On Tue, Jul 21, 2009 at 11:53:35AM -0400, Alan Stern wrote: > [ 961.903814] [<c1021755>] warn_slowpath_null+0xd/0x10 > [ 961.903907] [<c103ed98>] __lock_acquire+0x395/0xaf5 > [ 961.903999] [<c103ddb9>] ? mark_lock+0x1e/0x1e4 > [ 961.904020] [<c103f540>] lock_acquire+0x48/0x64 > [ 961.904020] [<c1126810>] ? tty_port_close_start+0x1a/0x118 > [ 961.904020] [<c11c21ef>] _spin_lock_irqsave+0x2e/0x3e > [ 961.904020] [<c1126810>] ? tty_port_close_start+0x1a/0x118 > [ 961.904020] [<c1126810>] tty_port_close_start+0x1a/0x118 > [ 961.904020] [<f09649b5>] serial_close+0x4f/0x7b [usbserial] > [ 961.904020] [<c11215e3>] tty_release_dev+0x17c/0x400 > [ 961.904020] [<c103d28e>] ? register_lock_class+0x17/0x272 > [ 961.904020] [<c1121879>] tty_release+0x12/0x1c > [ 961.904020] [<c107201f>] __fput+0xe9/0x172 > [ 961.904020] [<c10720c1>] fput+0x19/0x1c > [ 961.904020] [<c106f93c>] filp_close+0x51/0x5b > [ 961.904020] [<c106f9b0>] sys_close+0x6a/0xa4 > [ 961.904020] [<c1002a08>] sysenter_do_call+0x12/0x36 > [ 961.904020] ---[ end trace ed6ce19124f40616 ]--- > > This is only a lockdep warning, and I don't understand its > significance. Even worse, when I plugged in a USB flash drive > afterward this appeared: The problem is that freed resources are accessed, and that can lead to any kind of strange kernel faults from crashing to other subsequent errors. Did you try my patch? -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
