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The functions like gmtime(3) expect to cache a GMT time zone. Some sandboxed programs (like last(1)) use the gmtime(3) function. In case of last(1), this function fails to load a proper time zone because it is called after entering the capability mode. _open () at _open.S:4 0x00000008011bc5a8 in tzloadbody (name=0x8018b9580 "/usr/share/zoneinfo/Etc/UTC", sp=0x801870140, tzload (name=<optimized out>, sp=0x801870140, doextend=true) 0x00000008011bb8ba in gmtload (sp=0x801870140) at /usr/src/contrib/tzcode/localtime.c:1456 gmtcheck () at /usr/src/contrib/tzcode/localtime.c:1581 0x000000080111f85a in _libc_once (once_control=0x80127c550, init_routine=0x0) _once (once_control=0x80127c550, init_routine=0x0) at /usr/src/lib/libc/gen/_once_stub.c:63 0x00000008011bb9d0 in gmtime_r (timep=0x7fffffffe3a8, tmp=0x80127c568) gmtime (timep=timep@entry=0x7fffffffe3a8) at /usr/src/contrib/tzcode/localtime.c:1865 0x0000000001024cd4 in printentry (bp=bp@entry=0x8018b4800, tt=tt@entry=0x80186a0a0) 0x00000000010245ae in doentry (bp=0x8018b4800) 0x00000000010243a7 in main (argc=1, argv=<optimized out>) This time zone is not loaded by the tzset(3) function. Because of that, extend the caph_cache_tzdata(3) function to also include the GMT time zone. There is no other way to cache this data than calling gmtime(3) once. MFC after: 5 days Reviewed by: emaste, markj Differential Revision: https://reviews.freebsd.org/D45297 |
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| capsicum_helpers.3 | ||
| capsicum_helpers.h | ||
| Makefile | ||
| Makefile.depend | ||