================================================================== BUG: KASAN: slab-out-of-bounds in ip6_dst_idev include/net/ip6_fib.h:141 [inline] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x177c/0x1a00 net/ipv6/ip6_output.c:237 Read of size 8 at addr ffff8800b50e1c98 by task syz-executor6/6109 CPU: 1 PID: 6109 Comm: syz-executor6 Not tainted 4.4.153-g5e24b4e #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 315958401a4aaef7 ffff8801be137548 ffffffff81e162ed ffffea0002d43840 ffff8800b50e1c98 0000000000000000 ffff8800b50e1c98 0000000000001000 ffff8801be137580 ffffffff8151b4d9 ffff8800b50e1c98 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_address_description+0x6c/0x216 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429 [] ip6_dst_idev include/net/ip6_fib.h:141 [inline] [] ip6_xmit+0x177c/0x1a00 net/ipv6/ip6_output.c:237 [] inet6_csk_xmit+0x245/0x490 net/ipv6/inet6_connection_sock.c:176 [] l2tp_xmit_core net/l2tp/l2tp_core.c:1084 [inline] [] l2tp_xmit_skb+0xb9c/0xe80 net/l2tp/l2tp_core.c:1179 [] pppol2tp_sendmsg+0x4e0/0x7d0 net/l2tp/l2tp_ppp.c:355 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. binder: release 6129:6134 transaction 2 out, still active binder: undelivered TRANSACTION_COMPLETE binder_alloc: binder_alloc_mmap_handler: 6129 20001000-20004000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 6129:6134 ioctl 40046207 0 returned -16 binder_alloc: 6129: binder_alloc_buf, no vma binder: 6129:6139 transaction failed 29189/-3, size 0-0 line 3137 binder: send failed reply for transaction 2, target dead [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xcc/0x110 net/socket.c:648 [] ___sys_sendmsg+0x441/0x880 net/socket.c:1975 [] __sys_sendmmsg+0x1d4/0x2e0 net/socket.c:2053 [] C_SYSC_sendmmsg net/compat.c:728 [inline] [] compat_SyS_sendmmsg+0x32/0x40 net/compat.c:725 [] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline] [] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460 [] sysenter_flags_fixed+0xd/0x1a Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8800b50e1c80 which belongs to the cache ip_dst_cache of size 208 The buggy address is located 24 bytes inside of 208-byte region [ffff8800b50e1c80, ffff8800b50e1d50) The buggy address belongs to the page: PANIC: double fault, error_code: 0x0 CPU: 1 PID: 6109 Comm: syz-executor6 Not tainted 4.4.153-g5e24b4e #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8800b0d96000 task.stack: ffff8801be130000 RIP: 0010:[] [] dump_page_badflags+0x1a/0x70 mm/debug.c:84 RSP: 0018:ffff8800fffffff8 EFLAGS: 00010092 RAX: 0000000000040000 RBX: ffffea0002d43840 RCX: ffffc90005c88000 RDX: 0000000000000000 RSI: ffffffff83aaae60 RDI: ffffea0002d43840 RBP: ffff880100000028 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff858f0274 R12: 0000000000000000 R13: ffffffff83aaae60 R14: ffff8800b50e1c80 R15: ffff8800b50e1d50 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f5778b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff8800ffffffe8 CR3: 00000001d379d000 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: BUG: unable to handle kernel paging request at ffff8800fffffff8 IP: [] show_stack_log_lvl.cold.1+0x73/0x12e arch/x86/kernel/dumpstack_64.c:287 PGD 6330067 PUD 0 Thread overran stack, or stack corrupted Oops: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6109 Comm: syz-executor6 Not tainted 4.4.153-g5e24b4e #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8800b0d96000 task.stack: ffff8801be130000 RIP: 0010:[] [] show_stack_log_lvl.cold.1+0x73/0x12e arch/x86/kernel/dumpstack_64.c:287 RSP: 0018:ffff8801db30ce68 EFLAGS: 00010046 RAX: ffff880100000000 RBX: 0000000000000000 RCX: ffff8801db307fc0 RDX: ffff8800fffffff8 RSI: ffffffff81e75e5b RDI: ffffffff83c15580 RBP: ffff8801db30cec0 R08: ffff8801db2fffc0 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff858f0254 R12: ffffffff841dca7c R13: ffff8801db30cf58 R14: 0000000000000000 R15: ffffffff841dca6a FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f5778b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff8800fffffff8 CR3: 00000001d379d000 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff841dca7c ffff8800b0d96000 315958401a4aaef7 0000000000000001 ffff880100000000 ffff8800fffffff8 ffff8801db30cf58 ffff8800fffffff8 0000000000000040 ffff8800fffffff8 ffff8800b50e1d50 ffff8801db30cf00 Call Trace: <#DF> [] show_regs.cold.2+0xa0/0x124 arch/x86/kernel/dumpstack_64.c:320 [] df_debug+0x1c/0x2d arch/x86/kernel/doublefault.c:80 [] do_double_fault+0x113/0x230 arch/x86/kernel/traps.c:351 [] double_fault+0x2d/0x40 arch/x86/entry/entry_64.S:886 <> Code: 3c 90 2f 00 48 8b 55 c8 48 8b 4d c0 4c 8b 45 b8 44 8b 4d b4 48 8d 42 08 41 f6 c1 03 48 89 45 c8 75 6a 45 85 c9 0f 85 8a 00 00 00 <48> 8b 12 4c 89 e6 48 c7 c7 72 ca 1d 84 44 89 4d b4 4c 89 45 b8 RIP [] show_stack_log_lvl.cold.1+0x73/0x12e arch/x86/kernel/dumpstack_64.c:287 RSP CR2: ffff8800fffffff8 ---[ end trace 992742787ea1d36b ]---