audit: type=1400 audit(1521187826.678:7): avc: denied { map } for pid=4225 comm="syzkaller543705" path="/root/syzkaller543705886" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 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: 4324 Comm: syzkaller543705 Not tainted 4.16.0-rc5+ #355 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:ffff8801c63e7370 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000046 RSI: 0000000000000000 RDI: ffffffff86ec9be0 RBP: ffff8801c63e7700 R08: ffffffff841cd829 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000230 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b0aca380 FS: 00007fdb6e8ae700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb6e8ade78 CR3: 00000001b30a3005 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:1633 __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_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44a6a9 RSP: 002b:00007fdb6e8adda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000006e29fc RCX: 000000000044a6a9 RDX: 0000000000000018 RSI: 0000000020000100 RDI: 0000000000000006 RBP: 00000000006e29f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 006d635f616d6472 R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000005 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 a0 ed 9f 87 41 bd 00 00 RIP: __lock_acquire+0xa09/0x3e00 kernel/locking/lockdep.c:3310 RSP: ffff8801c63e7370 ---[ end trace 116f54146eb2e2dd ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..