------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 1 PID: 19 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31 Modules linked in: CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31 Code: f4 8a 31 c0 e8 d5 46 38 fd 0f 0b e9 64 ff ff ff e8 29 6b 6e fd c6 05 a6 40 f5 09 01 48 c7 c7 80 fe f4 8a 31 c0 e8 b4 46 38 fd <0f> 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff RSP: 0018:ffffc90000d979e8 EFLAGS: 00010246 RAX: b872fa4922cec500 RBX: 0000000000000004 RCX: ffff88801247d700 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000 RBP: 0000000000000004 R08: ffffffff8169fb82 R09: ffffed10173667b1 R10: ffffed10173667b1 R11: 0000000000000000 R12: ffff88803ae146e0 R13: dffffc0000000000 R14: ffff88803ae14680 R15: ffff88808f9c45b0 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f513ab2f740 CR3: 000000001baae000 CR4: 00000000003506e0 Call Trace: __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] dev_put include/linux/netdevice.h:4166 [inline] fib_nh_common_release+0x2c4/0x2d0 net/ipv4/fib_semantics.c:211 fib_nh_release net/ipv4/fib_semantics.c:225 [inline] free_fib_info_rcu+0xe4/0x4a0 net/ipv4/fib_semantics.c:237 rcu_do_batch kernel/rcu/tree.c:2506 [inline] rcu_core+0x9b8/0x1610 kernel/rcu/tree.c:2741 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:920 smpboot_thread_fn+0x533/0x9d0 kernel/smpboot.c:164 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30