Change Details

Sizeof timeval is 16 bytes, timeval32 is 12 bytes (8 bytes on i386), but compiler adds padding to timeval32 and makes it 16 bytes long. This patch forces size of timeval32 to be 12 bytes BPF falls back to 32 bit mode when it receives 32 bit ioctl, but with equal sizeof's 64 bit and 32 bit ioctls are indistinguishable. This patch also fixes buffer overflow when using tcpdump

Sometimes 32 bit and 64 bit ioctls are represented by the same number. It causes unnecessary switch to 32 bit commpatible mode. This patch prevents switching when we are dealing with 64 bit executable. It fixes issue mentioned [[ https://lists.freebsd.org/pipermail/freebsd-arm/2018-January/017360.html | here ]]

Sizeof Sometimeval is 16 bytes, timeval32 is 12 bytes (8 bytes on i386), buts 32 bit and 64 bit ioctls are represented by the same number. compiler adds padding to timeval32 and makes it 16 bytes longIt causes unnecessary switch to 32 bit commpatible mode. This patch forces size of timeval32 to be 12 bytes BPF falls back to 32 bit mode when it receives 32prevents switching when we are dealing with 64 bit ioctl, but with equalexecutable. sizeof's 64 bit and 32 bit ioctls are indistinguishable. This patch also fixes buffer overflow when using tcpdumpIt fixes issue mentioned [[ https://lists.freebsd.org/pipermail/freebsd-arm/2018-January/017360.html | here ]]