(fix validation — patched sound.ko md5 a517bbe17032d9ba88046ab759e578ca, exact same PoC binary+args)
BUILD_OK
DF-4026 mmap-vs-resizebuf UAF: pid <n> attempts=3000
round 2400...
round 2500...
round 2600...
round 2700...
round 2800...
round 2900...
RESULT: no window caught in 3000 attempts
EXIT=1
--- feature preservation on patched module (/tmp/probe):
after open: size=4096
frag 16x2    arg=0x00020004 -> rc=0 size=256 (ok)
frag 64Kx2   arg=0x00020010 -> rc=0 size=131072 (ok)
mmap 128K: OK size=131072        <- legitimate mmap of the dsp buffer still works