[Bug 240609] [iflib] [panic] with INVARIANTS: sleeping in an epoch section (12.1-pre-QA) (vlan + lagg involved)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240609

            Bug ID: 240609
           Summary: [iflib] [panic] with INVARIANTS: sleeping in an epoch
                    section (12.1-pre-QA) (vlan + lagg involved)
           Product: Base System
           Version: 12.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: bugzilla.freebsd at omnilan.de

Hello,

here's a iflib related panic I get on my real-world cold-standby setup with
12.1-prerelease and debug kernel.
It happens when creating a vlan(4) child with if_igb(4) pair as lagg(4) parent:

<6>vlan0: link state changed to UP
panic: sleeping in an epoch section
cpuid = 1
time = 1568620268
KDB: stack backtrace:                                                           
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe000058b380  
vpanic() at vpanic+0x19d/frame 0xfffffe000058b3d0
panic() at panic+0x43/frame 0xfffffe000058b430
_sleep() at _sleep+0x466/frame 0xfffffe000058b4d0
pause_sbt() at pause_sbt+0x10f/frame 0xfffffe000058b510
e1000_reset_hw_82580() at e1000_reset_hw_82580+0x1cc/frame 0xfffffe000058b550
em_if_stop() at em_if_stop+0x1b/frame 0xfffffe000058b570
iflib_stop() at iflib_stop+0xc3/frame 0xfffffe000058b5c0
iflib_vlan_register() at iflib_vlan_register+0xad/frame 0xfffffe000058b600
lagg_register_vlan() at lagg_register_vlan+0xda/frame 0xfffffe000058b660
vlan_config() at vlan_config+0x50b/frame 0xfffffe000058b6c0
vlan_clone_create() at vlan_clone_create+0x29b/frame 0xfffffe000058b730
if_clone_createif() at if_clone_createif+0x4a/frame 0xfffffe000058b780
ifioctl() at ifioctl+0x6fe/frame 0xfffffe000058b850
kern_ioctl() at kern_ioctl+0x2b0/frame 0xfffffe000058b8b0
sys_ioctl() at sys_ioctl+0x15d/frame 0xfffffe000058b980
amd64_syscall() at amd64_syscall+0x276/frame 0xfffffe000058bab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe000058bab0
--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80047439a, rsp =
0x7fffffffe348, rbp = 0x7fffffffe350 ---
KDB: enter: panic

#9  0xffffffff805cf4ca in vpanic (fmt=<value optimized out>, ap=<value
optimized out>)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/kern/kern_shutdown.c:866
#10 0xffffffff805cf273 in panic (fmt=<value optimized out>)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/kern/kern_shutdown.c:804
#11 0xffffffff805da0b6 in _sleep (ident=0xffffffff80ef0941, lock=0x0,
priority=0, wmesg=<value optimized out>, sbt=42949672, 
    pr=0, flags=256) at
/usr/local/share/deploy-tools/RELENG_12/src/sys/kern/kern_synch.c:150
#12 0xffffffff805da4af in pause_sbt (wmesg=<value optimized out>, sbt=42949672,
pr=<value optimized out>, 
    flags=<value optimized out>) at
/usr/local/share/deploy-tools/RELENG_12/src/sys/kern/kern_synch.c:332
#13 0xffffffff81b3e7cc in e1000_reset_hw_82580 (hw=0xfffffe004b7eb008) at
RELENG_12/src/sys/dev/e1000/e1000_osdep.h:97
#14 0xffffffff81b0c86b in em_if_stop (ctx=<value optimized out>)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/dev/e1000/if_em.c:1867
#15 0xffffffff806f74f3 in iflib_stop (ctx=0xfffff8000291f800) at ifdi_if.h:268
#16 0xffffffff80704e3d in iflib_vlan_register (arg=0xfffff8000291f800,
ifp=0xfffff8000295a800, vtag=232)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/net/iflib.c:3883
#17 0xffffffff806eb94a in lagg_register_vlan (arg=<value optimized out>,
ifp=<value optimized out>, vtag=<value optimized out>)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/net/if_lagg.c:452
#18 0xffffffff806f68fb in vlan_config (ifv=0xfffff80002555c00,
p=0xfffff80002895000, vid=<value optimized out>)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/net/if_vlan.c:1431
#19 0xffffffff806f596b in vlan_clone_create (ifc=0xfffff800024dec00,
name=0xfffffe000058b8d0 "vlan0", len=18446735277655190528, 
    params=<value optimized out>) at
/usr/local/share/deploy-tools/RELENG_12/src/sys/net/if_vlan.c:1066
#20 0xffffffff806e1c3a in if_clone_createif (ifc=0xfffff800024dec00,
name=0xfffffe000058b8d0 "vlan0", len=16, 
    params=0x22db40 <Address 0x22db40 out of bounds>) at
/usr/local/share/deploy-tools/RELENG_12/src/sys/net/if_clone.c:229
#21 0xffffffff806d90be in ifioctl (so=<value optimized out>, cmd=3223349628,
data=0xfffffe000058b8d0 "vlan0", 
    td=0xfffff800037a55e0) at
/usr/local/share/deploy-tools/RELENG_12/src/sys/net/if.c:3097
---Type <return> to continue, or q <return> to quit---
#22 0xffffffff8063d870 in kern_ioctl (td=0xfffff800037a55e0, fd=<value
optimized out>, com=3223349628, 
    data=<value optimized out>) at RELENG_12/src/sys/sys/file.h:337
#23 0xffffffff8063d54d in sys_ioctl (td=0xfffff800037a55e0,
uap=0xfffff800037a59a0)
    at /usr/local/share/deploy-tools/RELENG_12/src/sys/kern/sys_generic.c:712
#24 0xffffffff8093abe6 in amd64_syscall (td=0xfffff800037a55e0, traced=0)
    at RELENG_12/src/sys/amd64/amd64/../../kern/subr_syscall.c:135
#25 0xffffffff80912550 in fast_syscall_common () at
/usr/local/share/deploy-tools/RELENG_12/src/sys/amd64/amd64/exception.S:581
#26 0x000000080047439a in ?? ()
Previous frame inner to this frame (corrupt stack?)

It's almost identical to
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232362
Only this line/function istn't listed with the new hardware (then Kawela, 82576
–> now StonyLake, i350:
#13 0xffffffff80569511 in e1000_disable_pcie_master_generic
(hw=0xfffffe0000790008)

I'll mark the old one as duplicate.

Thanks,
-harry

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