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s390/pci: Fix missing check for zpci_create_device() error return

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BugLink: https://bugs.launchpad.net/bugs/2114174

The zpci_create_device() function returns an error pointer that needs to
be checked before dereferencing it as a struct zpci_dev pointer. Add the
missing check in __clp_add() where it was missed when adding the
scan_list in the fixed commit. Simply not adding the device to the scan
list results in the previous behavior.

Cc: stable@vger.kernel.org
Fixes: 0467cdde8c43 ("s390/pci: Sort PCI functions prior to creating virtual busses")
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Gerd Bayer <gbayer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
(cherry picked from commit 42420c50c68f3e95e90de2479464f420602229fc)
CVE-2025-37974
Signed-off-by: Massimiliano Pellizzer <massimiliano.pellizzer@canonical.com>
Acked-by: Edoardo Canepa <edoardo.canepa@canonical.com>
Acked-by: Manuel Diewald <manuel.diewald@canonical.com>
Acked-by: Mehmet Basaran <mehmet.basaran@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Niklas Schnelle
2025-06-12 19:43:04 +02:00
committed by Mehmet Basaran
parent 4fce372934
commit 6e3f0df4d4
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/s390/pci/pci_clp.c
+2
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@@ -422,6 +422,8 @@ static void __clp_add(struct clp_fh_list_entry *entry, void *data)
return;
}
zdev = zpci_create_device(entry->fid, entry->fh, entry->config_state);
if (IS_ERR(zdev))
return;
list_add_tail(&zdev->entry, scan_list);
}