udf: Fix lost indirect extent block (6c371578) · Commits · 戴 / test

When inode ends with empty indirect extent block and we extended that file, udf_do_extend_file() ended up just overwriting pointer to it with another extent and thus effectively leaking the block and also corruptiong length of allocation descriptors. Fix the problem by properly following into next indirect extent when it is present. Signed-off-by:

Jan Kara <jack@suse.cz>

fs/udf/inode.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -539,9 +539,18 @@ static int udf_do_extend_file(struct inode *inode,
		udf_add_aext(inode, last_pos, &last_ext->extLocation,
		last_ext->extLength, 1);
		count++;
		} else
		} else {
		struct kernel_lb_addr tmploc;
		uint32_t tmplen;

		udf_write_aext(inode, last_pos, &last_ext->extLocation,
		last_ext->extLength, 1);
		/*
		* We've rewritten the last extent but there may be empty
		* indirect extent after it - enter it.
		*/
		udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
		}

		/* Managed to do everything necessary? */
		if (!blocks)

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