hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

pps: add an error check in parport_attach 

[ Upstream commit 62c5a01a57 ]

In parport_attach, the return value of ida_alloc is unchecked, witch leads
to the use of an invalid index value.

To address this issue, index should be checked. When the index value is
abnormal, the device should be freed.

Found by code review, compile tested only.

Cc: stable@vger.kernel.org
Fixes: fb56d97df7 ("pps: client: use new parport device model")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Link: https://lore.kernel.org/r/20240828131814.3034338-1-make24@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ma Ke 2024-08-28 21:18:14 +08:00 committed by Greg Kroah-Hartman
parent 8b48ea2718
commit 73c1928a00
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pps/clients/pps_parport.c
View File

@ -149,6 +149,9 @@ static void parport_attach(struct parport *port)
}
index = ida_alloc(&pps_client_index, GFP_KERNEL);
if (index < 0)
goto err_free_device;
memset(&pps_client_cb, 0, sizeof(pps_client_cb));
pps_client_cb.private = device;
pps_client_cb.irq_func = parport_irq;
@ -159,7 +162,7 @@ static void parport_attach(struct parport *port)
index);
if (!device->pardev) {
pr_err("couldn't register with %s\n", port->name);
goto err_free;
goto err_free_ida;
}
if (parport_claim_or_block(device->pardev) < 0) {
@ -187,8 +190,9 @@ err_release_dev:
parport_release(device->pardev);
err_unregister_dev:
parport_unregister_device(device->pardev);
err_free:
err_free_ida:
ida_free(&pps_client_index, index);
err_free_device:
kfree(device);
}