_queue_kobjects net/core/net-sysfs.c:1887 [inline] netdev_register_kobject+0x1a8/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10444 team_newlink+0x10a/0x170 drivers/net/team/team_core.c:2217 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink net/core/rtnetlink.c:3730 [inline] rtnl_newlink+0x1591/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 Memory state around the buggy address: ffff888035629300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888035629380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888035629400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888035629480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888035629500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================