sd 0:0:1:0: [sg0] tag#936 CDB[00]: f3 90 a5 de 2f b9 63 28 55 e6 57 a9 37 0d 77 16 sd 0:0:1:0: [sg0] tag#936 CDB[10]: 84 13 42 d3 f1 03 33 3e f9 c2 a1 d4 6a ca 7c c0 sd 0:0:1:0: [sg0] tag#936 CDB[20]: b0 3e aa 78 e5 1e cf 01 06 a0 9f ed 6f dd ea d1 sd 0:0:1:0: [sg0] tag#936 CDB[30]: b5 e2 d0 bd 00 d4 fe 29 1f 7d 4e 66 d6 60 b2 6d ================================================================== BUG: KASAN: slab-out-of-bounds in rmd320_final+0x211/0x250 crypto/rmd320.c:358 Write of size 4 at addr ffff8801ac8d5968 by task syz-executor2/24014 CPU: 1 PID: 24014 Comm: syz-executor2 Not tainted 4.18.0-rc1+ #107 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:00007fb841781c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fb8417826d4 RCX: 0000000000455b29 RDX: 0000000020000080 RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020c61fc8 R09: 0000000000000000 R10: 00000000000002e5 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd31 R14: 00000000004ceb30 R15: 0000000000000000 Allocated by task 24014: 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 18507: 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_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x5a8/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfd0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2161 __sys_sendmsg+0x11d/0x290 net/socket.c:2199 __do_sys_sendmsg net/socket.c:2208 [inline] __se_sys_sendmsg net/socket.c:2206 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2206 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 ffff8801ac8d5680 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 744 bytes inside of 1024-byte region [ffff8801ac8d5680, ffff8801ac8d5a80) The buggy address belongs to the page: page:ffffea0006b23500 count:1 mapcount:0 mapping:ffff8801da800ac0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006b5e788 ffffea0007008088 ffff8801da800ac0 raw: 0000000000000000 ffff8801ac8d4000 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ac8d5800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ac8d5880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801ac8d5900: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ^ ffff8801ac8d5980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ac8d5a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================