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(parent: b320789) | patch
smb: client: Fix NULL pointer dereference in cifs_debug_dirs_proc_show()
authorWang Zhaolong <wangzhaolong@huaweicloud.com>
Fri, 29 Aug 2025 00:59:59 +0000 (08:59 +0800)
committerSteve French <stfrench@microsoft.com>
Sun, 31 Aug 2025 22:46:57 +0000 (17:46 -0500)
commit6976c7a69dafbb34a0d4814e2def9d3d7114836d
treef75ed457abfa4afd783dfb7f4936aa89b4a7748ctree
parentb320789d6883cc00ac78ce83bccbfe7ed58afcf0commit | diff
smb: client: Fix NULL pointer dereference in cifs_debug_dirs_proc_show()

Reading /proc/fs/cifs/open_dirs may hit a NULL dereference when
tcon->cfids is NULL.

Add NULL check before accessing cfids to prevent the crash.

Reproduction:
- Mount CIFS share
- cat /proc/fs/cifs/open_dirs

Fixes: 844e5c0eb176 ("smb3 client: add way to show directory leases for improved debugging")
Signed-off-by: Wang Zhaolong <wangzhaolong@huaweicloud.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
fs/smb/client/cifs_debug.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)