Re: [Xenomai-core] proc_file_read: Apparent buffer overflow
Stefan Kisdaroczi wrote: > Am 10.03.2010 19:56, schrieb Stefan Kisdaroczi: >> Hi, >> >> cat /proc/xenomai/heap returns the first 4096 Bytes and fails then with "Bad >> address". >> On the console I see: "proc_file_read: Apparent buffer overflow!" >> >> xeno 2.5.1, linux 2.6.32.8, x86 32bit UP, native skin, lot of rt_queues: >> # ls -1 /proc/xenomai/registry/native/queues/ | wc -l >> 233 >> # ls -1 /proc/xenomai/registry/native/heaps/ | wc -l >> 26 > > With some luck i get a oops doing cat /proc/xenomai/heap. > Looking at the while() loop in heap_read_proc() in ksrc/nucleus/heap.c > its obvious. You mean because "count" isn't checked while the output page is filled? Well, looks like converting the heap proc interface to the seq API is a good idea. References can be found in ksrc/nucleus/sched.c, patches are welcome. :) Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] proc_file_read: Apparent buffer overflow
Am 10.03.2010 19:56, schrieb Stefan Kisdaroczi: > Hi, > > cat /proc/xenomai/heap returns the first 4096 Bytes and fails then with "Bad > address". > On the console I see: "proc_file_read: Apparent buffer overflow!" > > xeno 2.5.1, linux 2.6.32.8, x86 32bit UP, native skin, lot of rt_queues: > # ls -1 /proc/xenomai/registry/native/queues/ | wc -l > 233 > # ls -1 /proc/xenomai/registry/native/heaps/ | wc -l > 26 With some luck i get a oops doing cat /proc/xenomai/heap. Looking at the while() loop in heap_read_proc() in ksrc/nucleus/heap.c its obvious. Stefan signature.asc Description: OpenPGP digital signature ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
[Xenomai-core] proc_file_read: Apparent buffer overflow
Hi, cat /proc/xenomai/heap returns the first 4096 Bytes and fails then with "Bad address". On the console I see: "proc_file_read: Apparent buffer overflow!" xeno 2.5.1, linux 2.6.32.8, x86 32bit UP, native skin, lot of rt_queues: # ls -1 /proc/xenomai/registry/native/queues/ | wc -l 233 # ls -1 /proc/xenomai/registry/native/heaps/ | wc -l 26 regards Stefan signature.asc Description: OpenPGP digital signature ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
