loop5: 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+0x670/0x10f0 fs/hfsplus/unicode.c:210 Read of size 2 at addr ffff0000d03c5218 by task syz.5.675/6800 CPU: 1 PID: 6800 Comm: syz.5.675 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349 hfsplus_uni2asc+0x670/0x10f0 fs/hfsplus/unicode.c:210 hfsplus_listxattr+0x4a8/0x9e8 fs/hfsplus/xattr.c:740 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x29c/0x3cc fs/xattr.c:804 path_listxattr+0xdc/0x1b4 fs/xattr.c:828 __do_sys_listxattr fs/xattr.c:840 [inline] __se_sys_listxattr fs/xattr.c:837 [inline] __arm64_sys_listxattr+0x80/0x94 fs/xattr.c:837 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 6800: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xec/0x178 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] hfsplus_find_init+0x84/0x1bc fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x2fc/0x9e8 fs/hfsplus/xattr.c:700 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x29c/0x3cc fs/xattr.c:804 path_listxattr+0xdc/0x1b4 fs/xattr.c:828 __do_sys_listxattr fs/xattr.c:840 [inline] __se_sys_listxattr fs/xattr.c:837 [inline] __arm64_sys_listxattr+0x80/0x94 fs/xattr.c:837 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 kvfree_call_rcu+0xb4/0x6f0 kernel/rcu/tree.c:3405 neigh_destroy+0x458/0x660 net/core/neighbour.c:923 neigh_release include/net/neighbour.h:448 [inline] neigh_cleanup_and_release+0x154/0x3bc net/core/neighbour.c:104 neigh_flush_dev+0x18c/0x7f4 net/core/neighbour.c:430 __neigh_ifdown+0x54/0x3d8 net/core/neighbour.c:447 neigh_ifdown+0x2c/0x40 net/core/neighbour.c:465 rt6_disable_ip+0x75c/0x7c8 net/ipv6/route.c:4951 addrconf_ifdown+0x144/0x15dc net/ipv6/addrconf.c:3798 addrconf_notify+0x2f4/0xca8 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2001 [inline] call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers net/core/dev.c:2053 [inline] dev_close_many+0x2cc/0x440 net/core/dev.c:1601 unregister_netdevice_many+0x3c4/0x1740 net/core/dev.c:10964 default_device_exit_batch+0x9a8/0xa40 net/core/dev.c:11503 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x644/0xa74 net/core/net_namespace.c:640 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 The buggy address belongs to the object at ffff0000d03c5000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff0000d03c5000, ffff0000d03c5400) The buggy address belongs to the physical page: page:00000000d4f06ab4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1103c0 head:00000000d4f06ab4 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002780 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d03c5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d03c5180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d03c5200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d03c5280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d03c5300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================