lkml.org 
[lkml]   [2020]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
Subjectmemory leak in garp_request_join
From
Hello,

syzbot found the following crash on:

HEAD commit: d5226fa6 Linux 5.5
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=176b440de00000
kernel config: https://syzkaller.appspot.com/x/.config?x=698d5ad38dda6cb6
dashboard link: https://syzkaller.appspot.com/bug?extid=13ad608e190b5f8ad8a8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d86b35e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1043d769e00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+13ad608e190b5f8ad8a8@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888114008dc0 (size 64):
comm "syz-executor967", pid 7318, jiffies 4294943348 (age 13.580s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 08 00 00 00 01 02 00 08 ................
backtrace:
[<0000000067139221>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<0000000067139221>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<0000000067139221>] slab_alloc mm/slab.c:3320 [inline]
[<0000000067139221>] __do_kmalloc mm/slab.c:3654 [inline]
[<0000000067139221>] __kmalloc+0x169/0x300 mm/slab.c:3665
[<0000000093813bfa>] kmalloc include/linux/slab.h:561 [inline]
[<0000000093813bfa>] garp_attr_create net/802/garp.c:187 [inline]
[<0000000093813bfa>] garp_request_join+0x132/0x1f0 net/802/garp.c:350
[<0000000078a2be7e>] vlan_gvrp_request_join+0x86/0x90 net/8021q/vlan_gvrp.c:34
[<0000000092861d25>] vlan_dev_open+0x173/0x290 net/8021q/vlan_dev.c:290
[<00000000451be632>] __dev_open+0x109/0x1b0 net/core/dev.c:1431
[<00000000fa297b7f>] __dev_change_flags+0x246/0x2c0 net/core/dev.c:8105
[<0000000065bc5439>] rtnl_configure_link+0x57/0x100 net/core/rtnetlink.c:2996
[<000000005ed66308>] __rtnl_newlink+0x8b9/0xb80 net/core/rtnetlink.c:3332
[<00000000d6be140e>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3372
[<0000000030786841>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5433
[<00000000cb252134>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
[<000000002c0f0d61>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5451
[<00000000e09dee2f>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
[<00000000e09dee2f>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
[<0000000036f4d1c5>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
[<0000000064dc927c>] sock_sendmsg_nosec net/socket.c:639 [inline]
[<0000000064dc927c>] sock_sendmsg+0x54/0x70 net/socket.c:659
[<00000000cd57f12f>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330



---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

\
 
 \ /
  Last update: 2020-01-27 20:28    [W:0.200 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site