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sys_linux: allow statx and fstatat64 in seccomp filter

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With glibc 2.33 on armhf statx and fstatat64 are triggered.
Allow this call to un-break chrony on such platforms.

Without this e.g. test 005-scfilter fails and with ltrace -rTS reports:
a)
  0.001684 SYS_397(11, 0xf75def08, 6144, 2047 <no return ...>
  0.759239 +++ killed by SIGSYS +++
b)
  0.003749 SYS_327(-100, 0xffdbcc3c, 0xffdbcb50, 0)
  0.000821 --- SIGSYS (Bad system call) ---

Current armhf syscalls from:
https://github.com/torvalds/linux/blob/v5.10/arch/arm/tools/syscall.tbl

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt
2021-02-12 10:19:55 +01:00
committed by Miroslav Lichvar
parent 26ce610155
commit ae2e0318d1
1 changed files with 2 additions and 0 deletions
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2
sys_linux.c
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@@ -537,6 +537,7 @@ SYS_Linux_EnableSystemCallFilter(int level, SYS_ProcessContext context)
SCMP_SYS(fchownat),
SCMP_SYS(fstat),
SCMP_SYS(fstat64),
SCMP_SYS(fstatat64),
SCMP_SYS(getdents),
SCMP_SYS(getdents64),
SCMP_SYS(lseek),
@@ -554,6 +555,7 @@ SYS_Linux_EnableSystemCallFilter(int level, SYS_ProcessContext context)
SCMP_SYS(stat64),
SCMP_SYS(statfs),
SCMP_SYS(statfs64),
SCMP_SYS(statx),
SCMP_SYS(unlink),
SCMP_SYS(unlinkat),