On Wed, Dec 23, 2020 at 07:03:20AM +0000, Al Viro wrote: Argh.... Wrong commit blamed - the parent of the correct one. It's actually 2aa362c49c31 ("coredump: extend core dump note section to contain file names of mapped files"). My apologies - fat-fingered cut'n'paste... siginfo commit does suffer the same problem, but it becomes an issue only for 32bit processes under mips64 big-endian kernel (there it yields e.g. zero .__sigfault.si_addr in $_siginfo when using gdb with a coredump of 32bit process, whatever the actual faulting address had been). And b-e mips64 is rather uncommon, so that's less of an issue.