================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff0000d5b26a18 by task syz-executor.2/10529 CPU: 0 PID: 10529 Comm: syz-executor.2 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 10529: 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 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:3732 addrconf_sysctl_unregister net/ipv6/addrconf.c:7148 [inline] addrconf_ifdown+0x14ec/0x1814 net/ipv6/addrconf.c:3930 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] unregister_netdevice_many+0xec4/0x189c net/core/dev.c:11093 unregister_netdevice_queue+0x2d0/0x31c net/core/dev.c:11026 unregister_netdevice include/linux/netdevice.h:3012 [inline] nsim_destroy+0x58/0x164 drivers/net/netdevsim/netdev.c:382 __nsim_dev_port_del+0x148/0x1a8 drivers/net/netdevsim/dev.c:1349 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1362 [inline] nsim_dev_reload_destroy+0x13c/0x214 drivers/net/netdevsim/dev.c:1561 nsim_dev_remove+0x5c/0x108 drivers/net/netdevsim/dev.c:1577 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:381 __device_release_driver drivers/base/dd.c:1227 [inline] device_release_driver_internal+0x428/0x6ac drivers/base/dd.c:1262 device_release_driver+0x28/0x38 drivers/base/dd.c:1285 bus_remove_device+0x298/0x38c drivers/base/bus.c:529 device_del+0x57c/0x9b4 drivers/base/core.c:3597 device_unregister+0x2c/0xcc drivers/base/core.c:3630 nsim_bus_dev_del drivers/net/netdevsim/bus.c:454 [inline] del_device_store+0x2a4/0x3bc drivers/net/netdevsim/bus.c:354 bus_attr_store+0x80/0xa4 drivers/base/bus.c:122 sysfs_kf_write+0x200/0x280 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x334/0x48c fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x87c/0xb3c fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __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 The buggy address belongs to the object at ffff0000d5b26800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff0000d5b26800, ffff0000d5b26c00) The buggy address belongs to the page: page:0000000038e12ba2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115b20 head:0000000038e12ba2 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffe00000010200(slab|head|node=0|zone=2|lastcpupid=0xfff) raw: 05ffe00000010200 0000000000000000 0000000400000001 ffff0000c0002780 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d5b26900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d5b26980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d5b26a00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d5b26a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d5b26b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== hfsplus: unicode conversion failed