Solaris 10 crashing in 'ip'module

Hi guys,
it crashed randomly twice, here is the stack:
> ::stack
tcp_fuse_rcv_drain+0x1d4(60031b80858, 60031b2c980, 0, 600222ee000, 600222ef0d0, 0)
tcp_fuse_output+0xc90(0, bc823621, 5d52100d, 0, 5, 60031b2c980)
tcp_output+0x74(6002f6c2040, 6002785dc80, 0, 0, 1, 80)
squeue_enter+0x74(600222ed9c0, 6002785dc80, 7bad18a8, 6002f6c1e40, 7, 0)
putnext+0x218(6002bc55eb0, 6002bc55db8, 6002785dc80, 100, 6002839e8f0, 0)
putnext+0x218(6002839e9e8, 6002839e8f0, 6002785dc80, 0, 6002d6df678, 0)
strput+0x1d8(6002d6bbdd0, 0, 2a100cc1a98, 2a100cc1920, 0, 0)
strwrite_common+0x21c(6002ce436c0, 2a100cc1a98, 2000, 0, 0, 1000000)
fop_write+0x20(6002ce436c0, 2a100cc1a98, 0, 6002bd62868, 0, 129e538)
write+0x268(18, 8058, 6002a050b98, 2, 7, 1)