6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Niklas Cassel <cassel@xxxxxxxxxx>
commit eeb25a09c5e0805d92e4ebd12c4b0ad0df1b0295 upstream.
.probe() (ahci_init_one()) calls sysfs_add_file_to_group(), however,
if probe() fails after this call, we currently never call
sysfs_remove_file_from_group().
(The sysfs_remove_file_from_group() call in .remove() (ahci_remove_one())
does not help, as .remove() is not called on .probe() error.)
Thus, if probe() fails after the sysfs_add_file_to_group() call, the next
time we insmod the module we will get:
sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:04.0/remapped_nvme'
CPU: 11 PID: 954 Comm: modprobe Not tainted 6.10.0-rc5 #43
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x5d/0x80
sysfs_warn_dup.cold+0x17/0x23
sysfs_add_file_mode_ns+0x11a/0x130
sysfs_add_file_to_group+0x7e/0xc0
ahci_init_one+0x31f/0xd40 [ahci]
Fixes: 894fba7f434a ("ata: ahci: Add sysfs attribute to show remapped NVMe device count")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Link: https://lore.kernel.org/r/20240629124210.181537-10-cassel@xxxxxxxxxx
Signed-off-by: Niklas Cassel <cassel@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ata/ahci.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1890,8 +1890,10 @@ static int ahci_init_one(struct pci_dev
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
- if (!host)
- return -ENOMEM;
+ if (!host) {
+ rc = -ENOMEM;
+ goto err_rm_sysfs_file;
+ }
host->private_data = hpriv;
if (ahci_init_msi(pdev, n_ports, hpriv) < 0) {
@@ -1944,11 +1946,11 @@ static int ahci_init_one(struct pci_dev
/* initialize adapter */
rc = ahci_configure_dma_masks(pdev, hpriv);
if (rc)
- return rc;
+ goto err_rm_sysfs_file;
rc = ahci_pci_reset_controller(host);
if (rc)
- return rc;
+ goto err_rm_sysfs_file;
ahci_pci_init_controller(host);
ahci_pci_print_info(host);
@@ -1957,10 +1959,15 @@ static int ahci_init_one(struct pci_dev
rc = ahci_host_activate(host, &ahci_sht);
if (rc)
- return rc;
+ goto err_rm_sysfs_file;
pm_runtime_put_noidle(&pdev->dev);
return 0;
+
+err_rm_sysfs_file:
+ sysfs_remove_file_from_group(&pdev->dev.kobj,
+ &dev_attr_remapped_nvme.attr, NULL);
+ return rc;
}
static void ahci_shutdown_one(struct pci_dev *pdev)
