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0bc8061ffc
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: |
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|---|---|---|
| .. | ||
| compress.h | ||
| data.c | ||
| decompressor_deflate.c | ||
| decompressor_lzma.c | ||
| decompressor_zstd.c | ||
| decompressor.c | ||
| dir.c | ||
| erofs_fs.h | ||
| fileio.c | ||
| fscache.c | ||
| inode.c | ||
| internal.h | ||
| Kconfig | ||
| Makefile | ||
| namei.c | ||
| super.c | ||
| sysfs.c | ||
| xattr.c | ||
| xattr.h | ||
| zdata.c | ||
| zmap.c | ||
| zutil.c | ||