loop5: p3 start 201 is beyond EOD, truncated loop5: p4 start 301 is beyond EOD, truncated ================================================================== BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:188 [inline] BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:203 [inline] BUG: KASAN: slab-out-of-bounds in shrink_slab_memcg mm/vmscan.c:595 [inline] BUG: KASAN: slab-out-of-bounds in shrink_slab+0xa04/0xa60 mm/vmscan.c:671 Read of size 8 at addr ffff880183dc0e98 by task syz-executor1/27410 CPU: 1 PID: 27410 Comm: syz-executor1 Not tainted 4.18.0-rc4-next-20180713+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __read_once_size include/linux/compiler.h:188 [inline] list_empty include/linux/list.h:203 [inline] shrink_slab_memcg mm/vmscan.c:595 [inline] shrink_slab+0xa04/0xa60 mm/vmscan.c:671 shrink_node+0x429/0x16a0 mm/vmscan.c:2735 shrink_zones mm/vmscan.c:2964 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026 try_to_free_mem_cgroup_pages+0x49d/0xc90 mm/vmscan.c:3324 memory_high_write+0x283/0x310 mm/memcontrol.c:5611 cgroup_file_write+0x31f/0x840 kernel/cgroup/cgroup.c:3502 kernfs_fop_write+0x2ba/0x480 fs/kernfs/file.c:316 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ab9 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fae4435ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fae4435b6d4 RCX: 0000000000455ab9 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c2cae R14: 00000000004d4cc8 R15: 0000000000000000 Allocated by task 21911: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc_track_caller+0x14a/0x760 mm/slab.c:3733 kmemdup+0x24/0x50 mm/util.c:118 kmemdup include/linux/string.h:418 [inline] __devinet_sysctl_register+0xa5/0x2b0 net/ipv4/devinet.c:2312 devinet_sysctl_register+0x163/0x220 net/ipv4/devinet.c:2364 inetdev_init+0x2dc/0x590 net/ipv4/devinet.c:264 inetdev_event+0xf45/0x1370 net/ipv4/devinet.c:1468 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1734 call_netdevice_notifiers net/core/dev.c:1752 [inline] register_netdevice+0xb9d/0x1100 net/core/dev.c:8458 register_netdev+0x30/0x50 net/core/dev.c:8544 ip6_tnl_init_net+0x6b3/0xa70 net/ipv6/ip6_tunnel.c:2239 ops_init+0x101/0x560 net/core/net_namespace.c:128 setup_net+0x36c/0x900 net/core/net_namespace.c:313 copy_net_ns+0x2b8/0x4d0 net/core/net_namespace.c:436 create_new_namespaces+0x6ad/0x900 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x723/0xfb0 kernel/fork.c:2433 __do_sys_unshare kernel/fork.c:2501 [inline] __se_sys_unshare kernel/fork.c:2499 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2499 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff880183dc0540 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 2392 bytes inside of 4096-byte region [ffff880183dc0540, ffff880183dc1540) The buggy address belongs to the page: page:ffffea00060f7000 count:1 mapcount:0 mapping:ffff8801da800dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00066ea788 ffffea00060f7088 ffff8801da800dc0 raw: 0000000000000000 ffff880183dc0540 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff880183dc0d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880183dc0e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff880183dc0e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff880183dc0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880183dc0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================