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| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | KASAN: slab-out-of-bounds Write in tcindex_set_parms | 23 | C | done | 10 | 1981d | 2002d | 15/29 | fixed on 2020/05/10 10:42 | |
| linux-4.19 | KASAN: slab-out-of-bounds Write in tcindex_set_parms | 23 | C | done | 2 | 2000d | 2000d | 1/1 | fixed on 2020/04/12 11:41 |
audit: type=1400 audit(1584551797.681:36): avc: denied { map } for pid=7252 comm="syz-executor815" path="/root/syz-executor815421090" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: slab-out-of-bounds in tcindex_set_parms+0x1521/0x16a0 net/sched/cls_tcindex.c:473
Write of size 16 at addr ffff888095dda8f0 by task syz-executor815/7253
CPU: 0 PID: 7253 Comm: syz-executor815 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
tcindex_set_parms+0x1521/0x16a0 net/sched/cls_tcindex.c:473
tcindex_change+0x1b5/0x270 net/sched/cls_tcindex.c:534
tc_ctl_tfilter+0xf13/0x18e6 net/sched/cls_api.c:738
rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1313
netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1878
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xc5/0x100 net/socket.c:656
___sys_sendmsg+0x70a/0x840 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440e79
RSP: 002b:00007fffaef80ca8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004a2650 RCX: 0000000000440e79
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00007fffaef80cb0 R08: 0000000120080522 R09: 0000000120080522
R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a2650
R13: 0000000000402410 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 7253:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc_track_caller+0x153/0x7b0 mm/slab.c:3735
kmemdup+0x23/0x50 mm/util.c:118
kmemdup include/linux/string.h:420 [inline]
mpls_dev_sysctl_register+0x94/0x290 net/mpls/af_mpls.c:1323
mpls_add_dev net/mpls/af_mpls.c:1389 [inline]
mpls_dev_notify+0x1f9/0x691 net/mpls/af_mpls.c:1511
notifier_call_chain+0x107/0x1a0 kernel/notifier.c:93
call_netdevice_notifiers net/core/dev.c:1687 [inline]
register_netdevice+0x9e2/0xc70 net/core/dev.c:7691
register_netdev+0x17/0x30 net/core/dev.c:7798
sit_init_net+0x2cf/0x8d0 net/ipv6/sit.c:1850
ops_init+0xa5/0x3c0 net/core/net_namespace.c:118
setup_net+0x22f/0x500 net/core/net_namespace.c:295
copy_net_ns+0x19b/0x440 net/core/net_namespace.c:419
create_new_namespaces+0x375/0x730 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xa5/0x1e0 kernel/nsproxy.c:206
SYSC_unshare kernel/fork.c:2391 [inline]
SyS_unshare+0x2ea/0x740 kernel/fork.c:2341
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 17:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcb/0x260 mm/slab.c:3815
__rcu_reclaim kernel/rcu/rcu.h:190 [inline]
rcu_do_batch kernel/rcu/tree.c:2699 [inline]
invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
__rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
rcu_process_callbacks+0x8a3/0x1190 kernel/rcu/tree.c:2946
__do_softirq+0x254/0x9bf kernel/softirq.c:288
The buggy address belongs to the object at ffff888095dda840
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 48 bytes to the right of
128-byte region [ffff888095dda840, ffff888095dda8c0)
The buggy address belongs to the page:
page:ffffea0002577680 count:1 mapcount:0 mapping:ffff888095dda000 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff888095dda000 0000000000000000 0000000100000015
raw: ffffea0002936ae0 ffffea0002593920 ffff88812fe56640 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888095dda780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
ffff888095dda800: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
>ffff888095dda880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
^
ffff888095dda900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
ffff888095dda980: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/03/18 17:19 | linux-4.14.y | 12cd844a39ed | 0a96a13c | .config | console log | report | syz | C | ci2-linux-4-14 | |||
| 2020/03/18 16:04 | linux-4.14.y | 12cd844a39ed | 0a96a13c | .config | console log | report | syz | C | ci2-linux-4-14 |