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Message-Id: <1410732864-53069-1-git-send-email-jaegeuk@kernel.org> Date: Sun, 14 Sep 2014 15:14:15 -0700 From: Jaegeuk Kim <jaegeuk@...nel.org> To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net Cc: Jaegeuk Kim <jaegeuk@...nel.org> Subject: [PATCH 01/10] 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@...il.com> [Jaegeuk Kim: relocate the condition as suggested by Chao] Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org> --- fs/f2fs/file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 9f0ea3d..5cde363 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -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); } -- 1.8.5.2 (Apple Git-48) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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