================================================================== BUG: KASAN: slab-out-of-bounds in rmd160_final+0x211/0x250 crypto/rmd160.c:334 Write of size 4 at addr ffff8801d77f4158 by task syz-executor7/15613 FAT-fs (loop2): Directory bread(block 128) failed CPU: 0 PID: 15613 Comm: syz-executor7 Not tainted 4.18.0-rc2+ #117 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 FAT-fs (loop2): Directory bread(block 129) failed 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 rmd160_final+0x211/0x250 crypto/rmd160.c:334 FAT-fs (loop2): Directory bread(block 130) failed crypto_shash_final+0x104/0x260 crypto/shash.c:152 FAT-fs (loop2): Directory bread(block 131) failed 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 FAT-fs (loop2): Directory bread(block 132) failed FAT-fs (loop2): Directory bread(block 133) failed 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 FAT-fs (loop2): Directory bread(block 134) failed do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FAT-fs (loop2): Directory bread(block 135) failed entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a99 Code: 1d ba fb ff c3 66 2e 0f 1f 84 FAT-fs (loop2): Directory bread(block 136) failed 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 FAT-fs (loop2): Directory bread(block 137) failed 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 FAT-fs (loop0): invalid media value (0x30) <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 FAT-fs (loop0): Can't find a valid FAT filesystem 00 00 00 RSP: 002b:00007f52fca91c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f52fca926d4 RCX: 0000000000455a99 RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000 Allocated by task 15613: 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 8539: 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 __vunmap+0x326/0x460 mm/vmalloc.c:1529 vfree+0x68/0x100 mm/vmalloc.c:1593 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:886 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1044 [inline] do_ip6t_get_ctl+0xa52/0xc30 net/ipv6/netfilter/ip6_tables.c:1712 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x80/0xe0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1f0/0x320 net/ipv6/ipv6_sockglue.c:1370 tcp_getsockopt+0x93/0xe0 net/ipv4/tcp.c:3534 sock_common_getsockopt+0x9a/0xe0 net/core/sock.c:2999 __sys_getsockopt+0x1ad/0x390 net/socket.c:1984 __do_sys_getsockopt net/socket.c:1995 [inline] __se_sys_getsockopt net/socket.c:1992 [inline] __x64_sys_getsockopt+0xbe/0x150 net/socket.c:1992 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 ffff8801d77f4140 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff8801d77f4140, ffff8801d77f4160) The buggy address belongs to the page: page:ffffea00075dfd00 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d77f4fc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00075a4648 ffffea00075bf288 ffff8801da8001c0 raw: ffff8801d77f4fc1 ffff8801d77f4000 0000000100000009 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d77f4000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d77f4080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8801d77f4100: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ^ ffff8801d77f4180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d77f4200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================