lkml.org 
[lkml]   [2020]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
Subjectmemory leak in video_usercopy
From
Hello,

syzbot found the following issue on:

HEAD commit: a409ed15 Merge tag 'gpio-v5.11-1' of git://git.kernel.org/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10a5880f500000
kernel config: https://syzkaller.appspot.com/x/.config?x=37c889fb8b2761af
dashboard link: https://syzkaller.appspot.com/bug?extid=1115e79c8df6472c612b
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14d18f9b500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=106a2c13500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1115e79c8df6472c612b@syzkaller.appspotmail.com

Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts.
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810fb12300 (size 256):
comm "syz-executor399", pid 8472, jiffies 4294942333 (age 13.960s)
hex dump (first 32 bytes):
03 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:
[<000000009fd00995>] kmalloc_node include/linux/slab.h:575 [inline]
[<000000009fd00995>] kvmalloc_node+0x61/0xf0 mm/util.c:575
[<0000000096a57c4a>] kvmalloc include/linux/mm.h:773 [inline]
[<0000000096a57c4a>] video_usercopy+0x991/0xa50 drivers/media/v4l2-core/v4l2-ioctl.c:3303
[<00000000f7529cc2>] v4l2_ioctl+0x77/0x90 drivers/media/v4l2-core/v4l2-dev.c:360
[<0000000061b5e6a9>] vfs_ioctl fs/ioctl.c:48 [inline]
[<0000000061b5e6a9>] __do_sys_ioctl fs/ioctl.c:753 [inline]
[<0000000061b5e6a9>] __se_sys_ioctl fs/ioctl.c:739 [inline]
[<0000000061b5e6a9>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:739
[<000000000139479b>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000d6de1c9c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88810f934300 (size 256):
comm "syz-executor399", pid 8473, jiffies 4294942927 (age 8.030s)
hex dump (first 32 bytes):
03 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:
[<000000009fd00995>] kmalloc_node include/linux/slab.h:575 [inline]
[<000000009fd00995>] kvmalloc_node+0x61/0xf0 mm/util.c:575
[<0000000096a57c4a>] kvmalloc include/linux/mm.h:773 [inline]
[<0000000096a57c4a>] video_usercopy+0x991/0xa50 drivers/media/v4l2-core/v4l2-ioctl.c:3303
[<00000000f7529cc2>] v4l2_ioctl+0x77/0x90 drivers/media/v4l2-core/v4l2-dev.c:360
[<0000000061b5e6a9>] vfs_ioctl fs/ioctl.c:48 [inline]
[<0000000061b5e6a9>] __do_sys_ioctl fs/ioctl.c:753 [inline]
[<0000000061b5e6a9>] __se_sys_ioctl fs/ioctl.c:739 [inline]
[<0000000061b5e6a9>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:739
[<000000000139479b>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000d6de1c9c>] 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

\
 
 \ /
  Last update: 2020-12-19 14:15    [W:0.400 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site