[Bug 221151] panic: tdsendsignal(): invalid signal 0

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Aug 1 15:04:03 UTC 2017


--- Comment #2 from Nils Beyer <nbe at renzel.net> ---
(In reply to Konstantin Belousov from comment #1)

> Can you provide the minimal test case which reproduces this issue ?  It might depend on the kernel configuration.

- install FreeBSD 11.1-RELEASE (amd64) incl. ports tree
- apply patch


to ports tree

- sysctl security.bsd.map_at_zero=1
- pkg install python
- pkg install make
- cd /usr/ports/security/sandsifter
- make
- cd work/sandsifter-dff63246fed84d90118441b8ba5b5d3bdd094427
- edit "siftper.py" - shebang line to "#!/usr/bin/env python"
- ./sifter.py --unk --dis --len --sync --tick --save -- -P1 -t -j8

it will eventually crash.

> With the core dump you get, load it into kgdb and print out the trap frame by doing
>  frame 7
>  p/x *frame

root at capetown:/var/crash/#kgdb -c vmcore.0
GNU gdb 6.1.1 [FreeBSD]
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welcome to change it and/or distribute copies of it under certain conditions.
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This GDB was configured as "amd64-marcel-freebsd"...

Unread portion of the kernel message buffer:
panic: tdsendsignal(): invalid signal 0
cpuid = 3
KDB: stack backtrace:
#0 0xffffffff80aada97 at kdb_backtrace+0x67
#1 0xffffffff80a6bb76 at vpanic+0x186
#2 0xffffffff80a6b9e3 at panic+0x43
#3 0xffffffff80a71bbd at tdsendsignal+0xcbd
#4 0xffffffff80a70be4 at trapsignal+0x184
#5 0xffffffff80edf3cd at trap+0x58d
#6 0xffffffff80ec3671 at calltrap+0x8
Uptime: 5h3m50s
Dumping 903 out of 16282 MB:..2%..11%..22%..31%..41%..52%..61%..71%..82%..91%

Reading symbols from /usr/lib/debug/boot/kernel/zfs.ko.debug...done.
Loaded symbols for /usr/lib/debug/boot/kernel/zfs.ko.debug
Reading symbols from /usr/lib/debug/boot/kernel/opensolaris.ko.debug...done.
Loaded symbols for /usr/lib/debug/boot/kernel/opensolaris.ko.debug
Reading symbols from /usr/lib/debug/boot/kernel/uhid.ko.debug...done.
Loaded symbols for /usr/lib/debug/boot/kernel/uhid.ko.debug
Reading symbols from /usr/lib/debug/boot/kernel/pflog.ko.debug...done.
Loaded symbols for /usr/lib/debug/boot/kernel/pflog.ko.debug
Reading symbols from /usr/lib/debug/boot/kernel/pf.ko.debug...done.
Loaded symbols for /usr/lib/debug/boot/kernel/pf.ko.debug
#0  doadump (textdump=<value optimized out>) at pcpu.h:222
222     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) bt
#0  doadump (textdump=<value optimized out>) at pcpu.h:222
#1  0xffffffff80a6b6f1 in kern_reboot (howto=260) at
#2  0xffffffff80a6bbb0 in vpanic (fmt=<value optimized out>, ap=<value
optimized out>) at /usr/src/sys/kern/kern_shutdown.c:759
#3  0xffffffff80a6b9e3 in panic (fmt=<value optimized out>) at
#4  0xffffffff80a71bbd in tdsendsignal (p=<value optimized out>, td=<value
optimized out>, sig=<value optimized out>, ksi=<value optimized out>)
    at /usr/src/sys/kern/kern_sig.c:2137
#5  0xffffffff80a70be4 in trapsignal (td=<value optimized out>, ksi=<value
optimized out>) at /usr/src/sys/kern/kern_sig.c:2021
#6  0xffffffff80edf3cd in trap (frame=0xfffffe0466890ac0) at
#7  0xffffffff80ec3671 in calltrap () at
#8  0x000000080121e000 in ?? ()
Previous frame inner to this frame (corrupt stack?)
Current language:  auto; currently minimal
(kgdb) frame 6
#6  0xffffffff80edf3cd in trap (frame=0xfffffe0466890ac0) at
578             trapsignal(td, &ksi);
(kgdb) p/x *frame
$1 = {tf_rdi = 0x0, tf_rsi = 0x0, tf_rdx = 0x0, tf_rcx = 0x0, tf_r8 = 0x0,
tf_r9 = 0x0, tf_rax = 0x0, tf_rbx = 0x0, tf_rbp = 0x0, tf_r10 = 0x0, tf_r11 =
0x0, tf_r12 = 0x0, 
  tf_r13 = 0x0, tf_r14 = 0x0, tf_r15 = 0x0, tf_trapno = 0x20, tf_fs = 0x13,
tf_gs = 0x1b, tf_addr = 0x0, tf_flags = 0x1, tf_es = 0x3b, tf_ds = 0x3b, tf_err
= 0x0, 
  tf_rip = 0x80121e000, tf_cs = 0x43, tf_rflags = 0x302, tf_rsp = 0x866800,
tf_ss = 0x3b}

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