Gao Xiang dcbe6803ff erofs: fix buffer copy overflow of ztailpacking feature ... I got some KASAN report as below: [ 46.959738] ================================================================== [ 46.960430] BUG: KASAN: use-after-free in z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188 ... [ 46.960430] Call Trace: [ 46.960430] <TASK> [ 46.960430] dump_stack_lvl+0x41/0x5e [ 46.960430] print_report.cold+0xb2/0x6b7 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_report+0x8a/0x140 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_check_range+0x14d/0x1d0 [ 46.960430] memcpy+0x20/0x60 [ 46.960430] z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] z_erofs_decompress_pcluster+0xaae/0x1080 The root cause is that the tail pcluster won't be a complete filesystem block anymore. So if ztailpacking is used, the second part of an uncompressed tail pcluster may not be ``rq->pageofs_out``. Fixes: ab749badf9 ("erofs: support unaligned data decompression") Fixes: cecf864d3d ("erofs: support inline data decompression") Reviewed-by: Yue Hu <huyue2@coolpad.com> Reviewed-by: Chao Yu <chao@kernel.org> Link: https://lore.kernel.org/r/20220512115833.24175-1-hsiangkao@linux.alibaba.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>		2022-05-17 23:38:14 +08:00
..
compress.h	erofs: introduce z_erofs_fixup_insize	2021-12-29 06:42:07 +08:00
data.c	erofs: use meta buffers for reading directories	2022-03-17 00:09:02 +08:00
decompressor_lzma.c	erofs: introduce z_erofs_fixup_insize	2021-12-29 06:42:07 +08:00
decompressor.c	erofs: fix buffer copy overflow of ztailpacking feature	2022-05-17 23:38:14 +08:00
dir.c	erofs: use meta buffers for reading directories	2022-03-17 00:09:02 +08:00
erofs_fs.h	erofs: refine on-disk definition comments	2022-05-17 23:38:13 +08:00
inode.c	erofs: remove obsoleted comments	2022-05-17 23:38:13 +08:00
internal.h	erofs: remove obsoleted comments	2022-05-17 23:38:13 +08:00
Kconfig	erofs: lzma compression support	2021-10-19 23:44:30 +08:00
Makefile	erofs: add sysfs interface	2021-12-08 09:40:37 +08:00
namei.c	erofs: use meta buffers for inode lookup	2022-03-17 00:09:02 +08:00
pcpubuf.c	erofs: get rid of ->lru usage	2021-10-25 08:22:59 +08:00
super.c	Filesystem folio changes for 5.18	2022-03-22 18:26:56 -07:00
sysfs.c	fs: erofs: add sanity check for kobject in erofs_unregister_sysfs	2022-03-17 00:09:02 +08:00
tagptr.h	erofs: clean up file headers & footers	2021-06-08 00:41:24 +08:00
utils.c	erofs: fix deadlock when shrink erofs slab	2021-11-23 14:58:16 +08:00
xattr.c	erofs: use meta buffers for xattr operations	2022-01-04 23:47:08 +08:00
xattr.h	erofs: use meta buffers for xattr operations	2022-01-04 23:47:08 +08:00
zdata.c	erofs: fix use-after-free of on-stack io[]	2022-04-15 23:51:43 +08:00
zdata.h	erofs: fix use-after-free of on-stack io[]	2022-04-15 23:51:43 +08:00
zmap.c	erofs: clean up z_erofs_extent_lookback	2022-03-17 00:08:48 +08:00
zpvec.h	erofs: fix unsafe pagevec reuse of hooked pclusters	2021-11-08 10:02:10 +08:00