Date: Tue, 27 Aug 2019 11:22:03 -0600 From: Alan Somers <asomers@freebsd.org> To: Peter Holm <pho@freebsd.org> Cc: John Baldwin <jhb@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r351522 - in head: sbin/ifconfig share/man/man4 sys/conf sys/kern sys/modules sys/modules/ktls_ocf sys/net sys/netinet sys/netinet/tcp_stacks sys/netinet6 sys/opencrypto sys/sys tools/t... Message-ID: <CAOtMX2i71h8VUK%2BKHv4X8zhAUJCq0z9VPyJxNhv%2ByREQX%2B6=qg@mail.gmail.com> In-Reply-To: <20190827170527.GA7111@x8.osted.lan> References: <201908270001.x7R01vUB052426@repo.freebsd.org> <20190827143953.GA5092@x8.osted.lan> <6f06637f-6486-bd2c-eebe-f14924e11e38@FreeBSD.org> <20190827170527.GA7111@x8.osted.lan>
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On Tue, Aug 27, 2019 at 11:05 AM Peter Holm <pho@freebsd.org> wrote: > On Tue, Aug 27, 2019 at 09:02:31AM -0700, John Baldwin wrote: > > On 8/27/19 7:39 AM, Peter Holm wrote: > > > On Tue, Aug 27, 2019 at 12:01:57AM +0000, John Baldwin wrote: > > >> Author: jhb > > >> Date: Tue Aug 27 00:01:56 2019 > > >> New Revision: 351522 > > >> URL: https://svnweb.freebsd.org/changeset/base/351522 > > >> > > >> Log: > > >> Add kernel-side support for in-kernel TLS. > > >> > > > > > > Could this be yours? > > > > > > 20190827 15:55:34 all (496/668): sendfile12.sh > > > Aug 27 15:56:16 mercat1 kernel: pid 50036 (swap), jid 0, uid 0, was > killed: out of swap space > > > panic: non-ext_pgs mbuf with TLS session > > > > Possibly, though if sfio was freed and marked with 0xdeadc0de junk, then > it > > would trip over this assertion for any use-after-free. I see in gdb > that you > > couldn't see sfio because of clang's poor debug info. It would be > really good > > to try to find the contents of sfio to debug this further. > > > > You should be able to find it via 'bp->b_caller1' in frame 14: > > > > 'p *(struct sf_io *)bp->b_caller1' > > > > Here's a repeat where the involved files are compiled with "-O0": > https://people.freebsd.org/~pho/stress/log/jhb009.txt > > Let me know if you need the kernel + core. > > - Peter > This panic is easily reproducible by the fusefs test suite. $ cd /usr/tests/sys/fs/fusefs/ $ ./read --gtest_filter=Read.sendfile panic: non-ext_pgs mbuf with TLS session cpuid = 3 time = 1566926504 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0050bdc560 vpanic() at vpanic+0x19d/frame 0xfffffe0050bdc5b0 panic() at panic+0x43/frame 0xfffffe0050bdc610 sendfile_iodone() at sendfile_iodone+0x28e/frame 0xfffffe0050bdc660 vn_sendfile() at vn_sendfile+0x1598/frame 0xfffffe0050bdc8f0 sendfile() at sendfile+0x127/frame 0xfffffe0050bdc980 amd64_syscall() at amd64_syscall+0x2b9/frame 0xfffffe0050bdcab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0050bdcab0 --- syscall (393, FreeBSD ELF64, sys_sendfile), rip = 0x80052d9ea, rsp = 0x7fffffffe5a8, rbp = 0x7fffffffe790 --- -Alan
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