WARNING in dev_change_net

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	WARNING in dev_change_net_namespace	C		error	10	933d	1603d	0/1	upstream: reported C repro on 2020/01/13 08:39
upstream	WARNING in dev_change_net_namespace net	syz	done	done	8	925d	1573d	20/26	fixed on 2022/05/20 00:27

RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 0000000000000a19 R14: 00000000004ccfd8 R15: 00007fa343dca6d4 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 30663 at net/core/dev.c:8405 dev_change_net_namespace net/core/dev.c:8405 [inline] WARNING: CPU: 0 PID: 30663 at net/core/dev.c:8405 dev_change_net_namespace+0x83e/0x9f0 net/core/dev.c:8322 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 30663 Comm: syz-executor.0 Not tainted 4.14.183-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x2f/0x30 kernel/panic.c:547 report_bug+0x20a/0x248 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 RIP: 0010:dev_change_net_namespace net/core/dev.c:8405 [inline] RIP: 0010:dev_change_net_namespace+0x83e/0x9f0 net/core/dev.c:8322 RSP: 0018:ffff888211d27160 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff888096d1c440 RCX: ffffc90007278000 RDX: 0000000000040000 RSI: ffffffff84fe1ace RDI: 0000000000000282 RBP: ffff888096d1c380 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888096d1c428 R13: dffffc0000000000 R14: ffff888096d1c430 R15: ffffffff884d71c0 do_setlink+0xc0b/0x2d30 net/core/rtnetlink.c:1997 rtnl_newlink+0x11bb/0x1720 net/core/rtnetlink.c:2660 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x64a/0xbb0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca69 RSP: 002b:00007fa343dc9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000501700 RCX: 000000000045ca69 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 0000000000000a19 R14: 00000000004ccfd8 R15: 00007fa343dca6d4 Kernel Offset: disabled Rebooting in 86400 seconds..