On Wed, Apr 03, 2024 at 05:36:18PM +0800, Herbert Xu wrote: > On Mon, Apr 01, 2024 at 07:08:28AM -0700, syzbot wrote: > > > > syzbot found the following issue on: > > > > HEAD commit: 18737353cca0 Merge tag 'edac_urgent_for_v6.9_rc2' of git:/.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=15d605e5180000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=f64ec427e98bccd7 > > dashboard link: https://syzkaller.appspot.com/bug?extid=0cb5bb0f4bf9e79db3b3 > > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > Strictly speaking this can't happen because for the time being > padata_do_multithreaded cannot run at the same time as the old > padata which occurs in BH context. > > But the simplest fix is to just disable BH: > > ---8<--- > As the old padata code can execute in softirq context, disable > softirqs for the new padata_do_mutithreaded code too as otherwise > lockdep will get antsy. > > Reported-by: syzbot+0cb5bb0f4bf9e79db3b3@xxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Acked-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
