================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x576/0x11f0 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff88805848c218 by task syz-executor.1/4273 CPU: 0 PID: 4273 Comm: syz-executor.1 Not tainted 6.1.90-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 hfsplus_uni2asc+0x576/0x11f0 fs/hfsplus/unicode.c:179 hfsplus_listxattr+0x70a/0xf00 fs/hfsplus/xattr.c:736 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x282/0x2e0 fs/xattr.c:804 path_listxattr fs/xattr.c:828 [inline] __do_sys_llistxattr fs/xattr.c:846 [inline] __se_sys_llistxattr fs/xattr.c:843 [inline] __x64_sys_llistxattr+0x16f/0x230 fs/xattr.c:843 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6078e7dd69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6079bd60c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 RAX: ffffffffffffffda RBX: 00007f6078fabf80 RCX: 00007f6078e7dd69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f6078eca49e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6078fabf80 R15: 00007ffc64c76688 Allocated by task 4273: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0xb2/0x230 mm/slab_common.c:968 kmalloc include/linux/slab.h:561 [inline] hfsplus_find_init+0x81/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x3bd/0xf00 fs/hfsplus/xattr.c:696 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x282/0x2e0 fs/xattr.c:804 path_listxattr fs/xattr.c:828 [inline] __do_sys_llistxattr fs/xattr.c:846 [inline] __se_sys_llistxattr fs/xattr.c:843 [inline] __x64_sys_llistxattr+0x16f/0x230 fs/xattr.c:843 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805848c000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff88805848c000, ffff88805848c400) The buggy address belongs to the physical page: page:ffffea0001612200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58488 head:ffffea0001612200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001eb2400 dead000000000002 ffff888012441dc0 raw: 0000000000000000 0000000080100010 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3564, tgid 3564 (syz-executor.1), ts 67429920645, free_ts 17533940759 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0xa0/0x220 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x135/0x670 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1271 [inline] alloc_uevent_skb+0x74/0x220 lib/kobject_uevent.c:290 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline] kobject_uevent_net_broadcast+0x178/0x560 lib/kobject_uevent.c:412 kobject_uevent_env+0x576/0x8c0 lib/kobject_uevent.c:593 kobject_rename+0x457/0x530 lib/kobject.c:513 device_rename+0x159/0x1a0 drivers/base/core.c:4558 dev_change_name+0x346/0x9a0 net/core/dev.c:1229 do_setlink+0xa72/0x3e30 net/core/rtnetlink.c:2781 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453 free_contig_range+0x9a/0x150 mm/page_alloc.c:9507 destroy_args+0xfe/0x997 mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x416/0x46b mm/debug_vm_pgtable.c:1354 do_one_initcall+0x265/0x8f0 init/main.c:1299 do_initcall_level+0x157/0x207 init/main.c:1372 do_initcalls+0x49/0x86 init/main.c:1388 kernel_init_freeable+0x45c/0x60f init/main.c:1627 kernel_init+0x19/0x290 init/main.c:1515 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88805848c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805848c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805848c200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805848c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805848c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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