================================================================== BUG: KASAN: slab-out-of-bounds in rmd320_final+0x211/0x250 crypto/rmd320.c:358 Write of size 4 at addr ffff8801b57baee8 by task syz-executor1/11997 CPU: 0 PID: 11997 Comm: syz-executor1 Not tainted 4.17.0+ #106 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+0x242/0x2fe mm/kasan/report.c:412 __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437 rmd320_final+0x211/0x250 crypto/rmd320.c:358 crypto_shash_final+0x104/0x260 crypto/shash.c:152 kdf_ctr security/keys/dh.c:186 [inline] keyctl_dh_compute_kdf security/keys/dh.c:217 [inline] __keyctl_dh_compute+0x1198/0x1be0 security/keys/dh.c:389 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 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:00007fca62178c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fca621796d4 RCX: 0000000000455b29 RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000940 R09: 0000000000000000 R10: 0000000000000184 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd31 R14: 00000000004ceb30 R15: 0000000000000000 Allocated by task 11997: 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+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] keyctl_dh_compute_kdf security/keys/dh.c:211 [inline] __keyctl_dh_compute+0x1000/0x1be0 security/keys/dh.c:389 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10704: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x193/0x560 net/core/skbuff.c:701 netlink_broadcast_filtered+0x6af/0x1630 net/netlink/af_netlink.c:1512 netlink_broadcast net/netlink/af_netlink.c:1534 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0xa0/0x1a0 net/netlink/af_netlink.c:2491 rtnl_notify+0xce/0xf0 net/core/rtnetlink.c:732 inet6_netconf_notify_devconf+0x107/0x1e0 net/ipv6/addrconf.c:589 __addrconf_sysctl_register+0x2b8/0x430 net/ipv6/addrconf.c:6549 addrconf_sysctl_register+0x13c/0x1e0 net/ipv6/addrconf.c:6586 ipv6_add_dev+0xb5d/0x13b0 net/ipv6/addrconf.c:448 addrconf_notify+0x9fb/0x27e0 net/ipv6/addrconf.c:3435 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:1735 call_netdevice_notifiers net/core/dev.c:1753 [inline] register_netdevice+0xb9d/0x11d0 net/core/dev.c:8028 register_netdev+0x30/0x50 net/core/dev.c:8114 loopback_net_init+0x78/0x160 drivers/net/loopback.c:214 ops_init+0x101/0x560 net/core/net_namespace.c:128 setup_net+0x3d9/0x980 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:2419 __do_sys_unshare kernel/fork.c:2487 [inline] __se_sys_unshare kernel/fork.c:2485 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2485 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801b57bad40 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 424 bytes inside of 512-byte region [ffff8801b57bad40, ffff8801b57baf40) The buggy address belongs to the page: page:ffffea0006d5ee80 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006d55108 ffffea00071a57c8 ffff8801da800940 raw: 0000000000000000 ffff8801b57ba0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b57bad80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b57bae00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b57bae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ^ ffff8801b57baf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801b57baf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================