From: syzbot <syzbot+f196caa45793d6374707@syzkaller.appspotmail.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Subject: memory leak in do_eventfd
Date: Wed, 20 May 2020 18:12:17 -0700 [thread overview]
Message-ID: <0000000000001daa8d05a61e3440@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 5a9ffb95 Merge tag '5.7-rc5-smb3-fixes' of git://git.samba..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10b72a02100000
kernel config: https://syzkaller.appspot.com/x/.config?x=f8295ae5b3f8268d
dashboard link: https://syzkaller.appspot.com/bug?extid=f196caa45793d6374707
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17585b76100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12500a02100000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+f196caa45793d6374707@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff888117169ac0 (size 64):
comm "syz-executor012", pid 6609, jiffies 4294942172 (age 13.720s)
hex dump (first 32 bytes):
01 00 00 00 ff ff ff ff 00 00 00 00 00 c9 ff ff ................
d0 9a 16 17 81 88 ff ff d0 9a 16 17 81 88 ff ff ................
backtrace:
[<00000000351bb234>] kmalloc include/linux/slab.h:555 [inline]
[<00000000351bb234>] do_eventfd+0x35/0xf0 fs/eventfd.c:418
[<00000000c2f69a77>] __do_sys_eventfd fs/eventfd.c:443 [inline]
[<00000000c2f69a77>] __se_sys_eventfd fs/eventfd.c:441 [inline]
[<00000000c2f69a77>] __x64_sys_eventfd+0x14/0x20 fs/eventfd.c:441
[<0000000086d6f989>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295
[<000000006c5bcb63>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888117169100 (size 64):
comm "syz-executor012", pid 6609, jiffies 4294942172 (age 13.720s)
hex dump (first 32 bytes):
e8 99 dd 00 00 c9 ff ff e8 99 dd 00 00 c9 ff ff ................
00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 ... ............
backtrace:
[<00000000436d2955>] kmalloc include/linux/slab.h:555 [inline]
[<00000000436d2955>] kzalloc include/linux/slab.h:669 [inline]
[<00000000436d2955>] kvm_assign_ioeventfd_idx+0x4f/0x270 arch/x86/kvm/../../../virt/kvm/eventfd.c:798
[<00000000e89390cc>] kvm_assign_ioeventfd arch/x86/kvm/../../../virt/kvm/eventfd.c:934 [inline]
[<00000000e89390cc>] kvm_ioeventfd+0xbb/0x194 arch/x86/kvm/../../../virt/kvm/eventfd.c:961
[<00000000ba9f6732>] kvm_vm_ioctl+0x1e6/0x1030 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3670
[<000000005da94937>] vfs_ioctl fs/ioctl.c:47 [inline]
[<000000005da94937>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:771
[<00000000a583d097>] __do_sys_ioctl fs/ioctl.c:780 [inline]
[<00000000a583d097>] __se_sys_ioctl fs/ioctl.c:778 [inline]
[<00000000a583d097>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:778
[<0000000086d6f989>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295
[<000000006c5bcb63>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
---
This bug 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 bug, for details see:
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next reply other threads:[~2020-05-21 1:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-21 1:12 syzbot [this message]
2020-06-05 4:24 ` memory leak in do_eventfd Eric Biggers
2020-08-07 7:04 ` Rustam Kovhaev
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