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From: syzbot <syzbot+a785d07959bc94837d51@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	 linux-mm@kvack.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] memory leak in xas_create
Date: Sat, 09 Jul 2022 00:13:23 -0700	[thread overview]
Message-ID: <000000000000eb2d6c05e35a0d73@google.com> (raw)

Hello,

syzbot found the following issue on:

HEAD commit:    c1084b6c5620 Merge tag 'soc-fixes-5.19-2' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14967ccc080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=916233b7694a38ff
dashboard link: https://syzkaller.appspot.com/bug?extid=a785d07959bc94837d51
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=122ae834080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a785d07959bc94837d51@syzkaller.appspotmail.com

2022/07/05 05:22:17 executed programs: 828
2022/07/05 05:22:23 executed programs: 846
2022/07/05 05:22:30 executed programs: 866
2022/07/05 05:22:37 executed programs: 875
BUG: memory leak
unreferenced object 0xffff888113662480 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    06 15 08 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    58 08 46 1d 81 88 ff ff 98 24 66 13 81 88 ff ff  X.F......$f.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

BUG: memory leak
unreferenced object 0xffff8881136e2900 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    00 07 00 00 00 00 00 00 80 24 66 13 81 88 ff ff  .........$f.....
    58 08 46 1d 81 88 ff ff 18 29 6e 13 81 88 ff ff  X.F......)n.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

BUG: memory leak
unreferenced object 0xffff8881136e0480 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    00 06 00 00 00 00 00 00 80 24 66 13 81 88 ff ff  .........$f.....
    58 08 46 1d 81 88 ff ff 98 04 6e 13 81 88 ff ff  X.F.......n.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

BUG: memory leak
unreferenced object 0xffff8881136de900 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    00 05 00 00 00 00 00 00 80 24 66 13 81 88 ff ff  .........$f.....
    58 08 46 1d 81 88 ff ff 18 e9 6d 13 81 88 ff ff  X.F.......m.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

BUG: memory leak
unreferenced object 0xffff88811371b6c0 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    00 04 00 00 00 00 00 00 80 24 66 13 81 88 ff ff  .........$f.....
    58 08 46 1d 81 88 ff ff d8 b6 71 13 81 88 ff ff  X.F.......q.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

BUG: memory leak
unreferenced object 0xffff888113666d80 (size 576):
  comm "khugepaged", pid 32, jiffies 4295002751 (age 22.940s)
  hex dump (first 32 bytes):
    00 03 00 00 00 00 00 00 80 24 66 13 81 88 ff ff  .........$f.....
    58 08 46 1d 81 88 ff ff 98 6d 66 13 81 88 ff ff  X.F......mf.....
  backtrace:
    [<ffffffff824aa006>] xas_alloc+0xf6/0x120 lib/xarray.c:377
    [<ffffffff824acc55>] xas_create+0x395/0x820 lib/xarray.c:679
    [<ffffffff824ad180>] xas_create_range+0xa0/0x1c0 lib/xarray.c:719
    [<ffffffff815957f3>] collapse_file+0x283/0x2870 mm/khugepaged.c:1670
    [<ffffffff8159b52c>] khugepaged_scan_file mm/khugepaged.c:2072 [inline]
    [<ffffffff8159b52c>] khugepaged_scan_mm_slot mm/khugepaged.c:2167 [inline]
    [<ffffffff8159b52c>] khugepaged_do_scan mm/khugepaged.c:2251 [inline]
    [<ffffffff8159b52c>] khugepaged+0x227c/0x43a0 mm/khugepaged.c:2296
    [<ffffffff8127b8b5>] kthread+0x125/0x160 kernel/kthread.c:376
    [<ffffffff8100222f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302



---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot can test patches for this issue, for details see:
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             reply	other threads:[~2022-07-09  7:13 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-09  7:13 syzbot [this message]
2022-07-11 20:38 ` [syzbot] memory leak in xas_create Andrew Morton
2022-07-11 20:46   ` Matthew Wilcox
2022-07-12  6:54     ` Dmitry Vyukov
2022-07-12 12:40       ` Matthew Wilcox
2022-07-12 12:50         ` Dmitry Vyukov
2022-07-12 12:57           ` Matthew Wilcox
2022-07-12 13:29             ` Dmitry Vyukov
2022-07-14 16:27               ` Matthew Wilcox
2022-07-12 13:35             ` Matthew Wilcox
2022-11-06 23:26 ` syzbot

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