On 10/06/2026 16:25, Mateusz Furdyna wrote: > This series fixes incomplete clearing of the IP reassembly state > (CONFIG_IP_DEFRAG): the static counters and hole list are not reset after a > reassembled datagram is handed back to the caller. A duplicated final > fragment is then processed against stale state, mis-parsing the delivered > payload as the hole list, which can lead to re-delivery or out-of-bounds > accesses. > > Patch 1 contains the fix and the full rationale; patch 2 adds a unit > test (run via "ut dm") that reproduces the duplicate-final-fragment > case and guards against regressions. > > Signed-off-by: Mateusz Furdyna <[email protected]> > --- > Changes in v2: > - correct spelling in commit msg "mistakingly" -> "mistakenly" > - net.c: fix block comment formatting > - add regression test (net_defrag.c) > - Link to v1: > https://lore.kernel.org/all/[email protected] > > To: Ben Warren <[email protected]> > To: Alessandro Rubini <[email protected]> > To: [email protected] > Cc: Jerome Forissier <[email protected]> > Cc: Tom Rini <[email protected]> > Cc: Andrew Goodbody <[email protected]> > Cc: Max Merchel <[email protected]> > Cc: Yuya Hamamachi <[email protected]> > Cc: Marek Vasut <[email protected]> > Cc: Mateusz Furdyna <[email protected]> > Cc: Quentin Schulz <[email protected]> > Cc: Alessandro Rubini <[email protected]> > Cc: Simon Glass <[email protected]> > Cc: Dinesh Maniyam <[email protected]> > Cc: Neil Armstrong <[email protected]> > Cc: Svyatoslav Ryhel <[email protected]> > Cc: Heiko Schocher <[email protected]> > Cc: "Lucien.Jheng" <[email protected]> > Cc: Rasmus Villemoes <[email protected]> > > --- > Mateusz Furdyna (2): > net: clear IP defragmentation state after returning a complete packet > test: net: add IP defragmentation duplicate-fragment regression test > > net/net.c | 9 ++++++ > test/dm/Makefile | 1 + > test/dm/net_defrag.c | 82 > ++++++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 92 insertions(+) > --- > base-commit: 30b77f6aa146c96b831cb4ece038130b655b6a41 > change-id: 20260530-ip_defrag-130c345dd9db > > Best regards, > -- > Mateusz Furdyna <[email protected]> >
Series added to my net queue for master, thanks! -- Jerome
