On Mon, Apr 5, 2021 at 5:45 PM syzbot <syzbot+80a4f8091f8d5ba51de9@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: d19cc4bf Merge tag 'trace-v5.12-rc5' of git://git.kernel.o.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=14898326d00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d1a3d65a48dbd1bc > dashboard link: https://syzkaller.appspot.com/bug?extid=80a4f8091f8d5ba51de9 > > Unfortunately, I don't have any reproducer for this issue yet. > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+80a4f8091f8d5ba51de9@xxxxxxxxxxxxxxxxxxxxxxxxx #syz dup: WARNING: suspicious RCU usage in getname_flags > ============================= > WARNING: suspicious RCU usage > 5.12.0-rc5-syzkaller #0 Not tainted > ----------------------------- > kernel/sched/core.c:8294 Illegal context switch in RCU-bh read-side critical section! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 0 > no locks held by syz-executor.3/8407. > > stack backtrace: > CPU: 0 PID: 8407 Comm: syz-executor.3 Not tainted 5.12.0-rc5-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:79 [inline] > dump_stack+0x141/0x1d7 lib/dump_stack.c:120 > ___might_sleep+0x229/0x2c0 kernel/sched/core.c:8294 > lock_sock_nested+0x25/0x120 net/core/sock.c:3062 > lock_sock include/net/sock.h:1600 [inline] > do_ip_getsockopt+0x227/0x18e0 net/ipv4/ip_sockglue.c:1536 > ip_getsockopt+0x84/0x1c0 net/ipv4/ip_sockglue.c:1761 > tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4239 > __sys_getsockopt+0x21f/0x5f0 net/socket.c:2161 > __do_sys_getsockopt net/socket.c:2176 [inline] > __se_sys_getsockopt net/socket.c:2173 [inline] > __x64_sys_getsockopt+0xba/0x150 net/socket.c:2173 > do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x467a6a > Code: 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffc76a6a848 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 > RAX: ffffffffffffffda RBX: 00007ffc76a6a85c RCX: 0000000000467a6a > RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 > RBP: 0000000000000003 R08: 00007ffc76a6a85c R09: 00007ffc76a6a8c0 > R10: 00007ffc76a6a860 R11: 0000000000000246 R12: 00007ffc76a6a860 > R13: 000000000005ecdc R14: 0000000000000000 R15: 00007ffc76a6afd0 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000ce66e005bf3b9531%40google.com.
