IPVS: ftp: loaded support on port[0] = 21
------------[ cut here ]------------
kernel BUG at drivers/dma-buf/dma-buf.c:68!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7966 Comm: syz-executor638 Not tainted 4.14.275-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888097df6300 task.stack: ffff8880b3460000
RIP: 0010:dma_buf_release+0x313/0x5c0 drivers/dma-buf/dma-buf.c:68
RSP: 0018:ffff8880b3467db8 EFLAGS: 00010297
RAX: ffff888097df6300 RBX: ffff8880b514c800 RCX: 1ffffffff17f627c
RDX: 0000000000000000 RSI: ffff8880b514c800 RDI: ffff88809ab20a78
RBP: ffff88809ab20900 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b514c828
R13: ffff8880b514c87c R14: ffffffff8398b080 R15: ffff8880b514c810
FS:  00005555568b0300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4df277140 CR3: 00000000af06d000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7ff4df1c45a3
RSP: 002b:00007ffcc788e568 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007ff4df1c45a3
RDX: 0000000020000000 RSI: 00000000c00464b4 RDI: 0000000000000003
RBP: 00007ffcc788e578 R08: 00007ff4df273e40 R09: 00007ff4df273e40
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc788e580
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 31 e4 e8 21 49 b4 fd 48 89 ef e8 89 15 e6 fd e8 c4 8e bc fd 44 89 e0 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 ad 8e bc fd <0f> 0b e8 a6 8e bc fd e8 71 6d ad fd 48 8d bd 38 02 00 00 48 b8 
RIP: dma_buf_release+0x313/0x5c0 drivers/dma-buf/dma-buf.c:68 RSP: ffff8880b3467db8
---[ end trace 0dfc979aa52f087f ]---