loop3: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff0000cef69218 by task syz-executor.3/27760 CPU: 0 PID: 27760 Comm: syz-executor.3 Not tainted 5.15.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 Allocated by task 27760: 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+0x26c/0x404 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:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :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:3559 batadv_hardif_release net/batman-adv/hard-interface.c:54 [inline] kref_put include/linux/kref.h:65 [inline] batadv_hardif_put+0x100/0x19c net/batman-adv/hard-interface.h:95 batadv_hard_if_event+0x650/0xde8 net/batman-adv/hard-interface.c:996 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:1998 [inline] call_netdevice_notifiers_extack net/core/dev.c:2010 [inline] call_netdevice_notifiers net/core/dev.c:2024 [inline] unregister_netdevice_many+0xec4/0x189c net/core/dev.c:11065 ip_tunnel_delete_nets+0x2b4/0x308 net/ipv4/ip_tunnel.c:1123 erspan_exit_batch_net+0x30/0x40 net/ipv4/ip_gre.c:1721 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:596 process_one_work+0x84c/0x14b8 kernel/workqueue.c:2306 worker_thread+0x910/0x1034 kernel/workqueue.c:2453 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 :870 Second to 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:3559 drop_sysctl_table+0x274/0x3a0 fs/proc/proc_sysctl.c:1680 unregister_sysctl_table+0x94/0x130 fs/proc/proc_sysctl.c:1718 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x9c net/core/neighbour.c:3754 addrconf_sysctl_unregister net/ipv6/addrconf.c:7117 [inline] addrconf_ifdown+0x14ec/0x1814 net/ipv6/addrconf.c:3904 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:1998 [inline] call_netdevice_notifiers_extack net/core/dev.c:2010 [inline] call_netdevice_notifiers net/core/dev.c:2024 [inline] unregister_netdevice_many+0xec4/0x189c net/core/dev.c:11065 ip_tunnel_delete_nets+0x2b4/0x308 net/ipv4/ip_tunnel.c:1123 erspan_exit_batch_net+0x30/0x40 net/ipv4/ip_gre.c:1721 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:596 process_one_work+0x84c/0x14b8 kernel/workqueue.c:2306 worker_thread+0x910/0x1034 kernel/workqueue.c:2453 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 :870 The buggy address belongs to the object at ffff0000cef69000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff0000cef69000, ffff0000cef69400) The buggy address belongs to the page: page:00000000e51fdd25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ef68 head:00000000e51fdd25 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc00035ad400 0000000400000004 ffff0000c0002780 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cef69100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000cef69180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000cef69200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000cef69280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000cef69300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== hfsplus: unicode conversion failed