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The cycle: create jail, run test, optionally run test cleanup, remove jail.
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Nov 15, 2024
Avoid calling _callout_stop_safe with a non-sleepable lock held when
detaching by initializing callout_init_rw() with CALLOUT_SHAREDLOCK.
It avoids the following WITNESS warning when stopping the service:
# service ipfilter stop
calling _callout_stop_safe with the following non-sleepable locks held:
shared rw ipf filter load/unload mutex (ipf filter load/unload mutex) r = 0 (0xffff0000417c7530) locked @ /usr/src/sys/netpfil/ipfilter/netinet/fil.c:7926
stack backtrace:
#0 0xffff00000052d394 at witness_debugger+0x60
#1 0xffff00000052e620 at witness_warn+0x404
#2 0xffff0000004d4ffc at _callout_stop_safe+0x8c
#3 0xffff0000f7236674 at ipfdetach+0x3c
#4 0xffff0000f723fa4c at ipf_ipf_ioctl+0x788
#5 0xffff0000f72367e0 at ipfioctl+0x144
#6 0xffff00000034abd8 at devfs_ioctl+0x100
#7 0xffff0000005c66a0 at vn_ioctl+0xbc
#8 0xffff00000034b2cc at devfs_ioctl_f+0x24
#9 0xffff0000005331ec at kern_ioctl+0x2e0
#10 0xffff000000532eb4 at sys_ioctl+0x140
#11 0xffff000000880480 at do_el0_sync+0x604
#12 0xffff0000008579ac at handle_el0_sync+0x4c
PR: 282478
Suggested by: markj
Reviewed by: cy
Approved by: emaste (mentor)
MFC after: 1 week
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