----- Ursprüngliche Mail ----- > Von: "Joakim Tjernlund" <[email protected]> > An: "menglong8 dong" <[email protected]>, "David Woodhouse" > <[email protected]> > CC: "yang yang29" <[email protected]>, "stable" > <[email protected]>, "linux-kernel" > <[email protected]>, "richard" <[email protected]>, "linux-mtd" > <[email protected]> > Gesendet: Donnerstag, 28. Januar 2021 12:17:34 > Betreff: Re: [PATCH] jffs2: check the validity of dstlen in > jffs2_zlib_compress()
> On Thu, 2021-01-28 at 02:55 -0800, [email protected] wrote: >> From: Yang Yang <[email protected]> >> >> KASAN reports a BUG when download file in jffs2 filesystem.It is >> because when dstlen == 1, cpage_out will write array out of bounds. >> Actually, data will not be compressed in jffs2_zlib_compress() if >> data's length less than 4. > > Ouch, data corruption will ensue. Good find! > I think this needs to go to stable as well. Indeed! Do you know whether this is a regression? Seems to be like that since ever. Thanks, //richard
