Date: Fri, 20 Mar 2015 11:34:51 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Mateusz Guzik <mjguzik@gmail.com>, jenkins-admin@freebsd.org, freebsd-current@freebsd.org Subject: Re: Build failed in Jenkins: FreeBSD_HEAD-tests2 #854 Message-ID: <20150320093451.GN2379@kib.kiev.ua> In-Reply-To: <20150320022026.GA10296@dft-labs.eu> References: <615255742.14.1426582002157.JavaMail.jenkins@jenkins-9.freebsd.org> <812621580.0.1426817304110.JavaMail.jenkins@jenkins-9.freebsd.org> <20150320022026.GA10296@dft-labs.eu>
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On Fri, Mar 20, 2015 at 03:20:26AM +0100, Mateusz Guzik wrote: > On Fri, Mar 20, 2015 at 02:08:23AM +0000, jenkins-admin@freebsd.org wrote: > > lib/libc/sys/setrlimit_test:setrlimit_nproc -> maxproc limit exceeded by uid 977 (pid 29170); see tuning(7) and login.conf(5) > > passed [0.551s] > > lib/libc/sys/setrlimit_test:setrlimit_perm -> panic: mutex process lock not owned at /builds/FreeBSD_HEAD/sys/kern/kern_prot.c:1974 > > cpuid = 1 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe009749a8e0 > > vpanic() at vpanic+0x189/frame 0xfffffe009749a960 > > panic() at panic+0x43/frame 0xfffffe009749a9c0 > > __mtx_assert() at __mtx_assert+0xc2/frame 0xfffffe009749a9d0 > > proc_set_cred() at proc_set_cred+0x36/frame 0xfffffe009749a9f0 > > fork1() at fork1+0x27e/frame 0xfffffe009749aac0 > > sys_fork() at sys_fork+0x1f/frame 0xfffffe009749aae0 > > amd64_syscall() at amd64_syscall+0x27f/frame 0xfffffe009749abf0 > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe009749abf0 > > --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8019c216a, rsp = 0x7fffffffc2d8, rbp = 0x7fffffffc340 --- > > KDB: enter: panic > > [ thread pid 660 tid 100065 ] > > Stopped at kdb_enter+0x3e: movq $0,kdb_why > > Weird, I'll look at that. This is due to p_ucred not initialized on allocation of struc proc. The member is not in p_startzero/p_endzero region, so it contains garbage at the stage of the fork where proc_set_cred() is called, while the function makes assertion based on the p_ucred content.
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