https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191359
Bug ID: 191359
Summary: [PANIC] Memory modified after free w/MEMGUARD build
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: Needs Triage
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: p...@freebsd.org
db:0:pho> bt
Tracing pid 785 tid 100153 td 0xfffff8002a52c490
uma_find_refcnt() at uma_find_refcnt+0x33/frame 0xfffffe17288d2590
mb_ctor_clust() at mb_ctor_clust+0x8f/frame 0xfffffe17288d25c0
uma_zalloc_arg() at uma_zalloc_arg+0x164/frame 0xfffffe17288d2660
m_getjcl() at m_getjcl+0xa3/frame 0xfffffe17288d26b0
m_getm2() at m_getm2+0xe7/frame 0xfffffe17288d2700
m_uiotombuf() at m_uiotombuf+0xa4/frame 0xfffffe17288d2770
sosend_generic() at sosend_generic+0x6cc/frame 0xfffffe17288d2820
sosend() at sosend+0x5d/frame 0xfffffe17288d2880
soo_write() at soo_write+0x42/frame 0xfffffe17288d28b0
dofilewrite() at dofilewrite+0x88/frame 0xfffffe17288d2900
kern_writev() at kern_writev+0x68/frame 0xfffffe17288d2950
sys_write() at sys_write+0x63/frame 0xfffffe17288d29a0
amd64_syscall() at amd64_syscall+0x278/frame 0xfffffe17288d2ab0
How to repeat:
sysctl vm.memguard.options=3; sysctl vm.memguard.desc=allocdirect +
ssh activity
Details: http://people.freebsd.org/~pho/stress/log/memguard4.txt
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