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
kobject: 'loop0' (00000000146e84fc): kobject_uevent_env
CPU: 1 PID: 6563 Comm: syz-executor1 Not tainted 4.20.0-rc6+ #241
kobject: 'loop0' (00000000146e84fc): fill_kobj_path: path = '/devices/virtual/block/loop0'
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_splice_read+0x1fd/0xf90 net/ipv4/tcp.c:799
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e5 0a 00 00 45 8b 6d 78 31 ff
RSP: 0018:ffff8881b369fa58 EFLAGS: 00010206
------------[ cut here ]------------
RAX: dffffc0000000000 RBX: ffff8881b369fbb0 RCX: 1ffff11032c44d9e
downgrading a read lock
WARNING: CPU: 0 PID: 6568 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline]
WARNING: CPU: 0 PID: 6568 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819
RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078
Kernel panic - not syncing: panic_on_warn set ...
RBP: ffff8881b369fbd8 R08: ffff888196226cf0 R09: 0000000000000006
R10: 0000000000000000 R11: ffff888196226400 R12: ffff888193229240
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881b369fd58
FS:  00007fb61ca03700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000930004 CR3: 00000001d48e3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_splice_read+0x265/0x380 net/smc/af_smc.c:1852
 sock_splice_read+0xba/0x110 net/socket.c:858
 do_splice_to+0x12e/0x190 fs/splice.c:880
 do_splice+0x1014/0x1430 fs/splice.c:1178
 __do_sys_splice fs/splice.c:1419 [inline]
 __se_sys_splice fs/splice.c:1399 [inline]
 __x64_sys_splice+0x2c1/0x330 fs/splice.c:1399
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457669
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb61ca02c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457669
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000072bf00 R08: 0000000000010009 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb61ca036d4
R13: 00000000004c5ae3 R14: 00000000004d97b0 R15: 00000000ffffffff
Modules linked in:
Kernel Offset: disabled
Rebooting in 86400 seconds..