================================================================== BUG: KASAN: slab-out-of-bounds in __tipc_nl_add_nametable_publ net/tipc/name_table.c:815 [inline] BUG: KASAN: slab-out-of-bounds in __tipc_nl_service_range_list net/tipc/name_table.c:885 [inline] BUG: KASAN: slab-out-of-bounds in tipc_nl_service_list net/tipc/name_table.c:926 [inline] BUG: KASAN: slab-out-of-bounds in tipc_nl_name_table_dump+0x15c4/0x1720 net/tipc/name_table.c:960 Read of size 4 at addr ffff888061d11778 by task syz-executor.2/7028 CPU: 1 PID: 7028 Comm: syz-executor.2 Not tainted 5.1.0-rc4+ #168 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131 __tipc_nl_add_nametable_publ net/tipc/name_table.c:815 [inline] __tipc_nl_service_range_list net/tipc/name_table.c:885 [inline] tipc_nl_service_list net/tipc/name_table.c:926 [inline] tipc_nl_name_table_dump+0x15c4/0x1720 net/tipc/name_table.c:960 __tipc_nl_compat_dumpit.isra.0+0x220/0x930 net/tipc/netlink_compat.c:206 tipc_nl_compat_dumpit+0x209/0x4d0 net/tipc/netlink_compat.c:286 tipc_nl_compat_handle net/tipc/netlink_compat.c:1243 [inline] tipc_nl_compat_recv+0x34f/0xb30 net/tipc/netlink_compat.c:1281 genl_family_rcv_msg+0x6e1/0xd90 net/netlink/genetlink.c:602 genl_rcv_msg+0xca/0x16c net/netlink/genetlink.c:627 netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2486 genl_rcv+0x29/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1926 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:661 ___sys_sendmsg+0x806/0x930 net/socket.c:2260 __sys_sendmsg+0x105/0x1d0 net/socket.c:2298 __do_sys_sendmsg net/socket.c:2307 [inline] __se_sys_sendmsg net/socket.c:2305 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2305 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f297b972c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f297b9736d4 R13: 00000000004cd008 R14: 00000000004dab20 R15: 00000000ffffffff Allocated by task 5805: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511 __do_kmalloc mm/slab.c:3728 [inline] __kmalloc+0x15c/0x740 mm/slab.c:3737 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:742 [inline] ext4_htree_store_dirent+0x8a/0x650 fs/ext4/dir.c:450 htree_dirblock_to_tree+0x4fe/0x910 fs/ext4/namei.c:1021 ext4_htree_fill_tree+0x252/0xa50 fs/ext4/namei.c:1098 ext4_dx_readdir fs/ext4/dir.c:574 [inline] ext4_readdir+0x1999/0x3490 fs/ext4/dir.c:121 iterate_dir+0x489/0x5f0 fs/readdir.c:51 __do_sys_getdents fs/readdir.c:231 [inline] __se_sys_getdents fs/readdir.c:212 [inline] __x64_sys_getdents+0x1dd/0x370 fs/readdir.c:212 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5805: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459 kasan_slab_free+0xe/0x10 mm/kasan/common.c:467 __cache_free mm/slab.c:3500 [inline] kfree+0xcf/0x230 mm/slab.c:3823 free_rb_tree_fname+0x87/0xe0 fs/ext4/dir.c:402 ext4_htree_free_dir_info fs/ext4/dir.c:424 [inline] ext4_release_dir+0x46/0x70 fs/ext4/dir.c:622 __fput+0x2e5/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888061d11700 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 56 bytes to the right of 64-byte region [ffff888061d11700, ffff888061d11740) The buggy address belongs to the page: page:ffffea0001874440 count:1 mapcount:0 mapping:ffff88812c3f0340 index:0xffff888061d11e80 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea000249d4c8 ffffea0002280888 ffff88812c3f0340 raw: ffff888061d11e80 ffff888061d11000 000000010000001e 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888061d11600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888061d11680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888061d11700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888061d11780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff888061d11800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================