[+Cc kvm mailing list] On Wed, May 20, 2020 at 06:12:17PM -0700, syzbot wrote: > 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@xxxxxxxxxxxxxxxxxxxxxxxxx > > 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. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > 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 > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000001daa8d05a61e3440%40google.com.
