================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff88801c68740c by task syz.3.1169/11562 CPU: 1 UID: 0 PID: 11562 Comm: syz.3.1169 Not tainted 6.10.0-rc6-next-20240703-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 hfsplus_readdir+0x93b/0x1320 fs/hfsplus/dir.c:207 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efe4a975bd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efe4b7f3048 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007efe4ab03f60 RCX: 00007efe4a975bd9 RDX: 0000000000001009 RSI: 0000000020002140 RDI: 000000000000000b RBP: 00007efe4a9e4aa1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007efe4ab03f60 R15: 00007ffef8f67fd8 Allocated by task 11562: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4170 kmalloc_noprof include/linux/slab.h:684 [inline] hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_readdir+0x20e/0x1320 fs/hfsplus/dir.c:144 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801c687000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes to the right of allocated 1036-byte region [ffff88801c687000, ffff88801c68740c) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c680 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015042000 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015042000 0000000000000000 dead000000000001 head: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea000071a001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 1, tgid 1 (swapper/0), ts 3324720807, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2ccb/0x2d80 mm/page_alloc.c:3480 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4738 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2300 allocate_slab+0x5a/0x2f0 mm/slub.c:2463 new_slab mm/slub.c:2516 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3702 __slab_alloc+0x58/0xa0 mm/slub.c:3792 __slab_alloc_node mm/slub.c:3845 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:680 [inline] kzalloc_noprof include/linux/slab.h:806 [inline] acpi_ds_create_walk_state+0x103/0x2a0 drivers/acpi/acpica/dswstate.c:518 acpi_ds_execute_arguments+0x1f9/0x2c0 drivers/acpi/acpica/dsargs.c:107 acpi_ns_init_one_package drivers/acpi/acpica/nsinit.c:279 [inline] acpi_ns_init_one_object+0x1ca/0x3f0 drivers/acpi/acpica/nsinit.c:403 acpi_ns_walk_namespace+0x294/0x4f0 acpi_walk_namespace+0xeb/0x130 drivers/acpi/acpica/nsxfeval.c:606 acpi_ns_initialize_objects+0xa0/0x120 drivers/acpi/acpica/nsinit.c:71 acpi_load_tables+0x95/0x100 drivers/acpi/acpica/tbxfload.c:79 acpi_bus_init+0x9e/0xbc0 drivers/acpi/bus.c:1340 page_owner free stack trace missing Memory state around the buggy address: ffff88801c687300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801c687380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801c687400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801c687480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801c687500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================