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| author | Warner Losh <imp@FreeBSD.org> | 2022-06-29 22:31:23 +0000 |
|---|---|---|
| committer | Warner Losh <imp@FreeBSD.org> | 2022-07-15 18:00:51 +0000 |
| commit | 2870493f1f55d5c00e5593f336dc05805863db7f (patch) | |
| tree | 564139dc81091a74884c13d4083c667a21b6cf87 | |
| parent | ffb0d016df7e5526e4b8fd74a1f0617c81478328 (diff) | |
| download | src-2870493f1f55d5c00e5593f336dc05805863db7f.tar.gz src-2870493f1f55d5c00e5593f336dc05805863db7f.zip | |
kboot: Properly cap number of segments loaded for kexec
Linux has an arbitrary limit of 16 segments. Make sure we don't load too
many.
Sponsored by: Netflix
| -rw-r--r-- | stand/kboot/main.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/stand/kboot/main.c b/stand/kboot/main.c index 79c03398ba6d..83ad0ceb8a18 100644 --- a/stand/kboot/main.c +++ b/stand/kboot/main.c @@ -340,15 +340,17 @@ time(time_t *tloc) return (rv); } -struct host_kexec_segment loaded_segments[128]; +struct host_kexec_segment loaded_segments[HOST_KEXEC_SEGMENT_MAX]; int nkexec_segments = 0; static ssize_t get_phys_buffer(vm_offset_t dest, const size_t len, void **buf) { int i = 0; - const size_t segsize = 4*1024*1024; + const size_t segsize = 8*1024*1024; + if (nkexec_segments == HOST_KEXEC_SEGMENT_MAX) + panic("Tried to load too many kexec segments"); for (i = 0; i < nkexec_segments; i++) { if (dest >= (vm_offset_t)loaded_segments[i].mem && dest < (vm_offset_t)loaded_segments[i].mem + |