================================================================== 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 sha1_base_finish include/crypto/sha1_base.h:102 [inline] BUG: KASAN: slab-out-of-bounds in sha1_final+0x283/0x2e0 crypto/sha1_generic.c:58 Write of size 4 at addr ffff8801d6cb1058 by task syz-executor4/19834 CPU: 1 PID: 19834 Comm: syz-executor4 Not tainted 4.18.0-rc1+ #112 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] sha1_base_finish include/crypto/sha1_base.h:102 [inline] sha1_final+0x283/0x2e0 crypto/sha1_generic.c:58 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:00007f8106acfc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f8106ad06d4 RCX: 0000000000455b29 RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfe04 R14: 00000000004cf058 R15: 0000000000000000 Allocated by task 19834: 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 18265: 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 kvfree+0x61/0x70 mm/util.c:442 xt_free_table_info+0xb7/0x180 net/netfilter/x_tables.c:1202 __do_replace+0x85a/0xac0 net/ipv4/netfilter/ip_tables.c:1090 do_replace net/ipv4/netfilter/ip_tables.c:1143 [inline] do_ipt_set_ctl+0x49c/0x645 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x7d/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x107/0x140 net/ipv4/ip_sockglue.c:1258 tcp_setsockopt+0x93/0xe0 net/ipv4/tcp.c:3049 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3040 __sys_setsockopt+0x1c5/0x3b0 net/socket.c:1947 __do_sys_setsockopt net/socket.c:1958 [inline] __se_sys_setsockopt net/socket.c:1955 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1955 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 ffff8801d6cb1040 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff8801d6cb1040, ffff8801d6cb1060) The buggy address belongs to the page: page:ffffea00075b2c40 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d6cb1fc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0005ed26c8 ffffea00075cec08 ffff8801da8001c0 raw: ffff8801d6cb1fc1 ffff8801d6cb1000 0000000100000036 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d6cb0f00: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff8801d6cb0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d6cb1000: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ^ ffff8801d6cb1080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d6cb1100: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================