syzbot

BUG: assuming non migratable context at include/linux/filter.h:599
in_atomic(): 0, irqs_disabled(): 0, migration_disabled() 0 pid: 20767, name: syz.5.4130
2 locks held by syz.5.4130/20767:
 #0: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: ip6_send_skb+0x10f/0x380 net/ipv6/ip6_output.c:2037
 #1: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #1: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #1: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: nf_hook+0x9e/0x370 include/linux/netfilter.h:228
CPU: 0 PID: 20767 Comm: syz.5.4130 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
 __cant_migrate+0x234/0x2e0 kernel/sched/core.c:10269
 __bpf_prog_run include/linux/filter.h:599 [inline]
 bpf_prog_run include/linux/filter.h:619 [inline]
 nf_hook_run_bpf+0x90/0x1e0 net/netfilter/nf_bpf_link.c:20
 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
 nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
 nf_hook+0x215/0x370 include/linux/netfilter.h:259
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip6_output+0x272/0x3b0 net/ipv6/ip6_output.c:240
 ip6_send_skb+0x1d5/0x380 net/ipv6/ip6_output.c:2038
 udp_v6_send_skb+0xbbb/0x1860 net/ipv6/udp.c:1295
 udpv6_sendmsg+0x1bb8/0x22f0 net/ipv6/udp.c:1591
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x46a/0x620 net/socket.c:2201
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0xf0 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f93a678ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f93a76cc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f93a69b5fa0 RCX: 00007f93a678ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f93a6811e19 R08: 0000200000000300 R09: 000000000000001c
R10: 0000000020000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f93a69b6038 R14: 00007f93a69b5fa0 R15: 00007ffd81a3b548
 </TASK>