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Differential D23599

Add missing EPOCH(9) wrapper in ipfw
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Authored by • hselasky on Feb 10 2020, 9:13 AM.
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imp
melifaro
rscheff

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Reviewers
glebius
ae
jmd
jeff
mmacy
Commits
rS357769: Add missing EPOCH(9) wrapper in ipfw(8).
Summary

Backtrace:
panic()
ip_output()
dyn_tick()
softclock_call_cc()
softclock()
ithread_loop()

Found by: mmacy@
Reported by: jmd@
Sponsored by: Mellanox Technologies

Diff Detail

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rS FreeBSD src repository - subversion
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Build Status
Buildable 29264

Event Timeline

• hselasky created this revision.Feb 10 2020, 9:13 AM
Herald added a subscriber: imp. · View Herald TranscriptFeb 10 2020, 9:13 AM
Harbormaster completed remote builds in B29264: Diff 68051.Feb 10 2020, 9:13 AM
• hselasky edited the summary of this revision. (Show Details)Feb 10 2020, 9:14 AM
• hselasky added a reviewer: mmacy.
ae accepted this revision.Feb 10 2020, 10:26 AM
This revision is now accepted and ready to land.Feb 10 2020, 10:26 AM
glebius added a comment.Feb 10 2020, 6:15 PM

Thanks for the find. I'd rather move the entrance to dyn_tick(). Would use less lines of code and would make it easier to spot it later, when we have callouts supporting epoch.

• hselasky updated this revision to Diff 68095.Feb 10 2020, 8:51 PM
• hselasky retitled this revision from Add missing EPOCH wrappers in firewall code to Add missing EPOCH(9) wrapper in ipfw.
This revision now requires review to proceed.Feb 10 2020, 8:51 PM
Harbormaster completed remote builds in B29281: Diff 68095.Feb 10 2020, 8:51 PM
• hselasky added a comment.Feb 10 2020, 8:52 PM

@glebius: Looks better now?

glebius accepted this revision.Feb 11 2020, 6:09 PM
This revision is now accepted and ready to land.Feb 11 2020, 6:09 PM
Closed by commit rS357769: Add missing EPOCH(9) wrapper in ipfw(8). (authored by • hselasky). · Explain WhyFeb 11 2020, 6:16 PM
This revision was automatically updated to reflect the committed changes.
• hselasky added a commit: rS357769: Add missing EPOCH(9) wrapper in ipfw(8)..
rscheff added a subscriber: rscheff.Feb 18 2020, 3:48 PM

IPFW/Dummynet appears to now panic with EPOCH assertions (netpfil/ip_dn_*)

Herald added a subscriber: melifaro. · View Herald TranscriptFeb 18 2020, 3:48 PM
• hselasky added a comment.Feb 18 2020, 3:50 PM
In D23599#521566, @rscheff_gmx.at wrote:

IPFW/Dummynet appears to now panic with EPOCH assertions (netpfil/ip_dn_*)

Do you have a backtrace?

--HPS

rscheff added a comment.Feb 18 2020, 3:52 PM

panic: Assertion in_epoch(net_epoch_preempt) failed at /root/freebsd-master/freebsd/sys/netpfil/ipfw/ip_dn_io.c:745
cpuid = 0
time = 1582039197
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00084ff890
vpanic() at vpanic+0x185/frame 0xfffffe00084ff8f0
panic() at panic+0x43/frame 0xfffffe00084ff950
dummynet_send() at dummynet_send+0x43/frame 0xfffffe00084ff990
dummynet_task() at dummynet_task+0x31e/frame 0xfffffe00084ffa00
taskqueue_run_locked() at taskqueue_run_locked+0xaa/frame 0xfffffe00084ffa80
taskqueue_thread_loop() at taskqueue_thread_loop+0xc2/frame 0xfffffe00084ffab0
fork_exit() at fork_exit+0x80/frame 0xfffffe00084ffaf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00084ffaf0

  • trap 0, rip = 0, rsp = 0, rbp = 0 ---

KDB: enter: panic
Uptime: 7m36s

• hselasky added a comment.Feb 18 2020, 4:03 PM

Try this:

https://reviews.freebsd.org/D23742

Revision Contents
Changeset List

PathSize
sys/
netpfil/
ipfw/
6 lines

Diff 68051

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sys/netpfil/ipfw/ip_fw_dynamic.c

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