Al Viro e5a3449ce1 hostfs: fix memory handling in follow_link() ...

[ Upstream commit 7f6c411c9b ]

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: 52b209f7b8 ("get rid of hostfs_read_inode()")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-04-14 08:42:06 +02:00

..

hostfs_kern.c

hostfs: fix memory handling in follow_link()

2021-04-14 08:42:06 +02:00

hostfs_user.c

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hostfs.h

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Makefile

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