Gao Xiang 0bc8061ffc erofs: handle NONHEAD !delta[1] lclusters gracefully ... syzbot reported a WARNING in iomap_iter_done: iomap_fiemap+0x73b/0x9b0 fs/iomap/fiemap.c:80 ioctl_fiemap fs/ioctl.c:220 [inline] Generally, NONHEAD lclusters won't have delta[1]==0, except for crafted images and filesystems created by pre-1.0 mkfs versions. Previously, it would immediately bail out if delta[1]==0, which led to inadequate decompressed lengths (thus FIEMAP is impacted). Treat it as delta[1]=1 to work around these legacy mkfs versions. `lclusterbits > 14` is illegal for compact indexes, error out too. Reported-by: syzbot+6c0b301317aa0156f9eb@syzkaller.appspotmail.com Closes: https://lore.kernel.org/r/67373c0c.050a0220.2a2fcc.0079.GAE@google.com Tested-by: syzbot+6c0b301317aa0156f9eb@syzkaller.appspotmail.com Fixes: d95ae5e253 ("erofs: add support for the full decompressed length") Fixes: 001b8ccd06 ("erofs: fix compact 4B support for 16k block size") Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Link: https://lore.kernel.org/r/20241115173651.3339514-1-hsiangkao@linux.alibaba.com		2024-11-18 18:50:14 +08:00
..
compress.h	erofs: avoid refcounting short-lived pages	2024-07-11 15:14:26 +08:00
data.c	erofs: clarify direct I/O support	2024-11-18 18:50:14 +08:00
decompressor_deflate.c	erofs: tidy up stream decompressors	2024-07-09 19:04:41 +08:00
decompressor_lzma.c	erofs: convert comma to semicolon	2024-07-26 18:48:12 +08:00
decompressor_zstd.c	erofs: tidy up stream decompressors	2024-07-09 19:04:41 +08:00
decompressor.c	erofs: fix error handling in z_erofs_init_decompressor	2024-09-10 00:46:34 +08:00
dir.c	erofs: simplify readdir operation	2024-08-19 11:06:20 +08:00
erofs_fs.h	erofs: restrict pcluster size limitations	2024-09-12 23:00:09 +08:00
fileio.c	erofs: support compressed inodes for fileio	2024-09-10 15:27:09 +08:00
fscache.c	erofs: don't align offset for erofs_read_metabuf() (simple cases)	2024-05-18 01:47:26 +08:00
inode.c	erofs: clarify direct I/O support	2024-11-18 18:50:14 +08:00
internal.h	erofs: get rid of buf->kmap_type	2024-11-18 18:50:14 +08:00
Kconfig	erofs: mark experimental fscache backend deprecated	2024-09-10 15:27:11 +08:00
Makefile	erofs: support unencoded inodes for fileio	2024-09-10 15:26:36 +08:00
namei.c	erofs_buf: store address_space instead of inode	2024-04-25 00:57:14 -04:00
super.c	erofs: fix blksize < PAGE_SIZE for file-backed mounts	2024-11-18 18:50:14 +08:00
sysfs.c	erofs: add sysfs node to drop internal caches	2024-11-18 18:50:13 +08:00
xattr.c	erofs_buf: store address_space instead of inode	2024-04-25 00:57:14 -04:00
xattr.h	erofs: move erofs_xattr_handlers and xattr_handler_map to .rodata	2023-10-09 16:24:17 +02:00
zdata.c	erofs: add sysfs node to drop internal caches	2024-11-18 18:50:13 +08:00
zmap.c	erofs: handle NONHEAD !delta[1] lclusters gracefully	2024-11-18 18:50:14 +08:00
zutil.c	erofs: move erofs_workgroup operations into zdata.c	2024-11-18 18:50:12 +08:00