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* net.c (print_tpacket_stats): Change decoder to match the kernel
behaviour: getsockopt syscall accepts any non-negative *optlen and
writes either MIN(sizeof(struct tpacket_stats), *optlen) or
MIN(sizeof(struct tpacket_stats_v3), *optlen) bytes of data.
* net.c: Remove checks for SO_PEERCRED, SO_ATTACH_FILTER, and
SO_ATTACH_REUSEPORT_CBPF macros as they are defined unconditionally
since commit v4.23~199.
* net.c (print_ucred): Rename to print_get_ucred, change decoder
to match the kernel behaviour: getsockopt syscall accepts any
non-negative *optlen and writes MIN(sizeof(struct ucred), *optlen)
bytes of data.
(print_getsockopt): Replace print_ucred with print_get_ucred.
* tests/so_percred.c: Include <string.h>.
(main): Update expected output.
* net.c (print_get_linger): Change decoder to match the kernel
behaviour: getsockopt syscall accepts any non-negative *optlen
and writes MIN(sizeof(struct linger), *optlen) bytes of data.
(print_set_linger): Move after definition of SYS_FUNC(getsockopt).
* tests/so_linger.c: Include <stddef.h> and <string.h>.
(main): Update expected output.
* net.c (print_getsockopt): Apply (ulen < 0 || rlen < 0) check for all
cases. As the kernel neither accepts nor returns a negative length
in case of successful getsockopt syscall invocation, these negative
values must have been forged by userspace.
Workaround additional incompatibility between <sys/stat.h> and
<asm/stat.h> introduced by glibc-2.27.9000-566-gfd70af4.
* tests/xstatx.c (statx, statx_timestamp): Redefine before the inclusion
of <sys/stat.h> to avoid conflicts between definitions provided by the
linux kernel headers and the GNU libc.
Use check_quota function for invalid commands instead of manual quotactl
syscall invocations. In this way successful injection can also be checked
for these commands in the next commit.
* tests/quotactl.c (main): Add invalid_cmd_str and invalid_id_str local
variables, remove unused variable rc, use check_quota instead of manual
quotactl syscall invocations.
* tests/quotaclt.c (main): Add invalid_cmd_str variable, remove unused
variable rc, use check_quota instead of manual quotactl syscall invocations.
* tests/quotactl.c (print_dqfmt): New function.
(main): Use print_dqfmt to print flags of quota format, improve existing
tests and add more tests for Q_GETFMT.
* tests/quotactl-xfs.c: Improve existing tests and add more tests for
Q_XGETQSTAT and Q_XGETQSTATV.
* tests/fcntl-common.c: Include <assert.h>.
(struct fcntl_cmd_check): New structure.
(print_retval_flags, test_other_set_cmd, test_other_get_cmd,
print_flags_getfd, print_flags_getsig, print_flags_getlease,
test_fcntl_others): New functions.
(main): Use test_fcntl_others.
Make -e kvm= interface available on all architectures by adding a stub
on those architectures that do not have <linux/kvm.h>.
* filter_qualify.c (qualify_kvm): Define unconditionally.
(qual_options): Define qualify_kvm entry unconditionally.
* strace.c (usage): Mention kvm argument of -e option unconditionally.
* xlat/bpf_attach_type.in (BPF_CGROUP_UDP4_SENDMSG,
BPF_CGROUP_UDP6_SENDMSG): New constant, introduced by Linux commit
v4.18-rc1~114^2~9^2~20^2~4.
(BPF_LIRC_MODE2): New constant, introduced by Linux commit
v4.18-rc1~114^2~9^2~15^2~1.
* xlat/bpf_commands.in (BPF_BTF_LOAD): New constant, introduced by Linux
commit v4.18-rc1~114^2~417^2~1^2~5.
(BPF_BTF_GET_FD_BY_ID): New constant, introduced by Linux commit
v4.18-rc1~114^2~223^2~21^2~4.
(BPF_TASK_FD_QUERY): New constant, introduced by Linux commit
v4.18-rc1~114^2~148^2~1^2~5.
* xlat/bpf_map_types.in (BPF_MAP_TYPE_XSKMAP): New constant, introduced
by Linux commit v4.18-rc1~114^2~304^2~4^2~8.
(BPF_MAP_TYPE_SOCKHASH): New constant, introduced by Linux commit
v4.18-rc1~114^2~223^2~5^2~2.
* xlat/bpf_prog_types.in (BPF_PROG_TYPE_LWT_SEG6LOCAL): New constant,
introduced by Linux commit v4.18-rc1~114^2~148^2~2^2~1.
(BPF_PROG_TYPE_LIRC_MODE2): New constant, introduced by Linux commit
v4.18-rc1~114^2~9^2~15^2~1.
* tests/bpf.c: Update expected output.
* linux/hppa/syscallent.h ([350]): Wire up io_pgetevents syscall
introduced by Linux commit v4.18-rc3~7^2~2.
* linux/microblaze/syscallent.h ([399], [400]): Wire up io_pgetevents
and rseq syscalls introduced by Linux commit v4.18-rc3~33^2~2.
* linux/mips/syscallent-n32.h ([6331], [6332]): Wire up rseq and
io_pgetevents syscalls introduced by Linux commits v4.18-rc2~11^2~2
and v4.18-rc2~11^2, respectively.
* linux/mips/syscallent-n64.h ([5327], [5328]): Likewise.
* linux/mips/syscallent-o32.h ([4367], [4368]): Likewise.
* linux/powerpc/syscallent.h ([388]): Wire up io_pgetevents syscall
introduced by Linux commit v4.18-rc3~14^2~2.
* linux/powerpc64/syscallent.h ([388]): Likewise.
