Hello Sascha, On 9/15/20 9:12 AM, Sascha Hauer wrote: > On Tue, Sep 15, 2020 at 07:25:15AM +0200, Ahmad Fatoum wrote: >> Hello Sascha, >> >> On 9/14/20 3:06 PM, Sascha Hauer wrote: >>> So far we only ever freed dentries when the filesystem they are on is >>> unmounted. With this patch we actually trust reference counting and free >>> the dentries once the reference count hits zero. >> >> Unless I revert this patch, I run into a crash doing: >> >> dd if=/dev/zero of=barebox.env count=1 >> ./barebox --image=barebox.env >> barebox@barebox sandbox:/ saveenv >> saving environment > > "saveenv" answers with: "saveenv: No such file or directory". Did you > mean to do a "saveenv /dev/fd0"? > >> barebox@barebox sandbox:/ reset >> ================================================================= >> ==894761==ERROR: AddressSanitizer: heap-use-after-free on address 0x60e000005d70 at pc 0x5617cfde210a bp 0x7ffff89957d0 sp 0x7ffff89957c8 > > I can't reproduce this here unfortunately. Sorry, should've been ./barebox --env=barebox.env I can reproduce it with upstream/next (91a23b64445b8861acbfd96fcc03082b343b0211) and sandbox_defconfig (+CONFIG_RESET). saveenv; reset results in a segmentation fault. CONFIG_KASAN=y CONFIG_MALLOC_LIBC=y gives the better debugging output. Cheers, Ahmad > > Sascha > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
