kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9088 Comm: syz-executor.4 Not tainted 4.19.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_splice_read+0x140/0xb30 net/ipv4/tcp.c:807
audit: type=1400 audit(1596176468.864:11): avc:  denied  { write } for  pid=9095 comm="syz-executor.1" path="socket:[33789]" dev="sockfs" ino=33789 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a8 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 18 48 8d 7b 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 08 00 00 8b 5b 78 31 ff 45
RSP: 0018:ffff88805e23fc10 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100b45f52f
RDX: 000000000000000f RSI: ffff88805a2fa958 RDI: 0000000000000078
RBP: ffff88808bf48280 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805e23feb0
R13: 0000000000000000 R14: ffff888088f0b080 R15: 0000000000000000
FS:  00007f615b39b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
audit: type=1400 audit(1596176468.864:12): avc:  denied  { name_connect } for  pid=9095 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe9d8be048 CR3: 0000000085bfe000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_splice_read+0x1d1/0x2c0 net/smc/af_smc.c:1855
 sock_splice_read+0xa6/0xe0 net/socket.c:859
 do_splice_to+0x10e/0x160 fs/splice.c:881
 do_splice fs/splice.c:1186 [inline]
 __do_sys_splice fs/splice.c:1428 [inline]
 __se_sys_splice+0x135f/0x16d0 fs/splice.c:1408
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45cc79
Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f615b39ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000032b80 RCX: 000000000045cc79
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000078bf58 R08: 0000000000000009 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffdfb351aaf R14: 00007f615b39b9c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 14596cb7dfdb576b ]---
RIP: 0010:tcp_splice_read+0x140/0xb30 net/ipv4/tcp.c:807
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a8 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 18 48 8d 7b 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 08 00 00 8b 5b 78 31 ff 45
RSP: 0018:ffff88805e23fc10 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100b45f52f
RDX: 000000000000000f RSI: ffff88805a2fa958 RDI: 0000000000000078
RBP: ffff88808bf48280 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805e23feb0
R13: 0000000000000000 R14: ffff888088f0b080 R15: 0000000000000000
FS:  00007f615b39b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000742138 CR3: 0000000085bfe000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400