Commit 0b4c5afd authored Sep 08, 2014 by Jaegeuk Kim

f2fs: fix negative value for lseek offset



If application throws negative value of lseek with SEEK_DATA|SEEK_HOLE,
previous f2fs went into BUG_ON in get_dnode_of_data, which was reported
by Tommi Rantala.

He could make a simple code to detect this having:
	lseek(fd, -17595150933902LL, SEEK_DATA);

This patch should resolve that bug.

Reported-by: Tommi Rentala <tt.rantala@gmail.com>
[Jaegeuk Kim: relocate the condition as suggested by Chao]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 9a01b56b

fs/f2fs/file.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -353,6 +353,8 @@ static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
		maxbytes, i_size_read(inode));
		case SEEK_DATA:
		case SEEK_HOLE:
		if (offset < 0)
		return -ENXIO;
		return f2fs_seek_block(file, offset, whence);
		}

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