loop3: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x910/0xa20 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff8880216a140c by task syz-executor.3/6215 CPU: 3 PID: 6215 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 hfsplus_uni2asc+0x910/0xa20 fs/hfsplus/unicode.c:179 hfsplus_readdir+0x87b/0x1000 fs/hfsplus/dir.c:207 iterate_dir+0x292/0x9e0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64 fs/readdir.c:394 [inline] __ia32_sys_getdents64+0x14f/0x2e0 fs/readdir.c:394 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7307579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ef95ac EFLAGS: 00000292 ORIG_RAX: 00000000000000dc RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020002140 RDX: 0000000000001009 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 6215: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x1f9/0x440 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] hfsplus_find_init+0x95/0x200 fs/hfsplus/bfind.c:21 hfsplus_readdir+0x266/0x1000 fs/hfsplus/dir.c:144 iterate_dir+0x292/0x9e0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64 fs/readdir.c:394 [inline] __ia32_sys_getdents64+0x14f/0x2e0 fs/readdir.c:394 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e The buggy address belongs to the object at ffff8880216a1000 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 [ffff8880216a1000, ffff8880216a140c) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x216a0 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888014c42f00 ffffea0000955a00 dead000000000002 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888014c42f00 ffffea0000955a00 dead000000000002 head: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea000085a801 ffffea000085a848 00000000ffffffff head: 0000000800000000 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 12, tgid 1524891442 (kworker/u32:1), ts 12, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x670/0x16d0 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmalloc_trace+0x2fb/0x330 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] kzalloc include/linux/slab.h:749 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0x78/0x250 drivers/acpi/acpica/dswstate.c:518 acpi_ds_call_control_method+0xeb/0x6c0 drivers/acpi/acpica/dsmethod.c:498 acpi_ps_parse_aml+0x845/0xcb0 drivers/acpi/acpica/psparse.c:503 acpi_ps_execute_method+0x55a/0xb30 drivers/acpi/acpica/psxface.c:190 acpi_ns_evaluate+0x76c/0xca0 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x3eb/0xa70 drivers/acpi/acpica/nsxfeval.c:354 acpi_evaluate_integer+0xde/0x200 drivers/acpi/utils.c:260 acpi_bus_get_status_handle drivers/acpi/bus.c:82 [inline] acpi_bus_get_status+0x19e/0x340 drivers/acpi/bus.c:111 i2c_acpi_do_lookup+0x9c/0x280 drivers/i2c/i2c-core-acpi.c:152 page_owner free stack trace missing Memory state around the buggy address: ffff8880216a1300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880216a1380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880216a1400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880216a1480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880216a1500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi