RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000005 R08: 0000000100000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402000 R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:348 [inline] BUG: KASAN: slab-out-of-bounds in memcpy_dir crypto/scatterwalk.c:28 [inline] BUG: KASAN: slab-out-of-bounds in scatterwalk_copychunks+0x269/0x6a0 crypto/scatterwalk.c:43 Read of size 4094 at addr ffff8880915da000 by task syz-executor780/7867 CPU: 0 PID: 7867 Comm: syz-executor780 Not tainted 4.19.53+ #25 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:348 [inline] memcpy_dir crypto/scatterwalk.c:28 [inline] scatterwalk_copychunks+0x269/0x6a0 crypto/scatterwalk.c:43 scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline] scatterwalk_map_and_copy+0x14d/0x1d0 crypto/scatterwalk.c:60 gcmaes_encrypt.constprop.0+0x762/0xd90 arch/x86/crypto/aesni-intel_glue.c:956 generic_gcmaes_encrypt+0x108/0x159 arch/x86/crypto/aesni-intel_glue.c:1297 crypto_aead_encrypt include/crypto/aead.h:335 [inline] gcmaes_wrapper_encrypt+0x15f/0x200 arch/x86/crypto/aesni-intel_glue.c:1130 crypto_aead_encrypt include/crypto/aead.h:335 [inline] tls_do_encryption net/tls/tls_sw.c:193 [inline] tls_push_record+0x9c0/0x13a0 net/tls/tls_sw.c:228 tls_sw_sendpage+0x540/0xd40 net/tls/tls_sw.c:583 inet_sendpage+0x168/0x630 net/ipv4/af_inet.c:815 kernel_sendpage+0x92/0xf0 net/socket.c:3377 sock_sendpage+0x8b/0xc0 net/socket.c:847 pipe_to_sendpage+0x296/0x360 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x391/0x7d0 fs/splice.c:627 splice_from_pipe+0x108/0x170 fs/splice.c:662 generic_splice_sendpage+0x3c/0x50 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0x642/0x12c0 fs/splice.c:1148 __do_sys_splice fs/splice.c:1415 [inline] __se_sys_splice fs/splice.c:1395 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1395 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440719 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffece804408 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007ffece804420 RCX: 0000000000440719 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000005 R08: 0000000100000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402000 R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 6780: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x700 mm/slab.c:3559 getname_flags fs/namei.c:140 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:129 getname+0x1a/0x20 fs/namei.c:211 do_sys_open+0x2c9/0x550 fs/open.c:1063 __do_sys_open fs/open.c:1087 [inline] __se_sys_open fs/open.c:1082 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1082 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6780: save_stack+0x45/0xd0 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:3503 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3765 putname+0xef/0x130 fs/namei.c:261 do_sys_open+0x318/0x550 fs/open.c:1078 __do_sys_open fs/open.c:1087 [inline] __se_sys_open fs/open.c:1082 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1082 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880915daa00 which belongs to the cache names_cache of size 4096 The buggy address is located 2560 bytes to the left of 4096-byte region [ffff8880915daa00, ffff8880915dba00) The buggy address belongs to the page: page:ffffea0002457680 count:1 mapcount:0 mapping:ffff88821bc45b00 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000008100(slab|head) raw: 01fffc0000008100 ffffea00023b7388 ffffea0002457808 ffff88821bc45b00 raw: 0000000000000000 ffff8880915daa00 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880915d9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880915d9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880915da000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880915da080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880915da100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================