netlink: 'syz-executor1': attribute type 5 has an invalid length. netlink: 'syz-executor1': attribute type 5 has an invalid length. ================================================================== BUG: KASAN: slab-out-of-bounds in _autofs_dev_ioctl+0x8f5/0x990 fs/autofs/dev-ioctl.c:670 Read of size 4 at addr ffff8801d7e17880 by task syz-executor7/6680 CPU: 1 PID: 6680 Comm: syz-executor7 Not tainted 4.18.0-rc8+ #183 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 _autofs_dev_ioctl+0x8f5/0x990 fs/autofs/dev-ioctl.c:670 autofs_dev_ioctl+0x1b/0x30 fs/autofs/dev-ioctl.c:704 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb453b54c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb453b556d4 RCX: 0000000000457089 RDX: 0000000020000180 RSI: 800000000000937e RDI: 0000000000000006 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cd018 R14: 00000000004c3d61 R15: 0000000000000000 Allocated by task 6680: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] ramfs_fill_super+0xc4/0x580 fs/ramfs/inode.c:226 mount_nodev+0x6b/0x110 fs/super.c:1220 ramfs_mount+0x2c/0x40 fs/ramfs/inode.c:253 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x581/0x30e0 fs/namespace.c:2848 ksys_mount+0x12d/0x140 fs/namespace.c:3064 __do_sys_mount fs/namespace.c:3078 [inline] __se_sys_mount fs/namespace.c:3075 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 1: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 acpi_add_single_object+0xb57/0x1e90 drivers/acpi/scan.c:1632 acpi_bus_check_add+0x61c/0xb60 drivers/acpi/scan.c:1860 acpi_ns_walk_namespace+0x224/0x400 drivers/acpi/acpica/nswalk.c:237 acpi_walk_namespace+0xf2/0x12c drivers/acpi/acpica/nsxfeval.c:606 acpi_bus_scan+0x146/0x170 drivers/acpi/scan.c:2041 acpi_scan_init+0x403/0x8fe drivers/acpi/scan.c:2198 acpi_init+0x941/0xa19 drivers/acpi/bus.c:1284 do_one_initcall+0x127/0x913 init/main.c:884 do_initcall_level init/main.c:952 [inline] do_initcalls init/main.c:960 [inline] do_basic_setup init/main.c:978 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1135 kernel_init+0x11/0x1b3 init/main.c:1061 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 The buggy address belongs to the object at ffff8801d7e17880 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8801d7e17880, ffff8801d7e178a0) The buggy address belongs to the page: page:ffffea00075f85c0 count:1 mapcount:0 mapping:ffff8801dac001c0 index:0xffff8801d7e17fc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00075f8608 ffffea00075f8508 ffff8801dac001c0 raw: ffff8801d7e17fc1 ffff8801d7e17000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d7e17780: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d7e17800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8801d7e17880: 02 fc fc fc fc fc fc fc 00 fc fc fc fc fc fc fc ^ ffff8801d7e17900: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc ffff8801d7e17980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc ==================================================================