R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000015 sctp: [Deprecated]: syz-executor3 (pid 26356) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead R13: 00000000004d3160 R14: 00000000004c7de2 R15: 0000000000000006 ================================================================== BUG: KASAN: slab-out-of-bounds in tls_fill_prepend include/net/tls.h:339 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 Write of size 1 at addr ffff88019a6e0000 by task syz-executor2/26325 CPU: 1 PID: 26325 Comm: syz-executor2 Not tainted 4.18.0-rc7+ #37 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_store1_noabort+0x17/0x20 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:339 [inline] tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:276 tls_handle_open_record net/tls/tls_main.c:164 [inline] tls_sk_proto_close+0x74c/0xae0 net/tls/tls_main.c:264 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459 __sock_release+0xd7/0x260 net/socket.c:600 sock_close+0x19/0x20 net/socket.c:1151 __fput+0x355/0x8b0 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x313/0x370 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: 0033:0x4105c1 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:00007fff13e30a90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000014 RCX: 00000000004105c1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000001 R10: 00007fff13e309c0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000042ca1 R14: 00000000000001e4 R15: badc0ffeebadface Allocated by task 12075: 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 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554 getname_flags+0xd0/0x5a0 fs/namei.c:140 user_path_at_empty+0x2d/0x50 fs/namei.c:2584 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_lstat include/linux/fs.h:3107 [inline] __do_sys_newlstat+0x8f/0x110 fs/stat.c:350 __se_sys_newlstat fs/stat.c:344 [inline] __x64_sys_newlstat+0x54/0x80 fs/stat.c:344 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 12075: 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] kmem_cache_free+0x86/0x2d0 mm/slab.c:3756 putname+0xf2/0x130 fs/namei.c:261 filename_lookup+0x397/0x510 fs/namei.c:2330 user_path_at_empty+0x40/0x50 fs/namei.c:2584 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_lstat include/linux/fs.h:3107 [inline] __do_sys_newlstat+0x8f/0x110 fs/stat.c:350 __se_sys_newlstat fs/stat.c:344 [inline] __x64_sys_newlstat+0x54/0x80 fs/stat.c:344 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 ffff88019a6e0880 which belongs to the cache names_cache of size 4096 The buggy address is located 2176 bytes to the left of 4096-byte region [ffff88019a6e0880, ffff88019a6e1880) The buggy address belongs to the page: page:ffffea000669b800 count:1 mapcount:0 mapping:ffff8801dad85dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00067fc708 ffffea000669b888 ffff8801dad85dc0 raw: 0000000000000000 ffff88019a6e0880 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88019a6dff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88019a6dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88019a6e0000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88019a6e0080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88019a6e0100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================