hid-generic 0000:0000:0000.0010: unknown main item tag 0x0 hid-generic 0000:0000:0000.0010: hidraw0: HID v0.00 Device [syz1] on syz1 ================================================================== 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 ffff8801bc8d8f18 by task syz-executor2/28520 CPU: 1 PID: 28520 Comm: syz-executor2 Not tainted 4.4.152-ge5c5f1f #89 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 2949abdc401b6e6d ffff8800b6b67728 ffffffff81e15fed ffffea0006f23600 ffff8801bc8d8f18 0000000000000000 ffff8801bc8d8f18 0000000000000000 ffff8800b6b67760 ffffffff8151b489 ffff8801bc8d8f18 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 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xcc/0x110 net/socket.c:648 [] sock_write_iter+0x223/0x3b0 net/socket.c:847 [] new_sync_write fs/read_write.c:478 [inline] [] __vfs_write+0x30d/0x3f0 fs/read_write.c:491 [] vfs_write+0x191/0x4e0 fs/read_write.c:538 [] SYSC_write fs/read_write.c:585 [inline] [] SyS_write+0xd9/0x1c0 fs/read_write.c:577 [] entry_SYSCALL_64_fastpath+0x22/0x9e Allocated by task 28500: [] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63 [] save_stack+0x43/0xd0 mm/kasan/kasan.c:512 [] set_track mm/kasan/kasan.c:524 [inline] [] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616 [] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554 [] slab_post_alloc_hook mm/slub.c:1349 [inline] [] slab_alloc_node mm/slub.c:2615 [inline] [] slab_alloc mm/slub.c:2623 [inline] [] kmem_cache_alloc+0xbe/0x2a0 mm/slub.c:2628 [] dst_alloc+0xb5/0x1a0 net/core/dst.c:210 [] rt_dst_alloc+0x78/0x430 net/ipv4/route.c:1478 [] __mkroute_output net/ipv4/route.c:2132 [inline] [] __ip_route_output_key_hash+0x9ac/0x2380 net/ipv4/route.c:2344 [] __ip_route_output_key include/net/route.h:124 [inline] [] ip_route_output_flow+0x29/0xa0 net/ipv4/route.c:2431 [] ip_route_connect include/net/route.h:304 [inline] [] __ip4_datagram_connect+0x663/0xfe0 net/ipv4/datagram.c:51 [] __ip6_datagram_connect+0x1280/0x1960 net/ipv6/datagram.c:105 [] ip6_datagram_connect+0x2f/0x50 net/ipv6/datagram.c:223 [] inet_dgram_connect+0x117/0x200 net/ipv4/af_inet.c:550 [] SYSC_connect+0x1b8/0x300 net/socket.c:1570 [] SyS_connect+0x24/0x30 net/socket.c:1551 [] entry_SYSCALL_64_fastpath+0x22/0x9e Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801bc8d8dc0 which belongs to the cache ip_dst_cache of size 208 The buggy address is located 136 bytes to the right of 208-byte region [ffff8801bc8d8dc0, ffff8801bc8d8e90) The buggy address belongs to the page: ------------[ cut here ]------------ kernel BUG at include/linux/swapops.h:129! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: -1131573616 Comm: À¼ˆÿÿŽ¼ˆÿÿˆ7¡³ Not tainted 4.4.152-ge5c5f1f #89 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ------------[ cut here ]------------ WARNING: CPU: 0 PID: -1131573616 at include/linux/uaccess.h:15 pagefault_disabled_dec include/linux/uaccess.h:15 [inline]() WARNING: CPU: 0 PID: -1131573616 at include/linux/uaccess.h:15 pagefault_enable include/linux/uaccess.h:42 [inline]() WARNING: CPU: 0 PID: -1131573616 at include/linux/uaccess.h:15 __probe_kernel_read+0x1b9/0x200 mm/maccess.c:35()