https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248046
Bug ID: 248046
Summary: Panic when creating a bridge interface
Product: Base System
Version: 12.1-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
This was also reported on freebsd-stable as "Kernel panic on recent 12.1 on
bridge creation."
Tested on a kernel built with INVARIANTS, on
FreeBSD-12.1-STABLE-amd64-20200709-r363017-disc1.iso
Repro: ifconfig bridge create
Unread portion of the kernel message buffer:
panic: malloc(M_WAITOK) in epoch context
cpuid = 1
time = 1594992085
KDB: stack backtrace:
#0 0xffffffff80bda5b5 at kdb_backtrace+0x65
#1 0xffffffff80b934ab at vpanic+0x17b
#2 0xffffffff80b932b3 at panic+0x43
#3 0xffffffff80b6e414 at malloc_dbg+0xd4
#4 0xffffffff80b6e1c1 at malloc+0x21
#5 0xffffffff82a16b69 at bridge_ioctl_gifs+0xb9
#6 0xffffffff82a1845b at bridge_ioctl+0x32b
#7 0xffffffff80c893ea at ifioctl+0x9ea
#8 0xffffffff80bf93d5 at kern_ioctl+0x2d5
#9 0xffffffff80bf9057 at sys_ioctl+0x127
#10 0xffffffff81055874 at amd64_syscall+0x2a4
#11 0xffffffff8102c880 at fast_syscall_common+0x101
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