RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000004 RBP: 000000000072bfa0 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 00007f19a57d96d4 R13: 00000000004c3921 R14: 00000000004d57d8 R15: 0000000000000005 ================================================================== BUG: KASAN: slab-out-of-bounds in tls_fill_prepend include/net/tls.h:368 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x10b9/0x1480 net/tls/tls_sw.c:220 Write of size 1 at addr ffff88017ff98000 by task syz-executor1/11931 CPU: 0 PID: 11931 Comm: syz-executor1 Not tainted 4.19.0-rc7+ #58 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: validate_nla: 1 callbacks suppressed netlink: 'syz-executor0': attribute type 1 has an invalid length. __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 nla_parse: 1 callbacks suppressed netlink: 4 bytes leftover after parsing attributes in process `syz-executor0'. print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:368 [inline] tls_push_record+0x10b9/0x1480 net/tls/tls_sw.c:220 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:257 tls_handle_open_record net/tls/tls_main.c:156 [inline] tls_sk_proto_close+0x69c/0xbb0 net/tls/tls_main.c:271 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:457 __sock_release+0xd7/0x250 net/socket.c:579 sock_close+0x19/0x20 net/socket.c:1141 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffe73d04640 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00000000159f87cd R09: 00000000ff455064 R10: 00007ffe73d04570 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000a1 R15: 0000000000000001 Allocated by task 5349: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x730 mm/slab.c:3554 getname_flags+0xd0/0x5a0 fs/namei.c:140 user_path_at_empty+0x2d/0x50 fs/namei.c:2608 do_readlinkat+0x156/0x410 fs/stat.c:394 __do_sys_readlink fs/stat.c:427 [inline] __se_sys_readlink fs/stat.c:424 [inline] __x64_sys_readlink+0x78/0xb0 fs/stat.c:424 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5349: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x83/0x290 mm/slab.c:3756 putname+0xf2/0x130 fs/namei.c:261 filename_lookup+0x39a/0x520 fs/namei.c:2357 user_path_at_empty+0x40/0x50 fs/namei.c:2608 do_readlinkat+0x156/0x410 fs/stat.c:394 __do_sys_readlink fs/stat.c:427 [inline] __se_sys_readlink fs/stat.c:424 [inline] __x64_sys_readlink+0x78/0xb0 fs/stat.c:424 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88017ff986c0 which belongs to the cache names_cache of size 4096 The buggy address is located 1728 bytes to the left of 4096-byte region [ffff88017ff986c0, ffff88017ff996c0) The buggy address belongs to the page: page:ffffea0005ffe600 count:1 mapcount:0 mapping:ffff8801da972c00 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006fdba08 ffffea0005ffe688 ffff8801da972c00 raw: 0000000000000000 ffff88017ff986c0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88017ff97f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88017ff97f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88017ff98000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88017ff98080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88017ff98100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================