audit: type=1400 audit(1520461726.303:8): avc: denied { map } for pid=4228 comm="syz-execprog" path="/root/syzkaller-shm409013028" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 IPVS: ftp: loaded support on port[0] = 21 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 4645 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #254 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xa09/0x3e00 kernel/locking/lockdep.c:3310 RSP: 0018:ffff8801b21cf320 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000046 RSI: 0000000000000000 RDI: ffffffff86ec9920 RBP: ffff8801b21cf6b0 R08: ffffffff841cb919 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000230 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b16a8000 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7fceb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000813b029 CR3: 00000001ae437006 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 cma_exch drivers/infiniband/core/cma.c:461 [inline] rdma_destroy_id+0xa9/0xda0 drivers/infiniband/core/cma.c:1660 ucma_destroy_id+0x2e9/0x4c0 drivers/infiniband/core/ucma.c:606 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1627 __vfs_write+0xef/0x970 fs/read_write.c:480 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff3c99 RSP: 002b:00000000f7fce09c EFLAGS: 00000286 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000020000040 RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 81 c4 60 03 00 00 44 89 d0 5b 41 5a 41 5c 41 5d 41 5e 41 5f 5d 49 8d 62 f8 c3 4c 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0a 33 00 00 49 81 3b 60 ed 9f 87 41 bd 00 00 RIP: __lock_acquire+0xa09/0x3e00 kernel/locking/lockdep.c:3310 RSP: ffff8801b21cf320 ---[ end trace a0f86c5f8b1c4ebf ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..