On Wed, Dec 01, 2021 at 12:50:07PM -0800, syzbot wrote: > syzbot suspects this issue was fixed by commit: > > commit 96017bf9039763a2e02dcc6adaa18592cd73a39d > Author: Paul E. McKenney <paulmck@xxxxxxxxxx> > Date: Wed Jul 28 17:53:41 2021 +0000 > > rcu-tasks: Simplify trc_read_check_handler() atomic operations > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1281d89db00000 > start commit: 5319255b8df9 selftests/bpf: Skip verifier tests that fail .. > git tree: bpf-next > kernel config: https://syzkaller.appspot.com/x/.config?x=9290a409049988d4 > dashboard link: https://syzkaller.appspot.com/bug?extid=fe9d8c955bd1d0f02dc1 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14990477300000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=105ebd84b00000 > > If the result looks correct, please mark the issue as fixed by replying with: #syz fix: rcu-tasks: Simplify trc_read_check_handler() atomic operations > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Give or take. There were quite a few related bugs, so some or all of the following commits might also have helped: cbe0d8d91415c rcu-tasks: Wait for trc_read_check_handler() IPIs 18f08e758f34e rcu-tasks: Add trc_inspect_reader() checks for exiting critical section 46aa886c483f5 rcu-tasks: Fix IPI failure handling in trc_wait_for_one_reader Quibbles aside, it is nice to get an automated email about having fixed a bug as opposed to having added one. ;-) Thanx, Paul
