NetBSD uses different uid/gid than FreeBSD/OpenBSD for the user
nobody. Instead of hardcoding the values, retrieve it from the
password entry database.
While there, switch to setuid(2) and setgid(2) calls as they are
good enough and portable. setresgid(2) and setresuid(2) aren't
available on NetBSD.
rand_addr option is the first option for the ipv6_addr union
and is just an array of 16 bytes. This option makes it easy
for trace2syz to convert ipv6 address as strace decodes
the ipv6 address as a hex string.
Initialize syz data segment with protection allowed by PaX MPROTECT.
PROT_MPROTECT() registers future potential protection that is allowed
to be enabled in future.
Builds in one distro, but another says:
In file included from <stdin>:39:0:
/usr/powerpc64le-linux-gnu/include/linux/if.h:143:8: error: redefinition of ‘struct ifmap’
/usr/powerpc64le-linux-gnu/include/net/if.h:111:8: note: originally defined here
Mess. Try to fix it.
Not sure what's the right solution and it it even exists.
ip command caused several problems:
1. It is installed in different locations or
not installed at all in different distros.
2. It does not support latest kernel devices,
e.g. setup of hsr currently fails because
our ip does not understand its custom prose.
3. ip command is slow, unbearably slow in emulator
(full setup takes tens of seconds). This change
reduces setup from ~2s to ~400ms.
4. ip is not present in gvisor, but it will support netlink.
Use netlink directly to solve all these problems.
FreeBSD sets the kcov buffer as number of bytes instead of number
of entries. This also fixes the mmap() call, which was failing
due to inconsistent sizes. The failing was hidden due to wrong
error handling.
We don't specify trailing unused args for some syscalls
(e.g. ioctl that does not use its arg).
Executor always filled tailing unsed args with 0's
but pkg/csource didn't. Some such syscalls actually
check that the unsed arg is 0 and as the result failed with C repro.
We could statically check and eliminate all such cases,
but it turns out the warning fires in 1500+ cases:
a3ace5a63f/gistfile1.txt
So instead fill such args with 0's in pkg/csource too.
This adds 2 ioctls and an argument type:
- FS_IOC_ENABLE_VERITY
- FS_IOC_MEASURE_VERITY
- struct fsverity_digest
Note fs-verity on-disk structs are not yet added.
* Revert "Revert "executor: add setuid sandbox for openbsd""
The problem is the low file descriptor limit.
This reverts commit 4093e33b13.
* executor/executor make sure the file descriptor limit is sufficient
AUTO arguments can be used for:
- consts
- lens
- pointers
For const's and len's AUTO is replaced with the natural value,
addresses for AUTO pointers are allocated linearly.
This greatly simplifies writing test programs by hand
as most of the time we want these natural values.
Update tests to use AUTO.