* linux/s390/syscallent.h ([382], [383]): Wire up io_pgetevents
and rseq syscalls introduced by Linux commits v4.18-rc4~18^2~1
and v4.18-rc4~18^2, respectively.
* linux/s390x/syscallent.h([382], [383]): Likewise.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* maint/gen-tag-message.sh: Align the wording of the changes section
header with the one used in NEWS, add a reference to CREDITS in
"Contributors" section.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* filter_qualify.c (qualify_kvm): Call error_msg_and_die instead of
error_msg in case of invalid -e kvm= argument.
* tests/options-syntax.test: Check it.
In KVM, a virtual machine implementation like Qemu can access a vcpu
via ioctl. KVM_RUN is an ioctl command to enter vcpu. The command
returns control for various reasons: needs of device emulation or
consuming time slices are the typical ones. The vmi takes a different
action for the reason.
We, strace users, want to know the reason to understand kvm. This
change prints the reason as auxstr if "-e kvm=vcpu" option is given,
and if strace runs on Linux 4.16.0 or higher, which includes commit
e46b469278a59781f9b25ff608af84892963821b, "kvm: embed vcpu id to dentry
of vcpu anon inode."
The way to get the reason is a bit complicated because the ioctl does
not return it to the userspace directly. Instead, the vmi and kvm
communicate via an area of the process virtual memory where the fd of
vcpu is mmap'ed. strace must peek the area to know the reason.
The change does three things: (1) recording the area for the given vcpu
when the target calls VCPU_CREATE to vcpu_info_list per tcb data field,
(2) verifying the data recorded in vcpu_info_list before doing (3), and
(3) decoding the exit reason field of the area.
The change is complicated because there is a case that strace
does not have a chance to do (1) if -p option is used.
In this case, vcpu_info data created in the step (2).
The area has more fields than "exit reason",
dumping them may be implemented in the future.
* defs.h (struct tcb) [HAVE_LINUX_KVM_H]: Add vcpu_info_list field.
[HAVE_LINUX_KVM_H]: (kvm_run_structure_decoder_init,
kvm_vcpu_info_free): New declarations.
* strace.c (usage): Add "kvm" as a new expression for -e option.
(droptcb): Call kvm_vcpu_info_free.
* filter_qualify.c (qualify_kvm): New function calling
kvm_run_structure_decoder_init to enable for attaching the exit
reason to auxstr.
(qual_options): Add "kvm" as an entry.
* xlat/kvm_exit_reason.in: New file.
* kvm.c: Include xmalloc.h and mmap_cache.h.
(dump_kvm_run_structure): New static variable.
(kvm_run_structure_decoder_init): New function.
(vcpu_info): New struct definition representing the 3-tuple: vcpu file
descriptor, id of the vcpu, and mmap'ed entry.
(vcpu_find, vcpu_alloc, vcpu_register, vcpu_getinfo,
kvm_vcpu_info_free): New functions to access tcb's vcpu_info_list
field and vcpu_info data type.
(is_map_for_file, map_len): New helper functions.
(kvm_ioclt_run_attach_auxstr, kvm_ioctl_decode_run): New functions
decoding vcpu exit reason and attaching the decoded data to auxstr
field of tcb.
(kvm_ioctl_create_vcpu): Call vcpu_register to make an entry mapping
a file descriptor and the vcpu id associated with the fd.
(kvm_ioctl): Call kvm_ioctl_decode_run.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* mmap_cache.c (mmap_cache_search_custom): New function.
* mmap_cache.h (mmap_cache_search_fn): New type.
(mmap_cache_search_custom): New function prototype.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
* tests/ioctl_kvm_run.c [!HAVE_STRUCT_KVM_CPUID2]: Skip the test.
(KVM_MAX_CPUID_ENTRIES): New macro.
(print_cpuid_ioctl): New function.
(main): Add tests for cpuid related ioctl.
Signed-off-by: Pierre Marsais <pierre.marsais@lse.epita.fr>
Reduce false positives by wrapping network-related operations into a loop.
* ci/install-dependencies.sh (retry_if_failed): New function.
Use it to invoke apt-get update, apt-get install, git clone,
add-apt-repository, and pip install.
Commit v4.23~10 has broken the build with Android's libc because it
relies on the UAPI headers (such as <linux/signal.h>) to define various
types, rather than copying them into the libc headers (such as <signal.h>)
like most other Linux C libraries.
* linux/linux/signal.h: Rename to linux/signal.h.in.
* Makefile.am (strace_SOURCES): Remove linux/linux/signal.h.
(EXTRA_DIST): Add linux/signal.h.in.
(DISTCLEANFILES): Add linux/linux/signal.h.
* configure.ac (AC_CACHE_CHECK): Check whether <linux/signal.h>
can be used along with <signal.h>, install linux/linux/signal.h
workaround if they cannot be used together.
Reported-by: Elliott Hughes <enh@google.com>
Closes: https://github.com/strace/strace/issues/72
As rseq syscall is not x32-specific, move it after the previous one
that is not x32-specific. Fix the unused syscall number range.
* linux/x32/syscallent.h ([334]): Move it after [333].
([335 ... 511]): Update the range.
* xlat/aio_cmds.in: New file.
* aio.c (tprint_lio_opcode): Change array of structs "cmds" to array of
enums "subs", use printxval_indexn_ex for printing cmd, return sub type
using subs array.
* xlat/sock_tcp_options.in (TCP_ZEROCOPY_RECEIVE): New constant,
introduced by Linux commit v4.18-rc1~114^2~351^2~1.
(TCP_INQ): New constant, introduced by Linux commit v4.18-rc1~114^2~330.
