On Mon, Apr 9, 2018 at 4:25 PM, Jan Kara <j...@suse.cz> wrote: > On Wed 04-04-18 21:48:53, Jeff Mahoney wrote: >> On 4/4/18 9:45 PM, Andrew Morton wrote: >> > On Wed, 4 Apr 2018 18:25:16 -0700 Randy Dunlap <rdun...@infradead.org> >> > wrote: >> > >> >> From: Randy Dunlap <rdun...@infradead.org> >> >> >> >> If the reiserfs mount option's journal name contains a '%' character, >> >> it can lead to a WARN_ONCE() in lib/vsprintf.c::format_decode(), >> >> saying: "Please remove unsupported %/ in format string." >> >> That's OK until panic_on_warn is set, at which point it's dead, Jim. >> >> >> >> To placate this situation, check the journal name string for a '%' >> >> character and return an error if one is found. Also print a warning >> >> (one that won't panic the kernel) about the invalid journal name (e.g.): >> >> >> >> reiserfs: journal device name is invalid: %/file0 >> >> >> >> (In this example, the caller app specified the journal device name as >> >> "%/file0".) >> >> >> > >> > Well, that is a valid filename and we should support it... >> > >> > Isn't the bug in journal_init_dev()? >> >> Yep. That's exactly it. >> >> Acked-by: Jeff Mahoney <je...@suse.com> > > Thanks. I've picked up the patch from Andrew, added his Signed-off-by (OK, > Andrew?), wrote a proper changelog and pushed it to my tree. The result is > attached.
Hi Jan, Please also add: Reported-by: syzbot+6bd77b88c1977c03f...@syzkaller.appspotmail.com as the original reporter.
