Gao Xiang daaf68fef4 erofs: handle NONHEAD !delta[1] lclusters gracefully ... [ Upstream commit 0bc8061ffc733a0a246b8689b2d32a3e9204f43c ] 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 Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-12-05 14:02:00 +01:00
..
compress.h	erofs: avoid refcounting short-lived pages	2024-07-11 15:14:26 +08:00
data.c	erofs: fix file-backed mounts over FUSE	2024-12-05 14:02:00 +01:00
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: reject inodes with negative i_size	2024-09-12 23:00:09 +08:00
internal.h	erofs: fix file-backed mounts over FUSE	2024-12-05 14:02:00 +01:00
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	2024-12-05 14:02:00 +01:00
sysfs.c	erofs: clean up erofs_register_sysfs()	2024-09-10 00:46:34 +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: get rid of z_erofs_try_to_claim_pcluster()	2024-10-11 13:36:58 +08:00
zmap.c	erofs: handle NONHEAD !delta[1] lclusters gracefully	2024-12-05 14:02:00 +01:00
zutil.c	erofs: fix out-of-bound access when z_erofs_gbuf_growsize() partially fails	2024-08-21 08:12:05 +08:00