[Bug bpf/24329] New: bpf userspace: consecutive map string lookups overwrite each other
me at serhei dot io
sourceware-bugzilla@sourceware.org
Wed Mar 13 16:30:00 GMT 2019
https://sourceware.org/bugzilla/show_bug.cgi?id=24329
Bug ID: 24329
Summary: bpf userspace: consecutive map string lookups
overwrite each other
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: bpf
Assignee: systemtap at sourceware dot org
Reporter: me at serhei dot io
Target Milestone: ---
global tab
probe begin {
printf("BEGIN\n")
tab["foo"] = "a"; tab["bar"] = "b"
exit()
}
probe end {
x = tab["foo"]; y = tab["bar"]
printf("%s%s\n", x, y)
}
should print: ab
prints: bb
Both map lookups overwrite lookup_tmp in the userspace interpreter.
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