https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250073
Bug ID: 250073
Summary: LOR between cc_list and vnet_rwlock (during reboot)
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: g...@freebsd.org
During a reboot of a recent -CURRENT installation, the following LOR is
reproducible reported.
lock order reversal:
1st 0xffffffff827a37e0 cc_list (cc_list, rw) @
/boiler/nfs/src/sys/netinet/cc/cc.c:226
2nd 0xffffffff827a2fd8 vnet_rwlock (vnet_rwlock, rw) @
/boiler/nfs/src/sys/netinet/cc/cc.c:189
lock order cc_list -> vnet_rwlock attempted at:
#0 0xffffffff811fe7fe at witness_checkorder+0x13de
#1 0xffffffff811468ed at __rw_rlock_int+0xcd
#2 0xffffffff8114726e at __rw_rlock+0x2e
#3 0xffffffff814134fa at cc_deregister_algo+0xaa
#4 0xffffffff814138c9 at cc_modevent+0x29
#5 0xffffffff81116542 at module_shutdown+0xb2
#6 0xffffffff8114d8c5 at kern_reboot+0x695
#7 0xffffffff8114d1db at sys_reboot+0x5fb
#8 0xffffffff81834371 at amd64_syscall+0x281
#9 0xffffffff817f4ade at fast_syscall_common+0xf8
KERNCONF is the following:
include GENERIC
options RATELIMIT
options TCPHPTS
options KERN_TLS
options ROUTE_MPATH
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