loop2: detected capacity change from 0 to 1024 hfsplus: invalid length 256 has been corrected to 255 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x5b9/0x1240 fs/hfsplus/unicode.c:210 Read of size 2 at addr ffff88802843c218 by task syz.2.42/4512 CPU: 1 PID: 4512 Comm: syz.2.42 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 hfsplus_uni2asc+0x5b9/0x1240 fs/hfsplus/unicode.c:210 hfsplus_listxattr+0x58b/0xb80 fs/hfsplus/xattr.c:740 vfs_listxattr fs/xattr.c:448 [inline] listxattr+0x283/0x2e0 fs/xattr.c:783 path_listxattr+0xd9/0x1b0 fs/xattr.c:807 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f9aac55d749 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:00007f9aaa7c4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000c2 RAX: ffffffffffffffda RBX: 00007f9aac7b3fa0 RCX: 00007f9aac55d749 RDX: 000000000000002f RSI: 0000000000000000 RDI: 0000200000000080 RBP: 00007f9aac5e1f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9aac7b4038 R14: 00007f9aac7b3fa0 R15: 00007ffd2ffb9bb8 Allocated by task 4512: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:612 [inline] kzalloc include/linux/slab.h:738 [inline] hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x38c/0xb80 fs/hfsplus/xattr.c:700 vfs_listxattr fs/xattr.c:448 [inline] listxattr+0x283/0x2e0 fs/xattr.c:783 path_listxattr+0xd9/0x1b0 fs/xattr.c:807 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88802843c000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff88802843c000, ffff88802843c400) The buggy address belongs to the page: page:ffffea0000a10e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28438 head:ffffea0000a10e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000a5c800 0000000500000005 ffff888016841dc0 raw: 0000000000000000 0000000000100010 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 154, ts 68782822182, free_ts 68618739192 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] __kmalloc_node_track_caller+0x1fc/0x3a0 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_rt_notify+0xdd/0x290 net/ipv6/route.c:6181 fib6_add_rt2node net/ipv6/ip6_fib.c:1255 [inline] fib6_add+0x1d3b/0x3d30 net/ipv6/ip6_fib.c:1484 __ip6_ins_rt net/ipv6/route.c:1305 [inline] ip6_route_add+0x86/0x130 net/ipv6/route.c:3869 addrconf_prefix_route net/ipv6/addrconf.c:2446 [inline] addrconf_add_linklocal+0x453/0x6b0 net/ipv6/addrconf.c:3240 addrconf_addr_gen+0x4ee/0x620 net/ipv6/addrconf.c:3369 addrconf_init_auto_addrs+0x6d5/0xa80 net/ipv6/addrconf.c:-1 addrconf_notify+0xa6b/0xf00 net/ipv6/addrconf.c:3662 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391 netdev_state_change+0xd2/0x140 net/core/dev.c:1440 linkwatch_do_dev+0x10d/0x160 net/core/link_watch.c:167 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 sock_alloc_inode+0x17/0xb0 net/socket.c:305 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x210 fs/inode.c:1001 sock_alloc net/socket.c:628 [inline] __sock_create+0x129/0x900 net/socket.c:1460 sock_create net/socket.c:1552 [inline] __sys_socketpair+0x1bd/0x540 net/socket.c:1652 __do_sys_socketpair net/socket.c:1705 [inline] __se_sys_socketpair net/socket.c:1702 [inline] __x64_sys_socketpair+0x97/0xb0 net/socket.c:1702 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff88802843c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802843c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802843c200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802843c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802843c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================