Date: Wed, 11 Jun 2008 10:05:47 GMT From: kevin <kevinxlinuz@163.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/124471: lock order reversal on kldload/kldunload dtraceall Message-ID: <200806111005.m5BA5lGe070975@www.freebsd.org> Resent-Message-ID: <200806111010.m5BAA1Fq015283@freefall.freebsd.org>
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>Number: 124471 >Category: kern >Synopsis: lock order reversal on kldload/kldunload dtraceall >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jun 11 10:10:01 UTC 2008 >Closed-Date: >Last-Modified: >Originator: kevin >Release: 8.0current >Organization: 163.org >Environment: FreeBSD xxx-laptop.people.163.org 8.0-CURRENT FreeBSD 8.0-CURRENT #7: Wed Jun 11 14:49:40 CST 2008 root@xxx-laptop.people.163.org:/usr/obj/usr/src/sys/G8laptop amd64 >Description: lock order reversal: 1st 0xffffff001be3c448 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2044 2nd 0xffffffff806cd120 kernel linker (kernel linker) @ /usr/src/sys/kern/kern_linker.c:693 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a witness_checkorder() at witness_checkorder+0x5f3 _sx_xlock() at _sx_xlock+0x41 linker_file_lookup_set() at linker_file_lookup_set+0xcf linker_file_register_sysctls() at linker_file_register_sysctls+0x20 linker_load_module() at linker_load_module+0x963 linker_load_dependencies() at linker_load_dependencies+0x1b4 link_elf_load_file() at link_elf_load_file+0x9ca linker_load_module() at linker_load_module+0x919 linker_load_dependencies() at linker_load_dependencies+0x1b4 link_elf_load_file() at link_elf_load_file+0x9ca linker_load_module() at linker_load_module+0x919 kern_kldload() at kern_kldload+0x92 kldload() at kldload+0x7a syscall() at syscall+0x1dd Xfast_syscall() at Xfast_syscall+0xab --- syscall (304, FreeBSD ELF64, kldload), rip = 0x8006810cc, rsp = 0x7fffffffeaf8, rbp = 0 --- lock order reversal: 1st 0xffffffff806cd120 kernel linker (kernel linker) @ /usr/src/sys/kern/kern_linker.c:1024 2nd 0xffffffffd7d788e0 dtrace_provider_lock (dtrace_provider_lock) @ /usr/src/sys/modules/dtrace/dtrace/../../../cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c:7450 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a witness_checkorder() at witness_checkorder+0x5f3 _sx_xlock() at _sx_xlock+0x41 dtrace_unregister() at dtrace_unregister+0x3b2 profile_unload() at profile_unload+0x15 linker_file_unload() at linker_file_unload+0x366 linker_file_unload() at linker_file_unload+0x1f9 kern_kldunload() at kern_kldunload+0xcc syscall() at syscall+0x1dd Xfast_syscall() at Xfast_syscall+0xab --- syscall (444, FreeBSD ELF64, kldunloadf), rip = 0x8006803ac, rsp = 0x7fffffffe368, rbp = 0x12 --- >How-To-Repeat: kldload dtraceall after bootup, then kldunload dtraceall >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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