netlink: 'syz-executor929': attribute type 2 has an invalid length. protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 netlink: 'syz-executor929': attribute type 2 has an invalid length. ================================================================== BUG: KASAN: slab-out-of-bounds in tcf_exts_destroy+0xb3/0xd0 net/sched/cls_api.c:2041 Read of size 8 at addr ffff8880a4549790 by task syz-executor929/7634 CPU: 0 PID: 7634 Comm: syz-executor929 Not tainted 4.19.79 #0 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:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 tcf_exts_destroy+0xb3/0xd0 net/sched/cls_api.c:2041 tcindex_free_perfect_hash.isra.0+0xb3/0x150 net/sched/cls_tcindex.c:270 tcindex_set_parms+0x10e7/0x1e20 net/sched/cls_tcindex.c:484 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 tcindex_change+0x22d/0x315 net/sched/cls_tcindex.c:518 tc_new_tfilter+0xc54/0x1790 net/sched/cls_api.c:1320 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:4747 protocol 88fb is buggy, dev hsr_slave_0 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 protocol 88fb is buggy, dev hsr_slave_1 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x1bf/0x4e0 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443299 Code: e8 9c 07 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffde91bb8a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443299 RDX: 0000000000000332 RSI: 0000000020000140 RDI: 0000000000000008 RBP: 000000000000000c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030766461746162 R13: 00000000004041f0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 7634: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15d/0x750 mm/slab.c:3736 kmalloc_array include/linux/slab.h:637 [inline] kcalloc include/linux/slab.h:648 [inline] tcindex_alloc_perfect_hash+0x5b/0x350 net/sched/cls_tcindex.c:278 tcindex_set_parms+0x44e/0x1e20 net/sched/cls_tcindex.c:339 tcindex_change+0x22d/0x315 net/sched/cls_tcindex.c:518 tc_new_tfilter+0xc54/0x1790 net/sched/cls_api.c:1320 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:4747 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x1bf/0x4e0 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2232: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3503 [inline] kfree+0xcf/0x220 mm/slab.c:3822 call_usermodehelper_freeinfo kernel/umh.c:45 [inline] umh_complete kernel/umh.c:59 [inline] umh_complete+0x8d/0xa0 kernel/umh.c:48 call_usermodehelper_exec_async+0x560/0x640 kernel/umh.c:117 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8880a4549700 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 144 bytes inside of 192-byte region [ffff8880a4549700, ffff8880a45497c0) The buggy address belongs to the page: page:ffffea0002915240 count:1 mapcount:0 mapping:ffff88812c3f0040 index:0x0 flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffffea00028faa88 ffffea00028f1f88 ffff88812c3f0040 raw: 0000000000000000 ffff8880a4549000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a4549680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880a4549700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a4549780: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a4549800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a4549880: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================