================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff0000e9767a18 by task syz-executor.4/6380 CPU: 1 PID: 6380 Comm: syz-executor.4 Not tainted 5.15.156-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load2_noabort+0x44/0x50 mm/kasan/report_generic.c:307 hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179 hfsplus_listxattr+0x5bc/0xc9c fs/hfsplus/xattr.c:736 vfs_listxattr fs/xattr.c:448 [inline] listxattr+0x29c/0x3e4 fs/xattr.c:783 path_listxattr fs/xattr.c:807 [inline] __do_sys_llistxattr fs/xattr.c:825 [inline] __se_sys_llistxattr fs/xattr.c:822 [inline] __arm64_sys_llistxattr+0x13c/0x21c fs/xattr.c:822 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 6380: 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+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x29c/0x4c8 mm/slub.c:4407 kmalloc include/linux/slab.h:596 [inline] hfsplus_find_init+0x84/0x1bc fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x31c/0xc9c fs/hfsplus/xattr.c:696 vfs_listxattr fs/xattr.c:448 [inline] listxattr+0x29c/0x3e4 fs/xattr.c:783 path_listxattr fs/xattr.c:807 [inline] __do_sys_llistxattr fs/xattr.c:825 [inline] __se_sys_llistxattr fs/xattr.c:822 [inline] __arm64_sys_llistxattr+0x13c/0x21c fs/xattr.c:822 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596 neigh_destroy+0x474/0x6f4 net/core/neighbour.c:860 neigh_release include/net/neighbour.h:419 [inline] neigh_cleanup_and_release+0x140/0x390 net/core/neighbour.c:103 neigh_flush_dev+0x188/0x82c net/core/neighbour.c:374 __neigh_ifdown+0x58/0x370 net/core/neighbour.c:391 neigh_ifdown+0x2c/0x40 net/core/neighbour.c:408 rt6_disable_ip+0x618/0x6ac net/ipv6/route.c:4919 addrconf_ifdown+0x150/0x1814 net/ipv6/addrconf.c:3777 addrconf_notify+0x350/0xc58 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2018 [inline] call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] dev_close_many+0x2fc/0x468 net/core/dev.c:1619 unregister_netdevice_many+0x408/0x189c net/core/dev.c:11069 ip6gre_exit_batch_net+0x3f4/0x444 net/ipv6/ip6_gre.c:1650 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:596 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000e9767800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff0000e9767800, ffff0000e9767c00) The buggy address belongs to the page: page:000000008fffaeda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129760 head:000000008fffaeda order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffe00000010200(slab|head|node=0|zone=2|lastcpupid=0xfff) raw: 05ffe00000010200 0000000000000000 0000000e00000001 ffff0000c0002780 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e9767900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e9767980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e9767a00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000e9767a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e9767b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== hfsplus: unicode conversion failed