RDX: 000000000000001c RSI: 0000000020419000 RDI: 0000000000000014
RBP: 00007f376507aa90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a
R13: 00007f376507abc8 R14: 00000000004b767a R15: 0000000000000000
==================================================================
BUG: KASAN: slab-out-of-bounds in cap_convert_nscap+0x501/0x610 security/commoncap.c:498
Read of size 4 at addr ffff8801dae09e40 by task syz-executor2/6052
could not allocate digest TFM handle %M¨B]”|«Ž¨ƒ†Zkb

CPU: 1 PID: 6052 Comm: syz-executor2 Not tainted 4.15.0-rc4-next-20171221+ #78
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 cap_convert_nscap+0x501/0x610 security/commoncap.c:498
 setxattr+0x365/0x400 fs/xattr.c:446
 SYSC_fsetxattr fs/xattr.c:508 [inline]
 SyS_fsetxattr+0x130/0x190 fs/xattr.c:497
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452ac9
RSP: 002b:00007f6266644c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007f6266645700 RCX: 0000000000452ac9
RDX: 0000000020002fff RSI: 0000000020005fec RDI: 0000000000000013
RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007f62666459c0 R15: 0000000000000000

Allocated by task 6052:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3673 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3680
 kmalloc_node include/linux/slab.h:558 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:541 [inline]
 setxattr+0x152/0x400 fs/xattr.c:435
 SYSC_fsetxattr fs/xattr.c:508 [inline]
 SyS_fsetxattr+0x130/0x190 fs/xattr.c:497
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 1:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3489 [inline]
 kfree+0xd6/0x260 mm/slab.c:3804
 acpi_os_free include/acpi/platform/aclinuxex.h:96 [inline]
 acpi_ns_get_node_unlocked+0x294/0x2ca drivers/acpi/acpica/nsutils.c:732
 acpi_ns_get_node+0x44/0x62 drivers/acpi/acpica/nsutils.c:772
 acpi_ns_evaluate+0xc8/0x8d3 drivers/acpi/acpica/nseval.c:103
 acpi_ut_evaluate_object+0x122/0x3c4 drivers/acpi/acpica/uteval.c:94
 acpi_ut_execute_CLS+0x12b/0x55a drivers/acpi/acpica/utids.c:385
 acpi_get_object_info+0x469/0xc6c drivers/acpi/acpica/nsxfname.c:350
 acpi_set_pnp_ids drivers/acpi/scan.c:1246 [inline]
 acpi_init_device_object+0xfe8/0x1b70 drivers/acpi/scan.c:1558
 acpi_add_single_object+0x1ca/0x1d80 drivers/acpi/scan.c:1590
 acpi_bus_check_add+0x380/0xa50 drivers/acpi/scan.c:1830
 acpi_ns_walk_namespace+0x1d1/0x31e drivers/acpi/acpica/nswalk.c:270
 acpi_walk_namespace+0xb5/0xef drivers/acpi/acpica/nsxfeval.c:641
 acpi_bus_scan+0x120/0x150 drivers/acpi/scan.c:2011
 acpi_scan_init+0x3ce/0x848 drivers/acpi/scan.c:2168
 acpi_init+0x830/0x8e6 drivers/acpi/bus.c:1246
 do_one_initcall+0xad/0x357 init/main.c:832
 do_initcall_level init/main.c:898 [inline]
 do_initcalls init/main.c:906 [inline]
 do_basic_setup init/main.c:924 [inline]
 kernel_init_freeable+0x469/0x521 init/main.c:1072
 kernel_init+0x13/0x172 init/main.c:999
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524

The buggy address belongs to the object at ffff8801dae09e40
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff8801dae09e40, ffff8801dae09e60)
The buggy address belongs to the page:
page:000000001613c678 count:1 mapcount:0 mapping:000000006c15465e index:0xffff8801dae09fc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801dae09000 ffff8801dae09fc1 000000010000003f
raw: ffffea000709bd20 ffffea0007570760 ffff8801dac001c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801dae09d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801dae09d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801dae09e00: fb fb fb fb fc fc fc fc 01 fc fc fc fc fc fc fc
                                           ^
 ffff8801dae09e80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
 ffff8801dae09f00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================