All of lore.kernel.org
 help / color / mirror / Atom feed
From: syzbot <syzbot+44b651863a17760a893b@syzkaller.appspotmail.com>
To: alex.aring@gmail.com, davem@davemloft.net, kuba@kernel.org,
	linux-kernel@vger.kernel.org, linux-wpan@vger.kernel.org,
	netdev@vger.kernel.org, stefan@datenfreihafen.org,
	syzkaller-bugs@googlegroups.com
Subject: memory leak in __pskb_copy_fclone
Date: Mon, 22 Feb 2021 01:25:20 -0800	[thread overview]
Message-ID: <000000000000731bc205bbe96143@google.com> (raw)

Hello,

syzbot found the following issue on:

HEAD commit:    f40ddce8 Linux 5.11
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17b89c34d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5528e8db7fc481ae
dashboard link: https://syzkaller.appspot.com/bug?extid=44b651863a17760a893b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14a9d40cd00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1208fccad00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+44b651863a17760a893b@syzkaller.appspotmail.com

executing program
executing program
BUG: memory leak
unreferenced object 0xffff888110c36e00 (size 232):
  comm "syz-executor899", pid 8419, jiffies 4294996042 (age 38.220s)
  hex dump (first 32 bytes):
    10 1b f0 10 81 88 ff ff 10 1b f0 10 81 88 ff ff  ................
    00 00 00 00 00 00 00 00 40 1a f0 10 81 88 ff ff  ........@.......
  backtrace:
    [<00000000b4534d28>] __alloc_skb+0x6d/0x280 net/core/skbuff.c:198
    [<00000000a1f27cd4>] __pskb_copy_fclone+0x73/0x330 net/core/skbuff.c:1563
    [<000000003311a1de>] __pskb_copy include/linux/skbuff.h:1163 [inline]
    [<000000003311a1de>] pskb_copy include/linux/skbuff.h:3130 [inline]
    [<000000003311a1de>] hwsim_hw_xmit+0xd3/0x140 drivers/net/ieee802154/mac802154_hwsim.c:132
    [<00000000c07253fa>] drv_xmit_async net/mac802154/driver-ops.h:16 [inline]
    [<00000000c07253fa>] ieee802154_tx+0xc7/0x190 net/mac802154/tx.c:83
    [<000000001b265c49>] ieee802154_subif_start_xmit+0x58/0x70 net/mac802154/tx.c:132
    [<00000000908eabe9>] __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
    [<00000000908eabe9>] netdev_start_xmit include/linux/netdevice.h:4792 [inline]
    [<00000000908eabe9>] xmit_one net/core/dev.c:3574 [inline]
    [<00000000908eabe9>] dev_hard_start_xmit+0xe1/0x330 net/core/dev.c:3590
    [<000000007fbb3187>] sch_direct_xmit+0x1c5/0x500 net/sched/sch_generic.c:313
    [<000000001df39c76>] qdisc_restart net/sched/sch_generic.c:376 [inline]
    [<000000001df39c76>] __qdisc_run+0x201/0x810 net/sched/sch_generic.c:384
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:136 [inline]
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:128 [inline]
    [<000000002521364f>] __dev_xmit_skb net/core/dev.c:3765 [inline]
    [<000000002521364f>] __dev_queue_xmit+0xb9b/0xf60 net/core/dev.c:4119
    [<00000000fe77cf74>] dgram_sendmsg+0x40c/0x4d0 net/ieee802154/socket.c:682
    [<00000000f9f3520e>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000f9f3520e>] sock_sendmsg+0x56/0x80 net/socket.c:672
    [<000000005e70a8bc>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2345
    [<00000000e2a23226>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2399
    [<000000008b9fc415>] __sys_sendmsg+0x88/0x100 net/socket.c:2432
    [<0000000089dd1aab>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<0000000011f571a2>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888103ae5f00 (size 232):
  comm "syz-executor899", pid 8428, jiffies 4294998453 (age 14.110s)
  hex dump (first 32 bytes):
    50 1b f0 10 81 88 ff ff 50 1b f0 10 81 88 ff ff  P.......P.......
    00 00 00 00 00 00 00 00 80 1a f0 10 81 88 ff ff  ................
  backtrace:
    [<00000000b4534d28>] __alloc_skb+0x6d/0x280 net/core/skbuff.c:198
    [<00000000a1f27cd4>] __pskb_copy_fclone+0x73/0x330 net/core/skbuff.c:1563
    [<000000003311a1de>] __pskb_copy include/linux/skbuff.h:1163 [inline]
    [<000000003311a1de>] pskb_copy include/linux/skbuff.h:3130 [inline]
    [<000000003311a1de>] hwsim_hw_xmit+0xd3/0x140 drivers/net/ieee802154/mac802154_hwsim.c:132
    [<00000000c07253fa>] drv_xmit_async net/mac802154/driver-ops.h:16 [inline]
    [<00000000c07253fa>] ieee802154_tx+0xc7/0x190 net/mac802154/tx.c:83
