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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d7b8f8e20813 Linux 6.16-rc5 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=107f9582580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f6cfc97245100778 dashboard link: https://syzkaller.appspot.com/bug?extid=97bf275720e06ad75f63 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b6728c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12aac28c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/147c9de5b1eb/disk-d7b8f8e2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f6b4ca03edae/vmlinux-d7b8f8e2.xz kernel image: https://storage.googleapis.com/syzbot-assets/0c7e75a248fb/bzImage-d7b8f8e2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+97bf275720e06ad75f63@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5851 at kernel/softirq.c:387 __local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:387 Modules linked in: CPU: 0 UID: 0 PID: 5851 Comm: krxrpcio/7001 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:387 Code: 48 3b 44 24 48 75 57 48 8d 65 e0 5b 41 5c 41 5e 41 5f 5d e9 ed 9f 8a ff cc 90 0f 0b 90 e9 f9 fe ff ff e8 53 00 00 00 eb 9f 90 <0f> 0b 90 e9 24 ff ff ff 48 c7 c1 30 17 a2 8f 80 e1 07 80 c1 03 38 RSP: 0018:ffffc9000403f4c0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000201 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff89de65e3 RBP: ffffc9000403f548 R08: ffff8880b863bf03 R09: 1ffff110170c77e0 R10: dffffc0000000000 R11: ffffed10170c77e1 R12: ffff8880b863bf00 R13: ffff888076c09570 R14: dffffc0000000000 R15: 1ffff92000807e98 FS: 0000000000000000(0000) GS:ffff888125c1d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563736fd8000 CR3: 00000000738cd000 CR4: 0000000000350ef0 Call Trace: spin_unlock_bh include/linux/spinlock.h:396 [inline] rt_add_uncached_list net/ipv4/route.c:1526 [inline] rt_set_nexthop+0x693/0xa80 net/ipv4/route.c:-1 __mkroute_output net/ipv4/route.c:2669 [inline] ip_route_output_key_hash_rcu+0x18f6/0x23a0 net/ipv4/route.c:2864 ip_route_output_key_hash+0x1b9/0x2e0 net/ipv4/route.c:2694 __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2921 ip_route_output_ports include/net/route.h:213 [inline] rxrpc_assess_MTU_size net/rxrpc/peer_object.c:174 [inline] rxrpc_init_peer+0x50a/0xc60 net/rxrpc/peer_object.c:281 rxrpc_new_incoming_peer+0x281/0x5a0 net/rxrpc/peer_object.c:325 rxrpc_alloc_incoming_call net/rxrpc/call_accept.c:284 [inline] rxrpc_new_incoming_call+0x612/0x14f0 net/rxrpc/call_accept.c:377 rxrpc_input_packet net/rxrpc/io_thread.c:310 [inline] rxrpc_io_thread+0x18b2/0x2cd0 net/rxrpc/io_thread.c:482 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup