Date: Tue, 19 Jul 2005 18:49:01 -0700 (PDT) From: Nick Johnson <freebsd@spatula.net> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/83761: vm-related panic: blst_radix_free: freeing free block Message-ID: <20050720014901.4ED51A94A@turing.morons.org> Resent-Message-ID: <200507200150.j6K1oLBC009430@freefall.freebsd.org>
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>Number: 83761 >Category: kern >Synopsis: vm-related panic: blst_radix_free: freeing free block >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jul 20 01:50:21 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Nick Johnson >Release: FreeBSD 4.11-STABLE i386 >Organization: morons.org >Environment: System: FreeBSD turing.morons.org 4.11-STABLE FreeBSD 4.11-STABLE #3: Sat Dec 18 16:12:51 PST 2004 root@turing.morons.org:/usr/obj/usr/src/sys/TURING i386 >Description: Not sure what happened here, but the box crashed when I exited a vim session that had been running (stopped) for a few weeks. I use vm.swap_enabled, so the entire process was likely swapped out and would have swapped in and then been freed after I exited. From the look of the stack trace, the crash occurred during process exit. Fortunately I have dumpon in use, although my kernel has no debugging symbols. Here's the pertinent information from gdb -k: IdlePTD at physical address 0x0033e000 initial pcb at physical address 0x002a7c00 panicstr: blst_radix_free: freeing free block panic messages: --- panic: blst_radix_free: freeing free block (kgdb) bt #0 0xc015c81e in dumpsys () #1 0xc015c5ef in boot () #2 0xc015ca2d in panic () #3 0xc0169f53 in blst_leaf_free () #4 0xc016a04c in blst_meta_free () #5 0xc016a06f in blst_meta_free () #6 0xc016a06f in blst_meta_free () #7 0xc016a06f in blst_meta_free () #8 0xc0169cd2 in blist_free () #9 0xc020466a in swp_pager_meta_free_all () #10 0xc0203232 in swap_pager_dealloc () #11 0xc020fc0f in vm_pager_deallocate () #12 0xc020b224 in vm_object_terminate () #13 0xc020b0c0 in vm_object_deallocate () #14 0xc0208390 in vm_map_entry_delete () #15 0xc0208549 in vm_map_delete () #16 0xc02085d6 in vm_map_remove () #17 0xc01542e4 in exit1 () #18 0xc01540b8 in exit1 () #19 0xc0236199 in syscall2 () #20 0xc0229a75 in Xint0x80_syscall () Cannot access memory at address 0xbfbfee90. >How-To-Repeat: Unknown. This is the first time I've witnessed this on this machine in 3+ years of operation. >Fix: Unknown. >Release-Note: >Audit-Trail: >Unformatted:
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