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| author | Konstantin Belousov <kib@FreeBSD.org> | 2017-02-28 22:54:52 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2017-02-28 22:54:52 +0000 |
| commit | 2e6e48fb59e76a93852063e6c427d735ef4aa9ba (patch) | |
| tree | b3866ff025fd7359d4ddb4c9dfb08a21c6632800 | |
| parent | 3fc79998ea7d08699311131c3dd3365ff400c886 (diff) | |
| download | src-2e6e48fb59e76a93852063e6c427d735ef4aa9ba.tar.gz src-2e6e48fb59e76a93852063e6c427d735ef4aa9ba.zip | |
Initialize pcb_save for thread0.
Otherwise kernel traps on NULL dereference if fpu_kern(9) is used from the
thread0 context.
Reported by: cem
Reviewed by: cem, jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Notes
Notes:
svn path=/head/; revision=314429
| -rw-r--r-- | sys/amd64/amd64/machdep.c | 1 | ||||
| -rw-r--r-- | sys/i386/i386/machdep.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 682307f5fe42..207502fafd3d 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1734,6 +1734,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree) * area. */ thread0.td_pcb = get_pcb_td(&thread0); + thread0.td_pcb->pcb_save = get_pcb_user_save_td(&thread0); bzero(get_pcb_user_save_td(&thread0), cpu_max_ext_state_size); if (use_xsave) { xhdr = (struct xstate_hdr *)(get_pcb_user_save_td(&thread0) + diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c index 823a278bb2e4..2911d6604c32 100644 --- a/sys/i386/i386/machdep.c +++ b/sys/i386/i386/machdep.c @@ -2420,6 +2420,7 @@ init386(int first) * area. */ thread0.td_pcb = get_pcb_td(&thread0); + thread0.td_pcb->pcb_save = get_pcb_user_save_td(&thread0); bzero(get_pcb_user_save_td(&thread0), cpu_max_ext_state_size); if (use_xsave) { xhdr = (struct xstate_hdr *)(get_pcb_user_save_td(&thread0) + |