loop0: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x576/0x11f0 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff88807e1ab40c by task syz-executor238/3544 CPU: 1 PID: 3544 Comm: syz-executor238 Not tainted 6.1.69-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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_readdir+0x922/0x12c0 fs/hfsplus/dir.c:207 iterate_dir+0x224/0x560 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdba861a649 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff085acd08 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fff085aced8 RCX: 00007fdba861a649 RDX: 0000000000000067 RSI: 0000000020000540 RDI: 0000000000000003 RBP: 00007fdba868d610 R08: 0000000000000651 R09: 00007fff085aced8 R10: 00007fff085acbc0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff085acec8 R14: 0000000000000001 R15: 0000000000000001 Allocated by task 3544: 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:558 [inline] hfsplus_find_init+0x81/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_readdir+0x207/0x12c0 fs/hfsplus/dir.c:144 iterate_dir+0x224/0x560 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807e1ab000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1036 bytes inside of 2048-byte region [ffff88807e1ab000, ffff88807e1ab800) The buggy address belongs to the physical page: page:ffffea0001f86a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e1a8 head:ffffea0001f86a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888012442000 raw: 0000000000000000 0000000080080008 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 3216, tgid 3216 (dhcpcd), ts 54669778115, free_ts 54635492407 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:5545 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+0xa1/0x230 mm/slab_common.c:968 kmalloc include/linux/slab.h:558 [inline] sk_prot_alloc+0xe0/0x200 net/core/sock.c:2038 sk_alloc+0x36/0x350 net/core/sock.c:2091 __netlink_create+0x6b/0x2c0 net/netlink/af_netlink.c:647 netlink_create+0x3aa/0x540 net/netlink/af_netlink.c:710 __sock_create+0x488/0x910 net/socket.c:1537 sock_create net/socket.c:1588 [inline] __sys_socket_create net/socket.c:1625 [inline] __sys_socket+0x136/0x3a0 net/socket.c:1653 __do_sys_socket net/socket.c:1666 [inline] __se_sys_socket net/socket.c:1664 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1664 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 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_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586 put_cpu_partial+0x17b/0x250 mm/slub.c:2662 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422 getname_flags+0xb8/0x4f0 fs/namei.c:139 do_sys_openat2+0xd2/0x500 fs/open.c:1312 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807e1ab300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807e1ab380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807e1ab400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807e1ab480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e1ab500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================