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| /openbmc/linux/fs/hostfs/ |
| H A D | hostfs_kern.c | 7f6c411c Thu Mar 25 13:12:34 CDT 2021 Al Viro <viro@zeniv.linux.org.uk> hostfs: fix memory handling in follow_link()
1) argument should not be freed in any case - the caller already has
it as ->s_fs_info (and uses it a lot afterwards)
2) allocate readlink buffer with kmalloc() - the caller has no way
to tell if it's got that (on absolute symlink) or a result of
kasprintf(). Sure, for SLAB and SLUB kfree() works on results of
kmem_cache_alloc(), but that's not documented anywhere, might change
in the future *and* is already not true for SLOB.
Fixes: 52b209f7b848 ("get rid of hostfs_read_inode()")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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