The current fat_write_failed() implementation calls into fat_truncate_blocks() without holding truncate_lock. Make it so it is held exclusive while truncating. Fixes: 459f6ed3b8c7 ("fat: convert to use the new truncate convention.") Signed-off-by: Matheus Alves de Almeida --- fs/fat/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 141276fcf8db..2a16ed415631 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -216,7 +216,9 @@ static void fat_write_failed(struct address_space *mapping, loff_t to) if (to > inode->i_size) { truncate_pagecache(inode, inode->i_size); + down_write(&MSDOS_I(inode)->truncate_lock); fat_truncate_blocks(inode, inode->i_size); + up_write(&MSDOS_I(inode)->truncate_lock); } } -- 2.43.0