Use struct sctp_sack_info instead 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: 7598 Comm: cryptomgr_test Not tainted 4.15.0-rc3+ #156 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:crypto_remove_spawns+0x58c/0x1260 crypto/algapi.c:159 RSP: 0018:ffff8801d13a79e8 EFLAGS: 00010206 RAX: 0000000000000003 RBX: dffffc0000000000 RCX: ffffffff8225092b RDX: 0000000000000000 RSI: 1ffff1003a274fa6 RDI: 0000000000000018 RBP: ffff8801d13a7dd8 R08: ffff8801d13a7d70 R09: 0000000000000004 R10: ffff8801d13a7c28 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801bea22e20 R14: ffffed003a274f4e R15: ffff8801d13a7db0 FS: 0000000000000000(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffeec3f3020 CR3: 0000000005e22005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: crypto_alg_tested+0x514/0x6f0 crypto/algapi.c:311 cryptomgr_test+0x17/0x30 crypto/algboss.c:226 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441 Code: 84 e3 01 00 00 e8 f5 cc 4a ff 4c 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 d8 09 00 00 4d 8b 65 00 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 b4 09 00 00 4d 8b 6c 24 18 4c 3b ad 50 fc ff RIP: crypto_remove_spawns+0x58c/0x1260 crypto/algapi.c:159 RSP: ffff8801d13a79e8 ---[ end trace 63a6c167050cf601 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..