diff options
| author | Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com> | 2022-04-08 23:03:37 +0300 |
|---|---|---|
| committer | Andrei Vagin <avagin@gmail.com> | 2022-04-29 03:53:52 +0300 |
| commit | f81e3062ca6a4a0376b63b31749773f8f0c09949 (patch) | |
| tree | 4ec68be654f515c544e1b476269c2ccd56ece042 /images | |
| parent | bd9ee325540c5dc2db96582ef6d5cb5c0b78d065 (diff) | |
rseq: initial support
Support basic rseq C/R scenario. Assume that:
- there are no processes with IP inside the rseq critical section (CS)
- kernel has ptrace(PTRACE_GET_RSEQ_CONFIGURATION) support
On dump:
1. use ptrace(PTRACE_GET_RSEQ_CONFIGURATION) to get
struct rseq pointer, rseq size and signature from the kernel.
2. save to the image
On restore:
1. get rseq ptr, size, signature from the image
2. register it back using rseq() from the restorer parasite
Fixes: #1696
Reported-by: Radostin Stoyanov <radostin@redhat.com>
Suggested-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com>
Diffstat (limited to 'images')
| -rw-r--r-- | images/Makefile | 1 | ||||
| -rw-r--r-- | images/core.proto | 2 | ||||
| -rw-r--r-- | images/rseq.proto | 9 |
3 files changed, 12 insertions, 0 deletions
diff --git a/images/Makefile b/images/Makefile index 2eaeb7cad..004e22ec3 100644 --- a/images/Makefile +++ b/images/Makefile @@ -71,6 +71,7 @@ proto-obj-y += img-streamer.o proto-obj-y += bpfmap-file.o proto-obj-y += bpfmap-data.o proto-obj-y += apparmor.o +proto-obj-y += rseq.o CFLAGS += -iquote $(obj)/ diff --git a/images/core.proto b/images/core.proto index b713119f2..35079f366 100644 --- a/images/core.proto +++ b/images/core.proto @@ -14,6 +14,7 @@ import "timer.proto"; import "creds.proto"; import "sa.proto"; import "siginfo.proto"; +import "rseq.proto"; import "opts.proto"; @@ -101,6 +102,7 @@ message thread_core_entry { optional string comm = 13; optional uint64 blk_sigset_extended = 14; + optional rseq_entry rseq_entry = 15; } message task_rlimits_entry { diff --git a/images/rseq.proto b/images/rseq.proto new file mode 100644 index 000000000..be2800468 --- /dev/null +++ b/images/rseq.proto @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: MIT + +syntax = "proto2"; + +message rseq_entry { + required uint64 rseq_abi_pointer = 1; + required uint32 rseq_abi_size = 2; + required uint32 signature = 3; +} |