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affs: initialize fsdata in affs_truncate() 

BugLink: https://bugs.launchpad.net/bugs/2011226

[ Upstream commit eef034ac6690118c88f357b00e2b3239c9d8575d ]

When aops->write_begin() does not initialize fsdata, KMSAN may report
an error passing the latter to aops->write_end().

Fix this by unconditionally initializing fsdata.

Fixes: f2b6a16eb8 ("fs: affs convert to new aops")
Suggested-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger@canonical.com>
Acked-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
This commit is contained in:
Alexander Potapenko 2023-01-10 13:49:30 +01:00 committed by Stefan Bader
parent db882e8a98
commit cd33434790
1 changed files with 1 additions and 1 deletions
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2
fs/affs/file.c
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@ -878,7 +878,7 @@ affs_truncate(struct inode *inode)
if (inode->i_size > AFFS_I(inode)->mmu_private) { if (inode->i_size > AFFS_I(inode)->mmu_private) {
struct address_space *mapping = inode->i_mapping; struct address_space *mapping = inode->i_mapping;
struct page *page; struct page *page;
void *fsdata; void *fsdata = NULL;
loff_t isize = inode->i_size; loff_t isize = inode->i_size;
int res; int res;