Hi! 2024-10-07 at 10:37, Matteo Martelli wrote: > Some iio drivers currently share an available info list buffer that > might be changed while iio core prints it to sysfs. This could cause the > buffer shared with iio core to be corrupted. However, note that I was > able to trigger the race condition only by adding a delay between each > sysfs_emit_at calls in the iio_format_list() to force the concurrent > access to the shared available list buffer. > > This patch set extends the iio APIs and fixes some affected drivers. > > Summary: > - Patch 1: iio core: introduce a iio info release callback to let > drivers share a copy of their available info list and later free it. > > - Patch 2: pac1921: handle the current scale available info via the > read_avail+read_avail_release_resource APIs instead of using an ad-hoc > ext_info attribute. The latter was used to avoid the risk of a race in > the available list. > > - Patch 3,4: ad7192, as73211: fix the possible race in the drivers by > copying/releasing the affected available lists. > > - Patch 5: inkern: make consumers copy and release the available info > lists of their producers, necessary after patch 1. > > - Patch 6,7: iio-mux, iio-rescale, dpot-dac, ingenic-battery: adapt > consumers to inkern API change by freeing the now copied available > lists of their producers. The series not bisectable because of leaks. I'm not certain if a simple reordering is all that is needed or if some things have to be squashed? Cheers, Peter
