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syscall: restore signal mask after setting foreground process group

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Fixes #37217

Change-Id: I0151bb77fc4c4552d1b19c31d784943b72f84b80
Reviewed-on: https://go-review.googlesource.com/c/go/+/313653
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Ian Lance Taylor 2021-04-26 17:27:58 -07:00
parent 39844971fb
commit 7d22c2181b
5 changed files with 56 additions and 9 deletions
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6
src/syscall/exec_linux.go
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@ -233,8 +233,6 @@ func forkAndExecInChild1(argv0 *byte, argv, envv []*byte, chroot, dir *byte, att
// Fork succeeded, now in child.
runtime_AfterForkInChild()
// Enable the "keep capabilities" flag to set ambient capabilities later.
if len(sys.AmbientCaps) > 0 {
_, _, err1 = RawSyscall6(SYS_PRCTL, PR_SET_KEEPCAPS, 1, 0, 0, 0, 0)
@ -294,6 +292,10 @@ func forkAndExecInChild1(argv0 *byte, argv, envv []*byte, chroot, dir *byte, att
}
}
// Restore the signal mask. We do this after TIOCSPGRP to avoid
// having the kernel send a SIGTTOU signal to the process group.
runtime_AfterForkInChild()
// Unshare
if sys.Unshareflags != 0 {
_, _, err1 = RawSyscall(SYS_UNSHARE, sys.Unshareflags, 0, 0)