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Hi,
>
>I updated from r347365 to r349853. Now I get a panic on epair destroy
>(one end needs to be in a jail, and inside the jail an IP address
>needs to be assigned to the epair. If no ifconfig is used inside the
>jail, there is no panic.
>
>Another user reported something similar (but for him it was enough to
>list the interfaces inside the jail with ifconfig) in PR 234985:
>     https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234985
>
>Backtrace (here I also renamed the interface before attaching it to
>the jail, as I detected the issue with interfaces which are renamed):
>Fatal trap 9: general protection fault while in kernel mode
>cpuid = 13; apic id = 33
>instruction pointer     = 0x20:0xffffffff805f2045
>stack pointer           = 0x28:0xfffffe0159822880
>frame pointer           = 0x28:0xfffffe0159822880
>code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
>processor eflags        = interrupt enabled, resume, IOPL = 0
>current process         = 43334 (ifconfig)
>trap number             = 9
>panic: general protection fault
>cpuid = 13
>time = 1562695289
>KDB: stack backtrace:
>db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0159822590
>vpanic() at vpanic+0x19d/frame 0xfffffe01598225e0
>panic() at panic+0x43/frame 0xfffffe0159822640
>trap_fatal() at trap_fatal+0x39c/frame 0xfffffe01598226a0
>trap() at trap+0x6c/frame 0xfffffe01598227b0
>calltrap() at calltrap+0x8/frame 0xfffffe01598227b0
>--- trap 0x9, rip = 0xffffffff805f2045, rsp = 0xfffffe0159822880, rbp
>= 0xfffffe0159822880 ---
>strncmp() at strncmp+0x15/frame 0xfffffe0159822880
>ifunit_ref() at ifunit_ref+0x51/frame 0xfffffe01598228c0
>ifioctl() at ifioctl+0x508/frame 0xfffffe0159822990
>kern_ioctl() at kern_ioctl+0x26d/frame 0xfffffe0159822a00
>sys_ioctl() at sys_ioctl+0x15d/frame 0xfffffe0159822ad0
>amd64_syscall() at amd64_syscall+0x23a/frame 0xfffffe0159822bf0
>fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0159822bf0
>--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8004690da, rsp =
>0x7fffffffe448, rbp = 0x7fffffffe4b0 ---
>Uptime: 3h34m59s
>Dumping 5294 out of 61352 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
>
>__curthread () at /space/system/usr_src/sys/amd64/include/pcpu.h:246
>246             __asm("movq %%gs:%P1,%0" : "=r" (td) : "n"
>(OFFSETOF_CURTHREAD));
>(kgdb) #0  __curthread () at
>/space/system/usr_src/sys/amd64/include/pcpu.h:246
>#1  doadump (textdump=1) at /space/system/usr_src/sys/kern/kern_shutdown.c:392
>#2  0xffffffff8050cf70 in kern_reboot (howto=260)
>     at /space/system/usr_src/sys/kern/kern_shutdown.c:479
>#3  0xffffffff8050d3e9 in vpanic (fmt=<optimized out>, ap=<optimized out>)
>     at /space/system/usr_src/sys/kern/kern_shutdown.c:905
>#4  0xffffffff8050d123 in panic (fmt=<unavailable>)
>     at /space/system/usr_src/sys/kern/kern_shutdown.c:832
>#5  0xffffffff807e758c in trap_fatal (frame=0xfffffe01598227c0, eva=0)
>     at /space/system/usr_src/sys/amd64/amd64/trap.c:943
>#6  0xffffffff807e698c in trap (frame=0xfffffe01598227c0)
>     at /space/system/usr_src/sys/amd64/amd64/trap.c:221
>#7  <signal handler called>
>#8  0xffffffff805f2045 in strncmp (s1=<optimized out>, s2=<optimized out>,
>     n=<optimized out>) at /space/system/usr_src/sys/libkern/strncmp.c:44
>#9  0xffffffff80605d31 in ifunit_ref (name=0xfffffe0159822a20 "panic_test1b")
>     at /space/system/usr_src/sys/net/if.c:2434
>#10 0xffffffff80607ef8 in ifioctl (so=0xfffff809a1afd368, cmd=3223349536,
>     data=0xfffffe0159822a20 "panic_test1b", td=0xfffff8014c83e5a0)
>     at /space/system/usr_src/sys/net/if.c:3093
>#11 0xffffffff8057658d in fo_ioctl (fp=<optimized out>, com=3223349536,
>     data=0xfffff800020e2180, active_cred=0x0, td=0xfffff8014c83e5a0)
>     at /space/system/usr_src/sys/sys/file.h:333
>#12 kern_ioctl (td=0xfffff8014c83e5a0, fd=3, com=3223349536,
>     data=0xfffff800020e2180 "")
>     at /space/system/usr_src/sys/kern/sys_generic.c:800
>#13 0xffffffff805762ad in sys_ioctl (td=0xfffff8014c83e5a0,
>     uap=0xfffff8014c83e968) at
>/space/system/usr_src/sys/kern/sys_generic.c:712
>#14 0xffffffff807e801a in syscallenter (td=0xfffff8014c83e5a0)
>     at /space/system/usr_src/sys/amd64/amd64/../../kern/subr_syscall.c:135
>#15 amd64_syscall (td=0xfffff8014c83e5a0, traced=0)
>     at /space/system/usr_src/sys/amd64/amd64/trap.c:1181
>#16 <signal handler called>
>#17 0x00000008004690da in ?? ()
>Backtrace stopped: Cannot access memory at address 0x7fffffffe448
>
>Bye,
>Alexander.
>
>--
>http://www.Leidinger.net alexan...@leidinger.net: PGP 0x8F31830F9F2772BF
>http://www.FreeBSD.org    netch...@freebsd.org  : PGP 0x8F31830F9F2772BF
>
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