[Bug 247746] System reboots when attempting to name a network interface 'bridge'

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247746

--- Comment #6 from Tom Jones <thj at FreeBSD.org> ---
Loading pf did it.

root at freebsd-current:~ # kldload pf                                             
root at freebsd-current:~ # ifconfig bridge create                                 
bridge0                                                                         
root at freebsd-current:~ # ifconfig bridge0 name bridge                           

Fatal double fault                                                              
rip 0xffffffff80c0b9dc rsp 0xfffffe00aafcb000 rbp 0xfffffe00aafcb020            
rax 0xfffff80003ba9140 rdx 0 rbx 0xfffff80005e9c700                             
rcx 0xfffff80003ccd700 rsi 0xfffff8000378c700 rdi 0                             
r8 0x100 r9 0xffffffff8190d980 r10 0xffffffff81d390e0                           
r11 0x1 r12 0 r13 0                                                             
r14 0xfffffe00aafce810 r15 0xfffff80005e9c800 rflags 0x10246                    
cs 0x20 ss 0x28 ds 0x3b es 0x3b fs 0x13 gs 0x1b                                 
fsbase 0x800257920 gsbase 0xffffffff82213000 kgsbase 0                          
cpuid = 3; apic id = 03                                                         
panic: double fault                                                             
cpuid = 3                                                                       
time = 1593808620                                                               
KDB: stack backtrace:                                                           
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00217b5db0  
vpanic() at vpanic+0x182/frame 0xfffffe00217b5e00                               
panic() at panic+0x43/frame 0xfffffe00217b5e60                                  
dblfault_handler() at dblfault_handler+0x1d1/frame 0xfffffe00217b5f20           
Xdblfault() at Xdblfault+0xd7/frame 0xfffffe00217b5f20                          
--- trap 0x17, rip = 0xffffffff80c0b9dc, rsp = 0xfffffe00aafcb000, rbp =
0xfffffe00aafcb020 ---                
in_epoch_verbose() at in_epoch_verbose+0xc/frame 0xfffffe00aafcb020             
pfi_kif_update() at pfi_kif_update+0x20/frame 0xfffffe00aafcb080                
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafcb0e0               
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafcb140               
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafcb1a0               
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafcb200               
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafcb260    

... lots more ...

pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce3e0
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce440
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce4a0
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce500
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce560
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce5c0
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce620
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce680
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce6e0
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce740
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce7a0
pfi_kif_update() at pfi_kif_update+0x27c/frame 0xfffffe00aafce800
pfi_attach_ifnet_event() at pfi_attach_ifnet_event+0xd6/frame
0xfffffe00aafce850
ifhwioctl() at ifhwioctl+0x10db/frame 0xfffffe00aafce8d0
ifioctl() at ifioctl+0x3ac/frame 0xfffffe00aafce9a0
kern_ioctl() at kern_ioctl+0x27b/frame 0xfffffe00aafcea00
sys_ioctl() at sys_ioctl+0x127/frame 0xfffffe00aafcead0
amd64_syscall() at amd64_syscall+0x140/frame 0xfffffe00aafcebf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00aafcebf0
--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x800495e8a, rsp =
0x7fffffffe278, rbp = 0x7fffffffe290 ---
db>

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