RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe5b5b446d4
R13: 00000000004c5632 R14: 00000000004d8fb8 R15: 00000000ffffffff
ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
==================================================================
BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x9a/0xc0 lib/usercopy.c:27
Read of size 337 at addr ffff8801c6677ffd by task syz-executor1/12424

CPU: 0 PID: 12424 Comm: syz-executor1 Not tainted 4.14.77+ #21
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 print_address_description+0x60/0x22b mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.6+0x11b/0x2dd mm/kasan/report.c:409
 _copy_to_user+0x9a/0xc0 lib/usercopy.c:27
 copy_to_user include/linux/uaccess.h:155 [inline]
 bpf_test_finish.isra.0+0xc8/0x190 net/bpf/test_run.c:59
 bpf_prog_test_run_skb+0x4d0/0x8c0 net/bpf/test_run.c:144
 bpf_prog_test_run kernel/bpf/syscall.c:1330 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1602 [inline]
 SyS_bpf+0x79d/0x3640 kernel/bpf/syscall.c:1547
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007f8f0d7e9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000028 RSI: 0000000020000180 RDI: 000000000000000a
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8f0d7ea6d4
R13: 00000000004bd892 R14: 00000000004cc208 R15: 00000000ffffffff

Allocated by task 11654:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc.part.1+0x4f/0xd0 mm/kasan/kasan.c:551
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc_node mm/slub.c:2723 [inline]
 slab_alloc mm/slub.c:2731 [inline]
 kmem_cache_alloc+0xe4/0x2b0 mm/slub.c:2736
 getname_flags+0xc4/0x540 fs/namei.c:138
 getname fs/namei.c:209 [inline]
 user_path_create fs/namei.c:3713 [inline]
 SYSC_symlinkat fs/namei.c:4187 [inline]
 SyS_symlinkat+0xb0/0x1e0 fs/namei.c:4174
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 11654:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xac/0x190 mm/kasan/kasan.c:524
 slab_free_hook mm/slub.c:1389 [inline]
 slab_free_freelist_hook mm/slub.c:1410 [inline]
 slab_free mm/slub.c:2966 [inline]
 kmem_cache_free+0x12d/0x350 mm/slub.c:2988
 putname+0xcf/0x100 fs/namei.c:259
 filename_create+0x1f5/0x450 fs/namei.c:3678
 user_path_create fs/namei.c:3713 [inline]
 SYSC_symlinkat fs/namei.c:4187 [inline]
 SyS_symlinkat+0xc2/0x1e0 fs/namei.c:4174
warn_alloc_show_mem: 1 callbacks suppressed
Mem-Info:
active_anon:112257 inactive_anon:47302 isolated_anon:0
 active_file:32575 inactive_file:17971 isolated_file:0
 unevictable:0 dirty:243 writeback:0 unstable:0
 slab_reclaimable:8632 slab_unreclaimable:63732
 mapped:55358 shmem:3889 pagetables:11637 bounce:0
 free:1279822 free_pcp:474 free_cma:0
Node 0 active_anon:449028kB inactive_anon:189208kB active_file:130300kB inactive_file:71884kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:221432kB dirty:972kB writeback:0kB shmem:15556kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
DMA32 free:3011420kB min:4684kB low:7692kB high:10700kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3145324kB managed:3012148kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:728kB local_pcp:700kB free_cma:0kB
lowmem_reserve[]: 0 3505 3505
Normal free:2107868kB min:5588kB low:9176kB high:12764kB active_anon:449028kB inactive_anon:189208kB active_file:130300kB inactive_file:71884kB unevictable:0kB writepending:972kB present:4718592kB managed:3589240kB mlocked:0kB kernel_stack:18592kB pagetables:46548kB bounce:0kB free_pcp:1168kB local_pcp:724kB free_cma:0kB
lowmem_reserve[]: 0 0 0
DMA32: 5*4kB (UM) 3*8kB (M) 3*16kB (M) 2*32kB (UM) 5*64kB (UM) 3*128kB (UM) 4*256kB (UM) 2*512kB (M) 2*1024kB (UM) 4*2048kB (UM) 732*4096kB (M) = 3011420kB
Normal: 337*4kB (ME) 269*8kB (UME) 294*16kB (UME) 203*32kB (UME) 180*64kB (UME) 163*128kB (UME) 200*256kB (UME) 145*512kB (UE) 42*1024kB (U) 62*2048kB (UE) 431*4096kB (UM) = 2107884kB
54428 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
315632 pages reserved
SELinux:  policydb magic number 0xa does not match expected magic number 0xf97cff8c
SELinux: failed to load policy
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8801c6676600
 which belongs to the cache names_cache of size 4096
The buggy address is located 2557 bytes to the right of
 4096-byte region [ffff8801c6676600, ffff8801c6677600)
The buggy address belongs to the page:
page:ffffea0007199c00 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
flags: 0x4000000000008100(slab|head)
raw: 4000000000008100 0000000000000000 0000000000000000 0000000100070007
raw: dead000000000100 dead000000000200 ffff8801da97e000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c6677e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
syz-executor4: vmalloc: allocation failure: 0 bytes, mode:0x14000c0(GFP_KERNEL), nodemask=(null)
CPU: 1 PID: 12414 Comm: syz-executor4 Not tainted 4.14.77+ #21
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 warn_alloc.cold.35+0x9d/0x1b7 mm/page_alloc.c:3260
 __vmalloc_node_range+0x390/0x680 mm/vmalloc.c:1776
 __vmalloc_node mm/vmalloc.c:1805 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1819 [inline]
 vmalloc+0x63/0x80 mm/vmalloc.c:1841
 sel_write_load+0x1b5/0x1000 security/selinux/selinuxfs.c:495
 __vfs_write+0xf4/0x5c0 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:546
 SYSC_write fs/read_write.c:593 [inline]
 SyS_write+0xc2/0x1a0 fs/read_write.c:585
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007fe5b5b43c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 000000000000000b
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe5b5b446d4
R13: 00000000004c5632 R14: 00000000004d8fb8 R15: 00000000ffffffff
 ffff8801c6677f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801c6677f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff8801c6678000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c6678080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!