------------[ cut here ]------------ kernel BUG at lib/list_debug.c:26! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 10565 Comm: syz-executor.4 Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88803f8e8000 task.stack: ffff888070d70000 RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26 RSP: 0018:ffff888070d77b80 EFLAGS: 00010286 RAX: 0000000000000075 RBX: ffff8880a0c2e698 RCX: 0000000000000000 RDX: 000000000000f5c8 RSI: ffffffff814b5755 RDI: ffffed100e1aef66 RBP: ffff888070d77b98 R08: 0000000000000075 R09: ffff88803f8e88a0 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff887af9e0 R13: ffff8880a5a641d8 R14: 0000000000000002 R15: 0000000000000000 FS: 00007f965160d700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f223000 CR3: 0000000068f03000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] cma_listen_on_all drivers/infiniband/core/cma.c:2321 [inline] rdma_listen+0x5a7/0x840 drivers/infiniband/core/cma.c:3319 ucma_listen+0x10e/0x170 drivers/infiniband/core/ucma.c:1078 ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672 __vfs_write+0x105/0x6b0 fs/read_write.c:480 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45b3b9 RSP: 002b:00007f965160cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f965160d6d4 RCX: 000000000045b3b9 RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000c8b R14: 00000000004cd6b1 R15: 000000000075bf2c Code: 0f 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 40 55 04 87 e8 b8 e7 3c fe 0f 0b 48 89 f1 48 c7 c7 c0 54 04 87 4c 89 e6 e8 a4 e7 3c fe <0f> 0b 4c 89 f6 48 c7 c7 60 56 04 87 e8 93 e7 3c fe 0f 0b 4c 89 RIP: __list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26 RSP: ffff888070d77b80 ---[ end trace 500dcaa1c5d26a1a ]---