================================================================== BUG: KASAN: slab-out-of-bounds in put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] BUG: KASAN: slab-out-of-bounds in sha256_base_finish include/crypto/sha256_base.h:124 [inline] BUG: KASAN: slab-out-of-bounds in sha256_finup+0x4bf/0x540 arch/x86/crypto/sha256_ssse3_glue.c:80 Write of size 4 at addr ffff8801ca631020 by task syz-executor4/10481 CPU: 1 PID: 10481 Comm: syz-executor4 Not tainted 4.18.0-rc1+ #113 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 put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] sha256_base_finish include/crypto/sha256_base.h:124 [inline] sha256_finup+0x4bf/0x540 arch/x86/crypto/sha256_ssse3_glue.c:80 sha256_avx_finup arch/x86/crypto/sha256_ssse3_glue.c:161 [inline] sha256_avx_final+0x28/0x30 arch/x86/crypto/sha256_ssse3_glue.c:166 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:00007f0021cacc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f0021cad6d4 RCX: 0000000000455b29 RDX: 0000000020000200 RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000240 R09: 0000000000000000 R10: 0000000000000247 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfe04 R14: 00000000004cf058 R15: 0000000000000000 Allocated by task 10481: 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 9527: 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_rt_notify+0x204/0x2c0 net/ipv6/route.c:4966 fib6_del_route net/ipv6/ip6_fib.c:1762 [inline] fib6_del+0xf4d/0x1310 net/ipv6/ip6_fib.c:1789 fib6_clean_node+0x3ee/0x5e0 net/ipv6/ip6_fib.c:1950 fib6_walk_continue+0x4b1/0x8e0 net/ipv6/ip6_fib.c:1873 fib6_walk+0x95/0xf0 net/ipv6/ip6_fib.c:1921 fib6_clean_tree+0x1ea/0x360 net/ipv6/ip6_fib.c:1998 __fib6_clean_all+0x21c/0x420 net/ipv6/ip6_fib.c:2014 fib6_clean_all+0x27/0x30 net/ipv6/ip6_fib.c:2025 rt6_sync_down_dev net/ipv6/route.c:4062 [inline] rt6_disable_ip+0x111/0x7e0 net/ipv6/route.c:4067 addrconf_ifdown+0x16f/0x1670 net/ipv6/addrconf.c:3649 addrconf_notify+0x6e9/0x27f0 net/ipv6/addrconf.c:3574 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] __dev_notify_flags+0x29b/0x480 net/core/dev.c:7031 dev_change_flags+0xfd/0x150 net/core/dev.c:7065 devinet_ioctl+0xe4a/0x1d90 net/ipv4/devinet.c:1092 inet_ioctl+0x18b/0x360 net/ipv4/af_inet.c:954 packet_ioctl+0x242/0x370 net/packet/af_packet.c:4072 sock_do_ioctl+0xe4/0x3e0 net/socket.c:973 sock_ioctl+0x30d/0x680 net/socket.c:1097 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 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 ffff8801ca630dc0 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 608 bytes inside of 1024-byte region [ffff8801ca630dc0, ffff8801ca6311c0) The buggy address belongs to the page: page:ffffea0007298c00 count:1 mapcount:0 mapping:ffff8801da800ac0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0007156e08 ffffea000748d908 ffff8801da800ac0 raw: 0000000000000000 ffff8801ca630040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ca630f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ca630f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801ca631000: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801ca631080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ca631100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================