netlink: 2 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor1'. sctp: [Deprecated]: syz-executor6 (pid 15066) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 2 bytes leftover after parsing attributes in process `syz-executor2'. BUG: unable to handle kernel NULL pointer dereference at 00000000000000fc IP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 PGD 0 P4D 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 15076 Comm: modprobe Not tainted 4.15.0-rc4+ #137 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: 0018:ffff8801d1a27990 EFLAGS: 00010246 RAX: ffffffff85f1c620 RBX: 0000000000000282 RCX: 0000000000000000 RDX: ffffea000017c700 RSI: ffffea000017c71f RDI: 0000000000000282 RBP: ffff8801d1a279c8 R08: 1ffff1003a344f00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff85f1c620 R15: ffffffff85ec82a0 FS: 0000000000000000(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000fc CR3: 00000001a0eee001 CR4: 00000000001606f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259 kasan_kmalloc+0xca/0xe0 mm/kasan/kasan.c:536 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3382 [inline] kmem_cache_alloc+0x11b/0x760 mm/slab.c:3542 kmem_cache_zalloc include/linux/slab.h:678 [inline] mmap_region+0x7ee/0x15a0 mm/mmap.c:1673 do_mmap+0x6c0/0xe00 mm/mmap.c:1483 do_mmap_pgoff include/linux/mm.h:2217 [inline] vm_mmap_pgoff+0x1de/0x280 mm/util.c:333 SYSC_mmap_pgoff mm/mmap.c:1533 [inline] SyS_mmap_pgoff+0x23b/0x5f0 mm/mmap.c:1491 SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x7fcfa1df33ea RSP: 002b:00007ffd3705aab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fcfa1ffe1c8 RCX: 00007fcfa1df33ea RDX: 0000000000000003 RSI: 0000000000002000 RDI: 0000000000000000 RBP: 00007ffd3705ac60 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 00007fcfa1ffe758 R13: 0000000000000001 R14: 00007fcfa1ffe030 R15: 0000000000000000 Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 a0 82 ec 85 53 49 89 f4 48 83 ec 10 48 89 7d c8 4d 85 e4 4d 89 e5 0f 84 c8 00 00 00 <49> 63 95 fc 00 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801d1a27990 CR2: 00000000000000fc ---[ end trace 9b60c171931da883 ]---