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KASAN: use-after-free Read in __rhashtable_lookup (6)

Status: auto-closed as invalid on 2021/11/20 20:36
Subsystems: net
[Documentation on labels]
First crash: 1026d, last: 1026d
▶ ▼ Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Read in __rhashtable_lookup (2) rds C 22 2102d 2122d 10/27 fixed on 2018/09/26 21:51
upstream KASAN: use-after-free Read in __rhashtable_lookup (3) net 1 1311d 1311d 0/27 auto-closed as invalid on 2021/02/08 22:50
upstream KASAN: use-after-free Read in __rhashtable_lookup (5) net 1 1122d 1122d 0/27 auto-closed as invalid on 2021/08/17 13:23
upstream KASAN: use-after-free Read in __rhashtable_lookup (8) net 1 874d 874d 0/27 auto-closed as invalid on 2022/04/22 11:27
upstream KASAN: use-after-free Read in __rhashtable_lookup (7) net 1 928d 928d 0/27 closed as invalid on 2022/01/07 18:56
upstream KASAN: use-after-free Read in __rhashtable_lookup (4) net 1 1215d 1211d 0/27 auto-closed as invalid on 2021/05/16 18:04
upstream KASAN: use-after-free Read in __rhashtable_lookup rds 1 2141d 2137d 0/27 closed as dup on 2018/08/08 09:26

Sample crash report:
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
==================================================================
BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline]
BUG: KASAN: use-after-free in __rhashtable_lookup.constprop.0+0x3e2/0x4f0 include/linux/rhashtable.h:596
Read of size 4 at addr ffff88807b572008 by task ksoftirqd/0/13

CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
 rht_key_hashfn include/linux/rhashtable.h:159 [inline]
 __rhashtable_lookup.constprop.0+0x3e2/0x4f0 include/linux/rhashtable.h:596
 rhashtable_lookup include/linux/rhashtable.h:638 [inline]
 rhashtable_lookup_fast include/linux/rhashtable.h:664 [inline]
 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:133 [inline]
 ila_xlat_addr net/ipv6/ila/ila_xlat.c:648 [inline]
 ila_nf_input+0x2df/0x790 net/ipv6/ila/ila_xlat.c:191
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:589
 nf_hook include/linux/netfilter.h:262 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 br_nf_pre_routing_ipv6+0x52b/0x7b0 net/bridge/br_netfilter_ipv6.c:236
 br_nf_pre_routing+0x1477/0x1ec0 net/bridge/br_netfilter_hooks.c:505
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:225 [inline]
 br_handle_frame+0x8fa/0x1180 net/bridge/br_input.c:368
 __netif_receive_skb_core+0x9f0/0x37c0 net/core/dev.c:5392
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5496
 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5612
 process_backlog+0x2a5/0x6c0 net/core/dev.c:6492
 __napi_poll+0xaf/0x440 net/core/dev.c:7047
 napi_poll net/core/dev.c:7114 [inline]
 net_rx_action+0x801/0xb40 net/core/dev.c:7201
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:920 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Allocated by task 4196:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:522
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:587
 kvmalloc include/linux/mm.h:806 [inline]
 kvzalloc include/linux/mm.h:814 [inline]
 bucket_table_alloc.isra.0+0x8b/0x490 lib/rhashtable.c:184
 rhashtable_rehash_alloc+0x68/0x110 lib/rhashtable.c:360
 rhashtable_shrink lib/rhashtable.c:404 [inline]
 rht_deferred_worker+0xea6/0x2030 lib/rhashtable.c:422
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 182:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1628 [inline]
 slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1653
 slab_free mm/slub.c:3213 [inline]
 kfree+0xe4/0x540 mm/slub.c:4267
 kvfree+0x42/0x50 mm/util.c:616
 rhashtable_free_and_destroy+0x147/0x920 lib/rhashtable.c:1159
 ila_xlat_exit_net+0x146/0x360 net/ipv6/ila/ila_xlat.c:622
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:175
 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff88807b572000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 8 bytes inside of
 4096-byte region [ffff88807b572000, ffff88807b573000)
The buggy address belongs to the page:
page:ffffea0001ed5c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b570
head:ffffea0001ed5c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010842140
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 21259, ts 476464921504, free_ts 475727222380
 prep_new_page mm/page_alloc.c:2436 [inline]
 get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4169
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5391
 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244
 alloc_slab_page mm/slub.c:1691 [inline]
 allocate_slab+0x32e/0x4b0 mm/slub.c:1831
 new_slab mm/slub.c:1894 [inline]
 new_slab_objects mm/slub.c:2640 [inline]
 ___slab_alloc+0x4ba/0x820 mm/slub.c:2803
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2843
 slab_alloc_node mm/slub.c:2925 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 __kmalloc_track_caller+0x371/0x420 mm/slub.c:4622
 kmemdup+0x23/0x50 mm/util.c:128
 kmemdup include/linux/fortify-string.h:270 [inline]
 __devinet_sysctl_register+0x98/0x280 net/ipv4/devinet.c:2560
 devinet_sysctl_register net/ipv4/devinet.c:2612 [inline]
 devinet_sysctl_register+0x160/0x230 net/ipv4/devinet.c:2602
 inetdev_init+0x25d/0x550 net/ipv4/devinet.c:276
 inetdev_event+0xa87/0x15d0 net/ipv4/devinet.c:1530
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
 call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
 call_netdevice_notifiers net/core/dev.c:2149 [inline]
 register_netdevice+0x106b/0x1500 net/core/dev.c:10380
 register_netdev+0x2d/0x50 net/core/dev.c:10473
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1346 [inline]
 free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397
 free_unref_page_prepare mm/page_alloc.c:3332 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3411
 unfreeze_partials+0x17c/0x1d0 mm/slub.c:2421
 put_cpu_partial+0x13d/0x230 mm/slub.c:2457
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:2959 [inline]
 kmem_cache_alloc_node+0x266/0x3e0 mm/slub.c:2995
 __alloc_skb+0x20b/0x340 net/core/skbuff.c:414
 alloc_skb include/linux/skbuff.h:1112 [inline]
 sock_wmalloc+0xd0/0x120 net/core/sock.c:2312
 pppol2tp_sendmsg+0x29a/0x7c0 net/l2tp/l2tp_ppp.c:292
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 ____sys_sendmsg+0x331/0x810 net/socket.c:2392
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446
 __sys_sendmmsg+0x195/0x470 net/socket.c:2532
 __do_sys_sendmmsg net/socket.c:2561 [inline]
 __se_sys_sendmmsg net/socket.c:2558 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2558

Memory state around the buggy address:
 ffff88807b571f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807b571f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807b572000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88807b572080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807b572100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/22 20:36 net-old 12d125b4574b b599f2fc .config console log report info ci-upstream-net-this-kasan-gce KASAN: use-after-free Read in __rhashtable_lookup
* Struck through repros no longer work on HEAD.