    [<000000001b265c49>] ieee802154_subif_start_xmit+0x58/0x70 net/mac802154/tx.c:132
    [<00000000908eabe9>] __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
    [<00000000908eabe9>] netdev_start_xmit include/linux/netdevice.h:4792 [inline]
    [<00000000908eabe9>] xmit_one net/core/dev.c:3574 [inline]
    [<00000000908eabe9>] dev_hard_start_xmit+0xe1/0x330 net/core/dev.c:3590
    [<000000007fbb3187>] sch_direct_xmit+0x1c5/0x500 net/sched/sch_generic.c:313
    [<000000001df39c76>] qdisc_restart net/sched/sch_generic.c:376 [inline]
    [<000000001df39c76>] __qdisc_run+0x201/0x810 net/sched/sch_generic.c:384
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:136 [inline]
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:128 [inline]
    [<000000002521364f>] __dev_xmit_skb net/core/dev.c:3765 [inline]
    [<000000002521364f>] __dev_queue_xmit+0xb9b/0xf60 net/core/dev.c:4119
    [<00000000fe77cf74>] dgram_sendmsg+0x40c/0x4d0 net/ieee802154/socket.c:682
    [<00000000f9f3520e>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000f9f3520e>] sock_sendmsg+0x56/0x80 net/socket.c:672
    [<000000005e70a8bc>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2345
    [<00000000e2a23226>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2399
    [<000000008b9fc415>] __sys_sendmsg+0x88/0x100 net/socket.c:2432
    [<0000000089dd1aab>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<0000000011f571a2>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88810d717c00 (size 512):
  comm "syz-executor899", pid 8428, jiffies 4294998453 (age 14.110s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000010ef2c1d>] __kmalloc_reserve net/core/skbuff.c:142 [inline]
    [<0000000010ef2c1d>] __alloc_skb+0xab/0x280 net/core/skbuff.c:210
    [<00000000a1f27cd4>] __pskb_copy_fclone+0x73/0x330 net/core/skbuff.c:1563
    [<000000003311a1de>] __pskb_copy include/linux/skbuff.h:1163 [inline]
    [<000000003311a1de>] pskb_copy include/linux/skbuff.h:3130 [inline]
    [<000000003311a1de>] hwsim_hw_xmit+0xd3/0x140 drivers/net/ieee802154/mac802154_hwsim.c:132
    [<00000000c07253fa>] drv_xmit_async net/mac802154/driver-ops.h:16 [inline]
    [<00000000c07253fa>] ieee802154_tx+0xc7/0x190 net/mac802154/tx.c:83
    [<000000001b265c49>] ieee802154_subif_start_xmit+0x58/0x70 net/mac802154/tx.c:132
    [<00000000908eabe9>] __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
    [<00000000908eabe9>] netdev_start_xmit include/linux/netdevice.h:4792 [inline]
    [<00000000908eabe9>] xmit_one net/core/dev.c:3574 [inline]
    [<00000000908eabe9>] dev_hard_start_xmit+0xe1/0x330 net/core/dev.c:3590
    [<000000007fbb3187>] sch_direct_xmit+0x1c5/0x500 net/sched/sch_generic.c:313
    [<000000001df39c76>] qdisc_restart net/sched/sch_generic.c:376 [inline]
    [<000000001df39c76>] __qdisc_run+0x201/0x810 net/sched/sch_generic.c:384
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:136 [inline]
    [<000000002521364f>] qdisc_run include/net/pkt_sched.h:128 [inline]
    [<000000002521364f>] __dev_xmit_skb net/core/dev.c:3765 [inline]
    [<000000002521364f>] __dev_queue_xmit+0xb9b/0xf60 net/core/dev.c:4119
    [<00000000fe77cf74>] dgram_sendmsg+0x40c/0x4d0 net/ieee802154/socket.c:682
    [<00000000f9f3520e>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000f9f3520e>] sock_sendmsg+0x56/0x80 net/socket.c:672
    [<000000005e70a8bc>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2345
    [<00000000e2a23226>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2399
    [<000000008b9fc415>] __sys_sendmsg+0x88/0x100 net/socket.c:2432
    [<0000000089dd1aab>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<0000000011f571a2>] entry_SYSCALL_64_after_hwframe+0x44/0xa9



---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

                 reply	other threads:[~2021-02-22  9:27 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=000000000000731bc205bbe96143@google.com \
    --to=syzbot+44b651863a17760a893b@syzkaller.appspotmail.com \
    --cc=alex.aring@gmail.com \
    --cc=davem@davemloft.net \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-wpan@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=stefan@datenfreihafen.org \
    --cc=syzkaller-bugs@googlegroups.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.