[Bug 192272] Running many nmap processes in parallel results in panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192272

Ed Maste <emaste at freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |emaste at freebsd.org

--- Comment #1 from Ed Maste <emaste at freebsd.org> ---
from attached core.txt:

panic: sleeping thread

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Unread portion of the kernel message buffer:
Sleeping thread (tid 100368, pid 853) owns a non-sleepable lock
KDB: stack backtrace of thread 100368:
#0 0xffffffff808fb5e9 at mi_switch+0x179
#1 0xffffffff809379e2 at sleepq_switch+0x152
#2 0xffffffff80937843 at sleepq_wait+0x43
#3 0xffffffff808faef6 at _sleep+0x366
#4 0xffffffff809b2634 at filt_bpfread+0xe4
#5 0xffffffff808b882a at knote+0xca
#6 0xffffffff809af220 at catchpacket+0x750
#7 0xffffffff809af4e7 at bpf_mtap+0x1e7
#8 0xffffffff80480349 at bce_start_locked+0x769
#9 0xffffffff8047dc5f at bce_start+0x2f
#10 0xffffffff809bb22a at if_transmit+0x10a
#11 0xffffffff809bd005 at ether_output+0x5a5
#12 0xffffffff80a2d7fe at ip_output+0x107e
#13 0xffffffff80a2f090 at rip_output+0x300
#14 0xffffffff8096e8d5 at sosend_generic+0x405
#15 0xffffffff80974cdb at kern_sendit+0x20b
#16 0xffffffff80974fd9 at sendit+0x129
#17 0xffffffff80974e9d at sys_sendto+0x4d
panic: sleeping thread
cpuid = 2
KDB: stack backtrace:
#0 0xffffffff8092b0c0 at kdb_backtrace+0x60
#1 0xffffffff808f2546 at vpanic+0x126
#2 0xffffffff808f25d3 at panic+0x43
#3 0xffffffff8093d5bd at propagate_priority+0x2fd
#4 0xffffffff8093dead at turnstile_wait+0x36d
#5 0xffffffff808ddef6 at __mtx_lock_sleep+0x2b6
#6 0xffffffff808ddb92 at __mtx_lock_flags+0x102
#7 0xffffffff8047dc57 at bce_start+0x27
#8 0xffffffff809bb22a at if_transmit+0x10a
#9 0xffffffff809bd005 at ether_output+0x5a5
#10 0xffffffff80a2d7fe at ip_output+0x107e
#11 0xffffffff80a2f090 at rip_output+0x300
#12 0xffffffff8096e8d5 at sosend_generic+0x405
#13 0xffffffff80974cdb at kern_sendit+0x20b
#14 0xffffffff80974fd9 at sendit+0x129
#15 0xffffffff80974e9d at sys_sendto+0x4d
#16 0xffffffff80cf4e18 at amd64_syscall+0x278
#17 0xffffffff80cd8f2b at Xfast_syscall+0xfb

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