On Fri, 29 May 2026 19:07:22 +0530 Venkat Rao Bagalkote <[email protected]> wrote:
> On 29/05/26 12:20 pm, Venkat Rao Bagalkote wrote: > > Greetings!!! > > > > Kernel 7.1.0-rc5-next-20260528 crashes randomly on IBM Power11 > > hardware. Attached is the config file. > > . > > Git bisect is pointing to 54067bacb49c selinux: hooks: use __getname() > to allocate path buffer as the first bad commit. > > > # git bisect good > 54067bacb49caeada82b20b6bd706dca0cb99ffc is the first bad commit > commit 54067bacb49caeada82b20b6bd706dca0cb99ffc > Author: Mike Rapoport (Microsoft) <[email protected]> > Date: Wed May 20 11:18:56 2026 +0300 > > selinux: hooks: use __getname() to allocate path buffer > > selinux_genfs_get_sid() allocates memory for a path with > __get_free_page() > although there is a dedicated helper for allocation of file paths: > __getname(). > > Replace __get_free_page() for allocation of a path buffer with > __getname(). > > Signed-off-by: Mike Rapoport (Microsoft) <[email protected]> > Signed-off-by: Paul Moore <[email protected]> > > security/selinux/hooks.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) __getname() is kmalloc(PATH_MAX) aka kmalloc(4096). The old code was: buffer = (char *)__get_free_page(GFP_KERNEL); if (!buffer) return -ENOMEM; path = dentry_path_raw(dentry, buffer, PAGE_SIZE); only the allocate was changed. PAGE_SIZE is not the length of the buffer. Should be PATH_MAX. -- David
