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Code Issues Releases Activity

arm64: Fix thread0.td_kstack_pages init

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Commit 86a994d653 initialized
thread0.td_kstack_pages to KSTACK_PAGES.  Due to the lack of an
include of opt_kstack_pages.h it used the fallback value of 4 from
machine/param.h.  This meant that increasing KSTACK_PAGES in the kernel
config resulted in a panic in _epoch_enter_preempt as the following
assertion was false during network stack setup:

        MPASS((vm_offset_t)et >= td->td_kstack &&
	    (vm_offset_t)et + sizeof(struct epoch_tracker) <=
	    td->td_kstack + td->td_kstack_pages * PAGE_SIZE);

Switch to initializing with kstack_pages following other architectures.

Reviewed by:	imp, markj
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D38048
This commit is contained in:
Brooks Davis 2023-01-17 16:35:08 +00:00
parent c968598479
commit e1b610f76c
1 changed files with 1 additions and 1 deletions
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2
sys/arm64/arm64/machdep.c
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@ -365,7 +365,7 @@ init_proc0(vm_offset_t kstack)
proc_linkup0(&proc0, &thread0);
thread0.td_kstack = kstack;
thread0.td_kstack_pages = KSTACK_PAGES;
thread0.td_kstack_pages = kstack_pages;
#if defined(PERTHREAD_SSP)
thread0.td_md.md_canary = boot_canary;
#endif