================================================================== BUG: KASAN: slab-out-of-bounds in tls_fill_prepend include/net/tls.h:370 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x10b9/0x1480 net/tls/tls_sw.c:367 Write of size 1 at addr ffff880193ab0000 by task syz-executor2/10411 CPU: 1 PID: 10411 Comm: syz-executor2 Not tainted 4.19.0-rc4+ #223 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+0x1c4/0x2b4 lib/dump_stack.c:113 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:370 [inline] tls_push_record+0x10b9/0x1480 net/tls/tls_sw.c:367 netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length. tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:404 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:458 __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: 0033:0x410e91 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:00007fff6bb6c7f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000410e91 RDX: 0000001b31b20000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 00007fff6bb6c720 R11: 0000000000000293 R12: 000000000000000a R13: 000000000002b7e4 R14: 0000000000000088 R15: badc0ffeebadface Allocated by task 5309: 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 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_stat include/linux/fs.h:3124 [inline] __do_sys_newstat+0x8f/0x110 fs/stat.c:337 __se_sys_newstat fs/stat.c:333 [inline] __x64_sys_newstat+0x54/0x80 fs/stat.c:333 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5309: 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 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_stat include/linux/fs.h:3124 [inline] __do_sys_newstat+0x8f/0x110 fs/stat.c:337 __se_sys_newstat fs/stat.c:333 [inline] __x64_sys_newstat+0x54/0x80 fs/stat.c:333 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 ffff880193ab0c80 which belongs to the cache names_cache of size 4096 The buggy address is located 3200 bytes to the left of 4096-byte region [ffff880193ab0c80, ffff880193ab1c80) The buggy address belongs to the page: page:ffffea00064eac00 count:1 mapcount:0 mapping:ffff8801da972d80 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006697708 ffffea00064eac88 ffff8801da972d80 raw: 0000000000000000 ffff880193ab0c80 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff880193aaff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880193aaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff880193ab0000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff880193ab0080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880193ab0100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================