On Wed, 09 May 2007 16:52:41 -0700 Jeremy Fitzhardinge <[EMAIL PROTECTED]> wrote:
> Seems to be getting a 0 refcount. I don't see anything in the recent > changes which might cause this, but this is relatively new behaviour. > It was working for me in the 2.6.21-pre time period, but I haven't tried > this since 2.6.21 was released. > > The BUG is actually triggered by the __module_get(THIS_MODULE) in > loop_set_fd. > > J > > loop: module loaded > device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: [EMAIL PROTECTED] > ------------[ cut here ]------------ > kernel BUG at /home/jeremy/hg/xen/paravirt/linux/include/linux/module.h:396! > invalid opcode: 0000 [#1] > PREEMPT SMP > Modules linked in: dm_snapshot dm_mod loop > CPU: 1 > EIP: 0061:[<d085a911>] Not tainted VLI > EFLAGS: 00010246 (2.6.21-paravirt #1339) > EIP is at lo_ioctl+0x65/0xa52 [loop] > eax: 00000000 ebx: cfb92c98 ecx: d085e480 edx: 00000200 > esi: 00004c00 edi: cf8ad428 ebp: cf37fdc0 esp: cf37fbf8 > ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0069 > Process losetup (pid: 440, ti=cf37e000 task=cf30b4d0 task.ti=cf37e000) > Stack: c1390080 c1390080 cf37fc10 00000008 cf8ad428 cfbb2258 00000000 > cf37fc34 > c01458c5 cfb92c98 c1392a40 cf30ba70 cf30b4d0 cf30ba54 00000002 > cf30ba70 > cf30b4d0 cf30ba54 00000002 00000003 c134c088 c134c088 cf37fc90 > c01215b8 > Call Trace: > [<c0109173>] show_trace_log_lvl+0x1a/0x30 > [<c0109226>] show_stack_log_lvl+0x9d/0xa5 > [<c0109425>] show_registers+0x1f7/0x336 > [<c010967d>] die+0x119/0x21b > [<c0382c78>] do_trap+0x8a/0xa4 > [<c0109ad1>] do_invalid_op+0x88/0x92 > [<c0382a42>] error_code+0x72/0x78 > [<c0211c79>] blkdev_driver_ioctl+0x4c/0x5d > [<c02123de>] blkdev_ioctl+0x754/0x7a2 > [<c0198840>] block_ioctl+0x1b/0x1f > [<c0182e2e>] do_ioctl+0x22/0x68 > [<c01830a6>] vfs_ioctl+0x232/0x245 > [<c0183102>] sys_ioctl+0x49/0x63 > [<c0108080>] syscall_call+0x7/0xb > ======================= > Code: ff 83 f8 06 0f 87 5a 09 00 00 ff 24 85 5c bc 85 d0 8b 9b cc 01 00 00 b8 > 80 e4 85 d0 89 9d 5c fe ff ff e8 37 0a 8f ef 85 c0 75 04 <0f> 0b eb fe b8 01 > 00 00 00 e8 79 9f 8c ef e8 ec 4b 9c ef c1 e0 > EIP: [<d085a911>] lo_ioctl+0x65/0xa52 [loop] SS:ESP 0069:cf37fbf8 > A few people have been playing with module refcounting lately. Did you work out a reproduce-it recipe? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
