Hello, syzbot found the following issue on: HEAD commit: 127c501a Merge tag '5.10-rc5-smb3-fixes' of git://git.samb.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17f4912d500000 kernel config: https://syzkaller.appspot.com/x/.config?x=6d1e98d0b97781e4 dashboard link: https://syzkaller.appspot.com/bug?extid=5cfc290df4bbf069bc65 compiler: gcc (GCC) 10.1.0-syz 20200507 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+5cfc290df4bbf069bc65@xxxxxxxxxxxxxxxxxxxxxxxxx ============================= WARNING: suspicious RCU usage 5.10.0-rc5-syzkaller #0 Not tainted ----------------------------- kernel/sched/core.c:7270 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 1 lock held by syz-executor.3/10331: #0: ffff8880459f8308 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x540 net/netfilter/x_tables.c:1206 stack backtrace: CPU: 3 PID: 10331 Comm: syz-executor.3 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 ___might_sleep+0x25d/0x2b0 kernel/sched/core.c:7270 get_counters+0x2f5/0x520 net/ipv4/netfilter/ip_tables.c:765 do_ipt_get_ctl+0x634/0x9d0 net/ipv4/netfilter/ip_tables.c:805 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3882 __sys_getsockopt+0x219/0x4c0 net/socket.c:2173 __do_sys_getsockopt net/socket.c:2188 [inline] __se_sys_getsockopt net/socket.c:2185 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2185 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ec3a Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd 9f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 aa 9f fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffccbec9f78 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffccbec9fb0 RCX: 000000000045ec3a RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000734000 R08: 00007ffccbec9fac R09: 0000000000004000 R10: 00007ffccbeca010 R11: 0000000000000212 R12: 00007ffccbeca010 R13: 0000000000000003 R14: 0000000000732bc0 R15: 0000000000000000 --- 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.
