On Fri, Mar 02, 2007 at 12:58:33AM -0800, Andrew Morton wrote: > > -mm has a debugging patch which warns when atomic_dec_and_test() takes an > atomic_t negative > (ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20/2.6.20-mm2/broken-out/detect-atomic-counter-underflows.patch). > > > When it is applied to current mainline, a simple `rmmod ipw2200' gives: > > [ 75.825072] BUG: atomic counter underflow at: > [ 75.825180] [<c01c6eb4>] kref_put+0x66/0x82 > [ 75.825278] [<c022e4d4>] bus_remove_driver+0x66/0x75 > [ 75.825383] [<c022ee2c>] driver_unregister+0x8/0x13 > [ 75.825484] [<c01d7add>] pci_unregister_driver+0xc/0x45 > [ 75.825593] [<c0132147>] sys_delete_module+0x157/0x17c > [ 75.825703] [<c013c663>] audit_syscall_entry+0x10d/0x137 > [ 75.825818] [<c0103b14>] syscall_call+0x7/0xb > [ 75.825913] [<c02d0000>] xfrm4_dst_destroy+0xe/0xd5 > > This didn't happen in 2.6.20-mm2, so this bug was introduced by a patch > which was not in the -mm lineup twelve days ago. > > Presumably the effect of this is a memory leak or a use-after-free.
Ugh. I'll add it to my local tree here and try to bisect to find the problem. thanks for the pointer, greg k-h - 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/
