On Thu, Mar 05, 2026 at 03:33:43PM +0800, Jiayuan Chen wrote: > From: Jiayuan Chen <[email protected]> > > Syzbot reported a warning in u32_init_knode() [1]. > > Similar to commit 7cba18332e36 ("net: sched: cls_u32: Avoid memcpy() > false-positive warning") which addressed the same issue in u32_change(), > use unsafe_memcpy() in u32_init_knode() to work around the compiler's > inability to see into composite flexible array structs. > > This silences the false-positive reported by syzbot: > > memcpy: detected field-spanning write (size 32) of single field > "&new->sel" at net/sched/cls_u32.c:855 (size 16) > > Since the memory is correctly allocated with kzalloc_flex() using > s->nkeys, this is purely a false positive and does not need a Fixes tag. > > [1] https://syzkaller.appspot.com/bug?extid=d5ace703ed883df56e42 > > Reported-by: [email protected] > Closes: > https://lore.kernel.org/all/[email protected]/T/ > Signed-off-by: Jiayuan Chen <[email protected]> > Made-with: Cursor
FWIIW, Made-with is a new tag to me, I would have expected Assisted-by. That notwithstanding, this looks good to me. Reviewed-by: Simon Horman <[email protected]>
